While I empathize with your feelings about lock-in, I encourage you to see that we live in an amazingly empowering era. I would wager that with $20 in credits for the LLM flavor of the week and and an equally expensive BLE-to-USB dongle (try the nRF52840 dongle), you will have the protocol reverse-engineered overnight. BLE protocols are often very low-hanging fruit for this type of effort.
Yes, it's annoying this stuff isn't open source from the get-go, but it has never been easier to open hardware up for yourself and others.
Yes, it's annoying this stuff isn't open source from the get-go, but it has never been easier to open hardware up for yourself and others.