Accessing Serial port via wifi telnet sesssion

Slider1960 · 08-10-2016, 02:10 AM

Hi Guys

I have been playing around with Kobos for quite a while and currently have one running xcsoar (a gliding program) which connects to a GPS / Barometer via a bluetooth module I installed on the internal serial port. I achieved this by setting up the BT module via a TTL / USB cable on my laptop then soldered it into the Kobo.

Whilst this has been working fine a firmware change in the GPS device means I need to at least re-pair the module and I am trying to find ways to reprogram it while still in the reader. I have telnet via the wifi interface to the system and need to access the serial port to send the AT commandes.

I think it should be possible to

Code:

echo 'at-command' /dev/ttymcx0

but there is no way to see if this is working or even if the lf/cr sequence is completing the command.

Is there a way to run a command line serial port program to do this from within the telnet session?

TIA

frostschutz · 08-10-2016, 05:40 AM

Grab either of these:

https://www.busybox.net/downloads/bi...busybox-armv5l
https://www.busybox.net/downloads/bi...busybox-armv7l

Put it in one of the bin dirs, chmod +x, then

busybox-armv7l microcom <someoption?> /dev/ttymcx0

Can't test it myself since I don't have anything hooked to the serial lines.

Slider1960 · 08-10-2016, 04:52 PM

Thanks. Just what I needed. The version of busybox I already had didn't have the microcom commandlet. All i had to do was create a txt file with the AT commands in it and invoke it thus:

Code:

/bin/busybox-armv71 microcom -t 3000 -s 9600 -X /dev/ttymxc0 <AT-cmd.txt

Now just need to put that into a script I can call from within the application......

Lucas Malor · 08-19-2016, 04:05 PM

Where do you soldered the module?

08-10-2016, 02:10 AM	#1
Slider1960 Connoisseur Posts: 59 Karma: 596608 Join Date: Oct 2008 Device: Cybook Gen3, Kindle PaperWhite, iPad	Accessing Serial port via wifi telnet sesssion Hi Guys I have been playing around with Kobos for quite a while and currently have one running xcsoar (a gliding program) which connects to a GPS / Barometer via a bluetooth module I installed on the internal serial port. I achieved this by setting up the BT module via a TTL / USB cable on my laptop then soldered it into the Kobo. Whilst this has been working fine a firmware change in the GPS device means I need to at least re-pair the module and I am trying to find ways to reprogram it while still in the reader. I have telnet via the wifi interface to the system and need to access the serial port to send the AT commandes. I think it should be possible to Code: echo 'at-command' /dev/ttymcx0 but there is no way to see if this is working or even if the lf/cr sequence is completing the command. Is there a way to run a command line serial port program to do this from within the telnet session? TIA

08-10-2016, 04:52 PM	#3
Slider1960 Connoisseur Posts: 59 Karma: 596608 Join Date: Oct 2008 Device: Cybook Gen3, Kindle PaperWhite, iPad	Thanks. Just what I needed. The version of busybox I already had didn't have the microcom commandlet. All i had to do was create a txt file with the AT commands in it and invoke it thus: Code: /bin/busybox-armv71 microcom -t 3000 -s 9600 -X /dev/ttymxc0 <AT-cmd.txt Now just need to put that into a script I can call from within the application......

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08-10-2016, 05:40 AM	#2
frostschutz Linux User Posts: 2,279 Karma: 6123806 Join Date: Sep 2010 Location: Heidelberg, Germany Device: none	Grab either of these: https://www.busybox.net/downloads/bi...busybox-armv5l https://www.busybox.net/downloads/bi...busybox-armv7l Put it in one of the bin dirs, chmod +x, then busybox-armv7l microcom <someoption?> /dev/ttymcx0 Can't test it myself since I don't have anything hooked to the serial lines.

08-19-2016, 04:05 PM	#4
Lucas Malor Pain in the arse Posts: 758 Karma: 77856 Join Date: Apr 2013 Device: Kobo Aura One, Kindle 4	Where do you soldered the module?