Simple test of voltage measurement.

src/main.cpp

@@ -31,6 +31,11 @@ AsyncWebServer server(80);
 const int keyer = 32;
 const int blinker = LED_BUILTIN;
 
+// Battery voltage monitor
+const int voltage_pin = 33;
+int voltage_pin_value = 0;
+
+// RTC connections
 RTC_DS3231 rtc; // set up RTC
 const int alarmPin = 4; // pin to monitor for RTC alarms
 
@@ -616,6 +621,13 @@ void setup() {
 
 void loop() {
 
+  // For testing, print the value returned from the voltage circuit.
+  // This is not voltage, and needs to be scaled to the battery. See KB1OIQ's solution.
+  voltage_pin_value = analogRead(voltage_pin);
+  Serial.println(voltage_pin_value);
+  
+
+
   // This statement from https://github.com/garrysblog/DS3231-Alarm-With-Adafruit-RTClib-Library/blob/master/DS3231-RTClib-Adafruit-Alarm-Poll-alarmFired/DS3231-RTClib-Adafruit-Alarm-Poll-alarmFired.ino
   // Check if alarm by polling SQW alarm pin
   if((yourInputSend == 2) & (digitalRead(alarmPin) == LOW)) {