• this project based on a ESP8266 ESP-07S WiFi Modul
• it supports 4 water circles (i use Rainbird (DV-SERIES) Valve)
• to save water on rainy days, it supports a Rain Sensor from Rainbird
• 4V-16V DC are necessary for the power supply. 12V are optimal.
• for a suitable control, look under my GIT Project (https://github.com/DerDreher/garden-irrigation-system) atm only in German
• one module must be purchased for the 24V valves Pololu 24V Step-Up Voltage Regulator U3V50F24

In my project, I operate the circuit board via solar / battery, i.e. autonomously. The following components that I still used.

• Solarpanel
• Battery Solar Charger
• Battery
• Case
• Mounting Plate

Current informations

• I am working on an English version of the software [20.05.2022]

Changelog

V1.3 (red circuit board color)

• New layout on the same board dimensions
• Added 10k resistors to eliminate a short HIGH signal when ESP (re)boot
• Added diodes to protect against coils self-induction

V1.2 (black circuit board color)

• more a software change
• was never produced, but was theoretically used for further development

V1.1 (white circuit board color)

• Change many elements to SMD (smaller board)
• Power supply changed from 3.7V LiPo to 12V lead (to high current for TP4056)
• fixed a problem with incorrectly connected temperature sensor
• fixed a problem with incorrectly calculated voltage dividers

V1.0 (green circuit board color)

• First circuit board with through hole Elements
• Since water valves have to be controlled with a pulsed signal, the railes were exchanged for Mosfet circuit

First ideas

• First draft on a breadboard with a relay as a switch for water valves
• Power supply with 3.7V LiPo via TP4056 and a 5V solar panel