All Questions
Tagged with arduino-uno atmega328
160 questions
7
votes
2
answers
3k
views
Finite loop runs infinitely
To gain better understanding of both Rust and Arduino (Uno), I'm trying to write direct hardware code for Arduino in Rust. Here's a very simple LED blink example, that I've tried to write.
I've made ...
- 213
2
votes
1
answer
639
views
Emulating Arduino Uno with QEMU: interrupts do not work
So I wrote this code for Arduino Uno:
// file qemu.ino
void setup() {
Serial.begin(9600);
}
void loop() {
Serial.println(millis());
}
And then compiled and uploaded it to the real ...
- 21
3
votes
1
answer
366
views
I can't upload my sketch to Arduino Uno using avrdude
I have already spent a couple of days by trying to upload a sketch onto my Arduino Uno R3 board and now it's time to give up, so I'm trying to ask some more experienced developers.
My hardware and ...
0
votes
1
answer
264
views
ATmega328 drop-in replacement with more flash memory
Is there a ATmega328 drop-in replacement with more flash memory?
Needs to be 28 pin DIL to fit the socket.
Alternatively, is there a board that has the exact dimensions and pins as an Arduino UNO, but ...
- 121
1
vote
2
answers
352
views
interface pcf7991at to arduino
I wanted to try to interface the pcf7991at with arduino, I assembled the pcb containing the pcf7991at following the diagram shown in the datasheet.
I saw that a frequency of 125khz must go on the CLK ...
1
vote
1
answer
995
views
Problem with using PubSubClient, the "callback" function doesn't seem to work correctly
I have a program that communicate between a esp8266 and a atmega328 using Serial, the esp8266 will connect to a MQTT server running on local network, and publish/subscribe to some topics. In the ...
- 11
3
votes
1
answer
354
views
The gateway is not working in Arduino EthernetENC
I am using ENC28J60 and EthernetENC library to connect an Arduino UNO with ATmega328 to the network. Everything works fine within the local network, but outside of it, I cannot ping the device. What ...
0
votes
1
answer
145
views
ATTiny88 missing pulses - maybe
I have been given to understand the ATTiny88 is very similar to the Arduino Uno / ATMega328 MCU. There does not seem to be a tag for the ATTiny88, so that is why I chose the tags I did. I do not ...
0
votes
1
answer
937
views
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 ...
- 183
0
votes
2
answers
1k
views
SoftwareSerial will not read all of the printed string when calling readString()
I have an Arduino UNO and an ESP32 that need to communicate to each other using SoftwareSerial. The problem I am coming across is that when I call readString and print it out using Serial, it will not ...
2
votes
1
answer
182
views
Curious Collision between OneWire and RadioHead
The code below runs on an Arduino Pro Mini (8MHz 328p) sending temperature readings using an inexpensive ASK transmitter. I use OneWire to read the DS18B20s, and RadioHead to manage the radio.
The ...
- 135
0
votes
1
answer
114
views
Problem with character concatenation algorithm in matrix led
good afternoon, I am making a 7x10 led matrix in which I use a CD4017 to handle the 7 rows and 2 cascaded shift registers to handle the 10 columns.
I first tried a programming to turn on my entire led ...
- 105
0
votes
0
answers
59
views
How does C2 work on the ATMega328P?
What is the purpose of C2 on this schematic below?
How does it work when the microcontroller is being programmed?
- 111
0
votes
2
answers
2k
views
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 ...
- 111
1
vote
1
answer
253
views
Help with Arduino sleep and watchdog timer interrupt
I want to use Arduino's sleep and wakeup functionality but have hit a roadblock and can't seem to get past it. As I am just prototyping for a final system, I cannot use the LowPower library to ...
- 11