Merge pull request #3074 from adafruit/soil_sensor

additional soil sensor examples

Simple_Soil_Sensor_Demos/Arduino/metroAdvSoilSensor/metroAdvSoilSensor.ino

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+// SPDX-FileCopyrightText: 2025 Liz Clark for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+
+/* Advanced Soil Sensor Demo */
+
+int sensorPin = A0;
+int onPin = 2;
+int moisture = 0;
+
+void setup() {
+  Serial.begin(115200);
+  while ( !Serial ) delay(10);
+  pinMode(onPin, OUTPUT);
+
+}
+
+void loop() {
+  digitalWrite(onPin, HIGH);
+  delay(1000);
+  // read the value from the sensor:
+  moisture = analogRead(sensorPin);
+  Serial.println(moisture);
+  digitalWrite(onPin, LOW);
+  delay(1000);
+}

Simple_Soil_Sensor_Demos/Arduino/metroSimpleSoilSensor/metroSimpleSoilSensor.ino

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+// SPDX-FileCopyrightText: 2025 Liz Clark for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+
+/* Simple Soil Sensor Demo */
+
+int sensorPin = A0;
+int moisture = 0;
+
+void setup() {
+  Serial.begin(115200);
+  while ( !Serial ) delay(10);
+
+}
+
+void loop() {
+  // read the value from the sensor:
+  moisture = analogRead(sensorPin);
+  Serial.println(moisture);
+  delay(2000);
+}

Simple_Soil_Sensor_Demos/CircuitPython_Advanced/code.py

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+# SPDX-FileCopyrightText: 2025 Liz Clark for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
+import time
+import board
+from analogio import AnalogIn
+from digitalio import DigitalInOut, Direction
+
+sensor_power = DigitalInOut(board.D5)
+sensor_power.direction = Direction.OUTPUT
+
+analog_in = AnalogIn(board.A0)
+
+while True:
+    sensor_power.value = True
+    print(f"Soil Moisture: {analog_in.value}")
+    sensor_power.value = False
+    time.sleep(5)

Simple_Soil_Sensor_Demos/CircuitPython_Simple/code.py

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+# SPDX-FileCopyrightText: 2025 Liz Clark for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
+import time
+import board
+from analogio import AnalogIn
+
+analog_in = AnalogIn(board.A0)
+
+while True:
+    print(f"Soil Moisture: {analog_in.value}")
+    time.sleep(5)