Finally all parts arrived and my irrigation sensor is now ready. I took my ESP8266 Breakout Board as basis. During soldering works I realized that there are some details missing in my breakout design (mainly missing designations). Therefore I have updated its design as well (Github). Using the XCSOURCE FT232RL 3.3V 5.5V FTDI USB zu TTL Serielles Adaptermodul Arduino Mini Anschluss TE203 and the soldering jumper there is no need for the “PROG” button. It is handled by the converter it self. I use the same sonsors I have used for the prototype (MTS1EU Greenhouse Sensor Kit Soil Hygrometer Module and DHT11 Temperature/Humidity Module for Arduino. Gewächshaus Pflazen .)
I use a small 5V / 81mA solar panel from Conrad. The panel drives very little current so I don’t need to care about charging logic. A simple Zener diode (BZX85C3V9) should be enough. I also changed the transistor to a PNP type as some of my readers recommended. Also the GPIOs I use have changed due to layout reasons. I have put the latest version of Fritzing and code on my Github.
So thats what the result looks like.
