1. Introduction and Overview
The EBYTE E32-900T30S is a high-power, long-range wireless serial port module operating at 868MHz. It utilizes Semtech's LoRa spread spectrum technology, offering excellent anti-interference capabilities and high sensitivity for extended communication distances up to 8000 meters. This module is designed for transparent data transmission and is equipped with a wireless wake-up function, contributing to longer battery life in applications. It operates at TTL level and is suitable for various industrial and IoT applications.
Video 1: Overview of the EBYTE E32-900T30S LoRa module, highlighting its features and specifications.
Figure 1: Front view of the EBYTE E32-900T30S LoRa Wireless Module.
2. Features
- LoRa Spread Spectrum Technology: Enhances anti-interference and sensitivity for longer communication distances.
- Long Range: Capable of transmitting data up to 8000 meters.
- Air Wake-up Function: Supports WOR (Wake On Radio) mode for reduced power consumption and extended battery life.
- Temperature-Compensation Crystal Oscillator: Ensures stable module frequency operation in harsh industrial environments with high and low temperatures (-40°C to 80°C).
- Three Anti-Treatment: The module is finished with a protective coating that forms a soft rubber after curing, providing hardy, heat-resistant, moisture-proof, dust-proof, and acid/alkali-resistant properties.
- Forward Error Correction (FEC): Proactively corrects disturbed data packets, greatly improving communication reliability and transmission distance.
- Dual Watchdogs: Equipped with dual watchdogs for enhanced device security and stability, restarting in 0.107s upon exception and continuing operation according to original parameter settings.
- UART Interface: Standard UART serial communication for easy integration.
Figure 2: Key functional features and certifications of the E32-900T30S module.
Figure 3: Comparison illustrating the stability provided by the temperature-compensation crystal oscillator.
Figure 4: Explanation of the module's three anti-treatment for enhanced durability.
Figure 5: Diagram illustrating the benefits of LoRa Spread Spectrum technology in overcoming interference and obstacles.
3. Specifications
| Attribute | Value |
|---|---|
| Brand Name | EBYTE |
| Model | E32-900T30S |
| Type | Wireless Serial Port Module (LoRa RF Module) |
| Origin | Mainland China |
| Condition | New |
| Size | 25 x 40.3 mm (approx. 25 x 40.5 mm) |
| Weight | 5.6 ± 0.1 g |
| Working Frequency | 868MHz (862-930MHz band) |
| Transmission Distance | Up to 8000m (8km) |
| Transmitting Power | 30dBm (1W) |
| Antenna Type | SMA-K / IPEX / Stamp Hole |
| Interface | UART (TTL level) |
| Voltage | 5.0 V (Operating range: 3.3 - 5.2 V) |
4. Pinout and Dimensions
The E32-900T30S module features a stamp hole design for easy integration into various PCB layouts. Below is the detailed pinout and module dimensions.
Figure 6: E32-900T30S module dimensions and pin assignments.
| No. | Name | Direction | Function |
|---|---|---|---|
| 1 | GND | - | Module ground |
| 2 | VCC | Input | The module power supply is positively referenced, and the voltage range: 3.3V ~ 5.2V DC |
| 3 | AUX | Output | Used to indicate the working status of the module; the user wakes up the external MCU, and outputs a low level during power-on self-test initialization. (Can be suspended) |
| 4 | TXD | Output | TTL serial output, connected to external RXD output pin |
| 5 | RXD | Input | TTL serial input, connected to external TXD output pin |
| 6 | M1 | Input (Very weak pull-up) | Cooperate with M0 to determine the 4 working modes of the module (not suspended, if not used, it can be grounded) |
| 7 | M0 | Input (Very weak pull-up) | Cooperate with M1 to determine the 4 working modes of the module (not suspended, if not used, it can be grounded) |
| 11 | ANT | Output | Antenna interface (high frequency signal output, 50 ohm characteristic impedance) |
| 12 | GND | - | Module ground |
| 13-24 | NC | - | NC pin, which needs to be floating (for later expansion) |
| 22 | RESET | Input | Reset pins for program loading (dangling, no need for user to connect) |
5. Operating Modes
The E32-900T30S module supports several operating modes, configurable via the M0 and M1 pins, to optimize for different application requirements such as power consumption and data throughput.
- Transmission Mode: Standard transparent transmission, the most common mode for continuous data flow.
- WOR (Wake On Radio) Mode: Low power consumption mode where the module automatically wakes up upon receiving a specific code.
- Power Saving Mode: A low power function where transmitting is unavailable.
- Deep Sleep Mode: The lowest power consumption mode, with an overall consumption of only 2µA.
The module also supports various transmission types:
- Transparent Transmission:
- Point-to-Point: Sender and receiver exchange data transparently.
- Point to Multiple Points: Sender transmits data transparently to multiple receivers.
- Monitoring: A/B/C are on the same channel, and the address of A is 0xFFFF.
- Fixed Transmission:
- Point-to-Point: Sender targets a specific address and channel with data.
- Point to Multiple Points: Sender transmits to 0xFFFF + target channel + data.
- Monitoring: A/B/C are on the same channel and the address of A is 0xFFFF.
Figure 7: Illustration of the four working modes and various transmission types (transparent and fixed) supported by the module.
6. Setup and Installation
The E32-900T30S is a Surface Mount Device (SMD) module designed for integration into a host PCB. Proper soldering techniques are essential for reliable operation. Refer to the pinout diagram (Figure 6) for correct connections.
