More than 1packet per connection - Linux / Bluez (Intel Edison) as Central

[Wojtek]

I am using S110-based peripheral device which is sending 20byte notifications. Application on my peripheral works fine (testing with MCP gives transfer rate about 15kB/s which is not achievable with 1packet/connection even when connection interval is 7.5ms). Test with android smartphone also shows more than 1packet/conn.

As central device I am using BCM43340-based module on linux (with Bluez). I am not able to get more than 1packet/connection when connecting with that device. Does any of You have idea, what may be blocking BCM to receive more than 1 packet?

Best regards,

Wojtek

[Petter Myhre]

Is this you?

I dont' know what's blocking broadcom chip, but I just did a test with BlueZ and a Bluetooth dongle from CSR. It is able to do 6 packets per connection interval, at least when the connection interval is 20 ms. I was not able to change the connection interval (I tried to change conn_min_interval and conn_max_interval it in /sys/kernel/debug/bluetooth/hci1/)

[Wojtek]

Colleague of mine.

I did some tests on different connection intervals (including 7.5ms) and I can't get more than 1 packet/connection. So it seems it is not Bluez issue - probably some driver specific limitation.