Collect Environmental Sensor Data

Challenge

Write a program to read measurements from one of the environmental sensors and publish the readings to the MQTT broker.

Details

• Measurements should be taken once per minute
• Each measurment should be published to the data/<id>/<measurement> topic
  • <id> is a unique identifier for the device, you can hard code a constant for this in the program
  • <measurement> is the type of value (i.e. "temperature", "humidity", "barometric pressure", etc)
• Messages should use the format <value> <units>

Bonus

In addition to publishing readings, the program should handle control messages

• The program should subscribe to the control/<id>/led topic
• When a message containing "on" is received the builtin LED should be turned on
• When a message containing "off" is received the builtin LED should be turned off