The Arduino Uno is the most common of the Arduino boards. It is based on the ATmega328 microcontroller.
0
votes
1answer
9 views
Over voltage procection for Arduino
If an external voltage of 7 volts is applied to the external voltage input on the Arduino and the power from the USB port remains connected, is there a protective circuit that will protect the ...
0
votes
1answer
14 views
Possible Arduino Uno c++ compiler bug?
I recently gave the students in my Arduino-based programming class a project to write some simple unit tests and fix the bugs that they encountered as they did. The class in question mostly stores a ...
0
votes
0answers
4 views
EEPROM - Storing Static Data
I'm trying to store four items to EEPROM. I can do one item no problem, I just don't know how to make the jump to multiple items.
My code:
#include <EEPROM.h>
char sgrpID[31] = "acpilot's ...
0
votes
1answer
10 views
Mass Storage with Arduino Uno and LUFA
guys ! I want to implement the mass storage example from the LUFA Library to my Arduino Uno, but I do not know where to start. Has anybody done this successfully and could give me a few pieces of ...
0
votes
1answer
9 views
Delay function not working as intended
int j;
void setup()
{
for(j=2 ; j<=9 ; j++)
pinMode( j , OUTPUT );
digitalWrite( 2, HIGH );
}
void one()
{
digitalWrite( 3, HIGH );
digitalWrite( 4, HIGH );
}
void all_off()
{
for(j=3 ; j<9 ; ...
0
votes
0answers
10 views
ESP8266-01 Standalone programming via Arduino uno clone?
For the past 2 days i have been trying to upload sketches to my esp module by using as a middleman this arduino uno clone .My goal is to program the esp to work alone as a microcontroller using the ...
0
votes
1answer
19 views
Purpose of extra holes for pins or Arduino clone
I bought this Arduino clone recently and it has lot of extra holes for pins, but some of them I don't know what they do. There was no instruction manual that came with it. Here's a picture of it, I ...
0
votes
0answers
4 views
How do I solve error 516 : Broken Pipe with HC-05 and arduino?
I am doing an LED project from howtomechatronics.com . It is to control and LED by pressing the on and off buttons on an arduino bluetooth terminal app. I am using the app made by the ...
0
votes
1answer
20 views
Can you send binary data to arduino AtMega328p?
I was wondering if its possible to send binary data to an Atmega328p. I don't want to send Arduino code or C code just binary. Is it possible to programme the ATmega328p using binary and how?
0
votes
1answer
30 views
Led blinking in the loop in condition
so I will explain what I want to get.
I am reading temperature from DS18B20 and showing it on the LCD.
I have one LED o pin 3 which is blinking when there is a temp reading and screen update. I have ...
-1
votes
0answers
10 views
is it possible to burn bootloader to atmega328( not atmega328P) using arduino UNO board? IF yes how?
is it possible to burn bootloader to atmega328( not atmega328P) using arduino UNO board as ISP? IF yes how? i have already tried changing names in board.txt and avrdude.conf..didn't work. I am using ...
0
votes
1answer
22 views
Detect if multiple variables are the same?
I'm setting a series of variables with: uint32_t currentLedColor[9]
What I'd like to check is if certain ones of those are the same.
Basically want to say if currentLedColor[0] and ...
0
votes
2answers
24 views
Digital Pin State - Some 1, Some 0
I'm running a sketch that looks for inputs to digital pins 3, 4, 5, 6, and 7. The gist of the sketch is that it's a digitalRead() from 3-7 with a Serial.println() to the monitor. The odd thing is ...
0
votes
2answers
24 views
How to store a function in a constant?
I'm trying to do something to this affect:
const string first_color = strip.Color(0, 60, 0, 0);
With the intended outcome being that I could use first_color wherever I'd have used strip.Color(0, 60, ...
0
votes
2answers
53 views
Simple memory chip for Arduino?
My basic question is: What is a good alternative to EEPROM chips for external memory on the Arduino Unor R3?
I know that there are EEPROM chips when one would like an external memory chip. It, in ...
0
votes
1answer
28 views
problem in integrating the slave code in attiny 84
I tried the whole process by using two arduino unos.It worked perfectly.
Though when i tried to replace the slave uno with attiny 84 uC it showed following errors in compiling.
Arduino: 1.6.7 ...
