E22-xxxT37S is a new generation of LoRa wireless data transmission module. This series (UART) module is developed based on SEMTECH high-performance RF chip ...
E22-xxxT37S User Manual 230/433/470MHz 5W LoRa Wireless Module Chengdu Ebyte Electronic Technology Co., Ltd. Contents E22-xxxT37S User Manual DISCLAIMER........................................................................................................................................... 3 1 PRODUCT OVERVIEW...................................................................................................................... 4 1.1 PRODUCT INTRODUCTION ............................................................................................................................................................... 4 1.2 FEATURES........................................................................................................................................................................................... 4 1.3 APPLICATION SCENARIO .................................................................................................................................................................. 5 2 SPECIFICATIONS................................................................................................................................ 6 2.1 LIMIT PARAMETERS .......................................................................................................................................................................... 6 2.2 WORKING PARAMETERS.................................................................................................................................................................. 6 3 MECHANICAL DIMENSIONS AND PIN DEFINITIONS ........................................................... 7 4 RECOMMENDED CONNECTION DIAGRAM............................................................................. 9 5. FUNCTIONAL DETAILS.................................................................................................................10 5.1 FIXED - POINT TRANSMISSION.......................................................................................................................................................10 5.2 BROADCAST TRANSMISSION .........................................................................................................................................................10 5.3 BROADCAST ADDRESS...................................................................................................................................................................11 5.4 LISTENING ADDRESS.......................................................................................................................................................................11 5.5 MODULE RESET ..............................................................................................................................................................................11 5.6 AUX DETAILED EXPLANATION....................................................................................................................................................11 5.6.1 Serial port data output indication ......................................................................................................................................11 5.6.2 Wireless transmission indication ........................................................................................................................................12 5.6.3 The module is being configured ..........................................................................................................................................12 5.6.4 Notes.........................................................................................................................................................................................12 5.7 DETAILED EXPLANATION OF ABNORMAL WORKING STATUS LOG PRINTING ........................................................................13 6 WORKING MODE ............................................................................................................................. 14 6.1 MODE SWITCHING ..........................................................................................................................................................................14 6.2 NORMAL MODE (MODE 0 ).............................................................................................................................................................15 6.3 WOR MODE (MODE 1) ...................................................................................................................................................................15 6.4 CONFIGURATION MODE (MODE 2 ) ...............................................................................................................................................15 6.5 DEEP SLEEP MODE (MODE 3 ) ........................................................................................................................................................15 7 REGISTER READ AND WRITE CONTROL ............................................................................... 16 Copyright © 20122025 , Chengdu Ebyte Electronic Technology Co., Ltd. 1 Chengdu Ebyte Electronic Technology Co., Ltd. E22-xxxT37S User Manual 7.1 INSTRUCTION FORMAT ...................................................................................................................................................................16 7.2 REGISTER DESCRIPTION ................................................................................................................................................................17 7.3 FACTORY DEFAULT PARAMETERS .................................................................................................................................................20 8 RELAY NETWORK MODE USAGE .............................................................................................. 