Arduino Stack Exchange
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Questions tagged [arduino-setup]

16 questions
12
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2 answers

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 variables separated, I want functionality. I am…
Levi Lesches
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How can I use delimiter/split serial input in a loop function?

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 MAX_WORD_LENGTH 15 char messageArray[5][MAX_WORD_LENGTH +…
Vian
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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 Sensors (CQRSENYW001). There is great documentation…
Cody Kentucky
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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/ Thanks for…
oldbin
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1
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1 answer

Arduino MKR GSM 1400 fails to start up without Serial Monitor

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 Arduino MKR GSM 1400. It's a basic IO abstraction…
Gineer
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Why calling digitaWrite(pinNum,HIGH) before setup() not working?

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 Actuator…
Omar Alamoudi
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1 answer

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, when a button is pressed. The whole setup should…
Cedric Jansen
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I need help setting up my Arduino Uno with the port

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 serial port with the Arduino. For me under…
Amir Atreides
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0
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1 answer

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 least documentation for the language which is used…
Tomáš Viks Pilný
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1 answer

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. There is no code implemented for the interrupt,…
J Collins
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what is causing my esp8266 setup function to reinitialise?

Here is code I have written: #include #include #define MAX_WIFI_INIT_RETRY 50 #define WIFI_RETRY_DELAY 500 const char* wifi_ssid = "ssid"; const char* wifi_passwd = "password"; ESP8266WebServer…
Ciasto piekarz
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2 answers

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. Grounding and ungrounding the RST pin causes the…
Bo Thompson
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3 answers

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 sequence that keeps happening: 1110 0000 1101…
miss_n
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1 answer

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 what I want to do : So basically I got this external…
Tom
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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 void so that's no help. This just doesn't seem to…
ThatAintWorking
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