PlatformIO IDE ESP-IDF ESP32 ESP-MQTT example

Adafruit IO

I used:

• Simple library for single DS18B20 on ESP32 https://github.com/feelfreelinux/ds18b20
• ESP-MQTT sample application https://github.com/espressif/esp-idf/tree/master/examples/protocols/mqtt/tcp

This code sends data every 10 seconds on io.adafruit.com. I used ds18b20 to get temperature and send it.

You need to set next parametrs:

• DS_PIN - GPIO where you connected ds18b20
• WIFI_SSID - SSID of your WIFI network
• WIFI_PASS - password of your WIFI network
• BROKER_URL - mqtt://login:aio_xxx@io.adafruit.com
  • where
  • login - Your AdafruitIO Username
  • aio_xxx - Your AdafruitIO Key
• IO_TOPIC login/feeds/name_feed
  • where
  • login - Your AdafruitIO Username
  • name_feed - Your AdafruitIO Feed name