How to use custom libraries and show sensor data on display, serial, and send via MQTT.

[vdj69]

Question
I need your help to understand how to add custom libraries and where to write code for using it. For example, I want to add an LCD library and i2c based sensor library then I want to fetch the I2c sensor data and show the data to the LCD and serial. At last, send the data via MQTT?

Device information
ESP8266-E

• Desktop operating system
  Windows10

• Browser & version
  Chrome

• IDE & version
  PlatformIO

[mcspr]

Check out:
#2345 (comment)
https://github.com/xoseperez/espurna/blob/dev/code/espurna/sensors/DummySensor.h

edit: for the display part, perhaps see #2319
thermostat is a rough approach. but, you can also check out how domoticz integration works with the sensor data

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions.

[stale]

This issue will be auto-closed because there hasn't been any activity for two months. Feel free to open a new one if you still experience this problem.