Dead simple MQTT door-sensor based on ESP8266 (ESP01) with MicroPython
Using umqttsimple.py from MicroPython-Lib
package (author: Paul Sokolovsky, license: MIT License).
A big thanks to MicroPython authors and contributors.
The ESP8266 is maintained in permanent Deep Sleep state (do not connect GPIO16 to RESET). A pulse is generated on RESET whenever the door opens and the switch closes, resulting in waking up the ESP. Once awaken, the ESP8266 connects to the Wifi, the MQTT server and then publish on a given topic before entering in Deep Sleep.
See hardware details in hardware/
folder. Schematics avaible for both:
You must use a micro-switch which is open when the door is closed and closed when the door is open.
A reed switch is not suitable.
The MQTT message include a status for the door (always "open" as the sensor cannot detect closing the door) and the VCC voltage. As soon as it drops below the regulator voltage, it means that the battery is low and should be changed/charged.
No fancy web-server!
Configuration is performed by renaming secrets_sample.py as secrets.py and entering your
parameters. Should be self-explanatory.
Build and enjoy !