The board did not reply

“The board did not reply in time”

The scope asked the board who it is, and heard nothing back.

1. Check the sketch was uploaded to this board, and that you chose the same board in the Board list.
2. Close the Arduino IDE’s Serial Monitor, or any other program using the port. Only one program can use it at a time.
3. Unplug the board, plug it in again, and press Connect.
4. Try another USB cable. Some cables carry power only.
5. On an ESP32, if it still does not answer, try another USB port.

The trace stops, or “Blocks lost” climbs

• A cable or port that drops out briefly loses captures. Try another port, preferably one on the computer itself rather than a hub.
• A very busy computer can fall behind at the fastest rates. Lower the Sample rate.

The browser does not offer Connect

Connecting to a board needs Web Serial: Chrome or Edge, or Firefox 151 or later, on a computer. The demo board works everywhere.