Questions tagged [bootloader]

Refers to the code burned on the Arduino flash memory that runs every time the board is powered up. It starts the execution of user-loaded programs and allows uploading sketches from a PC through the USB connection. This tag should be used for questions about modifying, changing, uploading the default bootloader.

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12
votes
1answer
3k views

What happens when code is uploaded using the bootloader?

When I upload a new sketch to my Arduino Uno using the Optiboot bootloader, what really happens? What is sent to the Arduino? How does it respond? What does "not in sync mean"? What is "in sync" ...
14
votes
2answers
26k views

How do I burn the bootloader?

I was instructed to "burn the bootloader" to my Arduino to fix an error I was getting. How can I do this? (And what exactly is the bootloader?)
7
votes
1answer
12k views

Arduino Nano ATmega328P bootloader difference

There are two ATmega328P bootloaders, old and current. What is the difference between these bootloaders? I'm aware that Nanos sold by Arduino use the new bootloaders but I haven't been able to find ...
11
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2answers
22k views

Arduino Mega timeout communication with programmer error

I have an Arduino Mega 2560 and it was working fine until about lunch time when I started getting this error: avrdude: stk500v2_ReceiveMessage(): timeout avrdude: stk500v2_getsync(): timeout ...
0
votes
1answer
745 views

Avrdude verification error

I use an Arduino UNO with IDE 1.8.5 and for the last few days it doesn't let me upload any code. When I try, it pops up with the following error: avrdude: verification error, first mismatch at byte ...
2
votes
2answers
5k views

How do I write an Arduino program to an AVR chip without the Arduino bootloader?

Is it possible to write an Arduino program to an AVR chip that does not have teh Arduino bootloader installed? What is the process to do so?
2
votes
4answers
4k views

How to remove Adafruit Pro Trinket bootloader flashing startup sequence

From what I understand, the Pro Trinket has "Optiboot" which allows it to detect which boot loader you are trying to use, one for USB and one for FTDI. When it's in this "bootloader state" the red LED ...
1
vote
2answers
4k views

What is the proper way to turn an Arduino UNO into an ISP?

I have a bricked Arduino Uno and I want to try to flash the bootloader. I'm trying to figure out how to do it. On this tutorial from SparkFun you can see this diagram: They also show this table of ...
0
votes
2answers
165 views

How do I replace a burnt atmega328 with a new atmega328(bootloaded) in arduino?

I have an arduino UNO with atmega 328 whose microcontroller got burnt. I bought a new atmega328. I have another working arduino with atmega8. I followed the instructions in http://arduino.cc/en/...
0
votes
1answer
89 views

Usbasp Arduino Uno Bootloader Flash Error - Win 10

I'm trying to flash an Arduino Uno using usbasp but i'm getting the following error,I have checked all the connection and voltage using multimeter but still this error: Arduino: 1.8.8 (Windows 10), ...
9
votes
3answers
833 views

Programming many Arduinos simultaneously with a wireless broadcast

I will have many microcontroller-based devices which will be independent from each other, but all will run the same program. I would like to upload a program to all of them at the same time with a ...
6
votes
3answers
1k views

Is it possible to create a standalone exe which can burn the code into a Teensy 3.1?

So here's the scenario. I have sent my teensy 3.1 circuit to a client of mine And now I need to update the code burned onto teensy without providing client access to the code So is it possible to ...
3
votes
3answers
3k views

burn arduino bootloader and compiled sketch at same time

How can I write the bootloader and sketch code to an Arduino through the ISP and then write the sketch code again using the Arduino IDE later? Currently, I can write the bootloader through the ISP ...
3
votes
2answers
3k views

ino.hex vs ino.with_bootloader.hex

I'm working on a Android App able to update the content of my Arduinos. Start to work (reset the Arduino, communicate with STK500 protocol, get id of ATmega and so on). But I face a question about the ...
2
votes
1answer
160 views

What does the bootloader do?

