EBYTE E95M-DTU Lora Wireless Modem User Manual

User Manual for EBYTE models including: 400SLxx-xxx, E95M-DTU Lora Wireless Modem, E95M-DTU, Lora Wireless Modem, Wireless Modem

李燕玲

File Info : application/pdf, 29 Pages, 1.29MB

E95M-DTU(400SLxx-xxx) UserManual RU V1.1

E95M-DTU(400SLxx-xxx)
1

Chengdu Ebyte Electronic Technology Co.,Ltd.

E95M-DTU(400SLxx-xxx) User Manual

Contents
Disclaimer .......................................................................................................................................................................3 1 Introduction ................................................................................................................................................................. 4
1.1 Brief Introduction ............................................................................................................................................. 4 1.2 Features .............................................................................................................................................................4 1.3 Quick start ........................................................................................................................................................ 5 1.4 Description of each department ....................................................................................................................... 7 1.5 Installation dimensions ...................................................................................................................................10 2. Qualification ............................................................................................................................................................. 11 2.1 Model and specification ................................................................................................................................. 11 2.2 General specifications and parameters ...........................................................................................................12 2.3 Frequency range and channel number ........................................................................................................... 12 2.4 Transmitting power level ................................................................................................................................12 2.5 Air rate rating ..................................................................................................................................................13 2.6 Current parameters ....................................................................................................................................... 13 2.7 Length of receiving and receiving and the subcontracting method .............................................................13 3. Functional detailed explanation ............................................................................................................................... 14 3.1 Fixed point launch (162 m) ............................................................................................................................ 14 3.2 Broadcast transmission (16 approx.) ..............................................................................................................14 3.3 Broadcast address ........................................................................................................................................... 14 3.4 Listen address ................................................................................................................................................. 14 4. work pattern ..............................................................................................................................................................15 4.1 Transmission mode (mode 0) ......................................................................................................................... 15 4.2 WOR Mode (Mode 1) .................................................................................................................................... 15 4.3 Configuration Mode (Mode 2) ....................................................................................................................... 16 5. Register read and write control ................................................................................................................................ 16 5.1 Instruction format ........................................................................................................................................... 16 5.2 Register description ........................................................................................................................................17 5.3 Factory default parameters .............................................................................................................................20 6. AT Directive ..............................................................................................................................................................20 6.1 The AT instruction sheet .................................................................................................................................20 6.2 AT parameter resolution ................................................................................................................................. 22 6.3 Notes for serial port upgrade firmware .......................................................................................................... 23 7. Use of the relay network mode ................................................................................................................................ 23 8. Description of the upper computer machine configuration ..................................................................................... 24 9. Program the radio stations ........................................................................................................................................25 10. The connection diagram in the test and practical application ................................................................................26 11. Related products ..................................................................................................................................................... 26 12. Practical applications ..............................................................................................................................................27 13. Notes for use ...........................................................................................................................................................28 14. Important statement ................................................................................................................................................29 Revise the history ......................................................................................................................................................... 29 About us ........................................................................................................................................................................29

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E95M-DTU(400SLxx-xxx) User Manual

Disclaimer
EBYTE reserves all rights to this document and the information contained herein. Products, names, logos and designs described herein may in whole or in part be subject to intellectual property rights. Reproduction, use, modification or disclosure to third parties of this document or any part thereof without the express permission of EBYTE is strictly prohibited.
The information contained herein is provided "as is" and EBYTE assumes no liability for the use of the information. No warranty, either express or implied, is given, including but not limited, with respect to the accuracy, correctness, reliability and fitness for a particular purpose of the information. This document may be revised by EBYTE at any time. For most recent documents, visit www.cdebyte.com.

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1 Introduction

E95M-DTU(400SLxx-xxx) User Manual

1.1 Brief Introduction
E95M-DTU (400 SLxx-xxx) is a wireless digital radio station using military grade LoRa modulation technology, with multiple transmission modes, working in (410.125MHz~493.125MHz) band (default 433.125MHz), the station provides transparent RS485 / RS232 / TTL interface, plastic case, rail installation structure, support 8~28V (DC) wide voltage, voltage input. LoRa spread frequency technology will bring further communication distance, and have the advantage of strong anti-interference ability.
Wireless digital radio as a kind of communication media, and optical fiber, microwave, open line, have certain scope of application: it provides some special conditions of private network monitoring signal of real-time and reliable data transmission, with low cost, convenient installation and maintenance, shooting ability, flexible network structure, far coverage characteristics, suitable for point and scattered, complex geographical environment, and PLC, RTU, rainfall gauge, liquid level meter data terminal.
1.2 Features
Using the latest LoRa technology, than the traditional LoRa digital radio distance is farther, more powerful performance;
Support serial port upgrade firmware, update firmware is more convenient; Support AT instruction, it is more convenient to use; Ultra-small volume, size of 80 * 28 * 27mm, easy and quick installation; E95M-DTU (400SL22-xxx) is up to 5 Km under ideal conditions; E95M-DTU (400SL30-xxx) is up to 10 Km under ideal conditions; With data encryption, the subcontract length can be set; Using flame retardant plastic shell, guide rail type installation structure, convenient and efficient installation; Using hidden button to switch the working mode, to avoid false triggering, the equipment operation is more reliable; Simple and efficient power supply design, support the power supply distribution device or voltage line mode,
support 8~28V (DC) power supply; The transmitting power is 22 / 30 dBm, and supports multi-stage adjustable, all technical indicators meet the
industrial standards; Support for 2.4K~62.5Kbps of data transmission rate; Support for Modbus protocol transmission; Support RSSI signal strength indication function for assessing signal quality, improving communication network and
ranging; Support LBT function, the station automatically sends according to the current ambient noise intensity. Greatly
improve the communication success rate of radio stations in the harsh environment; Support for wireless transmission of command data packet, remote configuration or reading of radio station
parameters; Support the communication key function, and effectively prevent the data from being intercepted; It can realize the multi-stage relay networking, effectively expand the communication distance, and realize the

