Ag IoT 101: Read Soil Moisture

How computer works?

Reference: Wikipedia

Reference: https://www.gsnetwork.com

Reference: Wikipedia

Reference: https://www.notebookcheck.net

Reference: https://www.espressif.com

Reference: https://lastminuteengineers.com

Reference: https://www.raspberrypi.com

Reference: Nvidia

Capacitive Soil Moisture Working Principle

Reference: https://wemakethings.net

Capacitive Soil Moisture

Reference: https://rbaron.net

Analog Input and Analog-Digital Convertor (ADC)

Reference: https://www.microcontrollerboard.com

Reference: https://lastminuteengineers.com

```c++ [2|4|14-16|17-19|21-23]
            #define LED 2          // On-board LED
            #define SOIL_SENSOR 13 // pin for soil sensor

u_int16_t raw_soil_moisture;  // for 12bit ADC

void setup() {
              // put your setup code here, to run once:
              Serial.begin(9600); // setup serial terminal.
              pinMode(LED, OUTPUT); // Initialize LED
            }

void loop() {
              // put your main code here, to run repeatedly:
              raw_soil_moisture = analogRead(SOIL_SENSOR);
              Serial.print("Raw soil moisture value = ");
              Serial.println(raw_soil_moisture);
              if (raw_soil_moisture > 3000) {
                Serial.println("Soil is dry");
                digitalWrite(LED, LOW);
              }
              else {
                Serial.println("Soil is good");
                digitalWrite(LED, HIGH);
              }
              delay(1000); // delay 1 second
            }
            ```

Questions?

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