Questions tagged [arduino-mega]
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.
1,792
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What power supply to use?
I will use three stepper motors of current:2A each and arduino mega rev 3. My question is how can I decide what power supply to use for this combination?
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26
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Error with Mega2560 via SPI
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....
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1
answer
94
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How to prevent an Arduino connected to the Internet from being hacked?
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 ...
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14
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Stepper motor not working with A4988 driver
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-...
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0
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50
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DS1302 RTC module running too fast
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 -> ...
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2
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33
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DHT11 sensor burnt after connecting with arduino board
I was attempting one of the project of DHT11 and connected the sensor to my arduino board but when the current passed the sensor became very hot and i think it is damaged now. Please help me
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31
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Cannot connect Arduino Mega 2560
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 ...
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34
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I am trying to convert 40V DC to 24V DC using Arduino, is it possible to convert?
#define pwm 6
void setup() {
// initialize serial communication at 9600 bits per second:
pinMode(6, OUTPUT);
Serial.begin(9600);
}
// the loop routine runs over and over again forever:
void ...
2
votes
1
answer
31
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Using MFRC522 along with other inputs(Bluetooth, keypad)
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 cant get inputs from other sources if i want to get ...
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40
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Communication between two hc 05 Bluetooth modules not working
I Have a problem with the connection between two hc 05 modules. The bluetooth modules are paired using AT commands. But when I run the code I cant get any data from the reciever. The bluetooth modules ...
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0
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48
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Converting more strings from serial monitor to int arrays
I want to transfer 8 lists from a python script, via Serial Monitor to the Arduino. I can get the strings to Arduino and Arduino saves them as String array, but I can't change it to integer (it shows ...
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0
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22
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Megaboard Problems about pySerial Communication from Python to Arduino
I asked same question on another forum, but i need more opinions and advices.
I wrote a simple Python code and Arduino code.
In my code, the Excel matrix data is loaded into Python,
then converted ...
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0
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1
answer
115
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DS3231 with Arduino Nano for Timing precision
I am in need to synchronize two separate circuit boards working with Arduino nano. The need is to activate one relay using Arduino-1 after 45 min and another relay using Arduino-2 after 45.36 seconds. ...
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1
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81
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Arduino nano timing precision
How precisely can an Arduino nano be timed? The project I am working on needs two Arduino nano to work synchronously. Arduino one have to activate a relay after 2700 sec and Arduino two have to ...
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26
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Adding RTC Library for Arduino Project in Visual Studio
I am working in an Arduino project in visual studio. I need to get and set time to a RTC clock. That's why I am adding a ds3231 header file in my project from GitHub. When I want to build "it's ...
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2
answers
119
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Arduino does not connect to MQTT local broker
I have an Arduino Mega with Ethernet connected to a router by cable. Also I have a PC connected to the router (by Wifi) where also the local MQTT broker is installed (mosquitto). Althought the Arduino ...
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1
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69
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control 12v motor with NPN transistor via arduino
i want to control this 12v motor via arduino:
Power source is 12v 5A
motor will work 5 seconds in every 5 minutes and will be activated throught arduino mega
i will try to use bd679a darlington ...
1
vote
1
answer
163
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Run encoder code simultaneously with other code in Arduino
volatile unsigned int temp, counter = 0;
int county=0;
void setup()
{
Serial.begin(9600);
pinMode(2, INPUT_PULLUP);
pinMode(3, INPUT_PULLUP);
attachInterrupt(0, ai0, RISING);
...
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0
votes
1
answer
85
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Use Arduino MEGA generate 40kHz multiple square wave signal with 10 phase
I want to use Arduino-mega generate multiple square wave signal,the siganl is 40kHz and it can be used to drive ultrasonic transducer.
So,I use the trategy in article "Ultraino: An Open Phased-...
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1
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93
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How many stepper motors can you run on one Arduino Uno? Ideas on how to run 9?
I am in middle school and new to Arduino. I just learned to set up and code a stepper motor on my Arduino Uno from watching YouTube videos. I want to set up 9 stepper motors to all run at the same ...