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E95M-DTU(400SLxx-xxx) User Manual

ultra-long distance communication;
Working temperature range: -40 ~ + 85, adapt to a variety of harsh working environment, real industrial-grade products;
Power reverse connection protection, adoptive protection, antenna surge protection and other multiple protection functions, greatly increase the reliability of the station;
Communication ports and power supply interfaces shall be isolated with high protection; Powerful software functions, all parameters can be programmed by setting: such as power, frequency, air rate,
address ID, etc.; Built-in watchdog, and precise time layout, in the event of abnormalities, the station will automatically restart, and
can continue to work according to the previous parameter settings.

1.3 Quick start

1 You need to prepare two E95M-DTU (400 SLxx-xxx)

2 First, install the antenna to the digital radio station, and then install the power supply. The user selects the power adapter according to the need.

Chengdu Ebyte Electronic Technology Co.,Ltd. 3 Using USB to RS 235 or other means;

E95M-DTU(400SLxx-xxx) User Manual

4 Start two serial port debugging assistant, select serial port port rate of 9600bps (default), check mode of 8N1, can achieve serial port transmission;

5 If the customer needs to switch the working mode, it can switch the different working modes (M0 indicator light, M1 indicator light) through the Mode button control. Press the Mode button once for about 1ms to switch the mode once. Details of the mode switching are shown in the following table:

No.

Class

Note

pattern 0 pattern 1 pattern 2

Through transmission
mode
WOR pattern
Configuration mode

light goes out
light goes out
light on

light goes out
light on light
goes out

Serial port open, wireless open, transparent transmission (factory default mode), support special command air configuration. Can be defined as WOR sender and WOR receiver, support aerial wake up The user accthe register through the serial port to control the working status of the station. The user can configure the station

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E95M-DTU(400SLxx-xxx) User Manual through the upper computer configuration software.

Note: The radio station has the function of power loss saving mode (the default setting is to transmission mode). The user needs to switch the corresponding mode according to M1 and M0 indicators (effective immediately).

1.4 Description of each department

1.4.1 RS485 interface

No.

Name

Function

Description

PWR

power light

Light ates when power is on.

Send / receive the Flash light is red when sending data and green when

T/R

indicator light

receiving data.

Mode indicator light Operating mode indicator light.

Mode

Mode switch button Working mode switching control.

GND

Ground.

The RS485 signal A Standard RS485 interface.

The RS485 signal B Standard RS485 interface.

GND

DC power input port, voltage line port.

VCC

DC power input port, voltage line port.

ANT

radio frequency interface

SMA-KExternal thread inner hole.

Note: When the radio station is connected to multiple devices, but not with a single device, try to parallel 120 resistance between terminal 485_A and 485_B terminals.

E95M-DTU (400 SLxx-xxx) can be powered by 8~28V (DC) power supply, and the wiring port is connected by a terminal (2 Pin).

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1.4.2 RS232 interface

E95M-DTU(400SLxx-xxx) User Manual

No.

Name

Function

Description

PWR

Power light

Light ates when power is on.

Send / receive the Flash light is red when sending data and green when

T/R

indicator light

receiving data.

Mode indicator light Operating mode indicator light.

Mode

Mode switch button Working mode switching control.

Signal ground

Anti-interference, grounding.

The RS232 bus TX RS232 interface The TX interface is connected to the

interface

device RX interface.

The RS232 bus RX RS232 interface The RX interface is connected to the

interface

device TX interface.

GND

DC power input port, voltage line port.

VCC

DC power input port, voltage line port.

ANT

Radio frequency interface

SMA-KExternal thread inner hole.

E95M-DTU (400 SLxx-xxx) can be powered by 8~28V (DC) power supply, and the wiring port is connected by a terminal (2 Pin).

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1.4.3 TTL interface

E95M-DTU(400SLxx-xxx) User Manual

No.

Name

Function

Description

PWR

Power light

Light ates when power is on.

Send / receive the Flash light is red when sending data and green when

T/R

indicator light

receiving data.

Mode indicator light Operating mode indicator light.

Mode

Mode switch button Working mode switching control.

Signal ground

Anti-interference, grounding.

The TTL bus TX RS232 interface The TX interface is connected to the

interface

device RX interface.

The TTL bus RX RS232 interface The RX interface is connected to the

interface

device TX interface.

GND

DC power input port, voltage line port.

VCC

DC power input port, voltage line port.

