diff --git a/platformio.ini b/platformio.ini
index a08d4c75..72a8988d 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -11,10 +11,10 @@
 
 ; ---> SELECT TARGET PLATFORM HERE! <---
 [platformio]
-env_default = heltec
+;env_default = heltec
 ;env_default = ttgov1
 ;env_default = ttgov2
-;env_default = ttgov21
+env_default = ttgov21
 ;env_default = lopy
 ;env_default = lopy4
 ;env_default = fipy
@@ -27,7 +27,6 @@ description = Paxcounter is a proof-of-concept ESP32 device for metering passeng
 platform_espressif32 = espressif32@>=1.0.1
 board_build.partitions = no_ota.csv
 board_upload.maximum_size = 2097152
-monitor_speed = 115200
 lib_deps_display =
     U8g2@>=2.22.14
 lib_deps_rgbled =
@@ -52,6 +51,8 @@ framework = arduino
 board = heltec_wifi_lora_32
 board_build.partitions = ${common_env_data.board_build.partitions}
 board_upload.maximum_size = ${common_env_data.board_upload.maximum_size}
+monitor_speed = 115200
+upload_speed = 115200 
 lib_deps = 
     ${common_env_data.lib_deps_display}
 build_flags = 
@@ -64,6 +65,7 @@ framework = arduino
 board = esp32dev
 board_build.partitions = ${common_env_data.board_build.partitions}
 board_upload.maximum_size = ${common_env_data.board_upload.maximum_size}
+monitor_speed = 115200
 upload_speed = 115200 
 lib_deps = 
     ${common_env_data.lib_deps_display}
@@ -77,6 +79,7 @@ framework = arduino
 board = esp32dev
 board_build.partitions = ${common_env_data.board_build.partitions}
 board_upload.maximum_size = ${common_env_data.board_upload.maximum_size}
+monitor_speed = 115200
 upload_speed = 921600
 lib_deps = 
     ${common_env_data.lib_deps_display}
@@ -90,6 +93,7 @@ framework = arduino
 board = esp32dev
 board_build.partitions = ${common_env_data.board_build.partitions}
 board_upload.maximum_size = ${common_env_data.board_upload.maximum_size}
+monitor_speed = 115200
 upload_speed = 921600
 lib_deps = 
     ${common_env_data.lib_deps_display}
@@ -103,6 +107,7 @@ framework = arduino
 board = esp32dev
 board_build.partitions = ${common_env_data.board_build.partitions}
 board_upload.maximum_size = ${common_env_data.board_upload.maximum_size}
+monitor_speed = 115200
 upload_speed = 921600
 lib_deps = 
     ${common_env_data.lib_deps_rgbled}
@@ -116,6 +121,7 @@ framework = arduino
 board = esp32dev
 board_build.partitions = ${common_env_data.board_build.partitions}
 board_upload.maximum_size = ${common_env_data.board_upload.maximum_size}
+monitor_speed = 115200
 upload_speed = 921600
 lib_deps = 
     ${common_env_data.lib_deps_rgbled}
@@ -129,6 +135,7 @@ framework = arduino
 board = esp32dev
 board_build.partitions = ${common_env_data.board_build.partitions}
 board_upload.maximum_size = ${common_env_data.board_upload.maximum_size}
+monitor_speed = 115200
 upload_speed = 921600
 lib_deps =
     ${common_env_data.lib_deps_rgbled}
@@ -142,6 +149,7 @@ framework = arduino
 board = lolin32
 board_build.partitions = ${common_env_data.board_build.partitions}
 board_upload.maximum_size = ${common_env_data.board_upload.maximum_size}
+monitor_speed = 115200
 upload_speed = 256000
 lib_deps = 
     ${common_env_data.lib_deps_rgbled}
@@ -155,6 +163,7 @@ framework = arduino
 board = lolin32
 board_build.partitions = ${common_env_data.board_build.partitions}
 board_upload.maximum_size = ${common_env_data.board_upload.maximum_size}
+monitor_speed = 115200
 upload_speed = 921600
 lib_deps = 
     ${common_env_data.lib_deps_rgbled}
diff --git a/src/adcread.cpp b/src/adcread.cpp
index 2d3572bc..d7300667 100644
--- a/src/adcread.cpp
+++ b/src/adcread.cpp
@@ -55,9 +55,13 @@ uint16_t read_voltage(void)
     //Check if Two Point or Vref are burned into eFuse
     check_efuse();
 
+    //Configure GPIO used fpr ADC1
+    gpio_set_direction(GPIO_NUM_35, GPIO_MODE_INPUT);
+
     //Configure ADC1
-    adc1_config_width(ADC_WIDTH_BIT_12);
-    adc1_config_channel_atten(channel, atten);
+    ESP_ERROR_CHECK(adc_gpio_init(unit, (adc_channel_t) channel));
+    ESP_ERROR_CHECK(adc1_config_width(ADC_WIDTH_BIT_12));
+    ESP_ERROR_CHECK(adc1_config_channel_atten(channel, atten));
 
     //Characterize ADC1
     esp_adc_cal_characteristics_t *adc_chars = (esp_adc_cal_characteristics_t *) calloc(1, sizeof(esp_adc_cal_characteristics_t));