HC-12 SI4463 wireless serial microcontroller, 433 long-range, 1000 M with Bluetooth antenna for HC12
1: supply voltage 3.2 v ~ 5.5 v. (If the module wants to work long in stete form emission, recommend supply voltage more than 4.5 v join-up when a diode 1n4007, module avoided pyrexia built-in ldo)
2: standard communication distance (open test): 600 m around (communication of the highest adjustable 1000 m range, 5000bps air transmission rate).
3: idlesse current: 16ma standard (module in different operating mode different working current).
4: Module measurement: 27.8mm X 14.4mmX 4mm.
5: Working frequency: normic beleaguer rate (433.4 – 473.0 mhz up to 100 frequency communications tao) maximum power 100 mw morphism hair (can suppose ventilation)
6: Support software upgrade module. (Us to the client to update the software)
7: factory defaults: fu3 working model, 9600bps baud rate, ch001 communication channel (433.4 m).

AT command set:
Module parameters, AT command set
AT command is used to set the parameters of the function module and switching modules need to exit the setting mode after setting to take effect. Meanwhile, modify the parameters and functions, power-down is not lost.

Enter the command mode:
The first entry mode – normal use (has the power) in the first 5-pin “SET” is set low;
The second mode of entry – power, 5th pin “SET” again first set low on power.
Both methods can make the module into AT command mode, release (“SET” pin is not connected low) to exit command mode. After the exit command mode, if you change the module function, the function will be cut to the appropriate state.
The second way is fixed in serial format 9600, N, 1 into the AT.