All sorted guys. It was a hardware issue. Thanks to all!

Try MTDI pull HIGH. When MTDI is wrongly pulled then you can enter download mode: "waiting for download" but you wont be able to upload code, it will end up with something like that: Uploading stub... Running stub... Stub running... Changing baud rate to 921600 Changed. Configuring flash size... Wa...

WiFive wrote: ↑

Sat Mar 14, 2020 8:54 am

If you get "waiting for download" you're doing the strapping correctly. Could be a problem with the tx of your usb adapter.

I did a quick check of the Tx of the USB adaptor, using a serial monitor and shorting the Tx and Rx. I'm echoing back all transmits so I think the Tx is functional?

Hi guys, I'm working with an inherited custom board which is using an esp32-d0wdq6. When programming I get an error stating "Failed to connect to ESP32: Timed out waiting for packet header" and "ESP32 Chip sync error esp_sync_blocking" . I have tried various programming tools to flash the chip such ...