Sunhokey HC-12 433Mhz SI4463 Wireless Serial Port Module 1000m Replace Bluetooth with Antenna HC-12-1pcs

HC-12 module has four UART transparent transmission mode: FU1, FU2, FU3, and FU4. When in use, various modes are just to send and receive UART data can be, without a transmission part, but only in the same air baud rate can communicate with each other sky! The system default in FU3 full speed mode, this mode can automatically and according to the baud rate of serial baud rate, low baud rate communication distance. In the module "SET" pin is low level, you can set the UART transmission mode through the AT command (see the introduction of the following chapters). FU1 mode is more power-saving mode, at this time, the idle work current of the module is about 3.6mA. This mode can also set up 8 kinds of UART baud rate is shown in the table above, but the air uniform 250000bps baud rate, short communication distance. FU2 mode is power saving mode, at this time the module idle work current is about 80?A. This mode module supports only 1200 bps, 2400 bps, and 4800 bps UART baud rate, the air baud rate is uniform 250000bps, short communication distance. At the same time, in the FU1 and FU3 mode set to FU2 mode, more than 4800 UART baud rate will be automatically reduced to 4800 bps. FU2 mode, only the transfer of a small amount of data (each packet within 20 bytes), packet transmission time interval cannot be too short (preferably in more than 2 seconds), otherwise it will result in data loss. FU4 mode for ultra long-distance communication mode, the UART baud rate is fixed at 1200 bps, the air baud rate is 500bps. From the other mode to FU4, the serial baud rate will be automatically converted to 1200bps. In this mode, only a small amount of data is transferred (each packet is within 60 bytes), the packet transmission time interval cannot be too short (preferably in more than 2 seconds), otherwise it will result in data loss.