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 Parameter Value Brand Ai-Thinker Model Ra-01H OpenELAB SKU AT-Ra-01H RF Chip Semtech SX1276 Product Type LoRa wireless communication module Frequency Range 803MHz to 930MHz Modulation LoRa, FSK, GFSK, MSK, GMSK, and OOK Transmit Power Up to +19dBm according to the official specification Receive Sensitivity Down to -140dBm Communication Interface SPI Maximum SPI Clock 10MHz Operating Mode Half-duplex transceiver Packet Engine Up to 256-byte packet support with CRC Package SMD-16 Module Size 17.0 × 16.0 × 3.2mm, ±0.2mm Antenna Interface Half-hole solder pad for external antenna connection Pin Definition Summary NSS, SCK, MOSI, MISO, reset, DIO0 to DIO5, 3.3V, GND, and antenna pad according to the official pin table Supply Voltage 2.7V to 3.6V, 3.3V typical Recommended Supply Current At least 200mA available from the power supply Operating Temperature -40°C to 85°C Storage Environment -40°C to 125°C, less than 90%RH Certification / Compliance RoHS and REACH listed by the official specification Key Integration Requirement Requires a suitable external antenna and region-compliant frequency configuration 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.
