Softwareserial.h Library Instant

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

void setup() Serial.begin(9600); // Hardware serial for debug gps.begin(9600); // GPS module baud rate softwareserial.h library

void setup() Serial.begin(9600); // Debug console gps.begin(9600); bluetooth.begin(38400); // Common HC-05 default gps.listen(); // Listen to GPS first // Periodically check Bluetooth (non-blocking) if (bluetooth

// Must call listen() on active port regularly if (!gps.isListening()) gps.listen(); if (cmd == 'G') gps.listen()

SoftwareSerial.h is a powerful but fragile tool. It turns any two pins into a serial port, enabling multi-device Arduino projects on a budget. However, its software-timed nature means it cannot replace hardware serial for high-speed, high-reliability, or interrupt-heavy applications.

// Switch to port2 briefly port2.listen(); if (port2.available()) // Process port2 data