laundry learn daemon

This daemon is running on a laundry learn raspberry pi and acts as a whole management daemon. It handles GPIO, detects the state of the laundry machine and also posts live data to MQTT. It runs in as a finite statemachine to map the laundry machine states and it will handle the different machine learning scripts (python with scikit-learn) to determine a final approximation for the laundry machine runtime.

sudo cp llearnd.service /etc/systemd/system
sudo ./install.sh
systemctl enable llearnd.service
systemctl start llearnd.service

This is the llearnd main program. It handles:

• system functionality (daemon mode, syslog, error handling, signals)
• machine state detection
• intern statemachine handling
• MQTT Broker connection

When started, the daemon handles typical system functionality like commandline arguments and init of syslog and hardware modules. After that it changes into statemachine mode. This statemachine has following states:

This state is chosen, when the laundry machine is not running. This state has not further logging. It reports the machine state to the MQTT Broker every 30 seconds.

This state is called, when the machine started to wash. It's purpose is to create a logfile and start a machine learning script to approximate a machine runtime. It then automatically switches to stmRun mode.

When the laundry machine is running, the statemachine is in stmRun mode. This state posts current machine stats to the MQTT broker and also logs all sensor data into a logfile every second.

When a laundry machine run has ended, the PostProcess state will be called. Postprocessing means, that the logfile will be closed, copied to a backup location, analyzed and used as training data for the machine learning function. After that, the state automatically switches to stmWait

These files handle the MPU6050 3-axis-accelerometer and gyrometer. This module is connected via I2C bus and used to determine a shakeValue (when machine is in spin-mode) and the state of the rotary switch, which sets the running mode of the laundry machine (Kochwäsche/Pflegestufe/Temperatur etc.).

This is a temperature and humidity sensor which is also connected via SPI. It has no special purpose besides detecting the room temperature and humidity.

bash script to save and upload a logfile

A python script which processes logfiles and tries to determine a remaining runtime for the laundry machine.