Software serial Library

[ej3359]

Hello,

MySensors :API is compatible with the softwareserial Library?

I have some errors when i compile my sketch:
SoftwareSerial\SoftwareSerial.cpp.o: In function __vector_3': C:\temp\libraries\SoftwareSerial/SoftwareSerial.cpp:305: multiple definition of __vector_3'
MySensors\MyGateway.cpp.o:/utility/PinChangeInt.h:563: first defined here
SoftwareSerial\SoftwareSerial.cpp.o: In function __vector_4': C:\temp\libraries\SoftwareSerial/SoftwareSerial.cpp:312: multiple definition of __vector_4'
MySensors\MyGateway.cpp.o:/utility/PinChangeInt.h:573: first defined here
SoftwareSerial\SoftwareSerial.cpp.o: In function __vector_5': C:\temp\libraries\SoftwareSerial/SoftwareSerial.cpp:319: multiple definition of __vector_5'

regards
MySensors\MyGateway.cpp.o:/utility/PinChangeInt.h:583: first defined here

[adrianmihai83]

I get the same error when using the SoftwareSerial library. More specific, it is a known limitation that you cannot use SoftwareSerial.h and PinChangeInt.h together without altering one or another.

Let me give you an example, I was in the same case as you are now, I wanted to use an RF ID reader (125 kHz - RDM6300) on a software serial pin, in my case was A2 (don't ask why, this was the only input pin that I have on an UNO, it is stuffed with keyboard, display, motor actuator for door opening, button for manual door opening, ringer button and NRF24 - this is my all in one entrance sensor ). So, what you have to do:

pin A2 is on Port C

• you have to disable in the SoftwareSerial.h the other intrerupts, except the one associated to PortC, that would be - PCINT1 is for Port C :

PCINT0 is for Port B
PCINT2 is for Port D
PCINT3 - it is not the case of 328P so you can leave it uncommented

so in SoftwareSerial.h comment the following for PCINT0 and 2:

#if defined(PCINT0_vect)
ISR(PCINT0_vect)
{
ReceiveOnlySoftwareSerial::handle_interrupt();
}
#endif

The other thing that you have to do now is to tell PinChangeInt.h that you use Port C for other purpose. To do this, in MyGateway.cpp, ahead of the #include "utility/PinChangeInt.h" you should include the following:

#define NO_PORTC_PINCHANGES

Save, upload, enjoy... And don't forget to modify back what you altered.

This assumes that you don't use intrerupts on pins...