The AN-207 wireless monitoring unit launched by Weichuan Technology is mainly used for measuring soil acidity and alkalinity. The sensor probe of this product adopts a pH electrode, which has the characteristics of wide measurement range, good linearity, good waterproof performance, and easy use. The data transmission adopts LoRa wireless technology, which has the characteristics of long distance and low power consumption. Combined with LoRaWAN standard protocol, it can quickly connect with third-party platforms. The product is suitable for pH monitoring applications such as soil acidity and alkalinity detection.