Cheap device that can sniff BLE and send it to Wireshark: https://www.adafruit.com/product/2267 https://www.adafruit.com/product/2267 ($20) Overview on using

Cheap device that can sniff BLE and send it to Wireshark: https://www.adafruit.com/product/2267 https://www.adafruit.com/product/2267 ($20) Overview on using it as a sniffer: https://learn.adafruit.com/introducing-adafruit-ble-bluetooth-low-energy-friend/ble-sniffer https://learn.adafruit.com/introducing-adafruit-ble-bluetoot... Still a lot of work though, if it's anything like LED signs I've reverse engineered. Trying to figure out if it's length encoded payloads or delimited payloads, what obscure checksums it might use, weird encoding of images, etc. And experimenting often hangs the device, or changes it's behavior significantly.