As far as I understand it checks for a valid serial connection (new program incoming) and then either writes it to flash or starts executing the existing program. Can't the 32u4 or EDBG fill the role ...
2
votes
1answer
5k views

Upload a .hex file, using a standalone ISP, without overwriting bootloader

Is it possible to flash a .hex file on an AVR MCU, which already contains the Arduino bootloader, using an AVRISP mkII, without overwriting the bootloader? In my concrete situation, I have an Arduino ...
1
vote
2answers
1k views

Use command line to upload program through hex file to Teensy-LC

I want to make a standalone programmer for Teensy-LC in windows 8.1. So basically I have provided the board to a client of mine and now I want to change the program loaded into the Teensy-LC board. ...
0
votes
1answer
38 views

No Data Received on Serial Port & Unable to DFU Reset. Advice?

Having a problem running my original code that I tested last week, which worked on multiple days last week. I tried to do a DFU reset and update the BootLoader, but it didn't work. I checked the ...
5
votes
2answers
2k views

Why bootloader sizes differs from 0.5 to 8 kilo bytes for different boards?

According to official web info bootloader sizes are 0.5, 2 and 8 kilo bytes for UNO, Pro mini and ATMega2560. I believe all three boot loaders do similar job of receiving serial link data and write to ...
2
votes
1answer
187 views

Will the Uno bootloader work in the Duemilanove?

I had an old duemilanove lying around (Which was not working because i accidentially busted the atmega) and I recently bought some atmegas pre-flashed with the UNO bootloader. So I tried to put one of ...
1
vote
0answers
105 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
vote
5answers
3k views

Mega 2560 Doesn't Respond

When trying to upload to my Mega r2, it simply times out during uploading. avrdude: stk500v2_ReceiveMessage(): timeout avrdude: stk500v2_getsync(): timeout communicating with programmer I tried ...
1
vote
1answer
3k views

How does avrdude burn a bootloader much quicker than the Arduino IDE?

To burn a bootloader to the Arduino Micro (ATMega32u4), I'm using an Arduino Uno with the ArduinoISP program uploaded to it. 1st case: Arduino IDE Very straightforward, using the ArduinoISP sketch ...
1
vote
1answer
5k views

How to reduce serial speed on Arduino bootloader (optiboot) and on the IDE?

I'm debugging a couple of RS232-to-TTL converter boards that I'm trying to use to program my Arduinos and one thing I would like to try would be to reduce the upload serial speed from 115200 to 19200. ...
1
vote
1answer
3k views

NodeMCU does not boot up when GPIO pin is high

I have a NodeMCU board connected to a door and there is a micro switch that makes one GPIO pin (GPIO15 - D8 in this specific case) go high when the door opens. My problem is if I lose power while the ...
1
vote
1answer
67 views

Can the Arduino (Nano) bootloader be updated via itself and the Arduino IDE or is an ISP required?

I ran into the following error with a recent Arduino IDE version (1.8.9) when trying to upload to an "Arduino Nano" clone (ATmega328P): avrdude: stk500_recv(): programmer is not responding avrdude: ...
0
votes
0answers
604 views

Unable to reset arduino with RESET pin

I am using a custom built arduino UNO for some personal projects. I am using a custom optiboot bootloader given by Nick in this post. This was done to prevent the three LED flashes on digital pin 13. ...
0
votes
2answers
1k views

how can i fix the error ? stk500v2_getsync(): timeout communicating with programmer

I bought this Chinese Arduino Mega 2560 16AU. This was the first time to deal with Arduino boards. When I try to upload a sketch I always get this error: stk500v2_getsync(): timeout communicating ...
0
votes
1answer
36 views

Problem with Arduuino to breadboard Mega8

I am trying to make an arduino using mega8 mcu. After so much struggling with sync/response/signature problems and reading the previous questions, finally managed to do it (almost). However I still ...
0
votes
1answer
72 views

using esp8266 feather to burn bootloader on redboard

Is it possible to burn the bootloader of an arduino redboard using an esp8266 feather? whenever i connect my redboard to my pc the ports list on the ide would just be greyed out. I've looked around ...
0
votes
1answer
2k views

Burning Arduino Leonardo Bootloader to ATmega32U4 with 8MHz internal clock

Burning question: So, I'm trying to burn the Arduino Leo bootloader onto a ATmega32U4 that's on 3.3V and the internal 8MHz clock. Do I have to modify and rebuild the bootloader to set the fuses ...