This project aims to notify me when my washer or dryer finished it's cycle. The hardware contraption that goes with it is looks as follows:
Basically it's two circuits of 200K LDRs and 1uF capacitors. We discharge the capacitor by pulling the GPIO pin low, then wait for it to charge again. The faster the GPIO pin rises, the more light is sensed by the LDR.
This project is built with Nerves, a platform/framework/toolchain that leverages Elixir for embedded applications. It targets the Raspberry Pi Zero and notifications are sent using Pushover.
To compile the application:
- Install dependencies with
mix deps.get - Create firmware with
mix firmware - Burn to an SD card with
mix firmware.burn