Problem flashing -- Sketch uploads fine, but won't run due to "(POWERON_RESET)"

[Munque]

Suddenly unable to run any sketches after flashing.

Tech details:
MacOS 10.15.4 running Arduino 1.8.12 using a USB/TTL cable to connect.
I've tested this using multiple USB/TTL cables, multiple ESP32 boards, and multiple sketches. Always the same result after the flash completes.

Sketches upload without any problem, but instead of running I get the following output in the Arduino Serial Monitor:

Code: Select all

rst:0x1 (POWERON_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:1216
ho 0 tail 12 room 4
load:0x40078000,len:9720
ho 0 tail 12 room 4
load:0x40080400,len:6352
entry 0x400806b8

I've seen a number of forum postings showing a similar issues, but so far none of the suggested solutions helped.

[Munque]

Answering my own question here:

The problem had to do with the baud rate:
A line in the Arduino code

Code: Select all

Serial.begin(9600);

didn't match the baud rate of the Arduino IDE Serial Monitor (set to 115200).

Making sure the two matched, either at 9600 or 115200 baud solved the problem.