* this project based on a ESP8266 ESP-07S WiFi Modul * it supports 4 water circles (i use [Rainbird (DV-SERIES)](https://www.rainbird.eu/products/valves/dv-series) Valve) * to save water on rainy days, it supports a [Rain Sensor from Rainbird](https://www.rainbird.eu/products/accessories/rsd-bex) * 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](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](https://www.pololu.com/product/2569) In my project, I operate the circuit board via solar / battery, i.e. autonomously. The following components that I still used. * [Solarpanel](https://www.amazon.de/dp/B01BKHE764/) * [Battery Solar Charger](https://www.amazon.de/gp/product/B079T7FRNN/) * [Battery](https://www.amazon.de/gp/product/B00F2J41IQ/) * [Case](https://www.conrad.de/de/p/spelsberg-tg-abs-2015-9-o-installations-gehaeuse-202-x-152-x-90-abs-lichtgrau-ral-7035-1-st-532735.html) * [Mounting Plate](https://www.conrad.de/de/p/spelsberg-tg-mpi-2015-montageplatte-l-x-b-x-h-171-x-143-x-2-5-mm-isolierstoff-1-st-534806.html) # 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