20 9 HOST COMPUTER CONFIGURATION INSTRUCTIONS ...................................................... 21 10 HARDWARE DESIGN.....................................................................................................................22 11 FAQ ...................................................................................................................................................... 23 11.1 THE TRANSMISSION DISTANCE IS NOT IDEAL............................................................................................................................23 11.2 MODULES ARE VULNERABLE TO DAMAGE................................................................................................................................24 11.3 BIT ERROR RATE TOO HIGH .......................................................................................................................................................24 12 WELDING OPERATION INSTRUCTIONS ............................................................................... 24 12.1 REFLOW TEMPERATURE ..............................................................................................................................................................24 12.2 REFLOW OVEN CURVE.................................................................................................................................................................25 13 RELATED MODELS........................................................................................................................25 REVISION HISTORY ........................................................................................................................... 26 ABOUT US...............................................................................................................................................26 Copyright © 20122025 , Chengdu Ebyte Electronic Technology Co., Ltd. 2 Chengdu Ebyte Electronic Technology Co., Ltd. Disclaimer E22-xxxT37S User Manual 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.es-ebyte.com. Copyright © 20122025 , Chengdu Ebyte Electronic Technology Co., Ltd. 3 Chengdu Ebyte Electronic Technology Co., Ltd. 1 Product Overview E22-xxxT37S User Manual 1.1 Product Introduction E22-xxxT37S is a new generation of LoRa wireless data transmission module. This series (UART) module is developed based on SEMTECH high-performance RF chip . Its maximum transmission power is 37 dBm, with multiple transmission modes, working frequency bands in 230 band and 400 band , LoRa spread spectrum technology, TTL level output, and supports 4.5V - 15V wide voltage power supply. E22-xxxT37S adopts the new generation of LoRa spread spectrum technology, supports air wake-up, wireless configuration, carrier monitoring, automatic relay, communication key and other functions, supports packet length setting, and can provide customized development services . The following two products only have different frequency bands and the same package size. 1.2 Features Adopting the new LoRa spread spectrum modulation technology, it brings a longer communication distance and stronger anti-interference ability; Supports automatic relay networking, multi-level relay is suitable for ultra-long-distance communication , and multiple networks can run simultaneously in the same area; Supports users to set communication keys by themselves, which cannot be read, greatly improving the confidentiality of user data; Supports LBT function, which monitors the channel environment noise before sending, and can greatly improve the communication success rate of the module in harsh environments; Supports RSSI signal strength indication function to evaluate signal quality and improve communication network; Supports wireless parameter configuration, remotely configure or read wireless module parameters by sending command data packets wirelessly; Supports wake-up on the air, an ultra-low power consumption feature suitable for battery-powered applications; Supports fixed-point transmission, broadcast transmission, and channel monitoring; Supports deep sleep in the full power supply range, and the power consumption of the whole machine is less than 10uA in this mode; Supports the global license-free ISM 433MHz frequency band and the 470MHz meter reading frequency band; Supports wireless meter reading frequency band 230MH band; Copyright © 20122025 , Chengdu Ebyte Electronic Technology Co., Ltd. 4 Chengdu Ebyte Electronic Technology Co., Ltd. E22-xxxT37S User Manual 20 km under ideal conditions ; The parameters are saved when power is off, and the module will work according to the set parameters after power is turned on again; Efficient watchdog design, once an abnormality occurs, the module will automatically restart and continue to work according to the previous parameter settings; Supports data transmission rates of 2.4kbps to 62.5 kbps; Supports 4.5 ~ 1.5 V wide voltage power supply, and can guarantee 37dBm power output in the full power supply range; Industrial-grade standard design, supports long-term use at -40+85; The maximum module power can reach 5W (37dBm), and the transmission is farther and more stable. The module has built-in undervoltage and overvoltage warning functions and a built-in warning LED. The module has a built-in over-temperature protection function, which will automatically stop sending when the maximum temperature of the module is exceeded. A matrix pad is reserved at the bottom of the module to facilitate heat dissipation for secondary development. 