Ai-Thinker NF-03 Si24R1 2.4GHz Wireless Transceiver Module

Ai-Thinker NF-03 Si24R1 2.4GHz Wireless Transceiver Module

The Ai-Thinker NF-03 is a compact 2.4GHz wireless transceiver module based on the Si24R1 RF chip. It uses a DIP-8 format, onboard PCB antenna, and four-wire SPI host interface, providing a small RF module option for embedded wireless data-link designs.

According to the official NF-03 specification, the module supports GFSK / FSK modulation, 2Mbps / 1Mbps / 250kbps data rates, 126 RF channels, RSSI signal-strength detection, up to 7 +/-1dBm transmit power, and -96dBm receive sensitivity at 250kbps. It operates from 1.9V to 3.6V with 3.3V typical operation.

For related OpenELAB wireless modules and accessories, compare the Ai-Thinker NF-01-S Si24R1 2.4GHz Module, NRF24L01 2.4GHz Wireless Module, NRF24L01 2.4GHz Wireless Transceiver Module, NRF24L01+PA+LNA RF Transceiver Module, and Nano IO Shield with NRF24L01 Socket.

Technical Specifications

Integration Notes & Hardware Guidance

• Power Supply – Keep VCC within 1.9V to 3.6V. Excessive voltage can damage the module.
• Ripple Control – Use a low-ripple supply and reserve filtering with ceramic capacitance, tantalum capacitance, or inductance as needed.
• Grounding – Use careful single-point grounding for the module ground reference and separate noisy circuits where possible.
• Antenna Clearance – Keep the onboard PCB antenna exposed and away from metal shells, relays, and other components that can reduce RF performance.
• Interference Planning – If other wireless modules are installed in the same product, plan frequency use and shielding to reduce co-channel interference.
• Crystal Placement – Increase spacing from nearby crystal oscillators to reduce harmonic and intermodulation interference.
• SPI Routing – Keep CSN, CE, MOSI, MISO, SCK, and IRQ traces short and confirm host IO voltage compatibility before production.
• Range Validation – Validate real-world range with the final enclosure, host board, antenna orientation, channel plan, and selected data rate.
• ESD Handling – Treat the module as an electrostatic-sensitive RF device during storage, assembly, and testing.

Packing List

• 1 x Ai-Thinker NF-03 2.4GHz Si24R1 Wireless Transceiver Module

FAQ

Q: Which RF chip does NF-03 use?
A: The official specification lists the Si24R1 RF chip.

Q: What interface does the module use?
A: NF-03 uses a four-wire SPI interface with CSN, MOSI, MISO, and SCK, plus CE and IRQ control pins.

Q: What data rates are supported?
A: The official specification lists 2Mbps, 1Mbps, and 250kbps data rate support.

Q: What frequency range does it cover?
A: The module operates from 2.4GHz to 2.525GHz with 1MHz adjustable channel spacing.

Q: What is the recommended supply voltage?
A: The supported range is 1.9V to 3.6V, with 3.3V listed as the typical value.

Q: Does it include an antenna?
A: Yes. NF-03 uses an onboard PCB antenna.

Q: How is NF-03 different from NF-01-S?
A: The official NF-03 specification lists a smaller 18.0 x 12.0mm module size, 240m reference test range, and -96dBm sensitivity at 250kbps.