ESP32 Forum

Hi Craige,

Thank you for your reply. That looks very interesting!! Uhm I don't have common ground. Just connected TX to RX, and RX to TX of the 340C and connected that thing to USB-C.
Everytime I press the Reset button, the message is slightly different. Is that, because the ground is not common?

Thanks

yes. connect the GNDs on both boards. Probably there is a terrible ground path via the usb to a computer to the building ground, and somehow back to the board. It is a little surprise you get any characters coming through. the TX-out and RX-in signal is with respect to ground.

Thank you! Now there are normal characters showing.. finally. Okay so I could upload a program to my ESP32-S3, and now there is the next problem: I can't exit the bootloader:
It always says this message. I uploaded my program with IO0 and IO46 connected to ground, uploaded successfully and now after I reset the chip via the Chip enable connection, It does not want to start normal. I disconnected IO0 and IO46 from ground and they are floating. But it always goes into this boot mode. Does anybody know how I can fix this? I measured on both pins 1.46V, which should be "HIGH" right?

Thanks!