1.3 Application Scenario Home security alarm and remote keyless entry; Smart home and industrial sensors, etc. Wireless alarm security system ; Building automation solutions; Wireless industrial remote control; Healthcare products; Advanced Metering Infrastructure (AMI ); Automotive industry applications. Copyright © 20122025 , Chengdu Ebyte Electronic Technology Co., Ltd. 5 Chengdu Ebyte Electronic Technology Co., Ltd. 2 Specifications E22-xxxT37S User Manual 2.1 Limit parameters Main parameters Supply voltage (V) Blocking power (dBm) Operating temperature ( ) Performance Minimum Maximum 4. 5 1 5 - 10 -40 + 85 Remark Exceeding 15 V may permanently burn the module Do not communicate at close range with high-power radio frequency Industrial Grade 2.2 Working Parameters Main parameters Operating voltage (V) Communication level (V) Operating temperature ( ) Working frequency band ( MHz ) Po 5V emission current we (mA) r co nsu 12V emission current mp (mA) tio n Receive current (mA ) Sleep current (uA) Maximum transmit power (dBm) Receiving sensitivity (dBm) Air data rate (bps) Reference distance Performance Minimu Typical Maximu m Value m 4. 5 5 ~ 12V 15 - 3. 3 - -40 - 85 410.125 - 493.125 220.125 - 236.125 2900 3100 3300 900 1100 1300 - 36 - 125 0.3 k 43 2 37 - 126 2.4k 20 km - 37.5 - 127 62.5k Remark 5 V can guarantee output power, the lower the voltage, the greater the supply current Using 5V level may cause burnout risk, so a level conversion circuit is required Industrial-grade design Applicable to E22-400T37S, supports ISM band Applicable to E22-230T37S, supports 230MHz meter reading frequency band Tested under 50 ohm impedance. Impedance mismatch may result in excessive current. When using 5V power supply, please provide a power supply with at least 3.5A output. Tested under 50 ohm impedance. Impedance mismatch may cause excessive current. When using 12V power supply, please provide a power supply with at least 1.5A output @DC 12V power supply Software shutdown - Air data rate 2.4 kbps User programmable control Clear and open air, antenna gain 5dBi, antenna height 2.5 meters, air data rate 2.4kbps. Copyright © 20122025 , Chengdu Ebyte Electronic Technology Co., Ltd. 6 Chengdu Ebyte Electronic Technology Co., Ltd. TX length Cache capacity Modulation Communication interface Packaging Interface Dimensions RF Interface 240 Bytes 1000 Byte LoRa UART Serial Port SMD 2.54mm stamp hole 50*30.9mm IPEX generation /stamp hole E22-xxxT37S User Manual The command can be set to send packets of 32/64/128/240 bytes - New generation LoRa modulation technology TTL level ±0.1mm Characteristic impedance is about 50 ohms 3 Mechanical dimensions and pin definitions Serial number 1 2 3 4 5 6 Pinout GND GND VCC VCC RESET AUX Pin Direction Input Input Input Input Input Output Remark Module ground wire Module ground wire Module power positive reference, voltage range: 4.5 ~ 15 V DC Module power positive reference, voltage range: 4.5 ~ 15 V DC Module reset pin Used to indicate the working status of the module; the user wakes up the external MCU, and outputs a Copyright © 20122025 , Chengdu Ebyte Electronic Technology Co., Ltd. 7 Chengdu Ebyte Electronic Technology Co., Ltd. E22-xxxT37S User Manual low level during the power-on self-test initialization period ; (can be left floating) 7 TXD Output TTL serial port output, connected to external RXD input pin; 8 RxD Input TTL serial port input, connected to external TXD output pin; Cooperate with M0 to determine the 4 working modes of the module (cannot be left floating, can be 9 M1 Input (very weak pull-up) grounded if not used) Cooperate with M1 to determine the 4 working modes of the module (cannot be left floating, can be 10 M0 Input (very weak pull-up) grounded if not used) 11 GND Input Module ground wire 12 GND Input Module ground wire 13 ANT Output Antenna interface (high frequency signal output, 50 ohm characteristic impedance) 14 GND Input Module ground wire 15 GND Input Module ground wire 16 GND Input Module ground wire 17 GND Input Module ground wire 18 GND Input Module ground wire 19 GND Input Module ground wire 20 STATE Output Module status indication output, if not used, just leave it unconnected 21 NC - No need to care, floating 22 NC - No need to care, floating 23 NC - No need to care, floating 24 NC - No need to care, floating 25 NC - No need to care, floating 26 NC - No need to care, floating 27 GND Input Module ground wire 28 NC - Floating The bottom of the module is reserved with matrix solder pads. Users need to ground them to assist in 29 NC - the heat dissipation of the module. For detailed dimensions, please refer to the PCB packaging diagram in the relevant download section of the Ebyte official website. Note: The module must be connected to a 50 ohm impedance antenna when sending. No-load transmission may cause permanent damage to the module!!! Copyright © 20122025 , Chengdu Ebyte Electronic Technology Co., Ltd. 8 Chengdu Ebyte Electronic Technology Co., Ltd. 4 Recommended connection diagram E22-xxxT37S User Manual Serial number Brief connection instructions between the module and the MCU (the above figure takes the STM8L MCU as an example) 1 The wireless serial port module is TTL level, please connect it to the TTL level MCU . 2 When using a 5V microcontroller, please perform level conversion. 3 A capacitor of no less than 47uF needs to be added to the power input end, and the capacitor ESR should be as low as possible to increase the stability of the module. 4 Power protection devices can be added according to actual needs. Copyright © 20122025 , Chengdu Ebyte Electronic Technology Co., Ltd. 9 Chengdu Ebyte Electronic Technology Co., Ltd. 5. Functional Details 5.1 Fixed - point transmission E22-xxxT37S User Manual 5.2 Broadcast transmission Copyright © 20122025 , Chengdu Ebyte Electronic Technology Co., Ltd. 10 Chengdu Ebyte Electronic Technology Co., Ltd. 5.3 Broadcast Address E22-xxxT37S User Manual For example: Set the module A address to 0xFFFF and the channel to 0x04. When module A is used as a transmitter (same mode, transparent transmission), all receiving modules under channel 0x04 can receive data, thus achieving the purpose of broadcasting. 