ANT

Radio frequency interface

SMA-KExternal thread inner hole.

E95M-DTU (400 SLxx-xxx) can be powered by 8~28V (DC) power supply, and the wiring port is connected by a terminal (2 Pin).

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1.5 Installation dimensions

E95M-DTU(400SLxx-xxx) User Manual

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2. Qualification

E95M-DTU(400SLxx-xxx) User Manual

2.1 Model and specification

Model
E95M -DTU(400SL22-485)

Frequency MHz
410.125 493.125

E95M -DTU(400SL 22-232)

410.125 493.125

E95M -DTU(400SL 30-485)

410.125 493.125

E95M -DTU(400SL 30-232)

410.125 493.125

E95-DTU(400SL22-TTL )

410.125 493.125

E95-DTU(400SL 30-TTL )

410.125 493.125

Transmitting power dBm 22
22
30
30
22
30

Reference distance
km 5
5
10
10
5
10

Specification
New generation of LoRa frequency expansion, DC power supply New generation of LoRa frequency expansion, DC power supply New generation of LoRa frequency expansion, DC power supply New generation of LoRa frequency expansion, DC power supply The new generation of LoRa frequency expansion, DC power supply, isolated version The new generation of LoRa frequency expansion, DC power supply, isolated version

Application
Suitable for distant, vulnerable environments.
Suitable for distant, vulnerable environments.
Suitable for distant, vulnerable environments.
Suitable for distant, vulnerable environments.
Suitable for long distance, vulnerable to interference environment, high protection Suitable for long distance, vulnerable to interference environment, high protection

Note: In sunny weather, no shelter, 12V / 1A power supply, 5 dBi suction cup antenna, the antenna is 2 meters away from the ground height, using the factory default parameters.

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2.2 General specifications and parameters

E95M-DTU(400SLxx-xxx) User Manual

No.

Item

Specifications

Description

product size

80*28*27 mm

See installation size for details

Product weight

32 g

Weight tolerance of 2g

working

-40+85

technical grade

temperature

voltage range

828V DC 12V or 24V

communication

RS485, RS232, TTL three choose one, subject to the physical

RS485/RS232/TTL

interface

identification of the product

Baud rate

Factory default: 9600 The Baud rate range is from 1200 to 115200

address code

Factory default 0

A total of 65,536 address codes can be set

2.3 Frequency range and channel number

Model
E95M -DTU(400SLxx -xxx )

Frequency MHz
433.125M

Transmitting power dBm
410.125493.125M

Reference distance
km
1M

Specification 84, Half duplex

Note: In the same area, use multiple sets of transmission stations to communicate one to one at the same time. It is suggested that the channel interval be set above 2 MHz.

2.4 Transmitting power level

Model

22dBm / 30dBm

17dBm / 27dBm

13dBm / 24dBm 10dBm / 21dBm

E95M -DTU(400SLxx

Factory default

-xxx )

Note: The lower the transmission power is, the closer the transmission distance is, but the working current will not decrease in the same proportion, so it is recommended to use the maximum transmission power.

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2.5 Air rate rating

E95M-DTU(400SLxx-xxx) User Manual

Model

Default air rate bps

E95M -DTU(400SLxx-xxx )

2.4k

Equal series 6

Air rate grade k bps
2.44.89.619.238.462.5

Note: The higher the air speed setting, the faster the transmission rate, and the closer the transmission distance; so if the rate meets the usage requirements, the lower the air speed, the better.
2.6 Current parameters

Model
E95M -DTU(400SL 22-xxx )
E95M -DTU(400SL 30-xxx )

Emission current mA

12V

24V

250

125

Waiting current mA

12V

24V

Note: It is recommended to retain more than 50% of the current margin when selecting the power supply, which is conducive to the long-term and stable operation of the radio station.

2.7 Length of receiving and receiving and the subcontracting method

ts E95M -DTU(400SLxx
-xxx )

Cache size 1000 Bytes

Subcontracting method Can be sent by instruction subcontracting 32 / 64 / 128 /
240 bytes

pay attention to: 1. If the single received data of the radio station is greater than the single package capacity, the excess data will be automatically
allocated to the second transmission until the transmission is completed; 2. Single single received data cannot be greater than the cache capacity.

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3. Functional detailed explanation
3.1 Fixed point launch (162 m)

E95M-DTU(400SLxx-xxx) User Manual

3.2 Broadcast transmission (16 approx.)

3.3 Broadcast address

Example: Set the station A address to 0xFFFF and the channel to 0x04. When station A is used as transmission (the same mode, transparent transmission mode), all receiving stations under the 0x04
channel can receive data to achieve the purpose of broadcasting.

3.4 Listen address

Example: Set the station A address to 0xFFFF and the channel to 0x04.

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E95M-DTU(400SLxx-xxx) User Manual

When station A is received, it can receive all the data under the 0x04 channel to achieve the purpose of listening.

4. work pattern

E95-DTU has three working modes. When there is no harsh low power consumption demand, it is recommended to configure the radio station as the transparent transmission mode (mode 0);
The default setting of the station is transmission mode (mode 0).

order number

class

explanatory note

pattern 0

Through transmission
mode

light goes out

Serial port open, wireless open, transparent transmission (factory default mode), support special command air configuration.

pattern 1

WOR pattern

light

Can be defined as WOR sender and WOR receiver, support

light on

goes out

aerial wake up

pattern 2

Configuration mode

light on

light goes out

The user accthe register through the serial port to control the working status of the station. The user can configure the station through the upper computer configuration software.

