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The HC-12 is a wireless RF UART communication module operating from 433.4 to 473.0 MHz with 100 selectable channels. It offers a maximum transmission power of 20 dBm, a receiver sensitivity of about -116 dBm at 5000 bps and a reference communication distance the maker states as around 500 m in one place and 1000 m in another, so treat the real range as dependent on your data rate, antenna and surroundings.
An onboard STM8S003F3P6 microcontroller talks to the SI4463 radio chip internally and exposes a simple TTL serial interface (RX, TX, GND) to your project, so you send and receive data as if you were talking to a plain serial device.
Operating voltage is 3.2 to 5.5 V, the antenna interface is a spring antenna or antenna socket, and the module works from -25 to +75 C at 10 to 90 percent humidity. The underlying SI4463 chip is described as IEEE 802.15.4g compliant, covering a frequency range of 119 to 1050 MHz, with a receive sensitivity down to -126 dBm, support for (G)FSK, 4(G)FSK, (G)MSK and OOK modulation, data rates from 100 bps to 1 Mbps, 64-byte FIFOs, AFC/AGC and a low-battery detector.
Power the module from a clean, adequately rated supply, since radio and camera modules draw current in short bursts that a weak supply cannot follow. Keep the antenna clear of metal and ground planes, and start with the maker's example code before writing your own.
Makers who want a long-range wireless serial link without dealing with SPI registers directly, for projects such as remote sensors, garden monitors and simple telemetry.
433.4 to 473.0 MHz, with 100 selectable channels.
Over a simple TTL serial interface (RX, TX, GND).
3.2 to 5.5 V.
20 dBm.
Around 500 to 1000 m depending on data rate and conditions, as stated by the maker.
| Brand | Generic |
|---|---|
| Frequency | 433MHz |
| Selling unit | PCS |
