Questions tagged [arduino-uno]

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

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23 views

Can Phone read notifications and send them to an Arduino? [closed]

I am looking for some way to have my android phone detect, read, and send information about notifications my phone receives to my Arduino for a smartglass project I am working on via Bluetooth. I ...
2
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1answer
40 views

The arduino can't seem to output correctly

i am a beginner at python and I am average at Arduino and I had the idea of using both of them together for a project. I have been trying to make a Arduino + Python car which I can control with my ...
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1answer
35 views

Display not showing output - Arduino Wattmeter

I have been playing with this code for some time now, I am able to show the results in an 16X2 LCD display, but I am not able to do it in an OLED. here is the code #include <SPI.h> #...
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2answers
38 views

DC motor phototransistor control

So basically I have a circuit with a phototransistor, and want to convert the phototransistor value into a PWM signal that can control the speed of the motor. The code I came up with is below, however ...
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0answers
41 views

I'm building arduino radar. I need help with the servo [closed]

I'm building arduino radar. I need help with the servo. The servo doesn't move 180 degrees back ans forth. My project consist of the following: Smraza UnoR3, Breadboard (830 Tie-points), LCD Display (...
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1answer
49 views

Tinkercad but offline?

I have some issues with network and would like to work with arduino everywhere. I use Tinkercad which is great, but I would like to installit to my laptop and work without using WiFi. I couldn't find ...
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0answers
12 views

Arduino menu coding problem by Keypad and 128*64 graphic LCD

I am trying to modify on the menu code to be able to use a keypad shield and arduino for scrolling between lines. after uploading and trying the code the following has happened: 1- I can not scroll ...
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2answers
1k views

16Hertz Uno R3 Board vs Arduino Uno R3 Board

I bought a 16Hertz Uno R3 Board. When I installed the driver and the Arduino IDE, in the IDE`s menu I saw: Tools -> Board -> Arduino Uno was selected by default which is great, but... ...
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1answer
31 views

Error conecting raspberry with my arduino in a serial port [on hold]

Hi i am trying to make a comunication between theses device but when i am trying to run in my raspberry i have the follow error: Traceback (most recent call last): File "serial.py", line 1, in ...
4
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2answers
25k views

Capturing images from OV7670 (w/o FIFO) using Arduino Uno?

I want to capture images from my OV7670 (w/o FIFO) and send it to my PC via Wi-Fi (ESP8266) (which I know how to use) using an Arduino Uno. I have read so many blogs and threads on the internet but ...
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1answer
51 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), ...
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1answer
45 views

How to use while loop in arduino for infinte loop

I am doing code of esp while switching hotspot for connecting esp i am getting some problem . I am using this line of code: while ((!esp.find("WIFI ")) || (!esp.find("+CWJAP:3"))); but it is not ...
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0answers
205 views

Adding a kill switch for servos with states - blink without delay code

I have many LEDs and two servos connected to one Arduino Uno, and the servos are programmed to move randomly indefinitely. However, I would like to install a kill switch for the servos by reading a ...
0
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1answer
34 views

How to start a dendrometry dimension build (Dimensions of Trees) for research?

I am looking to build a device that can measure the dendrometry fluctuations of trees (etc). I essentially want to build this https://publiclab.org/notes/kinasmith/09-09-2016/dendrometers to a t but I ...
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1answer
113 views

Analog output gives a close range of values

I try to get a good range of values from VMA309 sound sensor. However, when I connect it properly it gives me a range of values +/-5 like below. The documentation says it should give numbers ...
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3answers
2k views

How do you control the amount of times the void loop loops per second?

int firstAnalogPin = 0; int secondAnalogPin = 5; int firstVal = 0; int secondVal = 0; void setup(){ Serial.begin(9600); // setup serial } void loop(){ firstVal = ...
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0answers
65 views

sending string from Arduino to ESP8266 works on UNO but not Pro Mini

I have a project where I am getting sensor data and sending it over to an ESP8266-01 to send to ThingSpeak. After some work I got it to work. So like I real smart person I decided to replace the ...
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1answer
36 views

