ESP32C3 Not Printing to Serial Monitor

Development Boards ESP32
1

Hi,

I’m trying to connect a Qwiic Joystick to an ESP32C3, however nothing is printing to the Serial monitor. With the sketch below, the LED turns on, but nothing prints:

#include <Wire.h>
#include "SparkFun_Qwiic_Joystick_Arduino_Library.h" //Click here to get the library: http://librarymanager/All#SparkFun_joystick
JOYSTICK joystick; //Create instance of this object

void setup() {
  delay(5000);

  pinMode(10, OUTPUT);
  digitalWrite(10, HIGH);

  Serial.begin(9600);
  Serial.println("Qwiic Joystick Example");

  if(joystick.begin() == false)
  {
    Serial.println("Joystick does not appear to be connected. Please check wiring. Freezing...");
    while(1);
  } else {
    Serial.println("Connected");
  }
}

void loop() {
  Serial.println("test");
  
  Serial.print("X: ");
  Serial.print(joystick.getHorizontal());

  Serial.print(" Y: ");
  Serial.print(joystick.getVertical());
  
  Serial.print(" Button: ");
  Serial.println(joystick.getButton());

  delay(200);
}
2

Try this:

1 Like
3

This post might be useful too.

1 Like
4

Thanks for your response, however I was unable to resolve this despite setting USB CDC On Boot to “Enabled”.

5

Update:

I’ve encountered something else using the sketch below and I’m not sure why:

Guru Meditation Error: Core  0 panic'ed (Load access fault). Exception was unhandled.

Core  0 register dump:
MEPC    : 0x42008f38  RA      : 0x4200007c  SP      : 0x3fca21f0  GP      : 0x3fc95200  
TP      : 0x3fca2270  T0      : 0x4005890e  T1      : 0x3ffffe3e  T2      : 0x0000902d  
S0/FP   : 0x3fc9905c  S1      : 0x3fc99000  A0      : 0x00000000  A1      : 0x00000000  
A2      : 0x0000000a  A3      : 0x3fc97ac0  A4      : 0x00000000  A5      : 0x3fc97ac0  
A6      : 0xfa000000  A7      : 0x00000014  S2      : 0x4200184c  S3      : 0x00000000  
S4      : 0x00000000  S5      : 0x00000000  S6      : 0x00000000  S7      : 0x00000000  
S8      : 0x00000000  S9      : 0x00000000  S10     : 0x00000000  S11     : 0x00000000  
T3      : 0x3fc99000  T4      : 0x00000001  T5      : 0x3fc99000  T6      : 0x00000001  
MSTATUS : 0x00001881  MTVEC   : 0x40380001  MCAUSE  : 0x00000005  MTVAL   : 0x00000000  
MHARTID : 0x00000000  
3fca2510: 0x55555555 0x55555555 0x55555555 0x55555555 0x55555555 0x55555555 0x78555555 0x3fbaad56

3fca2530: 0x0000013c 0xabba1234 0x0000012f 0x0000003b 0x0000003b 0x00000103 0x00000001 0x3fcab5f0

3fca2550: 0x00000000 0x3fca2568 0x5fb65f00 0x00000000 0x6a7cebf5 0x4b93ceb9 0x000c0301 0x00100101

3fca2570: 0x080c0101 0xffffffff 0x3fffffff 0x08200101 0x000003ff 0x00000000 0x00200201 0x02200c01

3fca2590: 0x0b010100 0x20010720 0x00002000 0x200c0100 0x55010102 0x55555555 0x55555555 0x55555555

3fca25b0: 0x55555555 0x55555555 0x55555555 0x55555555 0x55555555 0x55555555 0x55555555 0x55555555

3fca25d0: 0x55555555 0x55555555 0x55555555 0x55555555 0x55555555 0x55555555 0x55555555 0x55555555

That is printing to my serial console despite not even having Serial.begin(9600) in my sketch.

#include <ArduinoBLE.h>
#include <Wire.h>
#include "SparkFun_Qwiic_Joystick_Arduino_Library.h" //Click here to get the library: http://librarymanager/All#SparkFun_joystick

JOYSTICK joystick; //Create instance of this object

int x, y;
int output[2];

void setup() {
  BLE.begin();

  BLE.scanForUuid("19B10000-E8F2-537E-4F6C-D104768A1214");

  pinMode(10, OUTPUT);

  while (!joystick.isConnected()) {
    digitalWrite(10, HIGH);
    delay(1000);
    digitalWrite(10, LOW);
    delay(1000);
  }
}

void loop() {
  BLEDevice peripheral = BLE.available();

  if (peripheral) {
    if (peripheral.localName() != "Alvik") {
      return;
    }
    
    BLE.stopScan();

    BLECharacteristic directionCharacteristic = peripheral.characteristic("19b10001-e8f2-537e-4f6c-d104768a1214");

    if (!directionCharacteristic || !directionCharacteristic.canWrite()) {
      peripheral.disconnect();
      return;
    }

    while (peripheral.connected()) {
      digitalWrite(10, HIGH);
      readJoyStick();

      output[0] = (x / 4) - 15;
      output[1] = (y / 4) - 15;

      directionCharacteristic.writeValue(output, 2);
    }

    digitalWrite(10, LOW);
  }
}

void readJoyStick() {
  x = joystick.getHorizontal();
  y = joystick.getVertical();
}
6

Which c3 are you using? Our Pro micro version has some special installation notes Software Setup - SparkFun Pro Micro ESP32-C3 Hookup Guide

7

Thank you. I followed the steps provided and I see “Sparkfun Pro Micro” and “SparkFun Pro Micro - ESP32C3”. With the first, I get an error when uploading:

avrdude done. Thank you.

Failed uploading: uploading error: exit status 1

With the second, it uploads but I’m still not seeing any printing in the serial monitor.

8

What OS are you using?

9

macOS Sonoma 14.5

10

I’m not entirely sure what is going on with yours…do you have access to a windows/linux machine that you can try instead?

11

I’m getting the same result on Windows 11.

12

Was it purchased from us? If so head over to Returns (contact vendor if purchased elsewhere) and we’ll get ya squared away

1 Like