The SoftwareSerial library is widely used and well-documented. For more detailed information and advanced usage, refer to the official Arduino documentation .
void loop() if (mySerial.available()) char c = mySerial.read(); Serial.print(c); // Echo what we received to the serial monitor softwareserial h
// Send data via software serial (non-blocking friendly) if (Serial.available()) char out = Serial.read(); mySerial.write(out); // blocking but short | | No parity or multi-stop-bit support |
: Passing data between multiple Arduino boards. Known Limitations | This report covers:
| Limitation | Impact | |------------|--------| | Only one instance can receive at a time | Use listen() to switch, but simultaneous RX impossible. | | Cannot receive on both TX and RX pins simultaneously | Half-duplex only. | | Blocks during byte transmission | write() takes ~1 ms at 9600 baud, blocking other tasks. | | No parity or multi-stop-bit support | Limited to 8N1 format (8 data, no parity, 1 stop). | | Interference with delay() and micros() | Timing loops disable interrupts; micros() may drift. | | Unreliable above 38400 baud | Signal integrity and jitter cause bit errors. |
This report covers: