lib_deps = arduino-libraries/SoftwareSerial@^1.0.4
If you use PlatformIO, add the following line to your platformio.ini file:
Don’t look for a download link for SoftwareSerial.h — it’s already there. Just #include <SoftwareSerial.h> and start using it. If you need better performance, explore alternatives.
#include <SoftwareSerial.h>
If you downloaded the SoftwareSerial-master.zip file from GitHub, here is how to install it manually.
void setup() // Step 3: Start the hardware serial for debugging Serial.begin(9600);