Note: If no low power requirements, no concern about WOR mode (mode 1).

4.1 Transmission mode (mode 0)

type

When the M0 indicator is out, the M1 indicator is out and the station works in mode 0

launch receive

Users can enter the data through the serial port, and the radio station will start the wireless transmission.
The radio wireless reception function is turned on, and it will be output through the serial port TXD pin after receiving the wireless data.

4.2 WOR Mode (Mode 1)

type launch receive

When the M0 indicator is on, the M1 indicator is off and the station works in mode 1
When defined as the transmitting side, the wake-up code is automatically added for a certain time before launch
Data can be received normally, and the receiving function is equivalent to mode 0

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4.3 Configuration Mode (Mode 2)

E95M-DTU(400SLxx-xxx) User Manual

type

When the M0 indicator is off, the M1 indicator lights on and the station works in mode 2

launch

Wireless configuration is available

receive

Wireless configuration is available

configure

The user can access the register to configure the radio operating status

5. Register read and write control

5.1 Instruction format

Under the configuration mode (mode 2: M 1 = OFF, M 0 = ON), the supported instruction list is as follows (when setting, only 9600,8N1 format is supported):

orde

r num

instruction format

define

ber

Instructions: C0 + starting address + length + parameter

Response: C1 + starting address + length + parameter

Example 1: The configuration channel is 0x09

Command start address length parameter

Set the register

Send to: C0 05 01 09 Return: C1 05 01 09

Example 2: simultaneously configure the module address (0x1234), network address (0x00), serial port (9600 8N1), empty speed (2.4K) Send to: C0 00 04 12 34 00 60 Return: C1 00 04 12 34 00 60
Instructions: C1 + starting address + length Response: C1 + starting address + length + parameter

Example 1: Read the access channel

Command start address length parameter

Read the register

Send to: C1 05 01 Return: C1 05 01 09

Example 2: Read the module address, network address, serial port, and empty speed simultaneously Send to: C1 00 04 Return: C1 00 04 12 34 00 60
Instructions: C2 + starting address + length + parameter Response: C1 + starting address + length + parameter

Set up the temporary Example 1: The configuration channel is 0x09

Command start address length parameter

Send to: C2 05 01 09

Return: C1 05 01 09

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E95M-DTU(400SLxx-xxx) User Manual

Example 2: simultaneously configure the module address (0x1234), network address (0x00), serial port (9600 8N1), empty speed (2.4K) Send to: C2 00 04 12 34 00 60 Return: C1 00 04 12 34 00 60
Instruction: CF CF + General instruction Response: CF CF + conventional response

Example 1: The wireless configuration channel is 0x09

Wireless command header command starting address length parameter

Wireless configuration

Send to: CF CF C0 05 01 09 Return: CF CF C1 05 01 09

Example 2: wireless simultaneous configuration module address (0x1234), network address (0x00), serial port (9600 8N1), and airspeed (2.4K) Send to: CF CF C0 00 04 12 34 00 60 Return: CF CF C1 00 04 12 34 00 60

format error

Format error response FF FF FF / "=ERR "

5.2 Register description

order number
00H 01H 02H
03H

read-w rite
Read / write Read / write Read / write
Read / write

name ADDH ADDL NETID
REG0

description

remarks

ADDH (default 0) ADDL (default 0)

NETID (default 0)

5 UART Serial Rate (bps)

0 The serial port port rate is 1200

1 The serial port port rate is 2400

0 The serial port port rate is 4800

Serial port port rate of 9600

(default)

The serial port port rate is

19200

The serial port port rate is

38400

The serial port port rate is

57600

The serial port port rate is

115200

3 Serial check bit

0 8N1 (by default)

1 8O1

0 8E1

1 8N1 (equivalent to 00)

Module address of high and low bytes; Note: When the module address is equal to FFFF, it can be used as a broadcast and listening address, that is, the module will not filter the address
Network address, used to distinguish networks; When communicating with each other, set it as the same.
The two modules of mutual communication, the serial port port rate can be different, the calibration mode can also be different; When large data packets are launched continuously, users need to consider the data blocking caused by the same port rate, or may even be lost; It is generally recommended that the same have the same the same.
The communication two sides serial port mode can be different;

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0 Wireless aerial rate (bps)

0 Aerial rate of 2.4k (default)

1 The air rate is 4.8k

0 The air rate is 9.6k

1 Aerial rate 19.2k

0 Aerial rate 38.4k

1 Aerial rate 62.5k

6 Subcontract setting

0 240 bytes (by default)

1 128 Bytes

0 64 Bytes

1 32 Bytes

5 The RSSI ambient noise is enabled 0 Disable (default)

1 start using

3 continue to have

2 Software mode switching

0 Disable (default)

04H

Read /

REG1

write

1 start using

0 transmitting power

0 22 / 30 dBm (by default)

