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Questions tagged [arduino-mega]

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A microcontroller board based on the ATmega2560 or 1280 chip. Use this tag for questions specifically regarding the Mega, and not just general Arduino usage.

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For a race simulator I'm using several Arduino Mega 2560 boards on which the code that will post below will be running. (not my code! But freely available on the internet) Everything works fine, just ...
ArdActuator's user avatar
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I'm using an Arduino Mega with a Bluetooth ELM327 adapter to read live data from my car’s OBD-II port — specifically RPM (PID 010C). The goal is to log data to an SD card or display it in real time. ...
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I'm using an Arduino Mega 2560 to control a DRV8871 motor driver connected to a DC brushed motor. The setup includes: Three buttons: UP, DOWN, and FAST One limit switch input, where the upper and ...
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I have an Arduino Mega, and I run out of interrupt pins. I have only pin 18 available, but I need 2 of them. What can I do? pin INTx digitalPinToInterrupt(pin) 3 INT5 1 2 INT4 0 18 TX1 INT3 5 19 RX1 ...
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I am trying to control a DC motor using the L9110 motor driver and Arduino MEGA 2560. Here's the code. #include <Arduino.h> const int rightA = A3; const int rightB = A2; void setup() { ...
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Newish person here. Have done a few smaller projects, looking at something a bit bigger and need direction on where to start. I'm building a guitar effects pedal board that I want to be able to ...
Dustin Lobner's user avatar
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Does Arduino support C++ module import functionality i.e. what would it require to implement something like this in Arduino: import std;?
beebee's user avatar
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What is a missing puzzle in here, relay, transistor? I would like to pull pin of external device to the ground programatically using arduino's digital pin.
Maleowy's user avatar
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An interrupt routine is executing unexpectedly, and I can't figure out why. Can you please have a look? Hardware is a generic (knock off) Arduino Mega, with an unused Ethernet shield, and a touch ...
Mike's user avatar
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We're using the ESP8266 to receive data from the Arduino Mega board, where our sensors are connected. Supposedly, our ESP is connected to the Blynk App. However, the values showing up in our dashboard ...
Earth_Lovers's user avatar
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I am trying to follow this tutorial, SIMPLIFIED! How to Use OV7670 Camera with Arduino (other tutorials are also the same) and I noticed that my Camera module has different pin names, what do I do? ...
Aland Salam's user avatar
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I am working on a custom SD card data logger using the following function and struct: char *filenameCreator(const char *prefix, const char *num, bool addExtension) { char *filename = (char *)...
Daniel Melendrez's user avatar
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I wrote code for my transmitter Arduino. I want to send the data to the receiver Arduino through Tx and Rx serial. The issue is that I could not discard the char "T" and it appears as output ...
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I have the code below and it doesn't work with my URL. I receive a 715(Handshake Failed) This code below works normally, but with my API it doesn't work. I'm using a A7670SA with Arduino Mega 2560. ...
Ramon's user avatar
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I'm a little bit loss because I'm learning how to use the interruptions on Arduino. I'm creating a program to read an RFID code that arrives if an RFID transmitter is close to the antenna (a little ...
Aeva's user avatar
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I am trying to use an Adafruit PCA9685 servo driver module with an ELEGOO Mega 2560 board. I am supplying the servo driver board with 5 V and tested all the wires to make sure. I tested the servo ...
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I would like to control three LEDs with a string variable using an Arduino Mega. I have connected the three LEDs to pins 10, 11 and 12 of the Arduino. If my string equals Red, the red LED should turn ...
learn design's user avatar
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Hello I am trying to make a request using WiFiEsp library but even the examples not working, I have searched a lot but never solved it. most of the solutions are outdated and do not solve anything, I ...
OSMX's user avatar
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I'm working with a custom C++ library, CPSTL, for Arduino, which includes a cpstd::vector class that is designed to work with cpstd::initializer_list, cpstd::initializer_list is supposed to mimic std::...
Cheche Romo's user avatar
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I have a robot that uses 4 mechanical arms. Each mechanical arm has 4 "READYTOSKY 30kg" servo motors on them. At some point, I need to use the absolute maximum force of only two mechanical ...
Noy's user avatar
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I have this pressure transducer: https://www.amazon.co.uk/dp/B07YZL6TYD?psc=1&ref=ppx_yo2ov_dt_b_product_details The transducer has a range of 0.5v to 4.5v which translates to 0 psi to 100 psi. ...
masafood's user avatar
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I want to control the LEDs with my hand, for this I used the repository https://github.com/paveldat/finger_counter/tree/main. I want to control the LEDs with my hand, for this I used the repository. ...
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In my project on Arduino, I want to implement turning on the whole circuit by long press of a button. But at the same time, I want the Arduino to be turned off in standby or sleep mode, but I don't ...
EndyVelvet's user avatar
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I'm having issues connecting to my arduino mega via ethernet. Its a very basic start to the code just to get the network side up and running, them im going to add in what I actually want it to do. For ...
Isaac M's user avatar
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I am using the below code to check temperatures from 36 DS18B20 sensors using Arduino Mega 2560. If any one of them go above 50 deg. celsius, then it sets the output pin to HIGH. I am trying to run ...
