Re: data transmission rate...to slow...
Re: data transmission rate...to slow...
- Subject: Re: data transmission rate...to slow...
- From: Etan Kissling <email@hidden>
- Date: Thu, 11 Apr 2013 13:00:45 +0000
- Thread-topic: data transmission rate...to slow...
Frederic,
there is only one packet of up to ~20 bytes transmitted every two connection events if you use reliable data transfer.
If you want to increase that to ~ four packets every connection event, you have to use unreliable data transfer (WriteWithoutResponse / Notification)
and have to add reliability in your app layer.
Note that WiFi interferes with BLE, disabling it should net you a small boost in throughput.
These are the throughputs I could achieve with iPhone as central and dedicated peripheral: http://www.scriptreactor.com/conn_interval-throughput.pdf
Etan
On 11.04.2013, at 14:54, Frederic Visticot <email@hidden>
wrote:
> I have made some tests to exchange data between 2 iDevices (iOS6 iPad3/iPhone5) using CBPeripheralManagerConnectionLatencyLow settings.
>
> The maximum rate I have is 1135 bytes / s (1.1KB/s)
>
> - Is it possible to get better speed ?
> - What is the maximum I can have with iOS stack ?
>
> From some documents:
> BLE: 200kbits/s -> 25KB/s
> NFC: 424kbits/s
>
> Why is the difference so huge (20x slower) ?
>
> Fred
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