Can only program ESP32 once
Posted: Thu Mar 17, 2022 11:25 pm
Hi all,
I'm building a board very similar to common ESP32 development systems (such as the LilyGO VGA32), but which uses an ESP32-PICO-D4 core, not a shielded system. It also doesn't have the SENSOR capacitors. See diagram attached. 5V, D+ and D- come from the USB port, as usual.
I can program a blank ESP32 on this board without problems, at full USB speed.
But if I try to program it again, the host PC fails to connect to the ESP32 and ultimately gives up because it doesn't receive 'header package' or something.
This very same thing happened to me once with a LilyGO VGA32 system. But in my boards it happens every single time, after programing the ESP32 once.
Do you know what's going on?
Cheers, B.
I'm building a board very similar to common ESP32 development systems (such as the LilyGO VGA32), but which uses an ESP32-PICO-D4 core, not a shielded system. It also doesn't have the SENSOR capacitors. See diagram attached. 5V, D+ and D- come from the USB port, as usual.
I can program a blank ESP32 on this board without problems, at full USB speed.
But if I try to program it again, the host PC fails to connect to the ESP32 and ultimately gives up because it doesn't receive 'header package' or something.
This very same thing happened to me once with a LilyGO VGA32 system. But in my boards it happens every single time, after programing the ESP32 once.
Do you know what's going on?
Cheers, B.