B4R Question WROOM 02 Problems When Uploading


Licensed User

I have a WROOM 02 connected to a USB To UART chip. After grounding IO0, it works fine when flashing the Espressif AT commands(using their flashing tools) so I do know it can be flashed and my connections are correct. The AT commands then work perfectly.

When I ground IO0 and try to upload using B4R and the Generic ESP8266 selection, I get upload errors. I even tried the ESP12E selection. The baud rate to the wroom2 is fixed at 115200 by the converter chip.

Any help would be greatly appreciated.

Thanks, Rob


Licensed User
Hi Erel:

I have not tried that. I am able to upload, using B4R, to the Wemos D1 Mini. I used the HTTP client sample on the D1 Mini and it works perfectly. Typically when flashing the WROOM I have to pull IO0 low for it to work. With the D1 Mini it somehow does that automatically.

I hope this info is helpful.



I just tried uploading a sketch from Arduino IDE and I receive the same type of upload errors.
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