No serial output via USB on ESP32 FireBeetle. Not hardware issue.

[electron1979]

Hardware:

Board: DFRobot ESP-WROOM-32
Core Installation/update date: BN: Unknown board, VID: 2341, PID: 00F3
Chip: SP32D0WDQ6 (revision 0)
IDE name: Arduino IDE 1.8.4, Win10 Home, IDF component: N/A
Flash Frequency: 80, 40Mhz
Upload Speed: 9600, 115200, 921600

Description:

No serial-over-USB displayed on 'Serial Monitor' when using the Espressif 'Boards' :(

What could I be doing wrong?

I tried the DFRobot Board, from https://www.dfrobot.com/wiki/index.php/FireBeetle_ESP32..., and it works!

The Espressif Board setting compiles code all the code I have tried. Wasn't even using #include <Arduino.h> most of the time :) THANKS HEAPS:)
The DFRobot Board has difficulties compiling the very few, although different, bits of code I have tried ;(

Sketch:

#include <Arduino.h>

void setup() 
{
  delay(1000);
  Serial.begin(115200);
}
 
void loop() 
{
  Serial.println("Hello from FireBeetle ESP32 board");
  delay(2000);
}

Debug Messages:

No errors or warnings, with Max Power at the debug level controls (I be givin' it all I got cap'n).

DFRobot Board Serial Monitor output, after flash:

ets Jun 8 2016 00:22:57
rst:0x10 (RTCWDT_RTC_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0x00
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0008,len:8
load:0x3fff0010,len:1760
load:0x40078000,len:6668
load:0x40080000,len:252
entry 0x40080034
Hello from FireBeetle ESP32 board
Hello from FireBeetle ESP32 board
Hello from FireBeetle ESP32 board
...

DFRobot Board Serial Monitor output, after reset:

rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
ets Jun 8 2016 00:22:57

rst:0x10 (RTCWDT_RTC_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0x00
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0008,len:8
load:0x3fff0010,len:1760
load:0x40078000,len:6668
load:0x40080000,len:252
entry 0x40080034
Hello from FireBeetle ESP32 board
Hello from FireBeetle ESP32 board
Hello from FireBeetle ESP32 board
...

Espressif Board Serial Monitor output, after reset:

ets Jun 8 2016 00:22:57

rst:0x1 (POWERON_RESET),boot:0x3 (DOWNLOAD_BOOT(UART0/UART1/SDIO_REI_REO_V2))
waiting for download

[electron1979]

Must be this 'boot:0x3' business.
Hmm, what can I do?

[electron1979]

I have serial out via TX pin. Woohoo!

But, it means I have to use a separate instance of another Port.
It won't upload (connect) via TX & RX pins (USB cable connected or removed and running on battery).
And, needs to be power cycled, even though it's still running on the battery (Switchable USB hubs are good for this).
Won't upload via UBS unless TX pin is disconnected.

[copercini]

Is your pin 0 connected to something?

[DzikuVx]

I confirm the same issue with 23cf233
pin 0 not connected to anything

After rolling back to 706bf48 , everything works fine again.
Hardware: DOit ESP32 dev kit V1

Looks like bug was introduced somewhere between those 2 commits

[me-no-dev]

pin 0? what is the issue now? no serial output?

[DzikuVx]

The same issue
No serial-over-USB displayed on 'Serial Monitor' when using the Espressif 'Boards' :(

[me-no-dev]

nothing at all or does it stop before the sketch starts? any bootloader output?

[DzikuVx]

@me-no-dev bootloader output present,
no content available over serial from sketch like this, for example

#include <Arduino.h>

void setup() 
{
  delay(1000);
  Serial.begin(115200);
}
 
void loop() 
{
  Serial.println("Hello from FireBeetle ESP32 board");
  delay(2000);
}

[me-no-dev]

I had this happen to me once last night, but then it started working an no fail... will investigate further if I can reproduce it again. Asked around IDF team if they have a clue also.

[DzikuVx]

Like I wrote, rolling back to 706bf48 made that work again

[me-no-dev]

quite an old commit though ;) it's something between last night and a couple of weeks ago

[DzikuVx]

I needed EEPROM so just checked out to the oldest commit I was able to use

[me-no-dev]

can you please pull the last change and give it a go?

[DzikuVx]

@me-no-dev Looks like it helped. Serial working again in

For the record, bootloader output

rst:0x10 (RTCWDT_RTC_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0018,len:4
load:0x3fff001c,len:956
load:0x40078000,len:0
load:0x40078000,len:13076
entry 0x40078ad0

I'm not sure it solved problem of @barsznica but mine was solved. Thanks