Hi Guys,

Is anybody really good with Digi x-tend modems.

I have to have the baud rate set at 38400 and the over air rate at 9600 (to get more range).
I can control the rate of strings sent at 38400 (1Hz – 5Hz) but I can’t change the baud rate.
Now the problem is that the strings that come in are in blocks of 256 bytes and they are coming in at 1 Hz? They are getting chopped up info is getting lost. Do you know of a way to set up the modem so that the strings just flow in line by line? Can this be done or does the Baud rate have to match the over air baud rate. If I up the over air baud rate to 115200 it does the same thing but a lot more info gets through the problem is greatly reduced. Only trouble is I can’t leave it at 115200 because the range is greatly reduced.

Thanks in advance.

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I've only ever played with the modems with the over the air baud rates matching the APM baud rate. Though saying that i've run into a few problems myself with low % telemetry (X-tend) whilst airborne. Everything ground tests fine but airborne we're getting quite a lot of drop-outs. Unfortunately I have quite a chain of devices for telemetry at the PC end. Usb--->serial converter---->serial to TTL converter---->digi x-tend so you can see I have a bit of work to do to find out what's causing the problem!

 

I thought you had to match over the air baud rate with autopilot baud or there would be lost data/lag but i am a bit of an amatuer TBH.

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