This project based on the DS18B20 ESP32 one Wire Bus Application video and blog ESP32 one Wire Bus Application – DS18B20 section article, to use ESP32 to send the temperature of DS18B20 to NodeRED through the serial port. Three modes are designed in the code, DS18B20_ON, DS18B20_OFF and NodeRED modes.

the ESP32 code is placed on my blog :
https://wwwwinson.blogspot.com/2023/...
#NodeRED #esp32 #arduinoide2 #arduino #temperaturesensor #ds18b20 #nodejs