diff --git a/main/esp32-sensornode_main.cpp b/main/esp32-sensornode_main.cpp
index 78dfb4a..e297a56 100644
--- a/main/esp32-sensornode_main.cpp
+++ b/main/esp32-sensornode_main.cpp
@@ -34,8 +34,8 @@
 #define DB_PASSWD "c2Vuc29yczpTZW5zb3JzLXcuaW5mbHV4QGhvbWU"  // BasicAuth String
 
 #if BOARD == BOARD_ESP32
-#define BATT_FULL 2812    // TODO: get actual value
-#define BATT_CUTOFF 2280  // TODO: get actual value
+#define BATT_FULL 3600    // 3.6V VCC (4.3V Battery) TODO: get actual value
+#define BATT_CUTOFF 2300  // 2.3V VCC (3.0V Battery) TODO: get actual value
 #else
 #error "unsupported board chosen"
 #endif
@@ -183,9 +183,8 @@ extern "C" void app_main() {
   }
 
   // setup the adc for VCC measurement
-  // TODO!
   adc1_config_width(ADC_WIDTH_12Bit);
-  adc1_config_channel_atten(ADC1_CHANNEL_0, ADC_ATTEN_11db);  // 11dB ~ max 3.14V = 4069
+  adc1_config_channel_atten(ADC1_CHANNEL_0, ADC_ATTEN_0db);  // or ADC_ATTEN_2_5db
 
   /* GET VALUE SAMPLES */
   // measure environmental data from si7021