Ai-Thinker Ra-09 STM32WLE5CCU6 LoRaWAN 410-525MHz ModuleThe Ai-Thinker Ra-09 is a LoRa wireless IoT module built around STMicroelectronics' STM32WLE5CCU6 wireless SoC. It integrates an LPWAN RF transceiver, modem, and 32-bit Arm…
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The Ai-Thinker Ra-09 is a LoRa wireless IoT module built around STMicroelectronics’ STM32WLE5CCU6 wireless SoC. It integrates an LPWAN RF transceiver, modem, and 32-bit Arm Cortex-M4 MCU in one compact module, making it suitable for embedded products that need LoRaWAN communication and onboard application processing.
The official Ra-09 specification lists 410MHz to 525MHz frequency support, LoRaWAN protocol support, LoRa / GFSK / BPSK / GMSK modulation, up to +22dBm theoretical transmit power, and receive sensitivity down to -140dBm at 125kHz SF12. It also provides UART, GPIO, ADC, DAC, I2C, I2S, SPI, and PWM interfaces for flexible host or standalone hardware design.
For related OpenELAB LoRa modules, compare the Ai-Thinker Ra-09H STM32WLE5CCU6 LoRa Module, Ai-Thinker Ra-08H LoRaWAN RF Module, Ai-Thinker Ra-08H-Kit, Ai-Thinker Ra-08-Kit ASR6601 Development Module, and Ai-Thinker Ra-01H SX1276 LoRa Module.
| Parameter | Value |
|---|---|
| Brand | Ai-Thinker |
| Model | Ra-09 |
| OpenELAB SKU | AT-Ra-09 |
| Main SoC | STM32WLE5CCU6 |
| CPU | 32-bit Arm Cortex-M4 MCU |
| CPU Frequency | Up to 48MHz |
| Embedded Memory | 256KB Flash and 64KB RAM |
| Product Type | LoRaWAN wireless IoT module with integrated MCU and RF transceiver |
| Frequency Range | 410MHz to 525MHz |
| Transfer Protocol | LoRaWAN listed by the official specification |
| Modulation | LoRa, GFSK, BPSK, and GMSK support listed by the official specification |
| Transmit Power | Up to +22dBm theoretical maximum; 21dBm typical and 22dBm maximum at 433MHz, 470MHz, 490MHz, and 510MHz in the RF table |
| Receive Sensitivity | -123dBm at SF7, -126dBm at SF8, -128dBm at SF9, -131dBm at SF10, -135dBm at SF11, and -140dBm at SF12 with 125kHz bandwidth |
| Spreading Factor Support | SF5, SF6, SF7, SF8, SF9, SF10, SF11, and SF12 |
| Package | SMD-48 |
| Module Size | 18.0 18.0 2.6mm, 0.2mm |
| Antenna Interface | Compatible with half-hole pad and IPEX connector; external antenna required |
| Interfaces | UART, GPIO, ADC, DAC, I2C, I2S, SPI, and PWM |
| IO Count | 24 IO listed in the main parameter table |
| UART Rate | 110 to 4,608,000 bps supported; default 9600 bps |
| Crystal Frequency | 32MHz |
| Supply Voltage | 1.8V to 3.6V, 3.3V typical; 3.3V or above is recommended for guaranteed output power |
| Recommended Supply Current | At least 500mA available from the power supply |
| Power Consumption Reference | 3.83mA power-on operation mode, 119mA full-load TX at 22dBm, 5.15mA RX at SF9, and 0.113A deep sleep according to the official electrical table |
| Transmission Distance Reference | 4.8km open-field reference using a sucker antenna according to the official main parameter table |
| Operating Temperature | -40C to 85C |
| Storage Conditions | -40C to 125C, less than 90%RH |
| Moisture Sensitivity | MSL level 3; use within 168 hours after opening the vacuum bag at 25 5C / 60%RH or bake before secondary reflow |
Q: Which chip does Ra-09 use?
A: It uses the STM32WLE5CCU6 wireless SoC, which integrates an LPWAN RF transceiver, modem, and 32-bit Arm Cortex-M4 MCU.
Q: What frequency range does Ra-09 support?
A: The official specification lists 410MHz to 525MHz. Final settings must comply with the allowed band in the target region.
Q: Does Ra-09 support LoRaWAN?
A: Yes. The official main parameter table lists LoRaWAN as the transfer protocol.
Q: What antenna connection does it use?
A: The module supports half-hole pad and IPEX antenna connection options, and it requires an external antenna.
Q: What supply voltage should I design for?
A: The listed range is 1.8V to 3.6V, with 3.3V recommended for output-power performance and at least 500mA current capacity.
Q: Can it run without a separate MCU?
A: Because Ra-09 integrates an Arm Cortex-M4 MCU, it can support embedded application logic, but the final firmware architecture depends on the project design.
Q: What affects communication distance?
A: Antenna match, power supply stability, terrain, metal enclosure, humidity, interference, LoRa data rate, and regional power settings all affect real-world range.
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