Rancang Bangun Timbangan Digital Berbasis Nodemcu Esp8266 Dengan Fitur Kirim Data Berat Melalui Smartphone

Abstract

Along with the advancement of globalization, there is a demand for digital scales that can be integrated into smart devices. The purpose of this research is to develop digital scales with higher accuracy and a lower error rate. This research was conducted using the design and development method. During the measurement process, the load cell detects the weight of the object and converts it into an electrical signal using the HX711 as a signal amplifier. ThingSpeak and Telegram provide more accurate and consistent measurements and send data to the smartphone every 3 seconds to Telegram and every 15 seconds to ThingSpeak, in accordance with the minimum data transmission requirements. The precision/coefficient of variation value is 0.184% average difference using a load of 6.559 grams, the mean error value of the load cell sensor is 0.357%, and the mean accuracy of the load cell sensor reading is 99.6%.