Monitor and control fridge with 3 Dallas 1 wire temperature sensors and the fridge light
| Filename | Description |
|---|---|
| rrdrool-init.sh | initializes the rrdtool database |
| templogger.py | run every minute to control the light & update rrd |
| temp_sensor.py | python library to read temp sensors |
| gpio_sensor.py | python library to toggle gpio bits (and read, untested) |
| crontab-templogger | example crontab to call templogger.py every minute |
| code.py | python web.py app for displaying temperature graphs |
| rc.local | set up GPIO 22&27 in /sys directory |
| socketserver.py | server that returns all temp values and GPIO states |
| socketclient.py | client to connect to the above server |
| read_all.py | read all temps and return on command line |
| light_on.py | manually turn on light |
| light_off.py | manually turn off light |
| controller.py | latest implementation of control + server |
| controller_mqtt.py | latest implementation of control + server + cayenne mqtt |
Other files are some tests, alternate methods of reading dallas 1-wire temp
Install python-webpy, python-rrdtool, rrdtool using apt.
- GPIO 27 controls the fridge light (+3.3V -> light on)
- GPIO 4 is the dallas 1wire bus
- GPIO 22 may some day be the fridge door open sensor
- GPIO 23 may some day be the freezer door open sensor
- pin 1, 3V3 for dallas 1wire
- pin 7, GPIO 4 for dallas wire
- pin 9, GND for dallas 1wire
- pin 13, GPIO 27 for fridge light solid state relay
- pin 14, GND for fridge light SSR
There is a pullup resistor between 3V3 and the D1W signal (GPIO 4)