Watering system for a few plants. The main component is WiFi module NodeMCU with ESP12E (ESP8266).
The device contains two switching parts for pump/valve or another device.
Websites:
(CZ) https://chiptron.cz
(EN) https://time4ee.com
Important components:
Relays (Coil Resistance 500 ohm, Nominal Coil Voltage 5 VDC, Switching Voltage 200 VDC, Switching Current 0.5 A) https://www.gme.cz/data/attachments/dsh.634-072.1.pdf
Transistors (Ultra Low On-Resistance, N-Channel MOSFET, using for switching from GPIO) https://www.infineon.com/dgdl/irlml2502.pdf?fileId=5546d462533600a401535667f44d2602
Description of device:
NodeMCU watering system includes two outputs (through relays), it can switch water pump, valve or another device. NodeMCU contains one analog input for measurement of soil moisture.
The device contains pin header for connecting of temperature/humidity sensor (by I2C) like Si7021, two LEDs which can be used for indication.
The watering system can be powered by external power supply (the board contains 7805 voltage regulator).
petus/NodeMCU_watering_system
Watering system for a few plants. The main component is WiFi module NodeMCU with ESP12E (ESP8266).
Eagle