This project develops a method of wireless communication between a mobile device and a HART modem through the programming in Micropython of the microcontroller based board WiPy in order to obtain the values of different HART sensors. For this, a wireless communication is established through the WiFi router between the WiPy and the client, and a direct link between the WiPy and the HART modem, in this way, the WiPy performs a data gateway function between them. The query is done through the client by entering the address of the sensor and the obtained response is composed by the measured value and the units, which are displayed on the mobile device.