Hallo, so, I got an Arduino to take the place of my Raspberry Pi. It’s more hardware oriented and therefore more geared towards the RPi projects I mentioned earlier.
So, my first goal is to create a moisture sensor.
This is done using the analogue pins.
Analogue pin 0, A0, is held low by a 10kohm resistor, Above this is one wire of the sensor. From the +ve rail is the other wire of the sensor. Currently the sensor is simply 2 bits of wire and the moisture is read from my fingers. But in the final prototype it will be read off of 2 nails stuck in the soil.
This is the code I used, it echos the reading back over the serial port to the computer.
const int sensorPin = A0;
int sensorVal = analogRead(sensorPin);
Refresh rate is 1/2 a second.