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Re: 8 concurrent Bluetooth LE devices (Adam Fish)

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Re: 8 concurrent Bluetooth LE devices (Adam Fish)

Subject: Re: 8 concurrent Bluetooth LE devices (Adam Fish)
From: Richard Grundy <email@hidden>
Date: Tue, 15 Mar 2016 21:04:59 -0500

Hi Adam,

We had a similar project requirement last year. During my research I found this rather thorough analysis from someone at the University of Zurich that proved very helpful. Our implementation followed what's covered in the deck. We have been able to sustain 7 active connections to BLE devices from one iPhone (5, 5s, 6, 6s, 6+). Our data rates are much lower than the rates tested in the slide deck so perhaps that's why we haven't run into any issues. Your case may be different.

https://www.dropbox.com/s/c6r9xsqisjnfsn5/BLE_Max_Connections_GysinMuellerRuest.pdf?dl=0

best,
Richard

----------------------------------------------------------------------

Message: 1
Date: Mon, 14 Mar 2016 23:59:36 -0700
From: Adam Fish <email@hidden>
To: email@hidden
Subject: 8 concurrent Bluetooth LE devices

Does anyone know the limit on the number of concurrent active connections
between an iPhone with iOS 9 and peripheral Bluetooth LE devices?

I have been able to connect 8 Metawear RPro sensors (
https://mbientlab.com/docs/MbientLab_Brochure.pdf) and stream accelerometer
data concurrently, but have run into issues on reconnecting these sensors
to another phone. I get a log message that says I need to update the
firmware on the device (but it is up to date).

Trying to figure out if this is an issue with the sensors, or if I am
hitting a limit on the number of concurrent connections that is manifesting
itself with this log message. I will be checking with MBientLabs too, but
wanted to see if anyone else knows the device limit?

Richard Grundy

Founder @ Flomio

--

PS: Hang with us at TrackHack.org and learn to build awesome end-to-end solutions with our products.

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