5.4 Listening address For example: Set the module A address to 0xFFFF and the channel to 0x04. When module A is used as a receiver, it can receive all the data under channel 0x04 to achieve the purpose of monitoring. 5.5 Module Reset After the module is powered on, AUX will immediately output a low level, perform a hardware self-check, and set the working mode according to user parameters; During this process, AUX maintains a low level. After completion, AUX outputs a high level and starts working normally according to the working mode composed of M1 and M0. Therefore, the user needs to wait for the AUX rising edge as the starting point for the module to work normally. 5.6 AUX Detailed Explanation AUX is used for wireless transceiver buffer indication and self-test indication. It indicates whether the module has data that has not been transmitted wirelessly, or whether the received wireless data has not been sent out through the serial port, or the module is in the process of initializing self-test. 5.6.1 Serial port data output indication Used to wake up the external MCU in sleep mode; Copyright © 20122025 , Chengdu Ebyte Electronic Technology Co., Ltd. 11 Chengdu Ebyte Electronic Technology Co., Ltd. E22-xxxT37S User Manual 5.6.2 Wireless transmission indication Buffer empty: data in the internal 1000-byte buffer are all written to the wireless chip (automatically divided into packets) ; When AUX=1, the user can continuously send data less than 1000 bytes without overflow ; When AUX=0, the buffer is not empty: the data in the internal 1000-byte buffer has not been fully written to the wireless chip and the transmission has not yet started. At this time, the module may have timed out waiting for the end of user data, or is transmitting wireless packets . Note: When AUX=1, it does not mean that all serial port data of the module has been transmitted wirelessly. It is also possible that the last packet of data is being transmitted. 5.6.3 The module is being configured Only when resetting and exiting sleep mode; 5.6.4 Notes Serial number AUX Notes For the above functions 1 and 2, the output low level is given priority, that is, if any output low level condition is met, 1 AUX will output low level; When all low-level conditions are not met, AUX outputs a high level. When AUX outputs a low level, it means the module is busy and no working mode detection will be performed at this 2 time; When the module AUX outputs a high level within 1ms, the mode switching will be completed. Copyright © 20122025 , Chengdu Ebyte Electronic Technology Co., Ltd. 12 Chengdu Ebyte Electronic Technology Co., Ltd. E22-xxxT37S User Manual After the user switches to a new working mode, the module will not actually enter this mode until at least 2ms after the 3 AUX rising edge. If AUX is always at a high level, the mode switch will take effect immediately. 4 When the user enters other modes from mode 3 (sleep mode) or during the reset process, the module will reset the user parameters, during which AUX outputs a low level. Due to the characteristics of the LoRa modulation method, the information transmission delay is much longer than that 5 of FSK. It is recommended that customers do not transmit large amounts of data at low airspeeds to avoid data loss and communication abnormalities caused by data accumulation. 5.7 Detailed explanation of abnormal working status log printing 1. The S T ATE indicator light/status indication pin will flash/level according to the specific abnormal working status according to the table below. Abnormal working Threshold for judging Indicator light status abnormal status flashing Undervoltage Supply voltage <4.5V Flash once every 500ms/level flip Overpressure Supply voltage>15V Flash once every 1s/level flip Overheat Module temperature>120°C Flashes once every 2s/level flips Overpressure and Supply voltage>15V and module Always on overheating temperature>120°C 2. The module will temporarily shut down the RF transmission function when it is in an abnormal working state, and will restart the transmission after it returns to normal working state. 3. The module will print a cyclic log every 500ms (can be turned on/off) in an abnormal state to inform the user of the current abnormal working state. The print log format is shown in the table below: Abnormal working status Print log format Undervoltage FF FF FF 01 Overpressure FF FF FF 02 overheat FF FF FF 03 Overpressure and overheating FF FF FF 04 Exception log printing enable bit ( bit 2 of instruction register 0 4H ) 0: Disable 1: Enable The default value is 0 (disabled) Copyright © 20122025 , Chengdu Ebyte Electronic Technology Co., Ltd. 13 Chengdu Ebyte Electronic Technology Co., Ltd. E22-xxxT37S User Manual 6 Working Mode The module has four working modes, which are set by pins M1 and M0; the details are shown in the following table: Mode (0-3) M1 M0 Mode Introduction Remark 0 Transfer Mode 0 0 Serial port open, wireless open, transparent transmission Support special command air configuration 1 WOR mode 0 1 Can be defined as WOR sender and WOR receiver Support air wake-up 2 Configuration Mode 1 0 Users can access the registers through the serial port to control the working status of the module 3 Deep Sleep 1 1 The module enters sleep mode 6.1 Mode Switching SN Remark The user can combine M1 and M0 with high and low levels to determine the module working mode. The MCU's two GPIOs can be used to control the mode switching; After changing M1 and M0: if the module is idle, it can start working in the new mode after 1ms; If the module has serial port data that has not been transmitted wirelessly, it can enter a new working mode only after 1 the transmission is completed; If the module receives wireless data and sends data out