100% brand new and high quality features: set temperature - SetT; gap temperature - BackT 1. Heating mode H: When the temperature is set to BackT; the relay is turned on and the heating equipment starts to work; when the temperature is set to T, the relay is turned off On, the heating equipment stops working; 2. Cooling mode C: When the set temperature T + returns to T; the relay is turned on and the refrigeration equipment starts to work; when the temperature is set to T; the relay is turned on and the refrigeration equipment stops working; 3. High temperature Alarm ALA: When the temperature alarm temperature is reached, the system turns on the sound and light alarm, disconnects the relay, and stops the sound and light with any key; 4. Delayed start OPH: When the normal heating or cooling work is completed, the system starts timing T, and only after TOPH After that, the system can carry out the next round of heating or cooling work; 5. Temperature correction function OFE (-10.0 ~ 10.0): If the system works for a long time, deviation may occur, which can be corrected through this function. Temperature = measured value + calibration value ; 6. Parameter remote reading/setting: parameters such as setting temperature, gap temperature, temperature correction, etc. can be set through UART. 7. Real-time temperature reporting: If the temperature reporting function is turned on, the product transmits to the terminal through UART at 1s intervals to facilitate data collection; 8. Relay enablement (enabled by default): If the relay is disabled, the relay remains disconnected; 9. Restore factory settings: Press the STOP and SET keys simultaneously for more than 3 seconds to restore factory settings; working mode setting/gap temperature: 1. In the running interface, short press the SET key to enter the quick setting interface; 2. After entering the quick setting interface, Switch parameters. 3. Use the UP DOWN key to modify parameter values, supporting short press/long press; 4. Press and hold SET to set up the setting for more than 3S or continuously for 6S without any key operation, quickly exit the setting interface, and save the parameters; alarm temperature/delayed start/ Temperature correction: 1. In the operation interface, press and hold SET for more than 3s to enter the parameter setting interface; 2. Enter the parameter setting interface and switch the setting parameters by short pressing the SET key; 3. Modify the parameter value through the UP DOWN key, supporting short Press/long press; 4. Press SET for more than 3s or continuously for 6S without any key operation, exit the parameter setting interface, and save the parameters; how to turn on the high temperature alarm (off by default): Enter the parameter setting interface, switch to the alarm parameter ALA, short press The STOP key turns on or off the high temperature alarm function. If the high temperature alarm function is turned off, ALA displays "----" as a reminder; how to enable delayed start (default 0ff): Enter the parameter setting interface, switch to the alarm parameter OPH, and short press STOP key to turn on or off the high temperature alarm function. If the high temperature alarm function is turned off, OPH displays "---" reminder; Serial control (MCU UART) Communication standard: 9600bps, data bits: 8 Stop bits: 1 CRC: None Flow control: None Packing list: 1 x XY-WT01 temperature controller