Ai-Thinker Ra-01SCH LLCC68 LoRa 803-930MHz IPEX Module 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. Technical Specifications 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 -40°C to 85°C Storage Environment -40°C to 125°C, less than 90%RH 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 more than 200mA supply capacity. Ripple Control — Prefer clean LDO power where possible; if DC-DC is used, keep ripple low and reserve dynamic response capacitance. SPI Routing — Keep SPI and control traces short, clean, and away from switching-power nodes to reduce RF and digital noise coupling. Antenna Connection — Use a matched IPEX antenna for the selected frequency band and verify antenna placement inside the final enclosure. Regional Frequency — Configure frequency, bandwidth, spreading factor, and output power according to local radio regulations. No-Load Protection — Do not operate the RF output without a suitable antenna or 50Ω load during debugging. Host Firmware — Ensure the host MCU handles LLCC68 radio configuration, packet settings, SPI transfers, and interrupt events correctly. ESD Handling — Treat the module as an electrostatic-sensitive RF device during soldering, test, and assembly. Range Validation — Test the antenna, enclosure, link budget, and RF settings in the final product form before deployment. Packing List 1 × Ai-Thinker Ra-01SCH LoRa LLCC68 Wireless Module with IPEX Connector FAQ 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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