through the serial port, it needs to finish sending before entering the new working mode; Therefore, mode switching is only effective when AUX output is 1, otherwise the switching will be delayed. For example, if a user continuously inputs a large amount of data and switches modes at the same time, the mode switching operation is invalid. The module will only detect a new mode after processing all user data. 2 Therefore, the general recommendation is: detect the output status of the AUX pin and wait for 2ms after the output is high before switching. When the module is switched from other modes to sleep mode, if there is data that has not been processed; The module will enter sleep mode only after processing these data (including receiving and sending). This feature can be used for fast sleep, thus saving power consumption; for example: the transmitting module works in mode 0, the user 3 initiates the serial port data "12345", and then there is no need to wait for the AUX pin to be idle (high level), it can directly switch to sleep mode and put the user's main MCU to sleep immediately. The module will automatically send all the user data wirelessly and automatically enter sleep within 1ms; This saves MCU working time and reduces power consumption. Similarly, any mode switching can use this feature. After the module processes the current mode event, it will automatically enter the new mode within 1ms, thus eliminating the need for users to query AUX and achieving the 4 purpose of fast switching. For example, switching from transmit mode to receive mode; the user MCU can also enter sleep mode in advance before the mode switch, and use the external interrupt function to obtain AUX changes to switch the mode. This operation mode is very flexible and efficient, designed entirely according to the operational convenience of the 5 user's MCU, and can reduce the workload of the entire system as much as possible, improve system efficiency, and reduce power consumption. Copyright © 20122025 , Chengdu Ebyte Electronic Technology Co., Ltd. 14 Chengdu Ebyte Electronic Technology Co., Ltd. 6.2 Normal mode (mode 0 ) E22-xxxT37S User Manual Type When M0 = 0, M1 = 0, the module works in mode 0 Transmitting The user can input data through the serial port, and the module will start wireless transmission. Receiving The module's wireless receiving function is turned on, and after receiving wireless data, it will be output through the serial port TXD pin. 6.3 WOR mode (mode 1) Type Transmitting Receiving When M0 = 1, M1 = 0, the module works in mode 1 When defined as a transmitter, a wake-up code will be automatically added for a certain period of time before transmission. Data can be received normally, and the receiving function is equivalent to mode 0 6.4 Configuration mode (mode 2 ) Type When M0 = 0, M1 = 1, the module works in mode 2 Transmitting Wireless Transmit Off Receiving Wireless reception off Configuration Users can access registers to configure module operating status 6.5 Deep sleep mode (mode 3 ) Type Transmitting Receiving Notice When M0 = 1, M1 = 1, the module works in mode 3 Unable to transmit wireless data. Unable to receive wireless data. When entering other modes from sleep mode, the module will reconfigure parameters. During the configuration process, A UX remains at a low level. After completion, it outputs a high level, so it is recommended that users detect the rising edge of AUX. Copyright © 20122025 , Chengdu Ebyte Electronic Technology Co., Ltd. 15 Chengdu Ebyte Electronic Technology Co., Ltd. 7 Register read and write control E22-xxxT37S User Manual 7.1 Instruction format Configuration mode (mode 2: M1=1, M0=0 ), the supported command list is as follows ( when setting, only 9600, 8N1 format is supported ): Seri al num Instruction Format ber Detailed description Instruction: C0+starting address+length+parameter Response: C1+starting address+length+parameters Example 1: Configure the channel to 0x09 Instruction start address length parameter 1 Setting Registers Send: C0 05 01 09 Return: C1 05 01 09 Example 2: Configure module address (0x1234), network address (0x00), serial port (9600 8N1), and airspeed ( 2.4K ) at the same time Send: C0 00 04 12 34 00 61 Return: C1 00 04 12 34 00 61 Instruction: C1+starting address+length Response: C1+starting address+length+parameters Example 1: Reading a channel Instruction start address length parameter 2 Read Register Send: C1 05 01 Return: C1 05 01 09 Example 2: Read module address, network address, serial port, and airspeed simultaneously Send: C1 00 04 Return: C1 00 04 12 34 00 61 Instruction: C2 + starting address + length + parameter Response: C1 + start address + length + parameter Example 1: Configure the channel to 0x09 Instruction start address length parameter 3 Setting up temporary Send: C2 05 01 09 registers Return: C1 05 01 09 Example 2: Configure module address (0x1234), network address (0x00), serial port (9600 8N1), and airspeed ( 2.4K ) at the same time Send: C2 00 04 12 34 00 61 Return: C1 00 04 12 34 00 61 Instruction: CF CF + regular instruction Response: CF CF + normal response Example 1: The wireless configuration channel is 0x09 Wireless command header command start address length parameter 5 Wireless Configuration Send: 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), airspeed ( 2.4K ) Send: CF CF C0 00 04 12 34 00 61 Return: CF CF C1 00 04 12 34 00 61 Copyright © 20122025 , Chengdu Ebyte Electronic Technology Co., Ltd. 16 Chengdu Ebyte Electronic Technology Co., Ltd. 6 Format Error Format Error Response FF FF FF E22-xxxT37S User Manual 7.2 Register Description Serial number 00H 01H 02H 0 3H Read and Writ e Read/ Write Read/ Write Read/ Write Read/ Write Name ADDH ADDL NETI D REG0 Describe ADDH (default 0) ADDL (default 0) NETID (default 0) 7 6 5 UART serial port rate (bps) 0 0 0 The serial port baud rate is 1200 0 0 1 