void loop() // Listen to GPS first gps.listen(); if (gps.available()) Serial.write(gps.read());
| Library | Best For | |---------|----------| | | Better interrupt handling, supports simultaneous RX/TX on AVR boards. | | AltSoftSerial | Hardware-timed, very reliable but uses fixed pins (8 & 9 on Uno). | | Serial ports on Mega | If you have an Arduino Mega, use its 4 hardware serial ports instead. | softwareserial.h arduino library download
...then . You simply include it at the top of your sketch: void loop() // Listen to GPS first gps
| Library/Approach | Best for | |----------------|-----------| | HardwareSerial | Primary serial, high baud rates. | | NeoSWSerial | Reliable reception on two pins at up to 57600 baud. | | AltSoftSerial | High-performance, but uses fixed timer pins (8 & 9 on Uno). | | SerialPort (Mega) | Multiple hardware ports (Serial1, Serial2, Serial3). | | I2C/SPI to UART bridge (e.g., SC16IS750) | Add many hardware UARTs externally. | | | AltSoftSerial | High-performance, but uses fixed
Here is how you define and use SoftwareSerial.h :
void loop() if (gps.available()) char c = gps.read(); ble.write(c); // forward GPS data to Bluetooth Serial.write(c); // optional debug
void loop() // Forward data from hardware serial to software serial if (Serial.available()) char c = Serial.read(); mySerial.print(c);