1 17/27dBm

E95M-DTU(400SLxx-xxx) User Manual
Both parties to communicate, the air rate, must be the same;
The higher the air rate, the smaller the delay, and a shorter the transmission distance.
The data sent by the user is less than the subcontract length, and the serial port output of the receiving end is presented as uninterrupted continuous output;
If the data sent by the user is greater than the subcontract length, the serial port of the receiving end will subcontract the output.
When enabled, instruction C0 C1 C2 C3 can read register in transmission mode or WOR transmission mode; Register 0x00: current ambient noise RSSI; Register 0X01: RSSI last received (The current channel noise is: dBm = (256-RSSI)); Instruction format: C0 C1 C2 C3 + starting address + read length; Return: C1 + address + read length + read valid value; like send C0 C1 C2 C3 00 01 Return to C1 00 01 RSSI (address only starts from 00)
If we use our upper position computer configuration parameters, we will actively close the bit. If you do not want to use M0 M1 pins to switch working mode, you can enable this function, use specific serial instructions to switch mode. Format: C0 C1 C2 C3 02 + working mode Send C0 C1 C2 C3 02 00 to transmission mode Send the C0 C1 C2 C3 02 01 to switch to the WOR mode Send the C0 C1 C2 C3 02 02 to switch to the configuration mode Send the C0 C1 C2 C3 02 03 to switch to the sleep mode
Return: C1 C2 C3 02 + working mode Note: When this function is enabled, only 9600 baud rate is supported in WOR mode and sleep mode.
Power and current are nonlinear relationship, when the maximum power, the power supply efficiency is the highest;

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E95M-DTU(400SLxx-xxx) User Manual

05H
06H
07H 08H 80H 86H

Read / write
Read / write
write write a slight pause

REG2
REG3
CRYPT _H
CRYPT _L PID

0 13/24dBm

1 10/21dBm

Channel Control (CH)

0-83 each represent a total of 84 channels (900 band

applicable)

7 Enable the RSSI bytes

0 Disable (default)

1 start using

6 transmission mode

0 Transparent transfer (by default)

1 Fixed-point transmission

5 Relay function

0 Disable Relay function (default)

1 Enable relay function

4 LBT enable 0 Disable (default)

1 start using

3 The WOR mode transceiver control

WOR recipient (default)

Working in WOR listening mode, the listening 0
cycle see below (WOR cycle), can save a lot of

power consumption.

The WOR transmitter party

The module sends and receives open, and adds 1
a certain time wake code when transmitting

data.

1 0 WOR period

0 0 500ms

0 1 1000ms

1 0 1500ms

1 1 2000ms (by default)

0 0 2500ms

0 1 3000ms

1 0 3500ms

1 1 4000ms

Key High Bytes (default 0)

Key Low Bytes (default 0)

Product information is 7 bytes

The current will not decrease in equal proportion with the power decrease.
Actual frequency = 410.125 + CH * 1M
When enabled, the module receives wireless data and the output through the serial port TXD will follow an RSSI strength byte.
During the fixed-point transmission, the module will identify the first three bytes of the serial port data as: address high + address low + channel, and take it as the wireless transmission target. After the relay function is enabled, if the target address is not the module itself, the module will start a forward; To prevent data return, it is recommended to work with fixed point mode; namely, target address and source address are different. After enabling, the wireless data will be monitored before transmission, which can avoid interference to a certain extent, but may bring data delay;
The maximum residence time of LBT is 2 seconds, reaching two seconds.
Only valid for mode 1; 1. In the receiving mode of word, the module can modify the delay time after wake up, and the default time is 0; 2. The receiving terminal needs to send instruction C0 09 02 03 E8 in configuration mode (C0 is a write command, 09 is the register initiator address, 02 is the length, 03 E8 is the set delay, the maximum FFFF is 65535ms, and set to 0, the wake up delay is closed.) 3. Data can be sent within the delay
Only valid for mode 1;
Cycle T= (1 + WOR) * 500ms, maximum 4000ms, minimum 500ms;
The longer the WOR monitoring interval period, the lower the average power consumption, but the greater the data delay;
It must be consistent (very important)
Write only, read back to 0; For encryption, to avoid the aerial wireless data
intercepted by similar modules; These two bytes will be used as the calculation factor to encrypt the wireless signal in the air.
Use has been suspended for reserved only. Please refer to the AT + DEVTYPE and AT + FWCODE

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in reading

E95M-DTU(400SLxx-xxx) User Manual instructions in Section 9.1.

5.3 Factory default parameters

Factory default parameter value

Module model

frequency

E95M -DTU (400SL 20-485)
E95M -DTU (400SL 30-485)

433.125MHz 433.125MHz

address 0x0000 0x0000

C0 00 09 00 00 00 60 00 23 03 00 00

channel

Air rate

Baud rate

0x 23

2.4kbps

9600

Serial port format

transmittin g power

8N1

20dBm

0x 23

2.4kbps

9600

8N1

30dBm

6. AT Directive

Using AT instructions for parameter configuration or query should be performed in configuration mode; AT instructions are used in configuration mode. AT instructions are divided into three categories: command
instruction, setting instruction and query instruction; Users can go through the words " AT + HELP =?"Query to the AT instruction set supported by the module,
the AT instruction adopts the port rate of 9600 8N1; When the input parameter exceeds the range, it will be limited. Please do not let the parameter exceed the
range to avoid the unknown situation.