The serial port baud rate is 2400 0 1 0 The serial port baud rate is 4800 The serial port baud rate is 9600 0 1 1 (default) The serial port baud rate is 1 0 0 19200 The serial port baud rate is 1 0 1 38400 The serial port baud rate is 1 1 0 57600 The serial port baud rate is 1 1 1 115200 4 3 Serial port check digit 0 0 8 N1 (default) 0 1 8 O1 1 0 8 E1 1 1 8 N1 (equivalent to 0 0 ) Wireless air rate (bps) 2 1 0 E22-400T37S E22-230T37S 0 0 0 Air rate 2.4k Air rate 2.4k Air speed 0 0 1 Air speed 2.4k 2.4k Remark Module address high byte and low byte ; Note: When the module address is equal to FFFF, it can be used as a broadcast and monitoring address, that is, the module will not perform address filtering at this time Network address, used to distinguish networks ; When communicating with each other, they should be set to the same. The two modules that communicate with each other can have different serial port baud rates and verification methods ; When transmitting large data packets continuously, users need to consider data blocking or even data loss caused by the same baud rate ; It is generally recommended that both parties in communication have the same baud rate. The serial port modes of the two communicating parties can be different ; The air rate of both communicating parties must be the same ; air rate, the smaller the delay and the shorter the transmission distance. Copyright © 20122025 , Chengdu Ebyte Electronic Technology Co., Ltd. 17 Chengdu Ebyte Electronic Technology Co., Ltd. E22-xxxT37S User Manual Air rate 2.4k Air speed 0 1 0 (default) 2.4k Air rate 2.4k 0 1 1 Air speed 4.8k (default) Air speed 1 0 0 Air speed 9.6k 4.8k Air speed 1 1 0 1 9.2k Air speed 9.6k Air speed 38.4 Air speed 1 1 0 k 15.6 k Air speed 62.5 Air speed 1 1 1 k 15.6 k 7 6 Subcontracting settings 0 0 2 40 bytes (default) 0 1 1 28 bytes The data sent by the user is smaller than the packet length, and the serial port output at the receiving end appears as uninterrupted continuous output ; 1 0 6 4 bytes 1 1 3 2 bytes If the data sent by the user is larger than the packet length, the receiving serial port will output it in packets. 5 RSSI Ambient Noise Enable 0 Disabled (default) 1 Enable 0 4H Read/ REG1 Write 4 3 reserve Enable command (packet setting, transmit power as default parameters, configuration mode): C0 04 01 20 ; After enabling, you can send instructions C0 C1 C2 C3 in transfer mode or WOR send mode to read registers ; Register 0x00: Current ambient noise RSSI ; Register 0X01: RSSI when receiving data last time (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; such as: send C0 C1 C2 C3 00 01 Return C1 00 01 RSSI (address can only start from 00 ) Print logs in different formats 2 Enable abnormal working status log printing according to different abnormal 0 Disabled (default) working status. For details, see Chapter 1 Enable 5.7 , Detailed Explanation of Printing Logs in Abnormal Working Status. 1 0 Transmit power 0 0 37 dBm ( default) 0 1 37 dBm This module has no power levels 1 0 37 dBm 1 1 37 dBm Read/ Channel control (CH) Actual frequency = 220.125 + CH 0 5H Write REG2 0-64 represent a total of 65 channels (applicable to *0.25M Actual frequency = 410.125 + CH * Copyright © 20122025 , Chengdu Ebyte Electronic Technology Co., Ltd. 18 Chengdu Ebyte Electronic Technology Co., Ltd. E22-xxxT37S User Manual 230 frequency band) 0-83 represent a total of 84 channels (applicable to 400 frequency band) 7 Enable RSSI Byte 0 Disabled (default) 1 Enable 6 Transmission method 0 Transparent transmission (default) 1 Fixed-point transmission 5 Relay function 0 Disable relay functionality (default) 1 Enable relay function 4 L BT Enable 0 Disabled (default) 1M After enabling, the module receives wireless data and outputs it through the serial port TXD, followed by an RSSI strength byte. The current data packet RSSI is: dBm = -(256 - RSSI) During fixed-point transmission, the module will recognize the first three bytes of serial port data as: address high + address low + channel, and use it as the wireless transmission target. After the relay function is enabled, if the destination address is not the module itself, the module will initiate a forwarding ; To prevent data from being transmitted back, it is recommended to use it in conjunction with fixed-point mode ; that is, the target address and source address are different. When enabled, wireless data will be monitored before transmission, which can avoid interference to a certain extent, but may cause data delays ; 1 Enable The maximum stay time of LBT is 2 seconds, and it will be forcibly issued Read/ 0 6H REG3 Write 3 WOR mode transceiver control W OR Receiver (Default) after 2 seconds. Only valid for mode 1; 1. In the receiving mode of wor, the Working in WOR monitoring mode, the 0 monitoring cycle is shown below (WOR module can modify the delay time after wake-up, the default time is 0; 2. The receiving end needs to send the cycle), which can save a lot of power consumption. command C0 09 02 03 E8 in the configuration mode (C0 is the write command, 09 is the register start W OR transmitter address, 02 is the length, 03 E8 is the set delay, the maximum FFFF is 1 The module is turned on for transmission and reception, and a wake-up code is added for a 65535ms, and setting it to 0 turns off the wake-up delay.) 