Introduction
The EBYTE E220-900T30D is a high-performance LoRa wireless module designed for long-range, low-power communication. Utilizing the LLCC68 chip from SEMTECH, it operates in the 868MHz and 915MHz global license-free ISM bands, offering robust anti-interference capabilities and extended transmission distances up to 10km. This module is suitable for various applications requiring reliable wireless data transmission, such as smart building systems, wireless meter reading, and industrial control.
Figure 1: EBYTE E220-900T30D LoRa Wireless Module with SMA-K antenna connector.
Key features of the E220-900T30D module include:
- Imported chips for good performance.
- LoRa spread spectrum for long-distance and anti-interference communication.
- Low power design suitable for battery power supply.
- Efficient watchdog for stable operation without downtime.
Figure 2: Overview of the module's core features.
Specifications
The E220-900T30D module features advanced specifications for reliable performance. It utilizes the LLCC68 chip, offering improved performance compared to older SX1278/SX1276 chips.
Figure 3: Performance comparison between LLCC68 and SX1278/SX1276 chips, highlighting improved distance, data rate, and lower sleep power consumption of LLCC68.
Figure 4: Detailed specifications of the E220-900T30D module.
| Main Parameter | Performance | Remarks |
|---|---|---|
| Operating frequency (MHz) | 850.125~930.125 | Support ISM band |
| Power supply (V) | 3~5.5 | Voltage over 5.5V will cause permanent damage to module |
| TX current (mA) | 620 | Instant power consumption |
| RX current (mA) | 17.2 | - |
| Sleep current (µA) | 5 | - |
| Tx power (dBm) | 30 | - |
| Distance for reference (dBm) | 10km | - |
| Size | 24*43mm | - |
| Receiving sensitivity (dBm) | -147 | - |
| Communication level (V) | 3.3 | - |
| Data rate LoRa (bps) | 2.4k~62.5k | - |
| Modulation | LoRa | - |
| Buffer (Byte) | 400 | - |
| Package | DIP | - |
| TX length (Byte) | 200 | - |
| Communication interface | UART | TTL level |
| Antenna | SMA-K | 50 ohm impedance |
Note: The module operates in the 850.125~930.125MHz frequency range, supporting both 868MHz and 915MHz bands. Ensure power supply is within 3-5.5V to prevent permanent damage.
Setup Guide
1. Pin Definition
Understanding the pinout is crucial for proper integration. The module features a DIP package with clearly defined pins for power, data, and control:
Figure 5: Pin definition and dimensions of the E220-900T30D module.
| No. | Name | Direction | Function |
|---|---|---|---|
| 1 | M0 | Input (weak pull-up) | Work with M1 to decide 4 working modes of module (not suspended, if not used, could be grounded). |
| 2 | M1 | Input (weak pull-up) | Work with M0 to decide 4 working modes of module (not suspended, if not used, could be grounded). |
| 3 | RXD | Input | TTL UART inputs, connects to external TXD output pin. |
| 4 | TXD | Output | TTL UART outputs, connects to external RXD input pin. |
| 5 | AUX | Output | Used to indicate the working status of the module; the user wakes up the external MCU, and outputs low level during power-on self-check initialization; (can be left floating) |
| 6 | VCC | Input | Voltage range: 3.0 ~ 5.5V DC |
| 7 | GND | Input | Ground |
| 8 | Fixed hole | — | Fixed hole |
| 9 | Fixed hole | — | Fixed hole |
| 10 | Fixed hole | — | Fixed hole |
| 11 | Fixed hole | — | Fixed hole |
2. Physical Installation
The E220-900T30D module comes in a compact 24x43mm DIP package, making it suitable for integration into various projects. It includes factory nuts and washers for secure mounting.
Figure 6: Module dimensions (24mm x 43mm).
Figure 7: Illustration of nuts and washers for module installation.
Ensure proper impedance matching (50Ω) for the SMA-K antenna type to maximize signal integrity and range.
3. Software Configuration
The module can be configured using dedicated software tools. For detailed RF settings and communication parameters, refer to the following resources:
- RF Setting Tool: Download RF Setting Tool
- XCOM Tool: Download XCOM Tool
These tools allow users to adjust parameters such as frequency, data rate, and power levels to suit specific application requirements.
Operating Instructions
1. LoRa Spread Spectrum Technology
The E220-900T30D utilizes new LoRa spread spectrum technology, offering significant advantages:
- Anti-interference: Enhanced resistance to interference ensures reliable communication in noisy environments.
