Novel circuit of soil temperature and humidity sensor

The utility model relates to a novel circuit of soil temperature and humidity sensor, including C8051F350 singlechip, singlechip reset circuit, temperature sensor circuit, voltage conversion circuit and serial communication circuit, singlechip reset circuit inserts the decoupling capacitor and adds an outside pull -up resistance on the RES of C8051F350 singlechip pin, the measuring bridge that temperature sensor circuit comprises resistance R1, resistance R2, resistance R3 and temperature sensor PT100 is connected to the AIN0.0 pin and the AIN0.1 pin of C8051F350 singlechip, does voltage conversion circuit include LP2981 stabiliser and LM2660 voltage converter, and external power supply is connected to the input of LP2981 stabiliser, and LP2981 output end of the voltage regulator output circuit positive voltage V+ is connected to LM2660 voltage converter's input, LM2660 voltage converter's output output circuit negative voltage V the utility model provides high soil moisture's accuracy. 本实用新型涉及种土壤温湿度传感器新型电路，包