Siddharth Chakravarty's user avatar
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I am using the fantastic ArduinoJson library for working with JSON data on my ESP8266. I have been facing issues with random software wdt resets and have been investigating memory leaks wherever I can....
First User's user avatar
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This is my current code (Arduino Mega 2560): #define p1 2 #define p2 3 void setup() { pinMode(p1, OUTPUT); pinMode(p2, OUTPUT); Serial.println("ARDUINO : CONNECTED"); } void loop() { ...
Ganang Wahyu W's user avatar
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I need to support 18 push buttons and 66 IR sensors on my Arduino Mega (model railway). I have a Mega Sensor Shield, but won't have enough pins for all the sensors. Can I get a second sensor shield ...
PaulN's user avatar
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I have a MKS GEN L v1.0 3dprinter board that works fine uploading using the IDE. But I need to install to it using the arduino-cli. For some reason, the command arduino-cli board list says that the ...
steve antwan's user avatar
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I am building arcade game with 10 player buttons (5 for each player) and one start button. All buttons have build in LED inside. Player buttons has LED for 12V and start button has led for 5V. I am ...
andz's user avatar
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I have an arduino mega connected to a light sensor that reads the status of a machine's indicator light. I have a C++ application that controls the machine, and I would like the arduino to send the ...
Max Bluhm's user avatar
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I have been going through some resources on bootloaders, programmers, etc (I'm very new to this specific subject) and how they work with the Atmega chips and Arduino board programming. My research may ...
First User's user avatar
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I wanted to write a library representing a sensor to later on have an array of sensors. I generated a file MoistureSensor.h: #ifndef MoistureSensor_h #define MoistureSensor_h #include <Arduino.h&...
Nico Sz's user avatar
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I have an ESP8266 module which has downloaded a hex file for an Arduino Mega2560. This hex file (call it mega2560.hex) is sitting in the ESP's SPIFFS file system. What I want to do is basically ...
First User's user avatar
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I'm trying to plot the value of the pwm that increases (every 2 sec) then decreases to compare it to the value of an encoder. I was expecting a continued value (like a step ) during 2 seconds but ...
Lavender Juliette's user avatar
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I am currently controlling two servos using the Arduino IDE, but now need to integrate my Arduino code into a Python script. I read about how to use PyFirmata and went through the process of uploading ...
Eeshan Mishra's user avatar
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I have a slave arduino connected to a master arduino mega (through UART) and to a RPi (through USB). The slave arduino is set to monitor various SHT85 (through I2C) and NTC sensors. What I would like ...
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it has been a week that I'm struggling with the arduino to measure the RMS Voltage value. By OSC I can see that the RMS voltage value changes around 3V. But I can't see it by serial port. I think my ...
Farzaneh's user avatar
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Heyo everyone ! I'm in a project where I need to send a signal if I detect vaccuum. I'm sending the signal on PIN 9 but I soon realized that I was only getting 1V. Tought I was alternating between ...
O'Schell's user avatar
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I am using MAX7219 8 digit 7 segment displays with Arduino Mega2560. Now, I have to physically space out the displays far from each other. Hence, after a certain distance the displays on the far end ...
Soumarya's user avatar
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I have Arduino MEGA with Ethernet Shield and a SD card connected to a RUT950 GSM router. Then, I also have two sensors connected to the router and they run a TCP server that sends measurements ...
Marcus Barnet's user avatar
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I am looking to see if I can change the attached sketch which controls 8 stepper motors to just switching 8 relays for a weaving loom which we have, unfortunately making this change is well above my ...
Vaughan Ratahi's user avatar
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I am trying to do a loopback test using an Arduino Mega. What I am looking to do is send a byte over TX and receive said byte back at RX and verify that the byte is unchanged. More or less I just have ...
mnlipps's user avatar
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Analog pontentiometer connected to an Arduino. simplest possible setup. The goal is to send a message over Serial whenever the value changes. I do not want to spam the Serial connection to much, so ...
David's user avatar
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I tried the following code to communicate via SPI with MPU9250 and Mega2560 But I got the following error: Error initializing communication with IMU Why I got this error? /* * Brian R Taylor * brian....
m-m's user avatar
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I have an Arduino (with environmental sensors doing measurements) connected to the Internet via ethernet. Can it be hacked? Can someone access it via Internet and upload his own C/C++ code? If, yes ...
greg's user avatar
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I have been trying to run stepper motor via Arduino Uno and A4988 motor driver via this tutorial: https://howtomechatronics.com/tutorials/arduino/how-to-control-stepper-motor-with-a4988-driver-and-...
user89175's user avatar
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I am using a DS1302 RTC module with an Arduino Mega 2560 Rev 3. I follow steps on this website since I have no experience with RTC module before. Here are the outputs I am getting. 17:15:21.835 -> ...
Leo Liang's user avatar
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I was able to work with the same Arduino on the same laptop yesterday. However, the Arduino IDE is unable to connect the Arduino Mega 2560 today. I tried with a different Arduino Mega 2560 but the ...
Leo Liang's user avatar
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2 votes
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I'm making a little parking lot, which includes mostly opening a servo motor using either keypad, Bluetooth (hc-05) and freshly added, RFID (RC522). I can't get inputs from other sources if I want to ...
Barzy's user avatar
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