LoRaWAN soil moisture, temperature, and electrical conductivity (EC) three in one sensor, designed specifically for precision agriculture. It can penetrate deep into the soil, accurately detect soil temperature, humidity, conductivity, and other values in real time, with minimal measurement error. The sensor is also powered by solar energy, designed with low power consumption, and does not require frequent battery replacement, ensuring long-term stable operation. By adopting LoRaWAN remote low-power communication technology, stable data transmission can be achieved with low power consumption in remote farmland. Farmers can track soil nutrient status at any time and apply fertilizers reasonably through supporting software, which not only reduces costs but also improves crop yield and quality, helping agriculture develop towards intelligence and efficiency.