Questions tagged [atmega2560]

Low-power 8-bit AVR microcontroller with 256kB flash.

35 questions with no upvoted or accepted answers
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80 views

Adafruit_LEDBackpack library interfering with analog input reading

I'm trying to do something I think would be simple. I'd like to read the input of a electret microphone board and update the Adafruit 24-segment LED Bar Graph. I got each individual item working ...
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0answers
61 views

External Interrupt and Input Capture pin | Arduino MEGA

I have a code for finding the rpm of one system calling here as engine , the engine have a hall sensor output and I have tried the following Code #define SERVO_MIN 2000 #define SERVO_MAX 4000 struct ...
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112 views

Erasing all flash on boards with over 64kb of program memory

I'm using a Mega2560 board. My project needs to store some large constant data. To preserve the first 64kb flash chunk, I write these data on addresses beyond this limit. But there is either an ...
2
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1answer
346 views

Did I just brick my ATMEGA 2560?

I bought an ATMEGA2560 on eBay and programmed it with Arduino IDE 1.6.9 using the USB cable, and the LED blinked as expected - All well and good. Now I wanted to program the mega from my UNO as ...
2
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0answers
218 views

Intermittent wifi/hotspot connection

I have an Arduino Mega 2560 with a cc3000 Wifi shield that is sending messages to dweet.io. Here is the relevant portion of my code: // Post data to dweetio char data[125]; sprintf(data, "?t1=...
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0answers
118 views

Arduino not responding while trying to flash over BLE

I'm working on wireless uploader for Arduino from iOS devices. I'm using HM-10 BLE module which seems to work ok. PIO 2 is used as DTR for resetting (see A [0x41] T [0x54] + [0x2B] P [0x50] I [0x49] O ...
1
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0answers
43 views

Program a mega2560 from a different Serial port

I want to be able to use my HC-05, currently on Serial3 to download code to on my 2560 from a connected android tablet. I'm currently running MegaCore, which has optiboot on it. I've looked for ...
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0answers
40 views

ShieldBuddy TC275 as a drop-in replacement for MEGA 2560?

I have an autonomous wall-following robot based on a Mega2560, that is just about maxed out in terms of memory usage and speed. I'm starting to have weird intermittent failures with previously ...
1
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1answer
110 views

How to change i2c address of Lidar Lite v3 using LidarLite library (Solved)

I have 2 Lidars which are Lidar Lite v3 and Lidar Lite v4, both of these sensor having the same i2c address. I'm trying to change my Lidar Lite v3's i2c address on arduino mega2560 using a function ...
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76 views

Program only works with Serial.begin

My program only works when the following line is added: Serial.begin(9600); When this is disabled/removed the program no longer switches output state regular I'm using an Arduino Mega 2560. When the ...
1
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0answers
58 views

sim808 init error when trying to use DFRobot to get gps

I'm using "mega 2650 pro" Arduino with SIM808 BK-808 V-3.1 and I connect the vcc for the sim808 to 5volt pin in the arduino, and the arduino connected with laptop usb. and I add a sim to the ...
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0answers
48 views

ISR for timer on Arduino MEGA gets called only once

I am trying to write an Arduino code to blink LED using timer 4 on Arduino MEGA (atmega2560). I resetted the timer registers, and entered all the necessary values to bring to 16MHz to 1Hz (rescalar = ...
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0answers
60 views

it just gets too hot . any way of cooling it?

there i just got started with the arduino mega2560 . i tried 8x8 matrix tube and after ~30secs i found the atmega2560 a bit hot that i can melt a small amount wax on it ! is there any sort of heatsink ...
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81 views

Arduino mega PinChangeInterrupt with 16 bit timer

With reference to this question ::I have written a program by using 16-bit timer, The program is as follows . volatile uint32_t ovfCount = 0; struct Pulse { uint32_t last_toggle; uint32_t width; ...
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0answers
61 views

Fail to burn bootloader into standalone atmega2560

I am making a project where I use standalone atmega2560. I used arduino mega schematic to put all necessary components so atmega2560 would be working. I tried to burn bootloader into it using arduino ...
1
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0answers
44 views

Upload of software working unreliably

I've got a new Keyestudio ATmega2560 (compatible with Arduino Mega 2560) board and was trying to upload a simple sketch. I noticed that both the Arduino IDE and PlatformIO were unable to do so, they ...
1
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1answer
140 views

How to identify pinout of ATmega 2560 derivative board?