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3
answers
82
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Is there any way to efficiently code reading of four sensors and sending a serial output once it does detect a reading?
I am actually wondering if there's a way to efficiently do this block of code. There are two things in my specifications and these are:
Four IR Sensors that detects blockage. Basically just to ...
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1
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59
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How to architect streaming data from multiple plant monitors to single Arduino?
Premise:
I'm trying to determine a good way to architect getting data from 4 plant monitors to a single Arduino. For context, that Arduino will have a Wifi connection that will transmit the data from ...
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1
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73
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Balancing pendulum using PID
Dear all, referring to the video at here on how to make a PID balancing pendulum as shown in the picture and the author also provided the arduino code in the video description. May I ask whether this ...
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1
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208
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How to find the correct navigation course by gps navigation with Arduino?
I have a problem for about days ago and here it is :
I have an RC plane and wanna make it autonomous via GPS navigation by Arduino
I have an Arduino Mage 2560 onboard connected to a GPS Ublox-Neo-M8N (...
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1
answer
48
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Arduino Mega, 6 push buttons for each analog input (A0-A9) - closing one results in reading by other
On day to day basis I'm more of a high level programmer, with little electronics knowledge, apologies in advance if I lack some nomenclature or basics. I communicate with my Arduino Mega via firmata, ...
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1
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68
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Arduino outputting 4.7V instead of 3.3V when using I2C communication/sensor?
TOF050C-VL6180X Sensor was not responding, so I checked it with a multi-meter, and the VIN, GND solder pins on it read 4.7V. Double-checked Mega voltage, without anything connected, and it shows ...
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1
answer
64
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MFRC522 board not detected. Red LED lighting
Mega 2560.
I can't get the RFID board detected. The code is below, and outputs "Didn't find MFRC522 board.". I also tested some other library and test code with success.
I triple checked the ...
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0
answers
54
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Need help with calling an API using an Arduino system
As stated in the title, I need help with calling an API. I'm trying to integrate make a call using the Verkada API but it seems to be using a cURL library that I'm not entirely certain I can get to ...
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2
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160
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Voltage reading problem in Arduino mega based 10 cannel battery capacity tester
I want to make a 10 channels Arduino mega-based battery capacity tester using 4.7 ohms 10w resistors controlling them with IRFZ44n MOSFETs with respected digital pins. An 8.4V battery powers the ...
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0
answers
46
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ArduinoMega2560 throws avrdude: com-state error after pressing the reset button a few times
I have recently switched to an ArduinoMega2560 (authentic) from the Arduino Uno and have been having a bit of trouble with uploading sketches after the reset button has been pressed a few times. This ...
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2
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79
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Standalone ATMega328 - do I need to burn the bootloader?
I want to get an ATMega328 off of the Digi-Key, and use it like an Arduino (without requiring the whole Arduino board).
When it comes to programming, do I need to do anything special like burn the ...
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1
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69
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Using Millis instead of delay to reboot relay
I want to reboot relay (turn off , waiting 4 seconds and turn ON)
it works perfectly if I use delay(4000), but code is blocked while delay (4 seconds) and I cant start relay 2.
How can I use Millis ...
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82
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ESP8266 TIMEOUT: 428
this is the code I used:
#include <Wire.h>
#include "WiFiEsp.h"
// Emulate Serial1 on pins 6/7 if not present
#ifndef HAVE_HWSERIAL1
#include "SoftwareSerial.h"
...
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0
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37
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Trying to understand stepper behavior, and I have some specific questions
I'm using a repurposed MKS Gen L V1.0 board (arduino MEGA + RAMPS, basically) to control a pair of IR sensors and a NEMA 23 stepper with TB6600 driver.
The application is simple: raise and lower the ...
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1
answer
59
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Error while burning bootloader onto ATMega-8A using Arduino Mega 2560: avrdude: invalid byte value
So, I'm trying to burn the bootloader onto an ATMega 8A with an Arduino Mega 2560 as ISP.
