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The Arduino Uno is the most common of the Arduino boards. It is based on the ATmega328P microcontroller.

1 vote
2 answers
220 views

How to re-solder the resistor in order to reprogram the Atmega8U2

As I see here I need to reprogram the ATMEGA8u2: https://www.arduino.cc/en/Hacking/DFUProgramming8U2 I need to solder a 10k resistor into a specific place. In a previous attempt I did that and result …
Dimitrios Desyllas's user avatar
0 votes
1 answer
159 views

Arduino UNO reprogram the MEGA8u2 using external programmer

As they say in https://www.arduino.cc/en/Hacking/DFUProgramming8U2 you need to solder a 10k resistor in order to reprogram/reset the MEGA8u2 chip on Arduino UNO but sometimes you may lack the needed t …
Dimitrios Desyllas's user avatar
2 votes
2 answers
909 views

How to indicate an End of a stream on USB

I am making a Lora-USB passthrough device using arduino and somehow I want to indicate that a stream over some data has ended. So far I have done: void onLoRaReceive(int packetSize) { if (packetSi …
Dimitrios Desyllas's user avatar
0 votes
1 answer
219 views

Is Arduino's USB communication protocol the same as USB modems use?

An Arduino Uno uses for the default USB communication either an FTDI chip in early versions or a microcontroller that emulates/replicates the FTDI chip communication. Is this type of USB communication …
Dimitrios Desyllas's user avatar
3 votes
1 answer
250 views

Arduino Uno R1 I soldered resistor but I cannot DFU program atmega8u2

I have an Arduino R1 board (the very first one) and I managed to solder the resistor into Arduino's Atmega8u2 (I went to a specialist in order to do that). Then I reset atmega8u2 and by wiring the pin …
Dimitrios Desyllas's user avatar
1 vote
1 answer
631 views

Arduino Uno with Kubuntu 16.04: Unable to enumerate device

I try to connect my arduino uno R1 in order to program the atmega8u2 but I am not able to do so. When I run sudo dfu-programmer atmega8u2 erase I get the following results: dfu-programmer: no device …
Dimitrios Desyllas's user avatar
1 vote
Accepted

Arduino Uno R1 I soldered resistor but I cannot DFU program atmega8u2

According to https://gebloggendings.wordpress.com/category/elektronik/arduino/ it is sometimes not to assume that the atmega8u2 is always the correct value in my case was the at90usb82 resulting into …
Dimitrios Desyllas's user avatar
0 votes
1 answer
575 views

How I can populate a buffer from data read from SPI?

I have wired a Macronix MX35LF1GE4AB Flash memory into an arduino Uno using Logic Level Shifters. What I try to do with it is to dump its contents. In order to do so, I am implementing the following s …
Dimitrios Desyllas's user avatar
1 vote
Accepted

Arduino Uno with Kubuntu 16.04: Unable to enumerate device

You should solder the resistor (in case you do not have the skills I reccomend doing into a proffessional, a professional close to me managed to solder it with a cost about 5 euros) and then hardware …
Dimitrios Desyllas's user avatar
1 vote
1 answer
1k views

Sending data to Arduino Via Nodejs: Arduino does not echo back the data

I have the following sketch that runs in a arduino UNO: /* * Copyright 2018 Dimitrios Desyllas * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and …
Dimitrios Desyllas's user avatar
1 vote
1 answer
321 views

Flashing ATmega8U2 using another Arduino

I have an Anduino Uno R1 and the ATmega8U2 on. It does not respond correctly. How can I use another Arduino Uno R3 in order to reinstall the correct firmware? What I want to avoid it to solder the res …
Dimitrios Desyllas's user avatar