Connection and Calibration of RTK-DGPS with Microcontroller STM32F401RE-Nucleo 32 Bit
Abdul Azis, Radite PA, Setiawan

Universitas Hasanuddin

Abstract

Precision Farming is a technology that is able to streamline the use of crop production inputs such as fertilizers and pesticides through the correct application of dosage, location and time. The web-based precision farming system requires GPS or RTK DGPS technology as a tool navigator when operating in the field, so that precise location applications can be achieved. The use of an 8-bit based microcontroller module for communication with GPS in precision farming systems has a deficiency in handling latitude and longitude data which has 11 characters. Therefore, the STM32F401RE-Nucleo microcontroller was chosen because it has the ability to handle data up to 32 bits. The method used is to communicate between the RTK-DGPS and the microcontroller module. The test is carried out using single precision and double precision formats. The test results showed that the reading of single precision format obtained a fairly large error ranging from 10% - 40% between the NMEA RTK-DGPS data and the data received by the microcontroller. While with double precision format, an error is obtained in the range of 1% - 8%, so that it can reduce the error significantly.

Keywords: RTK-DGPS, 32 Bit Microcontroller, Precision farming

Topic: Smart Farming and Agricultural Engineering