Published August 3, 2017

Thermopile

Thermostat based on Raspberry Pi 3 running Android Things with touchscreen support.

AdvancedWork in progress4,168

Things used in this project

Hardware components

Raspberry Pi 3 Model B

Raspberry Pi Touch Display

Adafruit Bosch BME280

Adafruit TSL 2561

Software apps and online services

Google Android Things

Story

ScreenSaver in standby mode

Work in progress thermostat project called Thermopile.

Fully operational in terms of controlling the heater unit. Design will change and evolve over time. Sensor array is a fully operational Bosch BME280 with temperature, humidity and pressure readings.

A schedule per week day can be set. Also it is not a simple bang bang controller but has a (not yet calibrated) PID logic of gradually increasing temperature if needed and when needed.

Main screen

RxJava2 with Requery SQL database and plain old Java is used. All UI components are simple Android Fragments, TextViews and so on.

Official 7'' LCD is controlled via Adafruit TSL2561 Digital Luminosity/Lux/Light Sensor. I plan to add more features like Nearby API, BLE, WiFi status and some other indicators, design and enclosure.