ADC for esp32

platformio.ini

@@ -15,6 +15,7 @@ framework = arduino
 lib_deps = 
 	bodmer/TFT_eSPI@^2.5.43
 	bodmer/JPEGDecoder@^2.0.0
+lib_extra_dirs = ./embedded-pio
 
 build_flags = 
 	-D USER_SETUP_LOADED

src/main.cpp

@@ -1,20 +1,43 @@
+#include "adc_esp.h"
 #include <Arduino.h>
-#include "display.h"
+
+int voltage;
+
+ESP32_ADC_Config config;
+
+int gpio_pin = 4;  // Example: GPIO4
+adc_unit_t unit;
+adc_channel_t channel;
 
 void setup() {
-  Serial.begin(115200);
-  Serial.println("Starting...");
-  initDisplay(false);
-
-  // drawSdJpeg("/bsr/Jonathan.jpeg", 130, 0);
-  HeapAnim();
-  Serial.println("Setup done.");
+    // 1. Initialize ADC unit
+    config.unit = ADC_UNIT_2;
+    config.width = ADC_WIDTH_BIT_12;
+    config.attenuation = ADC_ATTEN_11db;  // For full 0-3.3V range
+    config.vref = 1100;  // Default reference voltage (1.1V)
+
+    esp32_adc_init(&config);
+
+    // 2. Determine ADC channel for GPIO pin
+
+    esp32_adc_gpio_to_channel(gpio_pin, &unit, &channel);
+
+    // 3. Configure the specific ADC channel
+    esp32_adc_config_channel(unit, channel, config.attenuation);
+
+    // Now you can read from this ADC pin
+    int raw_value = esp32_adc_read_raw(unit, channel);
+    voltage = esp32_adc_read_voltage(unit, channel, &config);
+
+    Serial.begin(115200);
+    Serial.printf("hello world\n");
+    Serial.printf("Raw ADC Value: %d\n", raw_value);
 }
 
 void loop() {
-  // rotateColors();
-  // delay(42);
-  // drawSdJpeg("/test.jpg", 0, 0);
-
-  // HeapAnim();
-}
+  int raw = esp32_adc_read_raw(unit, channel); 
+  Serial.printf("Voltage: %d mV\n", voltage);
+  Serial.printf("Raw ADC Value: %d\n", raw);
+  delay(1000);
+  voltage = esp32_adc_read_voltage(unit, channel, &config);
+}