A raspberry pi project to automate my irrigation system mainly based on a raspberrypi and rain bird dv100 24vac solenoid valves
Last Update : 16/10/2023
This is the first working version for summer 2023, it will be adapted for 2024.
Main Goal : replace one or more irrigation controllers and do it by mylself.
Big Concept :
- Logic is done by python scripts on the rpi
- Data management is done with an sql data base, mqtt, json, yaml
- UI is based on a web application or in Home Assistant
- Sensors data comes from home-assistant/esphome
Overall functional descriptions :
- A WebApp allows me to manage each solenoid valve/zone, global parameters, see the latest events, the watering sequence and some data.
- A collection of python scripts are used to open or close the solenoid valves and compute the watering sequence
- There is a winter/stop, test, , sequence on demande, automatic and domotic/manual mode
- The program checks some data to know if it can run watering
- Each change is logged
- status are logged and send to an mqtt brocker
- Errors and status are displayed on an lcd
- The raspberry pi can run the irrigation without lan network and internet. In that case, json files are used for the configuration but it is impossible to change anything.
- config.yaml file is used to configure the script in addition with the database.
- I can bypass the programmation to directly power supply and open any solenoid valve I want with 3 positions switch wired for each solenoid valve.
- Monitoring and filling of the tank are managed by home assistant (see side projects)
- There is also a first implementation of mqtt to exchange data with home-assistant
Folder organisation :
| IrriPi
=> | App ( SqlDatabase and WebApp(php,html,css,js) )
| Doc (img / Schematic / Diagram / Fritzing parts / Useful docs for the project )
| rpi (python scripts)
readme.md
Raspberry Pi requirements :
Config.txt :
In the event of an unexpected restart, this will allow not to open a solenoid valve by mistake.
I need to add the following to the config.txt file to force gpio output and high state on gpio during the boot sequence :
gpio=4-13=op,dh
gpio=16-27=op,dh
Gpio 2,3 are used for I2C (rtc and lcd)
Gpio 14-15 are reserved and cannot be used !
=> 22 gpio are therefore usable
Cron :
- start the main.py at startup
- start the mqtt_subscribe.py at startup
- in contrab -e:
@reboot sleep 20; sh /home/pi/launcher_arrosage.sh
Raspi-config :
- i2c must be activated (rtc + lcd)
- spi must be deactivated
Functional Diagram :
Electric Parts
- 1x Circuit breaker 2A 230v
- 1x Electrical outlet 230v
- 1x AC 24v 1,6A output rail din power supply (for solenoid valves) links
- 1x DC 5v 2.5A output power supply (for raspberry, esp8266, relay, electronic)
Electronics Parts
- Raspberry Pi 2b + micro sd
- 22x relay 5v
- 22x button 3 positions
- 1x button 2 positions
- 23x Screw Fuse Terminal Block rail din links
- 22x fuse 20x5 0.5A
- 1x fuse 20x5 2A
- 1x lcd 20x4 i2c 5v
- 1x rtc module DS3231 i2c 5v
Web App :
The web app :
Schematic :
Side projects (in progress) :
- Tank filling with esphome and home-assistant link
- [in progress] tank monitoring with esphome and home-assistant link
- Irrigation circuit monitoring with esphome and home-assistant link
Incomplete Work :
- mqtt
- web ui
- logging
- lcd
- code
Futur improvements :
- Improve WebUI
- Multiple sequence
- Add condition with rain meter
- Improve code / mqtt
- Clean the box with good cable management
Integration in Home-Assistant **
