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Topic: Original Arduino GSM Library - change RX / TX to Hardware Serial (Read 5819 times) previous topic - next topic


Hej guys,

is anybody of you familiar with the original Arduino library gsm.h and can help me?

I need to change the rx tx pins from software serial to hardware serial (channel 2 on the Arduino Mega).

Is it possible?
I already tried the Rxpin / Txpin from GSM3Softserial.cpp to 16/17 (pins of Serial2 on the Mega) but it did not work.



GSM3SoftSerial was designed for emulate a serial port by software, not for hardware native serial port. You have to modify it or create a new code for it.
If you can use a serial port emulate by software, RX pin must be a pin with support for interruptions.



is it possible for me to use Original Arduino GSM Library with other GSM shield (not original GSM shield as well) for example from DFRobot? if it could, in which part i must adjust?


You can modify it. The most important things are software serial communication, commands compatibility, software flow control and responses times.


Could you solve the problem? I have got the same problem. I want to use hardwareserial.


In theory, you can replace all references to SoftwareSerial with Serial class.


the most important is that how to change pin software defined rx and tx (ardunio uno pins 2&3) gsm.h library to hardware 0&1 pins i mean what should we modify in that library to do so?


Dear all,
has anyone solved this issue on how to replace the software serial with the hardware one?

Because I've already designed a board that use the M10 GSM modem in order to communicate data on a IoT platform.

The problem is that the module is connected to the hardware serial pin instead of 2,3 as usual.

That was in order to save program space using HW pins since that I should not keep the hardware serial free.


Hey Peeps.

I'm in the same boat. I need to change the RX / TX to HW. not the usual 2,3. But the 0,1
I been searching the internet and found this issue/discussion:
[ url = http://arduino.stackexchange.com/questions/1230/can-the-official-arduino-gsm-shield-library-be-changed-to-work-with-hardware-ser ]

I did try it out and find the Pin upsetting for GSM in the header file ( GSM3IO.h ) the place -> ( C:\Program Files (x86)\Arduino\libraries\GSM\src). But when I change the pin ports there nothing really happens.

Are there someone that has a suggestion about this?



I was looking at this post and noticed some of you having trouble using hardware serial. I have figured it out with the library I am using. I use it with a Mega and a 3G modem shield. If anyone would like more info on what I did, please reply.

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