This speech uses precision agriculture as an example to show how to bridge AI to precision applications through IoT. Today, most lands suitable for farming are already in use. To increase the volume with the limited crop cultivation resources, precision farming has been developed to improve production efficiency through the IoT techniques. However, several issues significantly affect the progress of smart agriculture industry. Some commercial IoT products for agriculture are too expensive. Furthermore, some products are difficult to install and the maintenance costs are high. These issues prevent the farmers from accepting the smart agriculture deployment. This paper proposes AgriTalk, an inexpensive IoT platform for precision farming of soil cultivation. This paper uses turmeric cultivation as an example. Experiments indicate that the turmeric quality is significantly enhanced through AgriTalk. Specifically, the curcumin concentration is up to 4500-5500 mg/100g, which is 5 times more than existing products. We demonstrate how to intuitively configure the connections between the sensors and the actuators with the desired farming intelligence, and to effectively maintain AgriTalk for precision farming.