Hi,
I’m currently trying out SPI Flashing for ESP32-S3 board and was wondering if I could do the same on ESP32-S3 Sense boards? (I have a couple of xiao boards (ESP32S3) and was thinking if I could flash them through one board via SPI without having to use USB or OTA.
Hi there, and Welcome here
so from the IDF info I see this?
“Different from the API before ESP-IDF v4.0, the functionality of esp_flash_* APIs is not limited to the “main” SPI flash chip (the same SPI flash chip from which program runs). With different chip pointers, you can access external flash chips connected to not only SPI0/1 but also other SPI buses like SPI2.”
from this link, I wouldn’t think with Xiao that it’s possible , but you may try and see if it works
SPI Flash API - ESP32-S3 - — ESP-IDF Programming Guide v5.2.2 documentation.
HTH
GL 
PJ
Hi PJ,
thanks for the tips.
Yeah I am following that for reference at the moment, just wanted to see if anybody else have tried to do it.
On the side note, do you know any reference or examples I can follow and study for SPI communication between two Xiao ESP32S3 Sense (one acting as master, the other as slave?)
Maybe I’m not using the right keywords to find this. Hope you can assist
Thanks
Hi there,
sure I do, the one cqwaltney is a great starting point, more of the same would be these guys
also from just a stright Arduino ide,
this one:
for an indepth discusion from the horses fence.
HTH
GL PJ
that reminds me … didnt you add the flash memory to the XIAO grove expansion board
indeed I did.
before it was cleaned…
video of tests…
HTH
GL PJ
FWIW , I added the extra flash to all my boards. (5)
in a nutshell what does it do for you?
More flash memory , no need for SLOW-A$$ SD card for data points.
It is GREAT for the lacking ESP32C3 low onboard flash size.
but is nice enhancement for IMU data for Sense chip. , which pours in so setting buffers for external flash buys more points more room for config data as well.
Memory is a commodity on these MCU’s more is Better.
HTH
GL PJ
and I thinks it was .29 cents a chip? 
Used HOT-AIR to place it, like those on Discord full of it… LOL 
Thanks! Those were helpful.
