Tessel Climate Control

A simple controller and notifier for your climate needs. The current project is based on the Tessel 2 (T2), but was tested on a Tessel 1 until the unfortunate collission of a drill bit and the T1's micro USB port.

Required Hardware

• Tessel (T1 and T2 both used for this project)
• climate module
• relay module
• CPU fan
• 12V power supply to feed the fan and the Vin/Gnd pin headers on Tessel 1. Power 12v to VIN header on Tessel (T1 only).
• 12V power supply to feed the fan and the 5V regulator to power the Tessel 2 (T2 or T1).

Required Setup

• Use Node 8.x for t1-cli. Node 12 seems to work with t2-cli
• Install the t1-cli globally, npm i -g tessel or the t2-cli via npm i -g t2-cli
• Setup wifi tessel wifi -n <ssid> -p <password>
• Fill in the env.json file with credentials
• Debug the code with t2 run index.js
• Deploy the code t2 push index.js

Gotchas

• Node 8 seemed to be the only version that allowed both t1-cli and mqtt to work even though Tessel does not appear to support Node 8 (ES6 language) features. Newer Node releases may work. All code is provided as ES6-compatible.
• The mqtt library is pegged on an old release
• ES5 code reduces the need for transpiling and bundling which may put exceed the user space limit of 30MB.
• MQTT reconnection logic may need more work