I made the necessary connections, and got this error:
C:\Program Files (x86)\Arduino\hardware/tools/avr/bin/...
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1
answer
271
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Avrdude verification error when uploading to Arduino Mega 2560
I have been getting the error
avrdude: verification error, first mismatch at byte 0x036c
0xb8 != 0xf8
avrdude: verification error; content mismatch
avrdude done. Thank you.
When trying to upload the ...
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1
answer
58
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Arduino Serial to USB=>serial data issue
I am using Mega 2560 to receive serial data from another device but the data appears on the serial terminal are strange characters. then i connected my USB to serial cable (HL-340) to the device and ...
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1
answer
84
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Servo not moving with PIR motion sensor
I am working on this code to turn a servo when the PIR motion sensor detects no motion, but it is not working.
Some symptoms include:
Servo is turning extremely slowly
PIR is not turning the servo
...
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0
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47
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I’m having trouble getting a motor to run for 10 seconds and then reverse direction every time push button is pushed down
i am brand new to arduino and was looking for a little help. i am looking to activate a motor once the button is pushed for 10 seconds and then have it stop. then the next time the button is pushed, ...
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1
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57
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Connect an MPX10DP Pressure Sensor to an Arduino Mega 2560
I'm literally new to using Arduino, i am trying to build a Pitot Tube to measure airspeed using an MPX10DP differential pressure sensor and i am working with an Arduino Mega 2560.
Honestly, i have ...
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1
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184
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How can I clear two FastLEDs strip ws2812b separately? One strip is connected to pin 7 of UNO and other strip to pin 6 of UNO
The power supply is external. I want to clear one strip say pin 7, and meanwhile i dont want other strip say pin 6 to switch off...I use
FastLED.clear();
FastLED.show();
But it clears all the led ...
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2
answers
85
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How to display only specific data in the serial monitoring?
I got the following data as shown in the figure from imu razor which is connected to Arduino Mega 2560 in the serial monitoring and I want to get only the data that starts with "#A-R= "
Can ...
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1
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265
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Funduino USB Host Shield problems
I'm currently working on connecting a Funduino version of usb host shield onto an arduino mega board. But the serial output shows "osc did not start", which means the board can't find the ...
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2
answers
687
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Using Software Serial on Arduino Mega
So Im using this sensor:
https://wiki.dfrobot.com/Serial_6_Axis_Accelerometer_SKU_SEN0386 with this library https://github.com/DFRobotdl/DFRobot_WT61PC
Im using 2 sensors but got poor frequency on ...
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1
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69
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Fluctuation in 4 half bridge load cell via combinator
I'm currently using a Sparkfun 4 Half-Bridge load sensor (50 Kg) with combinator and amplifier both are from the Sparkfun. Link:https://www.sparkfun.com/products/10245 (For Load Sensors)https://www....
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78
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Unpredictable behavior of a 74HC595, Q0 has no output and LED flickering
Below is my schematics:
I am using a 74HC595 shift register and to test my connections, I have placed 8 LEDs to the output and shifted 0xFF into the shift register (1111 1111), this should light up ...
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1
answer
54
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How to shift binary into a shift register (serial in, parallel out) sequentially
I'm trying to make a continuity tester at work where I connect the input and output of a harness into a test fixture powered by an Arduino. This tester tests whether the position of the connects are ...
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1
answer
40
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Arduino battery capacity selection based on the current measurements
I'm sorry for this stupid question...
I'm not an electronic/electric expert..
In order to select the battery capacity as well as the solar panel I'm measuring the Arduino current consumption.
So, I ...
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1
answer
866
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Sending float values from Python to Arduino using Serial communication
I need to send an array of floating-point numbers from python to Arduino Mega. For that, I read many sources [this this this this this] this] and many more links for the same I referred. But unable to ...
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1
answer
67
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Using a 5 pin button with Arduino Correctly
I am trying to build a simple motor test sketch, currently, to test a NEMA 23 stepper motor and the DM542T stepper driver.
Here is the code, and I am having trouble figuring out how to properly wire ...
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