https://github.com/amolenaar/brewberry-pi
Home brewery automation the smart way
https://github.com/amolenaar/brewberry-pi
brewing-beer elixir embedded firmware nerves raspberry-pi
Last synced: 6 months ago
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Home brewery automation the smart way
- Host: GitHub
- URL: https://github.com/amolenaar/brewberry-pi
- Owner: amolenaar
- Created: 2016-12-20T15:02:28.000Z (almost 9 years ago)
- Default Branch: master
- Last Pushed: 2018-03-04T19:13:05.000Z (over 7 years ago)
- Last Synced: 2025-03-28T00:41:19.258Z (7 months ago)
- Topics: brewing-beer, elixir, embedded, firmware, nerves, raspberry-pi
- Language: Elixir
- Homepage:
- Size: 593 KB
- Stars: 17
- Watchers: 2
- Forks: 4
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# Brewberry π [](https://travis-ci.org/amolenaar/brewberry-pi)
> Given a DS18B20 temperature sensor,
> a solid state relays and a wifi connector,
> automate the mash process.
At least, that's the plan.
This repo contains the code of my brewberry-π home brew software,
built with [Elixir](http://elixir-lang.org) and [Nerves](http://nerves-project.org).
Brewberry π can:
* control temperature within a 0.1 °C margin
* read, set and control the mash process with your phone (web ui)
* brewing software can be upgraded over the network
* it's firmware, so you can pull out the plug at any time
Why Elixir/Nerves? Well...
* Elixir is build on Erlang technology, making it fault tolerant by design.
* Nerves provides a basis for *real* firmware. You can just pull out the power plug without bad things happening (you do not want to try that with Rasbian).
* The system is up and running in less than 6 seconds(!) (not including wifi authentication). This is a lot faster than the 60 seconds it takes for Rasbian to boot.
* The Erlang/Elixir actor model is a natural fit for message driven applications.
An older version of the Brewberry-π written in Python is available at
https://github.com/amolenaar/brewberry-pi-python.
## Get started
* Go to the web application with `cd apps/web`
* Run `mix deps.get`
* `MIX_ENV=dev iex -S mix` will lauch the app and open a console, so you can tinker around
* Open a browser on http://localhost:3030, the (web) app will be running there in "fake" mode
## Firmware
To build an image for the Raspberry Pi (model B):
* Ensure Nerves stuff is installed on your machine, check out the Nerves getting started guide
* Go to the firmware application with `cd apps/fw_rpi`
* Install dependencies with `MIX_ENV=prod mix deps.get`
* Copy `apps/fw_rpi/config/wifi-example.exs.example` to `apps/fw_rpi/config/wifi.exs` and fix the ssid and psk properties
* Create firmware with `MIX_ENV=prod mix firmware`
* Burn to an SD card with `MIX_ENV=prod mix firmware.burn`
* And do remote updates once your first image is up and running: `MIX_ENV=prod mix firmware.push 10.192.168.122 --firmware ../../_build/rpi/prod/nerves/images/fw_rpi.fw`
## PCB
To control a brewing kettle some additional hardware is required:
- http://learn.adafruit.com/adafruits-raspberry-pi-lesson-11-ds18b20-temperature-sensing
- http://en.wikipedia.org/wiki/Solid-state\_relay
A schema is made with [Fritzing](http://fritzing.org) and is available in the file `Brouwerij.fzz`.
### Bill of Materials
| Label | Part Type | Properties |
| ----- | ------------------- | ---------------------------------- |
| - | - | PCB prototype board |
| J1 | Screw terminal | 3 pins, connector to DS18B20 |
| J2 | Power plug | connector to SSR |
| Pi1 | Adafruit Pi Cobbler | manufacturer Adafruit Industries |
| Q1 | NPN-Transistor | type NPN (EBC); package TO92 [THT] |
| R1 | 4.7kΩ Resistor | pullup resistor |
| R2 | 1kΩ Resistor | |
## Learn more
* Elixir: http://elixir-lang.com
* Nerves docs: https://hexdocs.pm/nerves/getting-started.html
* Nerves website: http://www.nerves-project.org/
## TODO
- [ ] Use bootloader from https://github.com/mobileoverlord/bootloader