ESP32-EVB flashing baud rate

Started by joverman, December 15, 2017, 11:27:18 AM

Previous topic - Next topic


I am using an ESP32-EVB (Rev C) under Linux and I am using the normal esp-idf for development.

Everything works fine using the default baud rate of 115200 for flashing which is also mentioned on the ESP32-EVB github page.

However, I am unable to get any higher baud rate to work, which is a pity since flashing large images takes ages then. On the same USB port I was able to flash a DevKitC from Espressif with 921600.

Is there any configuration in which the ESP32-EVB supports a higher baud rate than 115200?

Any comments or info welcome.


PS: This is what I get for 921600:

$ make flash
Flashing binaries to serial port /dev/ttyUSB1 (app at offset 0x10000)... v2.1
Chip is ESP32D0WDQ6 (revision 1)
Uploading stub...
Running stub...
Stub running...
Changing baud rate to 921600
Configuring flash size...

A fatal error occurred: Timed out waiting for packet header
make: *** [flash] Error 2


The two boards use different serial-USB converter chips. ESP32-EVB uses CH340, and DevKitC uses FTDI. Most likely the (that handles the uploads) works better with the FTDI chip and than CH340 chip. I've seen similar reports in GitHub:


Technical support and documentation manager at Olimex