3. Data can be sent within the delay certain period of time when transmitting data. 2 1 0 WOR Cycle 0 0 0 500 ms 0 0 1 1000 ms 0 1 0 1500 ms 0 1 1 2000 ms 1 0 0 2500 ms 1 0 1 3000 ms 1 1 0 3500 ms 1 1 1 4000 ms Only valid for mode 1; Period T = ( 1+WOR ) *500ms , maximum 4000ms , minimum 500ms ; The longer the WOR monitoring interval is, the lower the average power consumption is, but the greater the data delay is; The sender and receiver must be consistent (very important) 0 7H Write CRYP T_H Key high byte (default 0) 0 8H Write CRYP T_L Key low byte (default 0) Write only, read returns 0 ; Used for encryption to prevent wireless data from being intercepted by similar modules ; Copyright © 20122025 , Chengdu Ebyte Electronic Technology Co., Ltd. 19 Chengdu Ebyte Electronic Technology Co., Ltd. 8 0H 8 read 6H PID Product information 7 bytes E22-xxxT37S User Manual The module will use these two bytes as calculation factors to transform and encrypt the wireless signal in the air. Product information 7 bytes 7.3 Factory default parameters Model Module Model E22-400T37S E22-230T37S Frequency 433.125MH z 230.125MH z Address 0x0000 0x0000 Factory default parameter values Channel Air speed Baud rate 0x17 2.4kbps 9600 0x28 2.4kbps 9600 Serial port format 8N1 Trans mit power 37dbm 8N1 37dbm 8 Relay Network Mode Usage Serial numb er Relay Mode Description 1 After setting the relay mode through the configuration mode, switch to the general mode and the relay starts working. In relay mode, ADDH and ADDL are no longer used as module addresses, but are forwarded and paired with NETID respectively. If a 2 signal is received from one network, it will be forwarded to the other network . The repeater's own network ID is invalid. 3 In the relay mode, the relay module cannot send and receive data and cannot perform low-power operation. 4 When the user enters other modes from mode 3 (sleep mode) or during the reset process, the module will reset the user parameters, during which AUX outputs a low level. Relay networking rules: 1Forwarding rules, the relay can forward data bidirectionally between two NETIDs. 2In relay mode, ADDH\ADDL is no longer used as the module address, but as NETID for forwarding pairing. As shown in the figure: First -level relay "Node 1" NETID is 08. "Node 2" NETID is 33. The ADDH\ADDL of relay 1 are 08 and 33 respectively. So the signal sent by node 1 (08) can be forwarded to node 2 (33) At the same time, the addresses of node 1 and node 2 are the same, so the data sent by node 1 can be received by node 2. Secondary relay Copyright © 20122025 , Chengdu Ebyte Electronic Technology Co., Ltd. 20 Chengdu Ebyte Electronic Technology Co., Ltd. E22-xxxT37S User Manual The ADDH\ADDL of relay 2 are 33, 05 respectively. So relay 2 can forward the data of relay 1 to network NETID:05. Therefore, nodes 3 and 4 can receive data from node 1. Node 4 outputs data normally, but node 3 does not output data because its address is different from that of node 1. Two -way relay As shown in the configuration figure: the data sent by node 1 can be received by nodes 2 and 4, and the data sent by nodes 2 and 4 can also be received by node 1. 9 Host computer configuration instructions The figure below shows the E22-xxxT37S configuration host computer display interface. Users can switch to command mode through M0 and M1 to quickly configure and read parameters on the host computer. Copyright © 20122025 , Chengdu Ebyte Electronic Technology Co., Ltd. 21 Chengdu Ebyte Electronic Technology Co., Ltd. E22-xxxT37S User Manual In the configuration host computer, the module address, frequency channel, network ID, and key are all displayed in decimal mode; the value range of each parameter is: Network address: 0-65535 Frequency channel: 083 ( 0 64 for E22-230T37S ) Network ID: 0-255 Key: 0-65535 When users use the host computer to configure the relay mode, they need to pay special attention to the fact that since the parameters in the host computer are displayed in decimal mode, the module address and network ID need to be converted when filling in the decimal system. If the network ID input by the transmitter A is 02 and the network ID input by the receiver B is 10, when the relay R sets the module address, the hexadecimal value 0X020A is converted to the decimal value 522 as the module address filled in by the relay R; That is, the module address value that needs to be filled in at the relay end R is 522. 10 Hardware Design It is recommended to use a DC regulated power supply to power the module. The power supply ripple coefficient should be as small as possible and the module should be reliably grounded. Please pay attention to the correct connection of the positive and negative poles of the power supply. Reverse connection will directly cause permanent damage to the module. It is recommended to add an anti-reverse connection circuit in the design. Please check the power supply to ensure that it is within the recommended power supply voltage. If it exceeds the maximum value, the module will be permanently damaged. Please check the stability of the power supply. The voltage should not fluctuate greatly or frequently. When designing the power supply circuit for the module, it is often recommended to retain more than 30% margin, which is Copyright © 20122025 , Chengdu Ebyte Electronic Technology Co., Ltd. 22 Chengdu Ebyte Electronic Technology Co., Ltd. E22-xxxT37S User Manual conducive to long-term stable operation of the whole machine; The module should be kept as far away as possible from parts with large electromagnetic interference, such as power supplies, transformers, and high-frequency wiring; High-frequency digital routing, high-frequency analog routing, and power routing must avoid the bottom of the module. If it is necessary to pass under the module, assuming that the module is soldered on the Top Layer, ground copper should be laid on the Top Layer of the module contact part (all copper should be laid and well grounded), and it must be close to the digital part of the module and routed on the Bottom Layer ; Assuming the module is soldered or placed on the Top Layer, it is also wrong to randomly route the wires on the Bottom Layer or other layers, which will affect the module's spurious signal and receiving sensitivity to varying degrees ; If there are devices with large electromagnetic interference around the module, it will also greatly affect the performance of