topic Serial1 packet corruption on Arduino Uno Q at 115200? in Intel® Arc™ Discrete Graphics https://community.intel.com/t5/Intel-Arc-Discrete-Graphics/Serial1-packet-corruption-on-Arduino-Uno-Q-at-115200/m-p/1747684#M35755 <P><SPAN>Has anyone else experienced unreliable Serial1 behavior on the Arduino Uno Q at 115200 baud?</SPAN></P><P><SPAN>I tested the same packet transmit/receive sketches between:</SPAN></P><P><SPAN>Teensy 4.1 ↔ Teensy 4.1 → stable</SPAN></P><P><SPAN>Teensy 4.1 ↔ Giga R1 → stable</SPAN></P><P><SPAN>Teensy 4.1 ↔ Uno Q → inconsistent packet corruption on RX</SPAN><SPAN><BR /><BR /></SPAN></P><P><SPAN>The corruption appears as shifted/dropped bytes and repeated packet starts (0xFA) mid-stream.</SPAN></P><P><SPAN>I’m trying to determine whether this is:</SPAN></P><P><SPAN>a known UART/Serial1 issue on the Uno Q,</SPAN></P><P><SPAN>a buffering/timing limitation,</SPAN></P><P><SPAN>or something specific to high-speed packet handling.</SPAN><SPAN><BR /><BR /></SPAN></P><P><SPAN>Has anyone successfully used Serial1 reliably at 115200 with continuous packet streams on the Uno Q?</SPAN></P> Tue, 12 May 2026 18:00:12 GMT james0 2026-05-12T18:00:12Z Serial1 packet corruption on Arduino Uno Q at 115200? https://community.intel.com/t5/Intel-Arc-Discrete-Graphics/Serial1-packet-corruption-on-Arduino-Uno-Q-at-115200/m-p/1747684#M35755 <P><SPAN>Has anyone else experienced unreliable Serial1 behavior on the Arduino Uno Q at 115200 baud?</SPAN></P><P><SPAN>I tested the same packet transmit/receive sketches between:</SPAN></P><P><SPAN>Teensy 4.1 ↔ Teensy 4.1 → stable</SPAN></P><P><SPAN>Teensy 4.1 ↔ Giga R1 → stable</SPAN></P><P><SPAN>Teensy 4.1 ↔ Uno Q → inconsistent packet corruption on RX</SPAN><SPAN><BR /><BR /></SPAN></P><P><SPAN>The corruption appears as shifted/dropped bytes and repeated packet starts (0xFA) mid-stream.</SPAN></P><P><SPAN>I’m trying to determine whether this is:</SPAN></P><P><SPAN>a known UART/Serial1 issue on the Uno Q,</SPAN></P><P><SPAN>a buffering/timing limitation,</SPAN></P><P><SPAN>or something specific to high-speed packet handling.</SPAN><SPAN><BR /><BR /></SPAN></P><P><SPAN>Has anyone successfully used Serial1 reliably at 115200 with continuous packet streams on the Uno Q?</SPAN></P> Tue, 12 May 2026 18:00:12 GMT https://community.intel.com/t5/Intel-Arc-Discrete-Graphics/Serial1-packet-corruption-on-Arduino-Uno-Q-at-115200/m-p/1747684#M35755 james0 2026-05-12T18:00:12Z