RPi Garden - small project to take care of Lily

README.md

RPi Garden

Lily is a succulent. She likes water, but not too much 🌵

rpi-garden is a raspberry pi project to take care of Lily.

Dockerfile

# Build dependencies
FROM python:3.7-alpine AS build
RUN apk update && apk add build-base
COPY requirements.txt /tmp/requirements.txt
RUN pip install --install-option="--prefix=/requirements" --requirement /tmp/requirements.txt

# Build runtime image
FROM python:3.7-alpine
COPY --from=build /requirements /usr/local
COPY garden.py /usr/local/bin/garden
CMD [ "garden" ]

garden.py

#!/usr/bin/env python
"""
Long life the plant!
"""

# Project dependencies
from datadog import api, initialize
from sys import exit

import RPi.GPIO as GPIO
import os
import time

# Global variables
INPUT_PIN = 17
SLEEP_DURATION = 60
WATER_PIN = 27
WATER_WAIT = 15


# Main function
def main():
    # Init datadog and crash if api key is missing
    options = {
        "api_key": os.environ["DATADOG_API_KEY"],
    }
    initialize(**options)

    # Init gpio
    GPIO.setmode(GPIO.BCM)
    GPIO.setup(INPUT_PIN, GPIO.IN)
    GPIO.setup(WATER_PIN, GPIO.OUT)

    # Init pump
    timer = 0

    # Read, refresh, loop
    while True:
        api.Metric.send(
            metric="rpi.garden.moisture.heartbeat",
            type="count",
            interval=SLEEP_DURATION,
            points=1,
            host="rpi1",
            tags=["version:3"],
        )

        value = GPIO.input(INPUT_PIN)
        api.Metric.send(
            metric="rpi.garden.moisture.digital",
            type="count",
            interval=SLEEP_DURATION,
            points=value,
            host="rpi1",
            tags=["version:3"],
        )

        if value == 0 and timer == 0:
            GPIO.output(WATER_PIN, True)
            timer = WATER_WAIT
        elif timer > 0:
            GPIO.output(WATER_PIN, False)
            timer -= 1

        api.Metric.send(
            metric="rpi.garden.moisture.timer",
            type="count",
            interval=SLEEP_DURATION,
            points=timer,
            host="rpi1",
            tags=["version:3"],
        )

        print(f"{time.asctime()} - sent value={value} timer={timer}, going to sleep for {SLEEP_DURATION}s...")
        time.sleep(SLEEP_DURATION)


if __name__ == "__main__":
    try:
        print(f"{time.asctime()} - starting garden now !")
        main()
    except (KeyboardInterrupt, SystemExit):
        print(f"{time.asctime()} - stopping garden now !")
        exit(0)

requirements.txt

datadog==0.28.0
RPi.GPIO==0.6.5

setup.cfg

[flake8]
exclude = .git
ignore = E501