A sourdough starter monitor. A distance sensor measures how much the starter has risen and plots its growth over time on a small OLED display embedded in a wooden lid sitting on top of the jar. Prototyped on a Raspberry Pi in Common Lisp, then rewritten in C and compressed onto an Arduino.
# install arduino-cli
curl -fsSL https://raw.githubusercontent.com/arduino/arduino-cli/master/install.sh | sh
# install core for nano
arduino-cli core update-index
arduino-cli core install arduino:avr
# compile and upload
make
make upload # or upload_old depending on the version of the bootloader
- Add hour markings on the graph
- Screen refresh rate slows down with increasing number of samples - investigate and optimize
-
Download and install Raspbian Stretch Lite
-
Enable SSH
touch /Volumes/boot/ssh
- Enable and configure WiFi
country=US
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
network={
ssid="my SSID"
psk="my password"
}
- Install DHT11 driver
- Install Python 3
sudo apt-get install python3
- Install vl6180 driver
- Enable I2C
sudo raspi-config
- Install Common Lisp (Clozure - armcl)
sudo apt-get install libiw-dev armcl
- Set up a daemon
cp panometer.service /etc/systemd/system/
sudo systemctl enable /etc/systemd/system/panometer.service
sudo systemctl start panometer.service