Softwareserial.h Library 〈4K × 1080p〉

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

// Find this line: #define _SS_MAX_RX_BUFF 64 // Change to 128 or 256 (uses more RAM) Don't. Both rely on precise timing and disabling interrupts. They are incompatible. Use hardware serial or an I2C/SPI serial bridge (e.g., SC16IS750). 10. Alternatives to SoftwareSerial | Alternative | Pros | Cons | |-------------|------|------| | HardwareSerial (Serial1, Serial2 on Mega) | Reliable, full-duplex, high speed | Limited ports | | AltSoftSerial (Paul Stoffregen) | Better timing, supports 57600 baud | Fixed pins (8=RX, 9=TX on Uno) | | NeoSWSerial | Interrupt-driven, allows multiple RX | Still software-based | | I2C/SPI UART modules (e.g., MAX3100) | Frees CPU, many ports | Extra hardware cost | | Use a second Arduino as serial bridge | Very flexible | Complex, power hungry | 11. Full Example: GPS + Bluetooth on Uno #include <SoftwareSerial.h> SoftwareSerial gps(10, 11); // GPS module SoftwareSerial bluetooth(8, 9); // HC-05 Bluetooth softwareserial.h library

Bidirectional Communication with Collision Avoidance Since SoftwareSerial is half-duplex, implement a simple protocol: void setup() Serial