RFC33A wireless module is a high-performance wireless communication module with a working frequency of 433MHz and a communication distance of 2000 meters. It adopts ShockBurstTM technology, which can automatically process data packet headers and has a built-in CRC checksum function to ensure reliable data transmission.
The RFC33A is a wireless module based on the Nordic nRF905 chip with an added power‑amplifier circuit that raises the output to 33 dBm, extending the typical range to over 2000 m. It operates in the 433/868/915 MHz ISM bands, supports GFSK modulation, and can be programmed via an SPI interface.
This manual covers the product overview, key features, pin‑out and electrical parameters, SPI programming sequences, register configuration, and practical application notes. It also includes safety warnings, power‑supply recommendations, and contact information for technical support. This manual is written in Chinese.
| Maximum transmit power | 33 dBm |
|---|---|
| Maximum data rate | 50 kbps |
| Peak current | <1 A |
| Average transmit current | <300 mA |
| Receive mode current | 12.5 mA |
| Operating temperature range | -40 to +85 °C |
| Typical sensitivity | -100 dBm |
The VCC5 pin should be supplied with 4.5 V to 5.5 V, with 4.5 V recommended.
The module can achieve a communication distance of over 2000 meters when the power‑amplifier circuit is used.
The mode‑switching time is approximately 1 ms.