Thought others might be interested that I’ve had a go with Outboard DFU on ESP32-S2.
(This also serves as notes for me to return to later)
I know this isn’t officially supported yet.
I’ve got it working on a Unexpected Maker FeatherS2 board on a Notecarrier-F.
The pins don’t match up exactly to what is expected, but can be sorted with jumper wires. See image below. Unfortunately I don’t believe this can work with Adafruit ESP32-S2 Feather boards because they don’t break out the UART0 RX Pin.
Also, as developer feedback:
I’ve noticed that the notecard puts the host into bootloader mode but then takes several minutes to actually update the firmware. Not a big deal or high priority, but I wonder if this delay could be avoided?
e.g. only put the host into bootloader mode when ready to flash the firmware.
Great! if you find these are boards you want to support, the number of jumper wires required could be reduced to 1, but it would require the “B0” signal to be available on some other pin e.g. AUX1 or AUX2. That way the DFU DIP switch could be left on. Just an idea.
Hey @zfields and all the Blues team,
Thanks heaps for the Outboard OTA functionality - very much appreciated. Also @calcut for making it work on the ESP32-S2 Feather and posting your bin file/memory offset syntax -awesome!
I can report it works on the ESP-wroom-32 modules too with slight modification. AUX3 is connected to the IO0 pin for putting the ESP into boot mode. Also, the OTA wouldn’t work with merging the 3 bin files as per calcut’s post. However when I tried the app binary by itself - bingo! So,
notecard -binpack esp32 0x10000:Blink.ino.bin
The rest as per the example. Also tried the same with an ESP8266 on the off-chance (memory location is the same) … but no go. Might it get support in the near future?