Hi all, I’ve been banging away at this for a week and I just can’t get anything to flash a basic initial code to the ESP board to get started. I have a USB - UART “ESP PROG V1.0” connected to my 4 way relay board which has the ESP32-32E. Wiring connected as
UART - ESP
TxD - Rx
RxD - Tx
GND - GND
3V3 - 3V3
USB board is connected directly into computer (no cables). ESP board powers up OK from the 3V3 source. LED indicators show a “Knight Rider” sequence as the pre-programmed code. USB Serial always shows up as the correct COM port to program on the computer. What I’ve tried -
With and without connected across I00 and EN pins from the USB - UART
Without I00 and EN connected, press EN then hold I00. The ESP appears to enter download mode (no knight rider) - single led lights but no download success.
Insert USB while holding I00, release I00 pre and post trying to download, still no luck.
Reversing Tx and Rx wiring.
External 5V power supply.
Tried ESPHome Builder, ESPLaunchpad, web.esphome, esptool in cmd.
Tried a few different versions of CH34x driver.
Tried 2 different computers
esptool output looks like this -
trying to connect
flush start
setting serial port timeouts to 1 ms
flushed 0 bytes
setting serial port timeouts to 1000 ms
flush complete
espcomm_send_command: sending command header
espcomm_send_command: sending command payload
read 0, requested 1
espcomm_send_command: didn’t receive command response
I’m ready to junk either or both of the USB UART and the ESP32 board but thought I’d post here for anyone’s thoughts first. Thanks in advance.
