2.1.3

Author: Richard3366

examples/ESP32/WiFiLoRa32_battery_read/WiFiLoRa32_battery_read.ino

@@ -0,0 +1,40 @@
+/*  
+  ADC read voltage via GPIO1 simple test.
+  Base on Wi_Fi LoRa 32 V3.2
+  by Aaron.Lee from HelTec AutoMation, ChengDu, China
+  成都惠利特自动化科技有限公司
+  www.heltec.cn
+*/
+
+void setup() {
+  // Initialize serial communication at 115200 bits per second:
+  Serial.begin(115200);
+
+  // Set the resolution of the analog-to-digital converter (ADC) to 12 bits (0-4095):
+  analogReadResolution(12);
+
+  // Set pin 37 as an output pin (used for ADC control):
+  pinMode(37, OUTPUT);
+
+  // Set pin 37 to HIGH (enable ADC control):
+  digitalWrite(37, HIGH);
+}
+
+void loop() {
+  // Read the raw analog value from pin 1 (range: 0-4095 for 12-bit resolution):
+  int analogValue = analogRead(1);
+
+  // Read the analog voltage in millivolts from pin 1:
+  int analogVolts = analogReadMilliVolts(1);
+
+  // Print the scaled analog value (scaled by a factor of 490/100):
+  Serial.printf("ADC analog value = %d\n", analogValue * 490 / 100);
+
+  // Print the scaled millivolts value (scaled by a factor of 490/100):
+  Serial.printf("ADC millivolts value = %d\n", analogVolts * 490 / 100);
+
+  // Add a delay of 1 second between readings for clear serial output:
+  delay(1000);
+}
+
+