Ai-Thinker Ra-01H SX1276 LoRa 803-930MHz Wireless Module

The Ai-Thinker Ra-01H is a compact LoRa wireless communication module based on the Semtech SX1276 transceiver. It supports long-range spread-spectrum communication in the 803MHz to 930MHz range and is designed for embedded IoT devices that need low-power, high-sensitivity wireless links.

The official Ra-01H specification lists LoRa, FSK, GFSK, MSK, GMSK, and OOK modulation support, SPI communication, up to +19dBm transmit power, and receive sensitivity down to -140dBm. Its SMD-16 package, 17 16 3.2mm size, and half-hole antenna pad make it easy to integrate into compact custom PCBs.

For related OpenELAB LoRa modules, compare the Ai-Thinker Ra-02 SX1278 LoRa Module, Ai-Thinker Ra-01S SX1268 LoRa Module, Ai-Thinker Ra-01SH SX1262 LoRa Module, Ai-Thinker Ra-01SC LLCC68 LoRa Module, and Ai-Thinker Ra-08H LoRaWAN RF Module.

Technical Specifications

Integration Notes & Hardware Guidance

• Power Supply Use a stable 3.3V rail within the 2.7V to 3.6V range and reserve at least 200mA current capacity.
• SPI Routing Keep SPI lines short and clean, especially when using higher SPI clock speeds up to the listed 10MHz limit.
• Antenna Design Use a properly matched external antenna for the selected frequency band and keep the antenna area clear of metal parts.
• Regional Frequency Configure the operating frequency according to the legal LoRa band used in the target sales or deployment region.
• RF Grounding Provide a stable RF ground reference and avoid routing noisy digital or switching-power traces near the antenna feed.
• IO Protection Add suitable ESD protection where SPI, reset, DIO, or antenna paths connect to exposed connectors or test pads.
• Host Firmware Ensure the host MCU firmware supports SX1276 register configuration, packet settings, and interrupt handling.
• Range Testing Validate antenna, enclosure, spreading factor, bandwidth, coding rate, and transmit-power settings in the final product form.
• Thermal and EMC Check Verify RF output, current draw, and electromagnetic compatibility under the final duty cycle and enclosure design.

Packing List

• 1 Ai-Thinker Ra-01H LoRa SX1276 Wireless Module

FAQ

Q: Which chip does Ra-01H use?
A: Ra-01H is based on the Semtech SX1276 LoRa transceiver.

Q: What frequency range does this module support?
A: The official specification lists 803MHz to 930MHz, so the final frequency must be configured according to the target region’s regulations.

Q: Is this a LoRaWAN module?
A: Ra-01H is a LoRa transceiver module. LoRaWAN requires a compatible host stack, network configuration, and regional parameter setup.

Q: What interface does the host controller use?
A: The module communicates through SPI and also exposes reset and DIO pins for control and interrupt handling.

Q: Does it include an antenna?
A: No antenna is listed in the module specification. Use a suitable external antenna connected to the half-hole antenna pad.

Q: What supply voltage should I use?
A: Use a 3.3V typical supply within the listed 2.7V to 3.6V range, with at least 200mA current capability.

Q: How can I improve wireless range?
A: Use a matched antenna, clean RF layout, legal transmit-power settings, correct spreading factor and bandwidth, and validate performance in the final enclosure.