One Led and 2 buttons [closed]

I need to switch on led with pushing button number 1 , and during 3 seconds it should stay on, and if I push button number 2 during this 3 seconds led should turn off. In other case after 3 seconds ...
1
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2answers
718 views

Dot Matrix Display with Arduino UNO (PROBLEM)

I faced a problem in my graduation project and I hope you can help me to solve it :) My project is connecting Arduino Uno to 16x32 Dot Matrix Display(DMD) and display messages on it from VB.net ...
0
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1answer
31 views

OLED shield for wemos d1 mini pro not staying on

I recently bought a wemos d1 mini pro to toy with wifi and bought a oled shield with it. I've been looking on youtube and github for software and I finally found the software and got it to load onto ...
0
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2answers
3k views

Esp8266 server unreachable. Port doesn't open

I have followed all the instructions provided on http://allaboutee.com/2015/01/20/esp8266-android-application-for-arduino-pin-control/ I have got the correct setup, I have got the message "Server ...
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1answer
29 views

How Programing the nodeMCU Through OTA using GPRS?

How Programming the nodeMCU Through OTA using GPRS? Hi Everyone I need big help. Actually, I m using NodemCU one of my project. the setup in Remote location, that place dont have a wifi option so I ...
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0answers
24 views

How to read voltage value from arduino to esp32

I am learning Arduino(uno)-ESP32 basics for a hobby project. In Arduino sketch, it's writing some random value(mimicking a sensor) to Arduino analog pin 9. const int analogInPin = A0; // NOT ...
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1answer
208 views

iBus transmission and read it in Arduino

I am using an Arduino Uno and I want to transmit data from FSi6 to FS-iA6B and read received data in an Arduino. After searching, I found the below link which is iBUStelemetry. iBustelemetry I am ...
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1answer
47 views

Help with Bluetooth shield

Hey guys I have this Bluetooth shield Does anybody know how I can get it to connect to Arduino? I can't find any guides on it. I have this serial program that I want to use to turn on a led. but ...
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2answers
55 views

Arduino simple resistors in series

Silly question but how would a circuit be set up with Arduino where two different resistors are in series but one has an unknown value (i.e. is just a piece of metal for example) and so how would we ...
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1answer
268 views

Error code board and boards.txt? Formatting error? cannot verify alarm.txt or any

Arduino: 1.8.8 (Windows 10), Board: "Arduino/Genuino Uno" Error reading file (E:\arduino\arduino-1.8.8\hardware\arduino\avr**\boards.txt:0**): Invalid line format, should be 'key=value' Error ...
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0answers
20 views

Arduino Stepper motor control programming problem

I want to control the speed and position of stepper motor by a 4*4 keypad and monochrome graphic lcd interfaced with arduino. some open sources gave me good hint points to start controlling the ...
0
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2answers
45 views

Compiled sketch vs text file size

OK,so this is my first program written via the Tinkercad utility. I have saved the program as a text file, and it equates to about 22K. My simple question is, when uploaded / compiled to the actual ...
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4answers
3k views

How to send sensor data from Arduino through NRF24L01 to Raspberry Pi

I am able to send text from the Arduino wirelessly to RPi. I am now trying to send the sensor data I'm measuring to the Pi. This is what I have below: int moisture = A0; int temp = 3; //Skipping ...
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1answer
21 views

Change From One State Machine To Another

I have a project where I need to state from leds turning on and off to another one that will have all the leds turned on and send data and I was wondering how should I do that, this the code I have: #...
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1answer
25 views

Sending sine wave from MATLAB and reading on Arduino Uno

I am working on timing issues associated with sampling data at high rates and storing it on an SD card (ADC delays, clock drifts and file I/O time). For this experiment, I thought of sending a ...
0
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1answer
18 views

Serial monitor shows repeated CIPSEND and CIPCLOSE

I'm trying to build a heart rate monitor using ESP-01. The code compiles and uploads well but once uploaded, in the serial monitor it shows the following. It keeps repeat CIPSEND and CIPCLOSE over and ...
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1answer
275 views

Want to display an image from SD card to ILI9486 LCD display

I am completely new to Arduino. I have been given a side project to display a image from SD card to display. LCD used is ILI9486 which has a SD card slot at the back of the display module. I have ...
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0answers
29 views

Is it possible to convert RCA(video only) to Arduino Uno then to a computer?

