Reyax RYLR993 868/915MHz LoRaWAN Transceiver Module

Connect the module's UART TX/RX pins to a microcontroller's serial port at 9600 bps. Use AT commands like AT+NWK to set the network mode (LoRaWAN), AT+BAND to select your regional frequency (e.g., US915), and AT+JOIN to connect to a LoRaWAN server such as The Things Network. Ensure your power supply is stable during the join process, which can take several seconds.

The default UART baud rate is 9600 bits per second. This rate is used for all AT command communication. While some Reyax modules support changing the baud rate via an AT command (e.g., AT+UART), you should consult the specific RYLR993 datasheet to confirm if this parameter is configurable, as using an incorrect baud rate will result in communication failure with your host MCU.

Yes, the RYLR993 supports standard LoRaWAN Class A, B, and C operation for connecting to public or private networks. It also features a proprietary LoRa mode, compatible with other Reyax devices like the RYLR998, allowing you to create point-to-point or private star networks without a LoRaWAN server. The mode is selected via AT commands, giving flexibility for different project requirements.

While the exact voltage range isn't specified in the provided data, typical LoRa modules operate from 2.0V to 3.6V. For battery operation, ensure your regulator provides a clean, stable supply. To minimize current, utilize the module's deep sleep modes between transmissions, as the high 140mA transmit current is only active during RF activity. Design your firmware to keep transmissions brief and infrequent.