Category: Technical

IoT Home Thermostats – NEST and now connects and logs your home thermostat data!

Your NEST thermostat is likelyWiFi connected. can be authorized by interfacing through NEST to read your thermostat data!

By adding a new Thing, you can link your NEST thermostat and will record your NEST data such as how much you are heating, what the temperature is, what the humidity is, etc.

Potential use cases:

  • Monitor how many hours your furnace has been on so you know when to order more heating fuel
  • Monitor the rate your home loses heat to learn how well insulated your home is
  • Keep a record of the temperature or humidity in your home

Features being added in the future:

  • Connect to Honeywell thermostats
  • Download your data
  • More advanced alerts
  • Advanced temperature control events triggered on any IoT data

Base station development progress

The central gateway for the network is the base station.  Now working is a color LCD touch display for the base station, with a WiFi module, and a local radio communications module which connects to the sensor and control networks on the ultra low power wireless network.


In the above figure, at the bottom is the microcontroller (MCU) based on the ESP 8266 system on a chip, which includes 802.11 b/g/n WiFi standards.  The display will show the user interface which is under development and is a touch screen, which enables the user to configure and set options.  To the top right the low power wireless radio is shown, which is used to interface to the local sensor network, and control network.

At this point, the hardware for the base station is basically complete, and the primary work at this point is in further developing the software both on the embedded MCU, for the web-based service, and for the mobile applications.

Temperature and humidity sensor

The new temperature and humidity modules have arrived!


These modules have an on-board 8-bit processor to ensure the readings are calibrated.  They have low power consumption making them ideal for the sensor node application.  They consume 0.3 mA when taking a measurement, but only 60 pico Amps in standby!

Another step closer to putting the sensor node together.  All of the basic parts are now ready, except for the power supply.  Progress is being made on that as well.