Arduino Uno Puns

I am developing C code in Platform.io for this board, using the on-board boot loader for reprogramming flash.

I cannot tell what frequency the system clock is running at. I have USART0 configured as asynchronous, double speed, and UBBR = 207U because I am trying to reach 9600 baud rate to send messages to a serial terminal on host pc side (and the messages are legible so i assume that means that the system clock must be 16 MHz, according to datasheet). However, I also have timer1 configured as PWM to toggle OC1A pin with Top value set to 10,000 and no prescaler value (prescale = 1). When I measure the width of the signal between each toggle, i get 1248 microseconds. This means the timer1 clock is 8 MHz with no prescale.

Can someone explain this discrepancy? Is there some prescale of 2 occurring somewhere to timer1?

EDIT:
With some help, I got this resolution: https://forum.arduino.cc/t/read-fuse-bits-via-arduino-software/20724/9 Basically, uploaded a sketch using Arduino IDE which serially prints the fuse bit values (not how I wanted to resolve this but it works). Low fuse bits are 0xFF so no clock division enabled and its set to Low Power Crystal Oscillator which has to be the 16 MHz external crystal on the board. This confirms my UART settings but idk wtf is going on in my timer1 so will try to debug that...

What is the best sim card and module to enable texting? Price and coverage are important. This is in the United States so 2G doesn't sound like a good idea. I've been researching and can't find a good answer.

This is for a remote alarm system that won't be connected to wifi. May be in remote areas so the best coverage is best.

I’m using some stepper motors I got with the Elegoo starter kit (28BYJ-48 I believe). They are getting very low torque through the 5v power from the arduino, so I’m trying to use a wall 5v power supply, but can’t figure out how to connect it to the motors power. Are there any new parts I have to use for this? Power supply im looking at

Hi,

So it might not be the right sub.

I am trying to use my UNO as an UART ttl to usb to flash some custom firmware (tasmota) onto a Sonoff Dual R3. But no matter what i do it seems to just give me errors.

 

Not even sure how to provide any proper logs or anything, as i am not really getting any.

I connected reset to gnd.

Tx to tx and rx to rx

3.3v to 3.3v and gnd to gnd.

But i wont read any data!

Tried through Arduino IDE, ESPTool, Tasmotizer, but no luck.

Am i doing something wrong? Is this not possible to do with an arduino?

I'm basically printing a byte I'm getting from a hardware chip using the following function:

void onClock()
{
 CLOCK_STATE = !CLOCK_STATE;
 digitalWrite(CLOCK_OUT, CLOCK_STATE);
 char out[30];
 int read = 0;
 for (int i = 0; i < 8; i++) {
  Serial.print((int)digitalRead(DATA_START + i));
  (read <<= 1) += digitalRead(i);
 }
 printf(out, "    %x %d %c", read, read, digitalRead(READ_WRITE) ? 'R' : 'W');
 Serial.write(out);
 Serial.println();
 delay(10);
}

I expect to receive 8 bits as 0s and 1s, then the same number represented in hex, then again in decimal, and finally either an R or a W for read/write, but I'm getting results like this:
00000111⸮⸮˳⸮=⸮⸮⸮%⸮⸮⸮⸮⸮y⸮⸮⸮⸮0⸮⸮;-}[w⸮1.
can anyone figure out whats going wrong?

So firstly I would like to know if it is possible And secondly how would I get the 5 potentiometers to talk to my flight Sim through the board Thanks in advance

Hi, today I got my Arduino Uno

I have connected it to my PC, but in device manager it gets recognised as "Serial USB-Device (COM3)" instead of "Arduino Uno", yet when I open the IDE, I am able to select the port "Arduino Uno COM3" (https://imgur.com/a/hmE1ViC)

If I try to upload the Blink code from the examples, I get this error, which is the same if I don't have the arduino plugged in as well.

open NUL: The system cannot find the file specified.

Error compiling for board Arduino Uno.

The arduino itself has the LED at L blinking and an LED at "On" turned on and my computers does the typical sound whenever I plug/unplug the Arduino from my computer.

