No, don't use the SD card update method for CrumBLE. The CrossPoint SD card update is for CrossPoint itself — it expects a signed CrossPoint firmware image. CrumBLE is a completely different firmware that replaces CrossPoint, and the bootloader doesn't know how to verify or flash it from the SD card menu.

You need the Flash Tool (or esptool/web flasher) to write CrumBLE directly to the ESP32's flash. The SD card method will either fail silently or, worse, leave you in a weird state where neither firmware boots cleanly.

If you've already put the CrumBLE .bin on the SD card, just remove it and flash properly via USB. Takes 30 seconds.

Hi @yasminriu-netizen,

Thanks for being a part of the GitHub Community!

If you're looking for help, you might want to try asking for help somewhere that focuses on this specific topic. It's possible that another GitHub user might have run into this same issue and can help, but the GitHub Community Discussions focuses primarily on topics related to GitHub itself or collaboration on project development and ideas. We want to make sure you’re getting the best support you can, but this space may not be the right place for this particular topic.

Best of luck!