Arduino Serial Monitor shows nothing? Six causes and quick fixes
The serial monitor is empty and you do not know why. Six causes, from a missing Serial.begin to the wrong board, with a test sketch you can run.
Posts tagged “troubleshooting”
News from the workbench: what we shipped, how it works and guides for building with it. Follow by RSS or see every update.
Arduino LED not lighting up? Seven checks that find the problem
An LED that stays dark is usually a wiring or one-line code mistake. Work through seven checks in order, each tested in the Mokxi simulator.
Arduino error: 'was not declared in this scope' (4 causes and fixes)
Four common reasons an Arduino sketch says "was not declared in this scope", what Mokxi's build card says for each one, and how to fix it fast.