Merge pull request #2753 from adafruit/picowbell_doubler

Picowbell doubler battery monitor code

Author: TheKitty

PiCowbell_Doubler/Arduino_PiCowbell_Doubler_Battery_Monitor/.pico_rp2040.test.only

@@ -0,0 +1,25 @@
+// SPDX-FileCopyrightText: 2024 Limor Fried for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+
+#define LED    LED_BUILTIN
+
+void setup() {
+  Serial.begin(115200);
+  // while (!Serial)  delay(1);  // wait for serial port
+  pinMode(LED, OUTPUT);
+  delay (100);
+  Serial.println("PiCowbell Doubler Battery Monitor");
+
+}
+
+void loop() {
+  digitalWrite(LED, HIGH);
+  // get the on-board voltage
+  float vsys = analogRead(A3) * 3 * 3.3 / 1023.0;
+  Serial.printf("Vsys: %0.1f V", vsys);
+  Serial.println();
+
+  digitalWrite(LED, LOW);
+  delay(5000);
+}

PiCowbell_Doubler/Arduino_PiCowbell_Doubler_Battery_Monitor/Arduino_PiCowbell_Doubler_Battery_Monitor.ino

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+# SPDX-FileCopyrightText: 2024 ladyada for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
+import time
+import board
+from analogio import AnalogIn
+from digitalio import DigitalInOut, Direction
+
+led = DigitalInOut(board.LED)
+led.direction = Direction.OUTPUT
+
+analog_in = AnalogIn(board.A3)
+
+def get_vsys(pin):
+    return ((pin.value * 3) * 3.3) / 65536
+
+while True:
+    led.value = True
+    print(f"The battery level is: {get_vsys(analog_in):.1f}V")
+    led.value = False
+    time.sleep(5)