Documentation Status

MQTT sensor project for CoffeeBin.


  • It uses deep sleep ,ode to save energy.
  • It messures the volatage on bootup an send the result as MQTT message to the broker.
  • It has an external status LED
  • It has an switch to broadcast an MQTT message, that the coffe machine is in maintenance mode.


  • ESP8266 ESP12F
    • Flash Size: 32 Mbit
    • Flash Mode: DIO
    • Flash Speed: 40 MHz
  • LED
  • Switch
  • Voltage sensor



Install the USB driver for your ESP8266 and find out on which port your device is avaible. For convinience you can save that information in your ~/.bashrc or ~/.bash_profile file.

If you don’t wanna do that, you have to add the port to each command.

mos --port /dev/cu.SLAB_USBtoUART COMMAND


You need to install Docker to build it locally.

git clone
cd coffee-bin-mqtt
mos build --platform ESP8266 --local --verbose
mos flash --esp-erase-chip --esp-baud-rate 115200 --esp-flash-params "dio,4m,40m"

Debugging and configuration

mos wifi --port /dev/cu.SLAB_USBtoUART WIFI-SSID WIFI-PASSWORD
mos console --port /dev/cu.SLAB_USBtoUART

Upload files

mos put --port /dev/cu.SLAB_USBtoUART fs/init.js