Soil testing plays a vital role in achieving optimal plant growth, maintaining soil health, protecting the environment, and ensuring cost-effective and sustainable agricultural practices. However, the traditional soil testing methods face several problems since it involves labourintensive, time consuming, cost associated with transportation and handling. Further the soil properties can vary widely within a short distance so it becomes difficult to have representative samples that accurately reflect the entire area with distance. Hence, there was a need for design and development of advanced soil testing probes that can be used at the field locations for rapid testing and having accuracy, efficiency and cost effectiveness. However not much work is reported on advancement in soil testing probes. The present paper deals with the design and development of an Advanced Soil Testing Probe for in field monitoring of the critical soil parameters such as Nitrogen (N), Phosphorus (P), Potassium (K), pH, moisture, and temperature. The system is developed with STM32 Microcontroller and ESP32 WiFi interface and the MathWorks Thing Speak Internet of Things (IoT) cloud platform to provide real-time data collection, transmission, and analysis. The system is equipped with calibrated sensors, collects data on soil nutrient levels and environmental conditions, transmitting this information via Wi-Fi to the Thing Speak cloud for continuous monitoring. Users can access and visualize the data through Thing Speak’s dashboards, facilitating an intuitive understanding of soil health.