MQTT Logger Sample Code

Required

• M5StickC board []
• Arduino IDE development environment
  • Installation: https://www.arduino.cc/en/Main/Software
  • install ESP32 boards in Arduino IDE: https://www.instructables.com/id/Getting-Started-With-ESP32-Installing-ESP32-Boards/

Installation

• clone this repository
• copy settingsexample.h to settings.h to start
• fill in wifi and mqtt settings in settings.h
• in IDE:
  • Tools > Board -> M5Stick-C
  • Tools > PArtition Scheme -> NO OTA (Large APP)
• compile & flash to the M5Stick

Handy

• HiveMQ has a free MQTT server @ broker.hivemq.com / 1883
• use a MQTT client to test
  • publish to sensor /
    • send QR code with QR060HELLOWORLD
    • change channel with CH04
  • subscribe on sensor

References

• MQTT pubsubclient library: https://pubsubclient.knolleary.net/api#state
• m5StickC board info:
• M5StickC Arduino library: https://docs.m5stack.com/#/en/arduino/arduino_api
• MQTTfx client: https://mqttfx.jensd.de/