UART2 BAUT RATE


#1

Hello,
I wanted to know if the maxim baute rate in Q2686 is 921kbps, in firmware 7.74, because I wanted to connect a GPS module, and I need 9600bps for NMEA frames.

Thank you,

Anna


#2

nothing…


#3

It is clearly stated in the PTS - what else do you need?


#4

Hello,
I want connect a UART2 from Q2686 which is 1.8V voltage, to a external GPS module. Is there anyone who did this before? Which module you recommend?


#5

So, if the GPS modules is not also 1.8V, you will need a Voltage Translator - these are available from the likes of TI, NXP, National, et al

Yes - the IESM for the Fastrack does exactly that!

You can also get an add-on for the Q26 devkit - speak to your Distributor

Why not just use the one Wavecom - sorry, Sierra Wireless - use for C-GPS… :question:


#6

Because, I think that this module is only a gps receptable, and you need to configure NMEA comand, but there are others that they directly send NMEA commands. In the other hand, i think that optus one, is quite old.

Thank you


#7

I think you mean “receiver” - in which case you are correct.

The point is: why waste money on a processor, memory, firmware, etc in the GPS unit when the Q26 is perfectly capable of doing all that by itself!
And the necessary software (Open-AT plugin) is free.

That’s the same rationale as using Open-AT in the first place - you obviate the need for an external processor by using the Q26’s own processing power.

But what does any of this have to do with the Baud rate of UART2??


#8

No sorry, I was wrong with the baud rate…


#9

#10

But the CGPS plugin gives you NMEA frames directly anyhow!

With a full-function GPS you are paying for additional hardware & functionality that you don’t need - and its additional power consumption - and you’re still going to have to write some software to receive the NMEA frames over the UART!