HC-12 433 MHz Wireless Serial Module (Chinese Version, Next to Original Quality)
433.4-473.0 MHz, 100 channels, up to 20 dBm, UART, AT commands, 3.2-5.5 V
Details
Long-range wireless serial module that replaces a UART cable with a radio link. Connect it to your MCU over TX and RX, pair two modules on the same channel, and data sent into one comes out of the other. There is no radio code to write, and settings such as channel, power and baud rate are changed with AT commands using the SET pin. This is the Chinese version, next to original quality. It is not an original HC-Tech module. Specifications and the user manual are from the original HC-12, so check them against your own design. The 1,000 m range is the manual's figure for open space at the lowest air data rate; real range will be shorter at higher speeds or around buildings. The photo is a reference image and the RF chip marking can differ between batches. Use a supply that can deliver at least 200 mA. Never transmit without an antenna connected. Use this module within the radio rules that apply in your area.
Specifications
- Frequency: 433.4-473.0 MHz
- Channels: 100, 400 kHz steps
- Transmit power: up to 100 mW (20 dBm), 8 levels
- Receive sensitivity: -117 dBm at 5,000 bps in the air
- Range: up to 1,000 m in open space at 5,000 bps in the air
- Interface: UART, configured by AT commands
- Supply: 3.2-5.5 V, at least 200 mA
- Transmit current: up to 100 mA
- Size: 27.8 x 14.4 x 4 mm