6.1 The AT instruction sheet

command instruction
AT + IAP (Use carefully, see article 6.3 serial port upgrade firmware considerations)
AT+RESET AT+DEFAULT

description
Enter the IAP upgrade mode
Equipment restart Configure the parameters to restore the default And the device restarted

instance
AT+IAP
AT+RESET AT+DEFAULT

Example description
Enter the IAP upgrade mode
Equipment restart Configure the parameters to restore the default And the device restarted

Set instructions AT+UART=baud,parity

description

instance

Set the port rate and check AT+UART=3,0

Example description Set the port rate to 9600,8N1

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E95M-DTU(400SLxx-xxx) User Manual

AT+RATE=rate AT+PACKET=packet
AT+WOR=role,period
AT+POWER=power

Set air rate Set the length of the package Set the WOR roles and cycles Set the sending power

AT+RATE=7 AT+PACKET=0
AT+WOR=0,3
AT+POWER=0

AT+TRANS=mode AT+ROUTER=router AT+LBT=lbt
AT+ERSSI=erssi

Set the send mode Set relay mode Set the Listen Before Talk function switch Set the ambient noise RSSI switch

AT+TRANS=1 AT+ROUTER=1 AT+LBT=1
AT+ERSSI=1

AT+DRSSI=data_rssi AT+ADDR=addr

Sets the receiving data AT+DRSSI=1

RSSI switch

Set module address

AT+ADDR=1234

AT+CHANNEL=channel
AT+NETID=netid AT+KEY=key

Set up the module working channel Set the network ID Set the module key

AT+CHANNEL=23
AT+NETID=2 AT+KEY=1234

AT+DELAY=delay

Set the WOR delay sleep time

AT+DELAY=1000

AT+SWITCH=switch AT+MODE=mode

Set the software switching mode switch

AT+SWITCH=1

Switch the working mode AT+MODE=0

Set the air rate to 62.5K Set the packet to 240 bytes

Set to WOR receive for a

period of 2000ms

The transmission power is

set to be 20 / 30 dBm

Set to point mode

Set to the relay mode

Set on, refer to section 5.2

LBT enable for details

Set on, refer to section 5.2

RSSI environmental noise

function in detail

The receive data RSSI

function is turned on

Set the module address to

1234

Set the frequency to

433.125M

Set the network ID to 2

Set the module key to 1234

Set the WOR delay

dormancy to 1000ms

(during which send tasks

can be performed. It is

often used for the WOR

receiver to perform

wireless

transmission

without switching to the

transtransmission mode.

Set on in configuration

mode to allow software

switching

Switch to transmission

mode

Query instructions AT+HELP=? AT+DEVTYPE=? AT+FWCODE=?
AT+UART=?

description

Query the AT timetable

Query module model

Query

firmware

encoding

Query the baud rate and

Return an example
DEVTYPE=E90M-DTU(400SL30) FWCODE=7432-0-10
AT+UART=3,0

Example description Returns the AT repertoire Return Module Model Return firmware version
Return to a port rate of

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E95M-DTU(400SLxx-xxx) User Manual

AT+RATE=? AT+PACKET=?
AT+WOR=? AT+POWER=? AT+TRANS=? AT+ROUTER=? AT+LBT=? AT+ERSSI=? AT+DRSSI=? AT+ADDR=? AT+CHANNEL=? AT+NETID=? AT+KEY=?
AT+DELAY=? AT+SWITCH=
AT+MODE=

the check Query air rate
Query the length of the package Query the WOR roles and cycles Query send power
Query send mode
Query Relay Mode Query the Listen Before Talk function switch Query the ambient noise RSSI switch Query the RSSI output
Query module address
Query the module working channel Query network ID
Query module key
Query WOR delay dormancy time Query software switch mode switch Query the current working mode (available in all modes)

AT+RATE=7 AT+PACKET=0
AT+WOR=0,3 AT+POWER=0 AT+TRANS=1 AT+ROUTER=1 AT+LBT=1 AT+ERSSI=1 AT+DRSSI=1 AT+ADDR=1234 AT+CHANNEL=23 AT+NETID=2 Read is not supported (security considerations) AT+DELAY=1000 AT+SWITCH=0
AT+MODE=0

9600,8N1 The return to the air rate is 62.5k Return packet is 240 bytes Return to WOR receive with a period of 2000ms The return sending power is 20 / 30 dBm Returns to the fixed-point mode Returns to the relay mode Return to the LBT switch status Return to the ambient noise switch state The return-channel RSSI function is turned on The return module address is 1234 The return frequency is set at 433.125M The return network ID is 2 return ERR
The return WOR delay sleep time is 1000ms Software switching mode is turned off Return to the current transmission mode

6.2 AT parameter resolution

When the serial port receives the correct instruction, the serial port returns "instruction =OK", otherwise it returns

"= ERR"

Instruction parameters

Parameter meaning

Baud (serial port rate)

0:1200 1:2400 2:4800 3:9600 4:19200 5:38400 6:57600 7:115200

Parity (Serial port check bit)

