add watering unit

examples/Unit/WATERING/WATERING.ino

@@ -0,0 +1,42 @@
+/*
+    Description: Read the ADC value measured by the Watering Unit, and the water pump can be switched on and off through the middle button.
+*/
+
+
+#include <M5Stack.h>
+
+#define INPUT_PIN 36
+#define PUMP_PIN 26
+
+bool flag = true;
+int rawADC;
+
+void setup() { 
+    M5.begin();
+    M5.Lcd.setTextColor(GREEN);
+    M5.Lcd.setTextSize(3);
+    M5.Lcd.setTextDatum(TC_DATUM);
+    M5.Lcd.drawString("Watering TEST", 160, 20, 1);
+    M5.Lcd.drawString("ON/OFF PUMP", 160, 200, 1);
+    pinMode(INPUT_PIN,INPUT);
+    pinMode(PUMP_PIN,OUTPUT);
+    pinMode(25,OUTPUT);
+    digitalWrite(25,0);
+}
+
+char info[30];
+
+void loop() { 
+  rawADC = analogRead(INPUT_PIN);
+  M5.lcd.fillRect(80, 100, 240, 50, BLACK);
+  M5.Lcd.setCursor(80, 100);
+  M5.Lcd.print("ADC: "+ String(rawADC));
+  Serial.print("Watering ADC value: ");
+  Serial.println(rawADC);
+  if(M5.BtnB.wasPressed()){
+      digitalWrite(PUMP_PIN,flag);
+      flag = !flag;
+  }
+  M5.update();
+  delay(100);
+}