Most voted "arduino" questions
Arduino is an open-source electronic prototyping platform based on flexible and easy-to-use hardware and software. It is aimed at artists, designers, hobbyists, and anyone interested in creating interactive objects or environments. This tag should be used when the problem is specific to Arduino.
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viewserror in ultrasonic sensor
I’ve tried several times to find the problem but I’m a layman in scaring yet and the following error keeps reproducing expected primary-expression before 'convert' if someone knows how to solve and…
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answers19
viewsArduin build error
my code on the Arduino void setup() { // put your setup code here, to run once: int pinoMotor = 11; int pinoBotao = 12; int on = 0; int estadoBotao; pinMode(pinoMotor, OUTPUT); pinMode(pinoBotao,…
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viewsHow do I connect Arduino with esp-01 to myphpadmin?
I have a mega Arduino attached to a esp-01 as follows Arduino-------------esp-01 3v3 gnd------------------gnd Tx-----------------Tx Rx-----------------Rx reset-gnd | en--gnd…
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viewsESP8266 400 BAD REQUEST when connecting to an API using dynamic parameters
I am trying to make an RFID reader using ESP8266 to check via API whether the card/tag has access authorization or not. When I try to dynamically place the card data in my URL it displays a 400 BAD…
arduinoasked 3 years, 3 months ago Leticia Rosa 1,184 -
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answer865
viewsConversion from flowchart to code
I am trying to convert a sizable size flowchart to Arduino code. The flowchart is as follows:: Considering your size, I’d feel more comfortable using the remote goto as a flow control. However I…
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answer94
viewsArduino DHT11 how to adapt to this code?
How can I use the dht11 sensor here? #include <SPI.h> #include <Ethernet.h> #include <SD.h> // size of buffer used to capture HTTP requests #define REQ_BUF_SZ 60 // MAC address…
arduinoasked 7 years, 9 months ago codeinicial 77 -
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answers1757
viewsHow to convert . Ino(Arduino) code to . Hex?
How to convert my Arduino code (.Ino) to .hex. I don’t want to use the IDE (Arduin). There is a way to do this?
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answers542
viewsBluetooth communication between android and Arduino for interaction with grbl
How to do Android then connect with Arduino via a Bluetooth module for O Arduino receive data. I just need to understand the part of Android would be a Bluetooth Serial. I found this code on…
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answer236
viewsCOM serial port
I’m trying to execute a code every time, where it takes the value sent by the COM port of the Arduino, prints in a textbox and soon after generates an Insert in the mysql database. Only that he read…
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answer129
viewsHelp to get struct values(Arduino,C++)
I am developing an application with esp32 (similar to Arduino) that gets date and time from an NTP server. Use the following function to display these values: void printLocalTime() { struct tm…
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answers72
viewsWhy divide the potentiometer value by 4?
int ledPin = 13; // pino do led int analogPin = 3; //pin for potentiometer reading int val = 0; //variable to store the read value void setup() { pinMode(ledPin, OUTPUT); // sets pin as output }…
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answer285
viewsArduino with counter
I can’t understand what’s wrong with that code S1 once and M1 stay turned on but it turns off after a while. The program also doesn’t count as it should. The question is this: In the system below…
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answer57
viewsArduino leds lighting up without pressing the button
I don’t know why, but the leds light up even if I don’t press the button. int button = 12; int led1 = 2; int led2 = 3; int led3 = 4; int led4 = 5; int led5 = 6; int led6 = 7; int buttonState = 0;…
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answers109
viewsSimple Arduino program
I’m new to programming.... The program I’m trying to write to run on the Arduino, will command a circuit that has two buttons. The 1 button is to turn on an Led and it runs the sequence of flashes.…
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answers266
viewsHow to store the values of a phpMyAdmin table in a variable/array/array and use it in Arduino code?
My school work consists of a basic security system using card frequencies, in a similar way to buses: passes card in the reader, if the frequency is X releases the ratchet, if it is non-X the…
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answer25
viewsCode issues for a lap counter on a line-follower robot on the Arduino
Hello, I am beginner in the programming study with Arduino, and my teacher asked for the following exercise: "Using the line follower code implemented in previous lessons, the student must implement…
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answer34
viewsWhy does Arduino stop sending data?
The application (C# .Net Framework 4.7.2 in Visual Studio 2019) I’m doing sends a command to Arduino via serial and Arduino sends 'n' sensor data. However, the first time I run the program, nothing…
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viewsHow to insert data into sql without erasing old data?
Hello. I’m learning sql now, I’m trying to make a simple python code to store 4 data in sql database. But every time I stop the code and run it again, it erases the bank and starts again. I couldn’t…
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answer98
viewsHow to use two sensors in the Arduino and show the data in a C#application?
I have a code in the Arduino where has 1 ultrasonic sensor that measures the amount of liquid, and in a tank a flow sensor that measures the amount of water consumed. In the other code C# I have an…
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answer28
viewsI need to put a Push Button to change the direction of the engine - Arduino
This code below makes the engine go forward and after 3 seconds go back repetitively, but I would like it to go forward by clicking the push button and then go back by clicking the push button, I’m…
arduinoasked 4 years, 5 months ago Johnny Dalfov 1 -
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answer86
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