ld.lld: undefined symbol: loop() Explained and Fixed
Why an Arduino sketch fails with ld.lld undefined symbol loop(), how it differs from compiler errors with line numbers, and how to fix both in Mokxi.
Posts tagged “arduino”
News from the workbench: what we shipped, how it works and guides for building with it. Follow by RSS or see every update.
Sweep a Servo and Control It with a Knob on Arduino Uno
Sweep a hobby servo back and forth, then turn it with a potentiometer on an Arduino Uno. Wiring, full sketches and jitter fixes, in your browser.
Serial Monitor Shows Nothing? Check Serial.begin and Baud
Debug an empty serial monitor on an Arduino Uno in Mokxi: the missing Serial.begin, an odd baud rate and the other usual causes, with fixes.
How to Open a Wokwi Project in Mokxi
Import a Wokwi diagram.json and sketch into Mokxi, see what carries over, and read the import report that names anything that does not.
Measure Distance with an HC-SR04 and Arduino Uno
Wire an HC-SR04 to an Arduino Uno in Mokxi, time the echo with pulseIn, print centimeters to the serial monitor and smooth jumpy readings.
Read a DHT22 Temperature and Humidity Sensor on Arduino Uno
Wire a DHT22 to an Arduino Uno in Mokxi, read temperature and humidity on the serial monitor, and learn why a reading comes back NaN.
Arduino Button and LED: Blink and Fade on an Uno in Your Browser
A beginner tutorial. Blink an LED, fade it with PWM, then add a button that switches between the two on an Arduino Uno, all in your browser.
A Free Arduino Simulator That Works on School Chromebooks
How teachers and parents can run Arduino code on a school Chromebook with nothing to install, what the free plan covers, and how Mokxi classes work.
Arduino Halloween Props: Build and Test a Jump-Scare Box in Your Browser
Build an Arduino Halloween jump-scare box in your browser first. The wiring, the real sketch walked through line by line, and what to tune before October 31.