Uncomment this line and call the NeoSWSerial::rxISR from the appropriate enableInterrupt() callback function: #include For this possibility, NeoSWSerial has an option to disable using all the Pin Change Interrupt ISRs.
If you are using the second configuration, NeoSWSerial will conflict with EnableInterrupt. If you are using the first configuration above, AltSoftSerial will not conflict with EnableInterrupt.
#Software serial library functionxmit software#
To answer your original question about using the EnableInterrupt library at the same time as a software serial library: AltSoftSerial uses one of the TIMER resources, while NeoSWSerial simply uses the millis() timer. You should also be aware the NeoSWSerial disables interrupts while transmitting (not receiving). SoftwareSerial is a terrible choice, because it disables interrupts for long periods of time, it can only listen to one port at a time, and it cannot transmit and receive at the same time.ĪltSoftSerial and NeoSWSerial do not have these limitations, and they can co-exist to give you 2 extra serial ports. NeoSWSerial is limited to baud rates 9600, 1920, so that may be a consideration. Connect the other device to any two pins and use my NeoSWSerial.ĪltSoftSerial is more efficient at transmitting than NeoSWSerial, so use AltSoftSerial for the device to which you send the most data.Connect the RS232 or GSM device to pins 8 & 9 and use AltSoftSerial.If you really need to use 3 serial ports, you will have to use this configuration:
This has the added benefit that the Serial Monitor window will display the commands you do send to the RS232 device. Or, if the RS232 device receives formatted commands, it would ignore debug statments that don't look like commands. You will have to disconnect the RX pin to upload new sketches over USB. Don't even connect the TX pin to the RS232 device. If you do not send anything to the RS232 device, you can still use Serial for debug statements.
Sketch\sketch_ (symbol from plugin):(.text+0x0): first defined here (.text+0x0): multiple definition of `_vector_3' However when running the program that includes the two libraries, this long error message shows up : libraries\SoftwareSerial\ (symbol from plugin): In function `SoftwareSerial::read()': The project requires also the use of the EnableInterrupt library to enable interrupt in Arduino's analog pins, meaning that I DON'T USE EnableInterrupt for all of the Arduino's digital pins including D3, D4, D7 and D8. TX and RX for GSM module : Arduino Uno D7 and D8 pins.TX and RX for RS232 : Arduino Uno D3 and D4 pins.I'm using the SoftwareSerial library for RS232 communication, and GSM (SMS) transmission: I'm working on a project that involves both serial communication and GSM transmission.