I have installed the CH34 driver as well, but the problem persists. Any help would be appreciated

Hello - I am an older engineer trying to learn new tricks and have decided to go outside my comfort zone exploring building my own Arduino capable boards following the directions from this website (https://easyelectronicsproject.com/arduino/atmega328p-pcb/) and this video

https://youtu.be/UC_krQh5q5Y

I also acquired some PCB boards from PCBWay using the Gerber files provided by the site. I have soldered everything together with all the components and used an ATmega328 with Arduino Optiboot (Uno) from Sparkfun. Everything seems to look good until it came time to upload a simple "Blink" script from the Arduino IDE examples library. Then I got the dreaded AVRDUDE error. I tried contact the website owner - but no reply

I am running on a MacBook with macOS Catalina (10.15.7) and the latest Arduino IDE. I am also FTDI3.3V 5V FT232RL USB to TTL Serial Converter Adapter Module for Arduino to connect (see image below)

Any suggestions on how to troubleshoot and find out why I am getting this error - "avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x00".

I suspect maybe the cable lacks data transfer so I ordered some new ones (which I needed anyways)

If anyone has a better suggestion on how to make your own board with the 320P chip - I welcome it!

Thanks!!

Verbose Output from Blink Script:

============================

avrdude: Version 6.3-20190619

Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/

Copyright (c) 2007-2014 Joerg Wunsch

System wide configuration file is "/Applications/Arduino.app/Contents/Java/hardware/tools/avr/etc/avrdude.conf"

User configuration file is "/Users/richardmeagher/.avrduderc"

User configuration file does not exist or is not a regular file, skipping

Using Port : /dev/cu.usbserial-A50285BI

Using Programmer : arduino

Overriding Baud Rate : 115200

avrdude: stk500_recv(): programmer is not responding

avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x00

avrdude: stk500_recv(): programmer is not responding

avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x00

avrdude: stk500_recv(): programmer is not responding

avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0x00

avrdude: stk500_recv(): programmer is not responding

avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0x00

avr

https://imgur.com/a/IOeRgoc

this is the picture of the hardware

___________________________________________

Hello everyone, i have a beginner problem

this switch is taking its timing from a clock input (A0)

each time there is a clock signal , the arduino gives 25 pulses and the switch goes to the next position (WORKS)

now ,also there are other conditions , such as a direction input . when active and the clock gets triggered the motor rotates in the opposite direction (WORKS INTERMITTENTLY)

more complicated functions are that instead of 25 pulses to the stepper driver , you can select an option where 50 pulses move the stepper motor 2 positions instead with the next clock.........

if i get these building blocks right , i think i can finish it myself.

this is what i have so far.....

any help is appreciated:

Regards and happy holidays to all.

_____________________________________________________

//C++ Code

//

int counter;

int counter2;

int memory;

void setup ()

{

pinMode (A0, INPUT); // Clock (Momentary Signal)

pinMode (A1, INPUT); // Direction ( Latching Button)

pinMode (2, INPUT); // +2 Once ( Momentary Button)

pinMode (3, INPUT); // +4 Once ( Momentary Button)

pinMode (4, INPUT); // +8 Once ( Momentary Button)

pinMode (5, INPUT); // +16 Once ( Momentary Button)

pinMode (6, INPUT); // +2 Always (Latching Button)

pinMode (7, INPUT); // +4 Always (Latching Button)

pinMode (8, INPUT); // +8 Always (Latching Button)

pinMode (9, INPUT); // Reset ( Momentary Button)

pinMode (13, INPUT); // Reset Sensor (Momentary Signal from IR Sensor)

pinMode (10 , OUTPUT); // Direction

pinMode (11 , OUTPUT); // Steps

pinMode (12 , OUTPUT); // Voltage Enable

}

void loop ()

//________________________________________________________________________________________

// 1 Step

{

if (digitalRead(A0) == HIGH)

{

for (counter = 0; counter < 25 ; ++counter)

{

digitalWrite (11, HIGH);

delay (2);

digitalWrite (11, LOW);

delay (2);

}

while (digitalRead (A0) == HIGH)

{

}

}

else if (digitalRead (A1) == HIGH && digitalRead (A0) == HIGH )

{

for (counter = 0; counter < 25 ; ++counter)

{

digitalWrite (10, HIGH);

digitalWrite (11, HIGH);

I have Xbox series x controller (in most cases it works same as Xbox one controller) and want to connect it directly to my arduino uno board. I can get my hands on HC05 or HC06 (don't know which one I need yet). I also did some research. Xbox 360 controller won't work because it uses radio signal instead of Bluetooth. That's not the case for newer controllers. Theoretically it should be possible for arduino to get inputs directly from controller. The question is, how?

Will any arduino uno r3 board with usb host shield work, oh they are other specific things to look out for. Thanks for your feedback