Questions tagged [faq]
Frequently Asked Questions
7 questions
0 votes
3 answers
120 views
I have made a Nano send 4 pot values to an Uno please help with code
Happy New Year! So I have made a Nano send 4 pot values to an Arduino Uno over serial but I have a problem: I don't know how to separate these values. Here's the code: Master: int Pot = A0; ...
0 votes
4 answers
5k views
Strange compiler error (Segmentation Fault)
You're getting a compiler error. It happens in strange parts of code that really shouldn't be having a problem. The error looks something like: C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8....
4 votes
2 answers
332 views
Why do people complain when I call my functions voids?
I have posted questions about "my void loop" or "my void setup" and people complain that they aren't really voids. But they are! See this example code: void setup() { pinMode(13, OUTPUT); } void ...
- 38.9k
1 vote
1 answer
214 views
Why my ISR is giving impossible values?
I have a very simple ISR: const uint32_t PATTERN_A = 0xFF00FF00; const uint32_t PATTERN_B = 0x00FF00FF; volatile uint32_t count = 0; volatile uint32_t toggle = PATTERN_A; // My ISR void callback(...
user31481
1 vote
3 answers
2k views
Analog input draws current when Arduino is turned off
I am using a Arduino Pro Micro from SparkFun (similar to Arduino Leonardo, cpu: Atmega 32u4). It has a analog input: A0, which I use to keep track of the battery voltage in my battery powered project (...
- 13
1 vote
3 answers
13k views
My Arduino isn't showing up on my computer. What should I do?
You have your spangly new Arduino board, you've installed the software, and you plug it in. Nothing happens. Diagnosing problems may be a little tricky for the beginner, so what hoops should you go ...
184 votes
21 answers
678k views
"avrdude: stk500_getsync(): not in sync: resp=0x00," aka Some Dude Named Avr Won't Let Me Upload My Program
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: ...
- 5,302