Softwareserial.h Library

#include <SoftwareSerial.h>

: Sending and receiving SMS or data over cellular networks.

void setup() port1.begin(9600); port2.begin(9600); port1.listen(); // port1 is active softwareserial.h library

// Periodically check Bluetooth (non-blocking) if (bluetooth.available()) char cmd = bluetooth.read(); if (cmd == 'G') gps.listen(); // Switch back to GPS

: Communicating with specialized sensors like the MQ-135 gas sensor that use serial protocols. Limitations and Trade-offs #include &lt;SoftwareSerial

void setup() // Initialize the serial communication at 9600 bps mySerial.begin(9600); Serial.begin(9600);

: Reading NMEA data strings from GPS modules. if (cmd == 'G') gps.listen()

void loop() if (port1.available()) // Process port1 data

// Create a SoftwareSerial instance SoftwareSerial mySerial(rxPin, txPin);

port1.listen(); // Switch back