# Serial output

The standard serial console is not present for the Picoclick as it uses the USB-CDC interface to communicate with the processor. Writing to the standard console with `Serial.print("...")` will output the data to the UART interface which is not connected on the Picoclick.

Nevertheless there is still a way to use the Serial console. This is as easy as using `printf("...")` instead of `Serial.print("...")`. Furthermore the Serial console **don't** need to be initialized with something like `Serial.begin(X)`.

A basic example which will write the battery voltage of the Picoclick to the serial console:

```
#include <Arduino.h>
#include <WiFi.h>
#include "config.h"

void setup(){
  pinMode(BUTTON_PIN, INPUT);
  pinMode(ADC_ENABLE_PIN, OUTPUT);
  pinMode(ADC_PIN, INPUT);
  analogReadResolution(12);
  digitalWrite(ADC_ENABLE_PIN, HIGH);

  btStop();
  WiFi.mode(WIFI_OFF);

  FastLED.addLeds<APA102, APA102_SDI_PIN, APA102_CLK_PIN, BGR>(leds, NUM_LEDS).setCorrection(TypicalLEDStrip);
  FastLED.setBrightness(160);
  delay(50);

  set_fastled(CRGB::Blue);

  printf("Setup done!\r\n");
}

void loop() {
  printf("Battery voltage: %i mV\r\n", int(get_battery_voltage()));
  delay(500);
}
```

Make sure that you don't forget to add the carriage return (`\r`) and the line feed (`\n`) to the end of the string.

To open the serial monitor in PlatformIO you have to press the button with power adapter in the bottom left corner.