0:8N1

1:8O1

2:8E1

3:8N1

Rate (air rate)

0:2.4K 4:9.6K

1:2.4K 2:2.4K 3:4.8K 5:19.2K 6:38.4K 7:62.5K

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Packet (Packet length)

0:240 1:128 2:64

3:32

Role (WOR role)

0: receive 1: send

Period (WOR Cycle)

0:500ms 1:1000ms 2:1500ms 3:2000ms 4:2500ms 5:3000ms 6:3500ms 7:4000ms

Power (transmit power)Note 1

0:22dBm 0:30dBm

1:17dBm 1:27dBm

2:13dBm 2:24dBm

3:10dBm 3:21dBm

Mode (Transport mode)

0: transparent 1: fixed point

Router (Relay mode)

0: Off 1: On

LBT(listen before talk)

0: Off 1: On

Erssi (Environmental RSSI)

0: Off 1: On

Data _ rssi (Data RSSI)

0: Off 1: On

Addr (module address)

Module address 0~65535 (10 r)

Channel (Module channel)

Module channel 0~83 (10 decimal system)

Netid(network ID)

Module network 0~255 (10 r)

Key(cipher code)

Module key 0~65535 (10 r)

Delay (WOR delay dormancy)

Delay hibernation 0~65535 (10 decimal point)

Note 1: Different module sets for different powers. You can check the transmitting power in manual 6.2.

6.3 Notes for serial port upgrade firmware

If the customer needs to upgrade the firmware, it needs to find the corresponding BIN file provided by the official, and then use the official provided upper machine to upgrade the firmware. Generally, the user does not need to upgrade the firmware, so do not use the "AT + IAP" command.
First connect to RS485 / RS232 / TTL, then send "AT + IAP" command instruction in configuration mode into upgrade mode. If you need to exit the IAP upgrade mode, you need to stay on and wait for 60 seconds, the program will automatically exit, otherwise even if the restart, it will enter the upgrade mode indefinitely.
After entering the upgrade mode, the port rate will automatically switch to 115200 until you automatically exit, with a log output.

7. Use of the relay network mode

order number 1 2 3

Relay mode description
After setting the relay mode through the configuration mode, switch to the general mode, and the relay starts working. In relay mode, ADDH, ADDL is no longer used as the radio address, but corresponds to NETID forwarding pair. If one of the networks is received, it is forwarded to another network. The repeater's own network ID is invalid.
In relay mode, the relay radio cannot send and receive data and cannot perform low-power operation.

The user enters another mode from mode 3 (sleep mode), or during the reset process, the station will reset the user parameters, during which the AUX outputs a low level.

Description of the relay networking rules:

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E95M-DTU(400SLxx-xxx) User Manual

1 Forward rules, the relay can forward data between two NETIDs.

2In relay mode, ADDH \ ADDL is no longer paired as a radio address and as a NETID forwarding pair.

as shown in the figure:

Level 1 Relay

"Node 1" NETID is 08.

"Node 2" NETID is 33.

The ADDH \ ADDL for relay 1 was 08,33, respectively.

So the signal sent by node 1 (08) can be forwarded to node 2 (33)

At the same time, node 1 and node 2 have the same address, so the data sent by node 1 can be received by node 2.

Secondary Relay

The ADDH \ ADDL for relay 2 was 33,05, respectively.

So the relay 2 can forward the data of the relay 1 to the network NETID: 05.

Thus, the nodes 3 and the node 4 can receive the node 1 data. Node 4 normally outputs data, and node 3 has different addresses from node 1, so it does not output data.

bi-directional relay

As configured, data nodes 2 and 4 sent by nodes 1 may be received, and data sent by nodes 2 and 4 can also be received by nodes 1.

8. Description of the upper computer machine configuration
The following figure shows E95M-DTU (400SLxx-xxx) configure the upper machine display interface. Users can switch to configuration mode through the MODE key, and quickly configure and read parameters in the upper machine.

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E95M-DTU(400SLxx-xxx) User Manual

In the configuration computer, the radio address, frequency channel, network ID and key are all in decimal display mode, including the value range of each parameter: Network address: 0~65535 Frequency channel: 0~83 network ID:0~255 Key: 0~65535
When using the upper computer to configure the relay mode, users need to pay special attention to it. In the upper computer, the parameters are decimal display mode, so the radio address and network ID need to be converted into binary. If the network ID input by the transmitter A is 02 and the network ID input by the receiver B is 10, then the relay terminal R sets the station address, then the hex value 0X020A is converted to the decimal value 522 as the radio address filled by the relay end R. That is, the radio address value of the relay terminal R that needs to be filled in is 522.
9. Program the radio stations

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E95M-DTU(400SLxx-xxx) User Manual

work pattern

explanatory note

Configuration The indicator The indicator Stations can only be programmed by using the configuration

mode

light is bright lights go out software in the current mode

1 Programming can only be performed in specific working mode (see table above). Please sure the radio working mode is

correct.

2 Relevant parameters can be modified by opening the E95M-DTU (400 SLxx-xxx) configuration software without complex

programming.

