Is it possible to use the Communications API with an embedded device running Linux?

I am working on an embedded device that I'd like to control an app on a Garmin watch. The Communications API looks like exactly what I need, i.e., pass messages longer than 20 bytes back and forth from the watch that contain simple prompts and responses. The device isn't a phone, so I can't relay messages via Garmin Connect like the android API does, but is it possible to just use the same Bluetooth profile?

0 jim_m_58 over 4 years ago

You can do your own BLE interface. Here's where I do it to talk to a Raspberry Pi:

forums.garmin.com/.../would-you-like-some-raspberry-pi-with-your-connect-iq

0 Rubymage over 4 years ago in reply to jim_m_58

I've read through your project extensively (thanks for posting source code!). I had looked at the BLE API, but the docs for `Characteristic.requestWrite` says it doesn't support "long writes" over 20b, which most of our messages are. Unless I'm missing something, your BLE stuff is just writing very small commands to the Pi, right? I already have a phone app that sends the messages through the Communications API, but I was hoping to be able to use the same profile from a non-phone device.

0 jim_m_58 over 4 years ago in reply to Rubymage

To use the Comm API. the other ends needs to be a phone.

As far as the 20b, you could send multiple messages or something.

0 lllllluuuu over 4 years ago

I tested with a NRF52840 board and I had more data than 20 bytes, so, I split the data in two BLE characteristics - it worked on Edge 830 and on the simulator.