Questions tagged [arduino-setup]

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How to Connect Two CQRobot Ocean Non-Contact Water/Liquid Level Sensors (CQRSENYW001) to Arduino UNO REV3 (A000066)?

I am a complete beginner trying my hand at a home automation project. Part of my setup includes using an Arduino UNO REV3 (A000066), and connecting two CQRobot Ocean Non-Contact Water/Liquid Level ...
Cody Kentucky's user avatar
-1 votes
2 answers
87 views

Atmega 328pu on breadboard. What to choose in order to upload code with ftdi converter

When I program atmega328 PU on breadboard,vwhat programmer do I have to use and what arduino board type I have to choose? I am trying this with ftdi converter I have already done the connections and ...
Alexis Tsetsonis's user avatar
0 votes
1 answer
146 views

boards.txt - how to create sub-menu (NOT new board!!!)

Arduino 1.8.19 Is it possible to create a sub-menu inside boards.txt that would allow having the boards grouped for example by the manufacturer? If it is possible, please provide an example or at ...
Tomáš Viks Pilný's user avatar
1 vote
2 answers
528 views

how to config the Arduino ADC'S input on A0 instead of use default?

I am try to build this AC-DC meter, the code original used default A3 as input, how can change the input on A0? the link: https://simple-circuit.com/arduino-autoranging-ac-dc-voltmeter-with-trms/ ...
oldbin's user avatar
  • 11
0 votes
1 answer
341 views

Initialising timer interrupt crashes Mega 2560

Below is the entirety of my prototype code, the cycling of pin 13 is what I use to confirm the board is restarting. The board resets continually on this implementation of initialising the interrupt. ...
J Collins's user avatar
  • 295
1 vote
1 answer
558 views

Arduino MKR GSM 1400 fails to start up without Serial Monitor [duplicate]

This question is similar to another question, but I have added more details. See: MKR GSM 1400 Works only when connected to computer. I have designed and built a custom board into which I plug an ...
Gineer's user avatar
  • 133
0 votes
1 answer
63 views

what is causing my esp8266 setup function to reinitialise?

Here is code I have written: #include <stdio.h> #include <ESP8266WebServer.h> #define MAX_WIFI_INIT_RETRY 50 #define WIFI_RETRY_DELAY 500 const char* wifi_ssid = "ssid"; const char* ...
Ciasto piekarz's user avatar
1 vote
0 answers
26 views

Why calling digitaWrite(pinNum,HIGH) before setup() not working? [duplicate]

I am writing a library to operate a linear actuator, let's call the library ActuatorV2. It is composed of two files, a .h and and .cpp files. To create an object, I instantiate the object as follows ...
Omar Alamoudi's user avatar
1 vote
1 answer
297 views

Hook Arduino up with thermal printer and power both externally

Disclaimer: I have no connection to adafruit. A friend and me want to build a little project. We want to connect an arduino to a thermal printer and then print out little fortune-cookie like messages,...
Cedric Jansen's user avatar
11 votes
2 answers
21k views

Multiple .ino files in the same sketch

Yeah yeah, I know people ask this type of thing a lot, but I couldn't find an answer anywhere. I understand that you can have multiple .ino files in one sketch, but I don't just want functions and ...
Levi Lesches's user avatar
0 votes
2 answers
87 views

Rescuing an Arduino With a Broken Setup()

I may have bricked my Arduino Pro Micro by writing a broken code into the setup() function. When I plug my Pro Micro into my PC, I see it register a COM port for a brief moment before it disappears. ...
Bo Thompson's user avatar
1 vote
1 answer
691 views

I need help setting up my Arduino Uno with the port [duplicate]

I'm using a Windows computer, and if I recall correctly I installed the IDE using the installer, so I probably don't need to manually install the drivers. However, I can't figure out how to set up the ...
Amir Atreides's user avatar
2 votes
0 answers
184 views

How can I use delimiter/split serial input in a loop function? [closed]

How can I use delimiter/split serial input in a loop function? I want to use each word from the input and check a database, to check availability. #include SoftwareSerial.h> #define ...
Vian's user avatar
  • 21
0 votes
3 answers
405 views

Generating random pattern on startup

I'm trying to get an arduino to generate a random pattern in a neopixel grid every time you restart it. But I only get the same number sequence generated each time. What I'm doing wrong? Here's the ...
miss_n's user avatar
  • 101
0 votes
1 answer
1k views

Arduino as switch for external circuit

I am trying to use the Arduino as a switch for an external circuit. I first thought about using a shift register, but this wont allow me to switch the external circuit. Here is a little sketch of ...
Tom's user avatar
  • 103
0 votes
2 answers
2k views

How to handle an error in setup()

What is the "proper" way to handle an error during setup on an Arduino -- for example some attached component is missing or returning an error code or invalid response? The setup() function returns ...
ThatAintWorking's user avatar