-3
votes
0answers
13 views
What are the different unique ideas you can give to make a unique arduino uno? [on hold]
What all ideas you want to have in arduino uno board what all the needs you need in arduino uno board ?
0
votes
2answers
29 views
Using Blynk to control stepper motor is jerky
I am using Blynk to try and control a 28byj-48 stepper motor using the ULN2003 driver and an Arduino UNO from my iphone via USB withe the iOS Blynk App.
Without using Blynk, my stepper is smooth and ...
0
votes
1answer
18 views
Error on UNOr3--> avrdude: ser_open(): can't open device “/dev/ttyUSB0”: No such file or directory ioctl(“TIOCMGET”): Inappropriate ioctl for device
When I try to upload my program on the Arduino UNO chinese clone, It says -> avrdude: ser_open(): can't open device "/dev/ttyUSB0": No such file or directory
ioctl("TIOCMGET"): Inappropriate ioctl for ...
0
votes
1answer
23 views
Enabling keyboard feature on Arduino with CH340G
I've seen here that it is possible to enable keyboard feature on Arduino Uno so it can emulate a keyboard (send keystrokes to computer) like the Leonardo. They do it by updating ATmega16U2 firmware. ...
0
votes
1answer
18 views
Error saying an included library is not
The IDE tells me the included library isn't? I tried restarting the IDE and my computer but it doesn't work. The other libraries work fine it's only with Keyboard that it fails.
My code:
#include ...
0
votes
1answer
21 views
Getting RGB values from camera
I have a camera I'm planning on attaching to an arduino uno, that I want to take pictures and extract the average RGB value from each image.
This is the camera I have, but I've now realized that it ...
0
votes
1answer
28 views
How would I refactor this code, given how similar most of the lines are?
I have a set of buttons and a set of NeoPixel LEDs. There's lots of very similar constants (button1pin, button2pin, etc) so there's almost certainly a more efficient way of coding this.
Any ideas?
...
0
votes
1answer
15 views
How do I connect velostat to an arduino?
I have some velostat that I'd like to hook up to an Uno. At the risk of sounding dense...how do I do that?
Ultimately wanting to get readings of pressure from the velostat, just not sure how or what ...
0
votes
0answers
21 views
sending words in serial
I created a simple project to send commands from an android device to arduino via Bluetooth , using MIT App inventor ,
the issue is that when I send a word for example "BLUE"
in the serial it ...
-1
votes
0answers
34 views
Variable frequency RF Receiver and Transmitter
I'm looking to make gate controller duplicator, but the of the controls are different, one gate is 433mhz and another is 299mhz.
How i make a Variable frequency RF Receiver and Transmitter for ...
0
votes
1answer
13 views
Ethernet shield problem. The serial monitor for the webserver sketch shows that 'the server is at 0.0.0.0'. any suggestions how to debug it?
ethernet sheild problem. the serial monitor for the webserver sketch shows that 'the server is at 0.0.0.0'. any suggestions how to debug it?
-3
votes
0answers
15 views
Can't configure my Arduino Ethernet shield
I am stuck with the issue that I can't get to the server. The serial monitor shows:
server is at 0.0.0.0
I am using the Web Server example in Arduino but it is not responding. Can anyone help?
0
votes
0answers
49 views
How to calibrate a load cell?
I'm working with a load cell and HX711. There was no weight on the sensor but I kept getting strange values, I thought it was broken or something so I used my second load cell but the same thing ...
0
votes
1answer
12 views
Wifi101 ad-hoc network
I've reviewed the WiFi101 library but have found no way to make the 101 an ad-hoc network. Am I missing something? I'd like to be able to emulate the RedFly example:
...
0
votes
2answers
26 views
How to set float to variable with 7 digits after the decimal point in arduino?
Example:
float x = 3154681.124 / 100000; //x = 31.54;
I want x to be:
x = 31.5468112;
0
votes
1answer
58 views
My Arduino is unable to upload any program, nor is it resetting. Need help
Whenever my Arduino is connected to any Laptop, it keeps it's LED ON steadily. And, whenever I try to upload my program, the Arduino IDE says 'Problem uploading to board'.
I tried uploading programs ...
0
votes
0answers
14 views
How to use web data from GSM sim 900 to be used as input for Arduino?
I have GSM SIM 900 connected with Arduino UNO. I'm successfully able to use HTTP READ command to show any data from web on the serial monitor of Arduino. It is showing complete HTML from that URL on ...
