The Ebyte E22-230T37S is a high-performance LoRa wireless serial module featuring advanced SX1262 technology, operating in the 220.125-236.125MHz frequency band with a powerful 37dBm transmission output, enabling ultra-long-range communication up to 25km for demanding industrial IoT and remote telemetry applications requiring stable TTL level data transmission.
| Parameter | Specification |
|---|---|
| LoRa Solution | SX1262 |
| Frequency Band | 220.125 to 236.125 MHz |
| Transmit Power | 37 dBm |
| Communication Distance | 25 km |
| Communication Interface | UART Serial Port |
| Supply Voltage | 4.5 to 15 V DC |
| Weight | 10.8 grams |
Manual Download
E22-230T37S Manual
Company Profile
RF_Setting(E22-E9X(SL))+V3.3
Application Note
Practical Application Scenarios
1. Large-Scale Agricultural Irrigation Monitoring
The module’s 25km range allows for centralized management of widespread irrigation systems in open fields. By pairing the E22-230T37S with soil moisture sensors, farmers can achieve real-time remote valve control and data reporting across vast hectares without the need for cellular data plans.
2. Remote Power Grid and Distribution Automation
Engineers deploy this module in remote power substations to monitor equipment status and fault indicators. Its operation in the 230MHz band provides superior penetration and diffraction characteristics through challenging terrain or urban obstacles, ensuring stable command delivery for grid stability.
3. Industrial Asset Tracking and Pipeline Monitoring
For oil and gas pipeline infrastructure, this LoRa module acts as a reliable long-range data link for pressure and flow rate monitoring. Its high transmission power (37dBm) ensures that mission-critical alert data from remote nodes reaches the control center even in harsh, high-interference environments.
FAQ
Q: Why is a level conversion circuit required when interfacing with a 5V MCU?
A: Although the module supports a wide supply voltage up to 15V, its UART communication interface operates at a 3.3V TTL logic level. Connecting a 5V MCU directly to the RXD pin can lead to excessive current injection through the internal ESD protection diodes, which poses a significant risk of permanent thermal damage to the SX1262 chip. Using a level shifter or a simple resistor-based voltage divider is essential to ensure signal integrity and hardware longevity.
Q: What are the power supply requirements to maintain a stable 37dBm output?
A: To reach the peak 5W transmission power, the power supply must be capable of providing at least 3.5A of instantaneous current at 5V. If the supply impedance is too high or the traces are too thin, the transient voltage drop during transmission will cause frequency pulling or power output degradation. It is recommended to place a high-quality 470uF or larger electrolytic capacitor near the VCC pin to buffer current spikes.
Q: How does the 230MHz frequency band compare to 433MHz in terms of diffraction?
A: The 230MHz band has a longer wavelength than the 433MHz band, which inherently provides better diffraction characteristics when encountering physical obstacles like buildings or hills. This allows the E22-230T37S to "bend" around obstacles more effectively, significantly reducing shadow fading and improving link reliability in non-line-of-sight industrial environments.