10. The connection diagram in the test and practical application

11. Related products

product model E95-DTU(400SL22-485) E95-DTU(400SL 22-232) E95-DTU(400SL 30-485)

interf ace type
RS485
RS232
RS485

service frequency M Hz
410.125 493.125
410.125 493.125
410.125 493.125

transmit ting power dBm 22
22
30

Refer ence distan
ce 5
5
10

functional characteristics
New generation LoRa, guide rail type, RS485, E90-DTU S L system type communication, DC power supply New generation LoRa, guide rail type, RS232, E90-DTU S L system type communication, DC power supply New generation LoRa, guide rail type, RS485, E90-DTU S L system type communication, DC power supply

Chengdu Ebyte Electronic Technology Co.,Ltd.

E95-DTU(400SL 30-232)

RS232

410.125 493.125

E95-DTU(400SL22P -485) RS485

410.125 493.125

E95-DTU(400SL 22P -232) RS232

410.125 493.125

E95-DTU(400SL 30P -485) RS485

410.125 493.125

E95-DTU(400SL 30P -232) RS232

410.125 493.125

E96-DTU(400SL22-485)

RS485

410.125 493.125

E96-DTU(400SL 22-232)

RS232

410.125 493.125

E96-DTU(400SL 30-485)

RS485

410.125 493.125

E96-DTU(400SL 30-232)

RS232

410.125 493.125

E95M-DTU(400SLxx-xxx) User Manual

New generation LoRa, guide rail type, RS232,

10 E90-DTU S L system type communication, DC

power supply

New generation LoRa, guide rail type, RS232,

5 E90-DTU SL series interchange, high

protection, DC power supply

New generation LoRa, guide rail type, RS485,

5 E90-DTUL system interconnection, high

protection, DC power supply

New generation LoRa, guide rail type, RS232,

10 E90-DTU SL series interchange, high

protection, DC power supply

New generation LoRa, guide rail type, RS485,

10 E90-DTU S L series interchange, high

protection, DC power supply

New generation of LoRa, guide rail type,

5 RS485, E90-DTU S L system class

communication, AC power supply

New generation of LoRa, guide rail type,

5 RS232, E90-DTU S L system class

communication, AC power supply

New generation of LoRa, guide rail type,

10 RS485, E90-DTU S L system class

communication, AC power supply

New generation of LoRa, guide rail type,

10 RS232, E90-DTU S L system class

communication, AC power supply

12. Practical applications

Radio is suitable for all kinds of point-to-point, multi-point wireless data transmission system, such as intelligent home, Internet of things, power load monitoring, distribution network automation, hydrological hydrologic monitoring, water pipe network monitoring, city street lamp monitoring, air defense alarm control, railway signal monitoring, railway water supply centralized control, oil gas supply network monitoring, GPS positioning system, remote meter reading, electronic weighing, report, automatic target, earthquake monitoring, fire prevention, security, environmental monitoring and other industrial automation system, the chart below:

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E95M-DTU(400SLxx-xxx) User Manual

13. Notes for use

1. This radio station shall not be operated near some flammable places (such as coal mines) or explosive dangerous objects (such as detonators).
2. Suitable DC voltage power supply should be selected for strong high frequency interference resistance, small ripple, and sufficient load capacity; preferably overcurrent, overvoltage protection and lightning protection functions to ensure the normal operation of digital transmission station.
3. Do not use it in a working environment beyond the environmental characteristics of the digital transmission radio station, such as high temperature, humidity, low temperature, strong electromagnetic field, or large dust environment.
4. Do not let the transmission station continuously at full capacity, otherwise the fire may burn the transmitter. 5. The ground wire of digital transmission station should be well connected with the ground wire of external equipment (such as
PC, PLC, etc.) and the ground wire of power supply, otherwise it is easy to burn out the communication interface; do not plug or pull the serial port. 6. During the test, the matching antenna or 50 false load must damage the transmitter. If the antenna is connected, the distance between the human body should be more than 2 meters to avoid damage, do not touch the antenna during transmission. 7. Wireless data transmission stations often have different communication distances in different environments, which is often affected by temperature, humidity, obstacle density, obstacle volume and electromagnetic environment. In order to ensure stable communication, it is suggested to reserve more than 50% communication distance margin. 8. If the measured communication distance is not ideal, it is suggested to analyze and improve the communication distance from the antenna quality and antenna installation mode. Also available with support@cdebyte.com get in touch and seek help.

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E95M-DTU(400SLxx-xxx) User Manual

9. When selecting the power supply, in addition to keeping the 50% current allowance as recommended, it should be noted that the ripple should not exceed 100 mV.

14. Important statement

1. Ebai reserves the right of final interpretation and modification of all the contents in this manual. 2. Due to the continuous improvement of the hardware and software of the product, this specification may be changed without
further notice, and the latest version shall prevail.

Revise the history
edition 1.0 1.1

Revised date 2023-6-28 2024-8-5

revision note The initial version Revision content

Maintain people Hao Hao

About us
Technical support: support@cdebyte.com Documents and RF Setting download link: https://www.cdebyte.com Thank you for using Ebyte products! Please contact us with any questions or suggestions: info@cdebyte.com ------------------------------------------------------------------------------------------------Web: https://www.ru-ebyte.com Address: B5 Mould Park, 199# Xiqu Ave, High-tech District, Sichuan, China

References

WPS 文字