You declare variables in the scope of setup (), and you try to use them in the scope of loop (), so the compiler tells you that you haven't declared them to be used in the scope of loop () . . . . What's the confusion? Put your variable declarations before setup () by where all of your #define 's are and they'll be global.
I have the same error, when I was testing it I found that it was the bluetooth module, for some reason if it is to the current to program my Arduino gave me that error, my solution was to program the Arduino UNO without a connected module and it worked.
What guidelines should I be aware of when I work with an Arduino board if I don't want to harm neither myself nor the board. The three kind of activity that requires touching the Arduino and what I'm asking about: Setting up wire, component layout or breadboard. Debugging a running setup. Moving, mounting up the board somewhere.
Many times people ask questions about how to fix their LCDs that don't display or displays wrong/random stuff. The following information, when supplied with your thread, will get your problem solved the quickest way. Fixing these problems ends up being mostly a frustrating experience unless the following are provided upfront without any "BUT"s. I believe several other helpers here would agree ...
Hi everybody, I am not too much familiar with HW stuff and a little more than newbi on SW. I would like to use this ESP32C3 supermini board. For the pinout I found some different versions on the web and I wonder which one is the real one? My second question is: I want to use just 3 simple digital output signals to drive stepper motors, 5 digital inputs for switches and pulse buttons and the ...
The simplest way would be to use a program such as puTTY in place of the Arduino Serial Monitor. puTTY can save data into a file. You could also write a program on your PC to receive the data and save it into a file. This Python - Arduino demo should provide some ideas - it would need to be extended a little to save the data into a file. You could do the same sort of thing with Processing ...
Serial data is slow by Arduino standards When anything sends serial data to the Arduino it arrives into the Arduino input buffer at a speed set by the baud rate. At 9600 baud about 960 characters arrive per second which means there is a gap of just over 1 millisecond between characters.
I made an awesome program the other day, and I wanted to upload it to my Arduino. After clicking the upload button, some mean dude named avr came along and stopped me, saying: avrdude: stk500_get...
