BLE Discoverablity after paired?

Former Member over 5 years ago

Hi,

I would like to use my paired FR245M as a simple BLE beacon device. I have multiple ESP32's around the house that listen for BL/BLE devices, but after I pair my watch with my phone it no longer does emit it's presence (?)

Is there a way to fix it?

For examples I had a Xiaomi MiBand4 that was paired to my phone and it was still visible (the app had an option to make it discoverable).

Thanks!

0 jim_m_58 over 5 years ago

BT is typically a one-to-one thing, where once it's connected it no longer advertises. Some deices allow more than one connection though.

0 Former Member over 5 years ago in reply to jim_m_58

I know, but I was wondering if there is an option to changes this. Im watching the BL video from Garmin CIQ, but it's little over my head https://www.youtube.com/watch?time_continue=3&v=drZ_pzGwo7I&feature=emb_title

0 jim_m_58 over 5 years ago in reply to Former Member

The CIQ BLE scans for other devices. It itself doesn't advertise You could write something that looks for the ESP32's but that's it. I do just that with raspberry Pi devices.

0 bawki over 2 years ago in reply to jim_m_58

I know this is an old threat, but I was wondering what your approach was. Do you run a background app on the watch that scans for devices every x minutes, and then does a web request to send the rssi of the closest pi?

I have a ESP32 with ESPresence set up and it sees a lot of apple watches in my vicinity, I assume they are all paired to their respective owner's phone but still advertise BLE.

Is it even possible to send data to for example a MQTT server to update the room the watch is in? This seems like a lot of extra work for something that is a simple toggle setting in the watch firmware. Would registering a SDP profile and setting the BLE to scanning mode work? I assume the BLE scanning implementation only does a passive scan? Maybe sending a pair request to the closest EPS32 every few minutes might be a hack?

0 jim_m_58 over 2 years ago in reply to bawki

CIQ Ble does not advertise. It scans looking for devices that do advertise. Try this app - BLESCAN to see what a garmin watch can see.

https://apps.garmin.com/en-US/apps/9bcc8b66-8385-4afb-b93e-f69e01422284

You'll see the watch can see advertisements from a number of devices. The Nordic Thingy52 samples in the SDK show how this all works and here's a blog I did abot interfacing to a raspberry pi...

https://forums.garmin.com/developer/connect-iq/b/news-announcements/posts/would-you-like-some-raspberry-pi-with-your-connect-iq