the module. It is recommended to keep them away from the module according to the intensity of the interference. If possible, appropriate isolation and shielding can be performed. If there are traces with large electromagnetic interference around the module (high-frequency digital, high-frequency analog, power traces), it will also greatly affect the performance of the module. It is recommended to keep them away from the module according to the intensity of the interference. If possible, appropriate isolation and shielding can be performed. If the communication line uses 5V level, a 1k-5.1k resistor must be connected in series (not recommended, there is still a risk of damage) ; The antenna installation structure has a great impact on the module performance. Make sure the antenna is exposed and preferably vertically upward; When the module is installed inside the case, you can use a high-quality antenna extension cable to extend the antenna to the outside of the case; The antenna must not be installed inside a metal shell, as this will greatly reduce the transmission distance. 11 FAQ 11.1 The transmission distance is not ideal When there is a straight-line communication obstacle, the communication distance will be attenuated accordingly ; Temperature, humidity, and co-channel interference can increase the communication packet loss rate ; The ground absorbs and reflects radio waves, so the test results are poor when close to the ground ; Seawater has a strong ability to absorb radio waves, so the test effect at the seaside is poor ; If there are metal objects near the antenna, or the antenna is placed in a metal shell, the signal attenuation will be very serious ; The power register is set incorrectly, or the air rate is set too high (the higher the air rate, the closer the distance) ; The power supply voltage at room temperature is lower than the recommended value. The lower the voltage, the lower the power output . The antenna used does not match the module well or the antenna itself has quality issues. Copyright © 20122025 , Chengdu Ebyte Electronic Technology Co., Ltd. 23 Chengdu Ebyte Electronic Technology Co., Ltd. 11.2 Modules are vulnerable to damage E22-xxxT37S User Manual Please check the power supply to ensure that it is within the recommended power supply voltage. If it exceeds the maximum value, the module will be permanently damaged . Please check the stability of the power supply. The voltage should not fluctuate greatly or frequently . Please ensure anti-static operation during installation and use, as high-frequency components are sensitive to static electricity ; Please ensure that the humidity is not too high during installation and use, as some components are humidity sensitive devices ; If there is no special requirement, it is not recommended to use it at too high or too low temperature. 11.3 Bit Error Rate Too High There is interference from the same frequency signal nearby. Stay away from the interference source or change the frequency or channel to avoid interference. An unsatisfactory power supply may also cause garbled characters, so the reliability of the power supply must be ensured; Extension cables or feeder cables that are of poor quality or are too long can also cause a high bit error rate. 12 Welding Operation Instructions 12.1 Reflow Temperature Reflow profile characteristics Minimum temperature Preheating /keeping ( Tsmin ) Maximum temperature (T smax ) Leaded process assembly 100 150 Lead-free assembly 150 200 Time (T smin ~T smin ) 60-120 seconds 60-120 seconds Heating slope (T L ~T p ) Liquidus temperature ( TL ) T L above the holding time Package peak temperature Tp The time (T p ) within 5°C of the specified classification temperature (Tc ) is shown in the figure below. Cooling slope (T p ~T L ) Time from room temperature to peak 3/sec, max. 183 60~ 90 seconds Users must not exceed the temperature stated on the product's "Moisture Sensitivity" label. 3/sec, max. 217 60~ 90 seconds Users must not exceed the temperature stated on the product's "Moisture Sensitivity" label. 20 seconds 30 seconds 6/sec, max. 6 minutes, longest 6/sec, max. 8 minutes, longest Copyright © 20122025 , Chengdu Ebyte Electronic Technology Co., Ltd. 24 Chengdu Ebyte Electronic Technology Co., Ltd. E22-xxxT37S User Manual temperature The peak temperature (Tp) tolerance of the temperature curve is defined as the upper limit of the user 12.2 Reflow Oven Curve 13 Related models Product Model E22-400T22S E22-400T22D E22-400T30S E22-400T30D E22-900T22S E22-900T22D Frequency Hz 433/470M 433/470M 433/470M 433/470M 868/915M 868/915M Transmit power dBm 22 22 30 30 22 22 Test distance km 5 5 10 10 5 5 Package SMD DIP SMD DIP SMD DIP Product size mm 16*26 21*36 20*40.5 24*43 16*26 21*36 Communicatio n interface UART UART UART UART UART UART Copyright © 20122025 , Chengdu Ebyte Electronic Technology Co., Ltd. 25 Chengdu Ebyte Electronic Technology Co., Ltd. E22-900T30S 868/915M 30 E22-900T30D 868/915M 30 E22-400T33D 433/470M 33 E22-xxxT37S User Manual 10 SMD 20*40.5 UART 10 DIP 24*43 UART 12 DIP 37*60 UART Revision History Version 1.0 1. 1 1. 2 1. 3 1.4 Revision Date 2022-12-5 202 3 - 07 - 24 202 3 - 09 - 13 202 3 - 09 - 20 2025-4-22 Revision Notes Initial release Error Correction Error Correction Error Correction Model Merge Maintainer Yan Bin Bin Bin Hao About us Technical support: support@cdebyte.com Documents and RF Setting download link: www.es-ebyte.com Thank you for using Ebyte products! Please contact us with any questions or suggestions: info@cdebyte.com ------------------------------------------------------------------------------------------------Web: www.es-ebyte.com Address: , Building B5, Mould Industrial Park, 199# Xiqu Ave, High-tech Zone, Chengdu, 611731, Sichuan, China Copyright © 20122025 , Chengdu Ebyte Electronic Technology Co., Ltd. 26Microsoft Word 2021 Microsoft Word 2021