My 3d printer, Creality Ender 4, has an ATmega 2560 chip based card, and I need to identify the number associated with a particular Pin. I read, on the official Arduino website, a simple tutorial in ...
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0answers
113 views

CC2541 Bluetooth AT Commands not work for any Commands sended from Serial

i bought the HM 10 Bluetooth controller (CC2541), i got connect on this device through Serial Bluetooth Terminal (Android App) with Serial BLE menu this method not requires any pass and "...
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0answers
139 views

Atmega 2560 IR receiver returning random values with using NeoPixels

I am using atmega 2560 to control 590 LED lights with NeoPixels library. I also got an IR receiver connected so I could control the LED properties and it does work but only when the LEDs are not ...
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0answers
79 views

I am trying to rewrite an RFID with a MEGA2560 and a RFID-RC522

I have been trying to rewrite an RFID tag so it is the same as my other one. I have code that will read both separately but I cannot find any already written for the MEGA2560 that will work for me. ...
1
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1answer
61 views

Activating a defined macro in a class from main.cpp

Sorry if this question been asked. I'm trying to activate certain function in a class using a macro defined in the class from main.cpp. I'm using jrowberg MPU6050 library if that matters. main.cpp #...
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100 views

Problem with I2C

I trying to make a project to write and i2c display from a renault megane vehicle. There is many people showing it but there is no code that i can use. So i buy a cheap analyzer and i can clearly see ...
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0answers
64 views

Using SMS to receive password, then to choose whether to turn the relay on or off

I'm trying to use SMS messages to turn a relay on/off but before doing that i need to have a password system before allowing the user to turn the relay on/off. Basically, you have to send the password ...
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0answers
71 views

Arduino code does not function when relays are powered

I have a mega arduino, which is supposed to to power 4 relays using 4 touch sensors TTP 223, the relays are 5V coil and 220V. the arduino is powered by a 5 V adapter "mobile phone charger" and it ...
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0answers
321 views

Advice needed for powering Multiple HX711 with Arduino Mega

I have a project where I need to use multiple load cells (6-8), with individual HX711 for each load cell, which need to be powered simultaneously. I am not sure if I can power all the HX711 with 5V ...
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0answers
90 views

MEGA2560 only starts program after pressing RESET button multiple times

I am working on a program where I am controlling an MP3 player by using UART between my MEGA2560 and the MP3 player. The MEGA2560 sends serial commands to the MP3 player when external interrupts are ...
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0answers
198 views

EEPROM.read data not comparing with DHT11 sensor value - Arduino temp controller

I'm using a DHT11 to read temperature to control a relay that will control a fan. When 'A' is pressed it allows the user to update the temp value that the relay will go HIGH at. The value is being ...
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140 views

Sketch works on MEGA 2560 timer2, but does not work on timer1

I set the PWM frequency on MEGA 2560 like this: TCCR2A = 0; TCCR2B = 0; TCNT2 = 0; TCCR2A = _BV(COM2A1) | _BV(COM2B1) | _BV(WGM20); ...
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0answers
535 views

How to program an SSD1322 display?

I'm new to programming. I would like to change the characters on an SSD1322 OLED display. Here are the photos. Is this possible with an Arduino Uno? Is the program of the display in the display or in ...
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2answers
172 views

Is an atmega 2560 board compatible with the Adafruit Trellis?

I want to build a custom midi controller for my computer, and yes, Adafruit has a mini Untz project. For my purposes, I need more analog inputs than the Leonardo, and the only other option I can find ...
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0answers
136 views

RF 433MHz Sniffer

Folks, I am trying to compile and load the "RCSwitch : ReceiveDemo_Advanced". When compiled, it comes up with an error message Output was not declared in this scope. There is an "output....
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989 views

OneWire with DS18B20 digital sensor only works on the I2C (20 and 21) pins of my Mega?

I am using an Arduino Mega to read a DS18B20 temperature sensor using the OneWire library in the code below which I got here: #include <OneWire.h> #define DS18S20_Pin 20 //DS18S20 Signal pin ...
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0answers
66 views

Is there an easy way to connect and control 3 servos?

I need to connect and control three Parallax Standard Servos to an Arduino board, and apart from the USB connection, nothing else will be connected to the board. My predecessor used a setup of and ...
0
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1answer
71 views

Which board's bootloader is on the microcontroller?

Currently I'm doing a project that needs an Atmega2560 standalone MCU. After I burned the bootloader with this method: http://www.gammon.com.au/bootloader . I set the Board as "Arduino/Genuino Mega or ...
-1
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1answer
100 views

Controller freezes

I am using atmega 2560 as main(master) controller and other 5 salve 2 atmega 8 and 3 atmega 328p, there is two device with analogue output connected to main controller atmega 2560 through ads1115 ...