- Longer Transmission Distance: Achieves communication distances up to 10km.
- Communication Stability: Guarantees stable data transmission.
Figure 8: LoRa spread spectrum technology for enhanced communication.
2. Global License-Free ISM Band Operation
The module operates in the global license-free ISM band, specifically 868MHz and 915MHz, providing flexibility for various applications worldwide.
Figure 9: Module operating in 868/915MHz ISM band.
3. Low Power Consumption (WOR - Wake On Radio)
The module effectively achieves low power consumption through its WOR feature, making it ideal for battery-powered applications. It can wake up only when needed, significantly reducing the power consumption of the receiving end.
Figure 10: WOR mechanism for power saving.
4. Communication Methods
The E220-900T30D supports multiple transmission methods to suit different communication needs:
- Fixed-point transmission: Data is sent transparently to a specific address. Modules with the same address and channel will receive.
- Broadcast transmission: Each module can act as a sender or receiver. Data is sent transparently, and all modules on the same channel will receive.
- Channel monitoring: Allows monitoring data transmission of all modules on a specific channel.
Figure 11: Illustration of fixed-point, broadcast, and channel monitoring communication.
5. RSSI Signal Strength Indicator
The module includes an RSSI (Received Signal Strength Indicator) function, which supports serial port output of the data packet signal strength. This is useful for evaluating signal quality, improving communication networks, and ranging applications.
Figure 12: RSSI signal strength visualization.
6. Watchdog Protection
The E220 module is equipped with an efficient watchdog protection mechanism. In case of an exception, the module will automatically restart and continue operation according to its current parameters, ensuring stable operation without downtime.
Figure 13: Watchdog protection mechanism.
7. Product Overview Video
Video 1: A brief overview of the E220-900T30D LoRa module, showcasing its physical appearance and key features.
Maintenance
To ensure the longevity and optimal performance of your EBYTE E220-900T30D module, follow these maintenance guidelines:
- Handle with Care: The module contains sensitive electronic components. Avoid dropping or subjecting it to physical shock.
- ESD Precautions: Always handle the module in an Electrostatic Discharge (ESD) safe environment to prevent damage to internal circuitry.
- Cleanliness: Keep the module free from dust, dirt, and moisture. Use a soft, dry cloth for cleaning if necessary.
- Environmental Conditions: Operate and store the module within its specified temperature and humidity ranges to prevent malfunction.
- Power Supply: Always use a stable power supply within the specified voltage range (3.0V to 5.5V DC). Over-voltage can cause permanent damage.
Troubleshooting
If you encounter issues with your E220-900T30D module, consider the following troubleshooting steps:
- No Power/Module Not Responding:
- Verify that the power supply voltage is within the 3.0V to 5.5V DC range and is stable.
- Check all power connections (VCC, GND) for proper contact.
- Communication Failure:
- Ensure that both transmitting and receiving modules are configured with the same frequency, data rate, and other communication parameters using the RF Setting Tool.
- Check UART connections (RXD, TXD) to your microcontroller or host device. Ensure TXD of one device is connected to RXD of the other, and vice-versa.
- Verify that the antenna is securely connected and is of the correct SMA-K type with 50 ohm impedance.
- Check for environmental interference. LoRa technology has good anti-interference, but extreme noise can still affect performance.
- Confirm that the communication distance is within the specified 10km range, considering obstacles and line-of-sight.
- Module Restarts Unexpectedly:
- This could be due to the watchdog protection feature. If frequent, check for software errors or unstable power supply that might be triggering the watchdog.
- Poor Signal Quality (Low RSSI):
- Ensure antennas are properly positioned and unobstructed.
- Check antenna connections and cable integrity.
- Increase transmit power if possible and within legal limits for your region.
- Reduce communication distance or optimize antenna placement.
For more in-depth troubleshooting, refer to the official user manual available for download.
User Tips
- When integrating the module into a custom PCB, pay close attention to the PCB layout to minimize noise and ensure proper impedance matching for the antenna trace.
- Utilize the provided RF Setting and XCOM tools for initial configuration and testing to quickly verify module functionality and optimize parameters.
- For battery-powered applications, leverage the Wake On Radio (WOR) feature to significantly extend battery life by keeping the module in a low-power state until data reception is required.
- Always double-check the power supply voltage before connecting to prevent irreversible damage to the module.
Warranty and Support
For comprehensive technical support, additional documentation, and warranty information, please refer to the official EBYTE website or contact their customer service.
The full user manual in PDF format can be downloaded from: EBYTE E220-900T30D User Manual PDF