6.1 Power Supply
Connect the VCC pin to a stable 3.3V to 5.2V DC power source. Ensure the power supply can provide sufficient current, especially during transmission at 1W output power. Connect all GND pins to the system ground.
6.2 UART Connection
Connect the module's TXD pin to the RXD pin of your microcontroller (MCU) or host device, and the module's RXD pin to the TXD pin of your MCU. Ensure the UART baud rate and other parameters are correctly configured on both ends for communication.
6.3 Antenna Connection
Connect a suitable 868MHz antenna to the ANT pin. The module supports SMA-K, IPEX, or stamp hole antenna types. For optimal performance, use a 50-ohm characteristic impedance antenna. Ensure the antenna is securely connected and positioned for maximum signal strength and range.
6.4 Mode Configuration (M0, M1)
The M0 and M1 pins are used to select the operating mode of the module. These pins should not be left floating. If not used for dynamic mode switching, they can be grounded to select a default mode. Refer to the detailed user manual for specific M0/M1 pin configurations for each operating mode.
6.5 External Resources
For detailed RF settings and comprehensive instructions, please refer to the official documentation:
- RF Setting Guide: http://www.cdebyte.com/pdf-down.aspx?id=1738
- User Manual: http://www.cdebyte.com/pdf-down.aspx?id=1457
7. Operation
Once the module is correctly installed and configured, it operates as a transparent serial port for wireless data transmission. Data sent to the module's RXD pin will be transmitted wirelessly, and data received wirelessly will be output through the TXD pin.
7.1 Transparent Transmission
In this mode, the module acts as a wireless bridge, forwarding all data received via UART over the air and vice-versa, without requiring complex packet formatting from the user. This is ideal for simple data links.
7.2 Fixed Transmission
For applications requiring addressing or specific channel communication, the fixed transmission modes allow the user to specify target addresses and channels. This is useful for networks with multiple modules.
7.3 Low Power Operation
To conserve power, especially in battery-powered applications, utilize the WOR or Deep Sleep modes. The WOR mode allows the module to wake up only when data is detected, significantly reducing average power consumption. Deep Sleep mode offers the lowest power consumption but requires external intervention to wake the module.
8. Maintenance
The E32-900T30S module is designed for durability with its three anti-treatment coating, providing resistance against heat, moisture, dust, acid, and alkali. This reduces the need for frequent maintenance.
- Environmental Protection: While robust, avoid exposing the module to extreme physical shock or prolonged exposure to corrosive chemicals beyond its rated resistance.
- Cleaning: If necessary, gently clean the module with a soft, dry cloth. Avoid using harsh solvents.
- Firmware Updates: Check the EBYTE official website periodically for any firmware updates that may improve performance or add new features.
9. Troubleshooting
If you encounter issues with the E32-900T30S module, consider the following troubleshooting steps:
- No Communication:
- Verify power supply voltage (3.3V-5.2V) and connections.
- Check UART wiring (TXD to RXD, RXD to TXD) and ensure correct baud rate settings.
- Confirm M0 and M1 pins are correctly configured for the desired operating mode and not left floating.
- Ensure both transmitting and receiving modules are set to the same frequency and channel.
- Poor Range/Signal:
- Check antenna connection and ensure it is a 50-ohm 868MHz antenna.
- Ensure the antenna is not obstructed or placed near metallic objects.
- Verify that the module is operating at maximum transmitting power (30dBm) if required.
- Consider environmental factors such as obstacles (buildings, terrain) that may affect LoRa signal propagation.
- Module Instability:
- The module is equipped with dual watchdogs to prevent system stagnation or infinite loops. If an exception occurs, the module will automatically restart.
- Ensure the power supply is stable and free from noise.
For more in-depth troubleshooting, refer to the official user manual linked in Section 6.5.
10. User Tips
No specific user tips were available from provided reviews or Q&A. However, general best practices for LoRa modules include:
- Antenna Placement: Always use an appropriate antenna and ensure it is positioned vertically and in a clear line of sight for optimal range.
- Power Supply Stability: Provide a clean and stable power supply to prevent unexpected behavior, especially for high-power transmission.
- Grounding: Ensure proper grounding of the module and its connections to minimize noise and interference.
- Parameter Configuration: Carefully configure the module's parameters (baud rate, operating mode, frequency, channel) to match your application requirements and ensure compatibility between communicating modules.
11. Applications
The EBYTE E32-900T30S LoRa module is versatile and suitable for a wide range of applications requiring long-range, low-power wireless data transmission. Common applications include:
- Industrial Manufacturing: Remote monitoring, control systems, asset tracking.
- Smart Home: Home automation, security systems, smart metering.
- Internet of Things (IoT): Sensor networks, environmental monitoring, smart agriculture.
- Wireless Meter Reading: Water, gas, and electricity meter data collection.
- Smart City: Street light control, parking management.
- Security Systems: Alarm systems, access control.
Figure 8: Examples of applications for the E32-900T30S LoRa module.
12. Warranty and Support
For product support, technical assistance, or warranty inquiries, please contact EBYTE Official Store directly. Refer to the official EBYTE website for the most up-to-date information and resources.
EBYTE Official Store: https://m.aliexpress.com/store/storeHome.htm?sellerAdminSeq=245814417
