Carl Denk wrote:
> This is with SCANXL with the Ford add-on.

Sorry, I don't know why I wrote "GM".


> With 36 selected PID's, I got
> 79 frames of data in 3 minutes = 2.27 seconds per refresh. This is using
> the USB cable. I'm still playing with the Bluetooth, I think the issue
> is with the computer and pairing. At this moment just happy with the
> USB. There was an update today that raises the speed from 38,400 to
> 115K, I don't know how that will effect the speed, but I'm happy with
> has been. It's a big step from my older scanner that just got a few PID's.

You won't see much difference over USB, but over Bluetooth the difference 
will be substantial (several hundred %). It's not the baud rate increase per 
se, it's the fact that most messages will come in quickly enough not be 
spread over multiple Bluetooth "bursts".

The instructions for switching old BT modules to the new baud rate, also 
include a command that tells the module to optimize for latency (since we're 
sending small messages back and forth, instead of large chunks of data):

https://www.scantool.net/support/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=41&nav=0,2

Latency optimization and the baud rate switch must be done simultaneously 
for best results.

Vitaliy 

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