0
votes
1answer
27 views
Multiplying Arrays
I have an issuing multiplying two one dimension arrays together. Each array is an unsigned long that is storing values of factorials. The last row is completely off. My code is below also with a ...
1
vote
1answer
31 views
TFT screen to change sketches
I have an Uno + WiFi 101 thermometer and I'd like to be able to take it places and easily change WiFi network SSIDs and passwords. Can I use a TFT screen to make these changes to a sktech or am I ...
0
votes
2answers
25 views
How do you extend the wires from the arduino board to both fsr sensors to be placed on both chairs (one for each)
I’m trying to figure out how to extend the wires for both force sensitive resistors so that it could be place on each chair, one sensor on one chair and the other sensor on the other chair
This is ...
0
votes
2answers
31 views
Bluetooth sending values from two joysticks
Is there any good way of sending values from two joysticks from arduino A to arduino B? I tried sending using if statements, so if the Y- or X-axis' value changed then it would send that, but the ...
0
votes
1answer
38 views
My Arduino UNO turns LED ON forever when I connect it to my Laptop
My Arduino UNO Board keeps the LED light turned on forever whenever I connect it to my PC. And, when I try to upload even a sample sketch, it says avrdude: stk500_recv(): programmer is not ...
0
votes
1answer
9 views
Power supply change change gps readings?
I was powering a GPS Sensor from the 3v3 pin of a raspberry pi and my reading for my GPS sensor had some strange symbols in the mix, but when i switched to the 3v3 on the arduino, my reading came back ...
0
votes
3answers
37 views
Send information (such as a string) over digital pins
I wan't to send information from my arduino digital pins to another arduino's digital pins like a string, or a char. Can I do this without something like Software Serial?
The reason I am asking is ...
0
votes
1answer
17 views
Six pin HC-06 Bluetooth module? Is this possible?
I'm doing this project which specifically states that I need an HC-06 Bluetooth module however the schematic clearly shows a six pin Bluetooth module labeled HC-06-JY-MCU however I was told by someone ...
0
votes
1answer
18 views
System Is not Functioning Error. Windows XP, Arduino Uno R3, C# Listen SerialPort
Can anyone help me with this issue.
We created an arduino project. We listen microswitch.
If switch click, Arduino send basic serial data.
And C# application read serial port.
This solution is ...
0
votes
0answers
10 views
How to establish MQTT communication with arduino using ESP8266 over softwareSerial?
I want to establish MQTT communication with MQTT server and Arduino. I tried so many Arduino libraries for ESP8266 but none of them are compatible with PubSubClient over software serial.I am using ...
0
votes
1answer
15 views
How to import data from SDcard on Arduino to the computer using Arduino serial/COM port?
I have Arduino UNO with Adaruit wifi shield. I store some data on the sd card successfully and now I need to import that data on to the computer.
I am sending some token, say "1", to the UART port of ...
0
votes
3answers
53 views
Code doesn't seem to work when trying to program 2 sensors
Can anyone help me with this issue
I'm trying to program two FSR sensors through typing this code but I've realized that one is working instead of two.
The logic behind the code is that if you were ...
0
votes
2answers
34 views
How do I pass an Int Array into void for a foreach loop?
I know its probably an odd question...but I found a workaround for a foreach loop in C. I have a whole bunch of int arrays that I would like to be able to pass into a void, which has that foreach loop ...
0
votes
1answer
33 views
IR sensor does not work well on carpets
I have facing a problem since long and cannot solve it. I built Arduino car and place 2 IR sensors shown in image, to check down distance to avoid falling from stairs. One is at back and other at ...
4
votes
2answers
68 views
Do I need 3 voltage dividers to control ESP8266
I am buying an ESP8266 and the plan is to control it serially from an Arduino. I am going to use a voltage divider(Using a voltage divider is temporary and I know the cons of using voltage dividers).
...
3
votes
1answer
21 views
Value of joystick reduces when I send it over serial
I've got two arduino cards and two bluetooth bluesmirfs. I am currently trying to read value from a joystick and send it over to the other arduino card and use that value to control my servo motor.
...
1
vote
1answer
57 views
I’m having a tough time trying to program 2 fsr sensors
Can anyone help me please?
I’m having a tough time trying to program 2 fsr sensors. The logic ...
