AI-Thinker Ra-01S-P LoRa Module (SX1268, 410-525MHz)

The Ra-01S-P connects via a standard SPI interface (MOSI, MISO, SCK, NSS/CS pins). You must also connect the RESET, BUSY, and DIO1 pins for full functionality. It is compatible with popular MCUs like the ESP32, STM32, Arduino (via Software SPI), and Raspberry Pi. Ensure your firmware library, such as the Arduino LoRa library or SX126x driver, correctly maps these GPIOs and configures the SPI clock speed (typically up to 10 MHz).

The module supports three antenna options: an IPEX connector (for a plug-in antenna), half-hole solder pads, or through-hole pads. For the IPEX connector, use a matched 50-ohm antenna like a 433MHz or 470MHz whip. For the pad options, solder a wire antenna or PCB trace antenna directly. Ensure impedance matching for optimal performance. The antenna length should be tuned for your specific center frequency (e.g., 433MHz or 470MHz) within the 410-525MHz range to maximize radiated power and sensitivity.

The module requires a stable 3.3V DC supply (range 3.0V to 3.6V) capable of supplying bursts over 1A during high-power transmission (+29dBm). During receive mode, current drops to approximately 11mA. For battery operation, implement deep sleep between transmissions and use a high-capacity LDO or switching regulator. Always bypass the power pins with bulk and decoupling capacitors (e.g., 10µF and 100nF) close to the module's VCC pin to ensure stable RF performance.

Yes, the Ra-01S-P is a physical layer (PHY) transceiver compatible with LoRaWAN protocol stacks. You need to implement a LoRaWAN stack (like LMIC, LoRaMac-node, or Arduino-LMIC) on your host microcontroller to handle the MAC layer, OTAA/ABP activation, and uplink/downlink messaging. Configure the radio for your region's frequency plan (e.g., 433MHz EU, 470MHz China) and use appropriate spreading factors and data rates as defined by your LoRaWAN network server (The Things Network, ChirpStack, etc.).