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Update information: Change chip from SI4463 to SI4438 (Shipped from 11.26.2019)
Note: HC-11 cannot communicate with the HC-12, they work independently, used in pairs.
Features:
1. Supply voltage: 3.2V~5.5V. (If the module you want to work long hours in the emission state, it is recommended that when the supply voltage exceeds 4.5V threaded a 1N4007 diode to prevent module built-in LDO heated)
2. Default address range (open field test): About 600m (maximum communication distance adjustable reach 1000m, the baud rate is 500bps)
3. Default idle current: 16MA (In different working modes operating current is different)
4. Module dimensions: 27.8 x 14.4 x 4mm
5. Operating frequency range: 433.4-473.0MHz, up to 100 channels of communication
6. The maximum transmit power: 100mW (settable)
7. Module support software upgrade
8. Default factory settings: Mode FU3, baud rate is 9600bps, communication channels CH001 (433.4M)
 9. Four transparent transmission modes, adapt to different application occasions.
10. Built-in MCU, free of programming, only need to communicate with external devices through the serial port
11. Unlimited number of bytes sent in a single time (FU1 / FU3 mode)
12. The module supports one-to-one, one-to-many, many-to-one, many-to-many connection transparent transmission
Parameter name | Reference | Parameter name | Reference |
Model | HC-12 | Module size | 27.4 x13.2 x 4mm |
Frequency Range | 433.4 ~ 473.0MHZ | Working frequency | 433.4-473.0MHz |
Communication Interface | UART 3.3V / 5V TTL level | Antenna interface | Spring antenna / antenna socket |
Operating Voltage | 3.2-5.5V | Idle current | 16mA |
Communication level | 3.3V / 5V level | Working humidity | 10% ~ 90% |
Transmit power | 20dBm (MAX) | Operating temperature | -25 ° C ~ + 75 ° C |
Reference distance | 1000m | storage temperature | -40 ° C ~ + 85 ° C |
The HC-12 module has four serial port transparent transmission modes denoted by FU1, FU2, FU3 and FU4. When using each mode, all you need to do is to send and receive serial data. You do not need to control the wireless transmission part in the air, but you can only communicate with each other at the same air baud rate!
 
 FU1: (send AT + FU1 in more power-saving mode) The idle working current of the module is about 3.6mA. In this mode, 8 kinds of serial port baud rates can be set, and the air baud rate is unified to 250000bps
FU2: (send AT + FU2 in power saving mode) The idle working current of the module is about 80uA. Under the mode, the module only supports the serial baud rate of 1200bps, 2400bps and 4800bps, and the air baud rate is unified to 250000bps
FU3: (send AT + FU3 in full speed mode (factory default)) The idle working current of the module is about 16mA. The module will automatically adjust the wireless transmission air baud rate according to the serial port baud rate
FU4: (Send AT + FU4 in longer distance mode) The idle working current of the module is about 16mA, the serial port baud rate is fixed at 1200bps, and the air baud rate is 500bps
Number | AT command (x means parameter) | Response | Effect |
1 | AT | OK | Check whether the module is normal |
2 | AT+Bxxxx | OK+Bxxxx | Change the serial port baud rate |
3 | AT+Cxxxx | OKsetname | Change the channel of wireless communication |
4 | AT+FUx | OK+FUx | Change the module serial port transparent transmission mode |
5 | AT+Px | OK+Px | Set the module's transmit power level |
6 | AT+Ry | OK + (parameter specified by y) | Get the individual parameters of the module |
7 | AT+RX | OK + various parameters | Get all parameters of the module |
9 | AT+V | HC-12_V2.6 | Query module firmware version information |
10 | AT+SLEEP | OK+SLEEP | Enter sleep mode |
11 | AT+DEFAULT | OK+SLEEP | Reset |
 
Package included:
1 x HC-12 module
 
 
Shipping method(s) | Shipping time | Tracking information |
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