Has anyone else experienced unreliable Serial1 behavior on the Arduino Uno Q at 115200 baud?
I tested the same packet transmit/receive sketches between:
Teensy 4.1 ↔ Teensy 4.1 → stable
Teensy 4.1 ↔ Giga R1 → stable
Teensy 4.1 ↔ Uno Q → inconsistent packet corruption on RX
The corruption appears as shifted/dropped bytes and repeated packet starts (0xFA) mid-stream.
I’m trying to determine whether this is:
a known UART/Serial1 issue on the Uno Q,
a buffering/timing limitation,
or something specific to high-speed packet handling.
Has anyone successfully used Serial1 reliably at 115200 with continuous packet streams on the Uno Q?
