Is it possible to enter serial bootloader from application?
Posted: Fri Jul 09, 2021 7:44 am
I have been using some ESP32 development boards which don't have sufficient capacitance on EN to allow reliable operation of esptool.
Several of these are now in use and some of them refuse to enter serial bootloader mode so I can't re-flash them.
I have Micropython installed on them and I am wondering if there might be a way to write a Micropython script to put the chip into serial bootloader mode so that esptool (perhaps modified to remove the RTS DTR line waggling code) can be used to flash them?
Any ideas?
Several of these are now in use and some of them refuse to enter serial bootloader mode so I can't re-flash them.
I have Micropython installed on them and I am wondering if there might be a way to write a Micropython script to put the chip into serial bootloader mode so that esptool (perhaps modified to remove the RTS DTR line waggling code) can be used to flash them?
Any ideas?