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The Ai-Thinker Ra-01SCH is a compact LoRa wireless communication module based on the Semtech LLCC68 transceiver. It is positioned for long-distance spread-spectrum communication in the 803MHz to 930MHz range, providing a practical RF module option for embedded IoT devices that need low-power sub-GHz connectivity.
The official Ra-01SCH documentation lists LoRa, FSK, GFSK, MSK, GMSK, and OOK modulation support, SPI half-duplex communication, up to +22dBm transmit power, receive sensitivity down to -129dBm, and support for spreading factors SF5 through SF11. This SKU uses an IPEX antenna connector for external antenna installation and enclosure-level RF validation.
For related OpenELAB LoRa modules, compare the Ai-Thinker Ra-01SC LLCC68 LoRa Module, Ai-Thinker Ra-01H SX1276 LoRa Module, Ai-Thinker Ra-01SH SX1262 LoRa Module, Ai-Thinker Ra-01SCH-P LoRa Module, and Ai-Thinker Ra-08H LoRaWAN RF Module.
| Parameter | Value |
|---|---|
| Brand | Ai-Thinker |
| Model | Ra-01SCH |
| OpenELAB SKU | AT-Ra-01SCH-IPEX |
| RF Chip | Semtech LLCC68 |
| Product Type | LoRa wireless communication module with IPEX antenna connector |
| Frequency Range | 803MHz to 930MHz |
| Modulation | LoRa, FSK, GFSK, MSK, GMSK, and OOK |
| Transmit Power | Up to +22dBm according to the official documentation |
| Maximum Working Current | 120mA listed by the official documentation |
| Receive Sensitivity | Down to -129dBm |
| Receive Current | 4.2mA minimum in receive state according to the official documentation |
| Standby Current | 0.6mA |
| Spreading Factor Support | SF5, SF6, SF7, SF8, SF9, SF10, and SF11 |
| Communication Interface | Half-duplex SPI |
| Programmable Bit Rate | Up to 300Kbps |
| Packet Engine | CRC support with up to 256-byte packet engine |
| Package | SMD16 dual-row stamp-hole package |
| Module Size | 17.0 16.0 3.2mm, 0.2mm |
| Antenna Interface | IPEX socket; Ra-01SCH family also supports stamp-hole and through-hole antenna options |
| Crystal Frequency | 32MHz |
| Supply Voltage | 2.7V to 3.6V, 3.3V typical |
| Recommended Supply Current | More than 200mA available from the power supply |
| Operating Temperature | -40C to 85C |
| Storage Environment | -40C to 125C, less than 90%RH |
| Key Integration Requirement | Requires a suitable external antenna and region-compliant frequency configuration |
Q: Which chip does Ra-01SCH use?
A: Ra-01SCH uses the Semtech LLCC68 LoRa transceiver.
Q: What frequency range does this module support?
A: The official documentation lists 803MHz to 930MHz. Final operation must comply with the allowed band in the target region.
Q: What antenna connection does this SKU use?
A: This SKU is the IPEX version, so it is intended for use with a compatible external antenna.
Q: Is Ra-01SCH a LoRaWAN module?
A: Ra-01SCH is a LoRa transceiver module. LoRaWAN requires a compatible host stack, network setup, and regional configuration.
Q: What interface does the host MCU use?
A: The module uses half-duplex SPI for radio communication and exposes related control and interrupt signals through its module pins.
Q: What supply voltage should I use?
A: Use 3.3V typical supply within the listed 2.7V to 3.6V range.
Q: How can I improve link distance?
A: Use a matched antenna, clean RF layout, legal transmit power, proper LoRa parameters, and validate performance in the final enclosure.
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