I have an old wireless RCA output camera. I was wondering if I can convert its analog input to a digital one and have it saved on a file in my laptop?
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1answer
35 views

SG90 servo motor not working

I tried to test a servo motor for a project using this simple circuit but the motor won't move. I've used this before with the same setup and code and it worked, but now suddenly nothing works, even ...
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1answer
26 views

Arduino UNO and TB67H303HG Ic driver: Wiring question

I would like to control the TB67H303HG (a full bridge driver IC for DC motor adopting MOS in output transistor) with my Arduino UNO. This is its datasheet. I was thinking to connect: PIN 3 INPUT to ...
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1answer
25 views

Please help me fix this error:expected unqualified-id before 'if'|Arduino [closed]

#define inA1 4 #define inA2 5 // 4,5 DC 1 #define inB1 6 #define inB2 7 // 6,7 DC 2 #define inC1 8 // Buzz #define inL1 2 #define inL2 12 #define inL3 3 #define inL4 13 // Den led byte bluetoothByte ...
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1answer
29 views

Maximum power rating for Arduino UNO revision 2 (SMD)

I have located the 5V voltage regulator chip on my Arduino board which I am hoping to use to power an attached device (which draws up to 500 mA at 5V). The chip is next to the plug for the external ...
0
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1answer
31 views

OLED DISPLAY USING SPI

My display is not responding to this code. Help please #include <SPI.h> #include <Wire.h> #include <Adafruit_GFX.h> #include <Adafruit_SSD1306.h> #define OLED_MOSI 10 #define ...
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1answer
33 views

Arduino timer to turn a serve at a certain time

i am working on a project for my school tech class. Our goal is to make a vehicle that will travel along a cable and drop an egg to a target while going down the cable. i am using an arduino to to ...
0
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1answer
30 views

Nodemcu does not connect to phone wifi

All welcome. I'm trying to connect nodemcu to the phone's wifi. And nodemcu can't do it. But sometimes after several reboots she does it. Also if i use my old phone - nodemcu connects perfectly! ...
0
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1answer
43 views

NRF24L01+ Getting Started Acknowledge Failed

I Have followed numerous guides and tutorials for getting the NRF24L01+ modules working with an Arduino Uno. I have swapped to a genuine Arduino and tried 4 different NRF modules. All without luck. I ...
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0answers
24 views

i2c callbacks occur in wrong order

I'm trying to implement a an SMBus slave and discovered that when the master sends a SMBus ReadByte command, the onRequest and onReceive occur in the wrong order on both a Uno and a Zero board. Some ...
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2answers
1k views

Problem with programming an ATtiny85: Error - avrdude: Yikes! Invalid device signature

I'm trying to program an Attiny85 chip using an Arduino Uno as an ISP following this two tutorials: Instructables: Program an ATtiny With Arduino and Programming an ATtiny w/ Arduino 1.6 (or 1.0) but ...
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1answer
129 views

Connecting Winsen ZE11-C2H4 Sensor to Arduino

How should I connect the ZE11 Ethylene Sensor to an Arduino Uno? I want to know how to attach the pins of the sensor to the Arduino and which resistor I should use. I'm very unprofessional at working ...
3
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1answer
307 views

Arduino keypad and RF 433MHz transmitter problem

So, the basic idea is that user presses a key on keypad, and key that is pressed is sent with RF transmitter. I got individual parts to work(keypad and transmitter), but can't send the actual key. ...
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1answer
148 views

Serial Monitor appears unreadable characters

Hello My serial monitor keep showing these unreadable characters. Anyone know what is going on? Many thanks!
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0answers
15 views

Connecting Adriono to Ubuntu Bluetooth HC-06 connection

I'm trying to connect a Bluetooth serial stream from a Teensy3.2 to an Ubuntu laptop. The USB comms between the Teensy and the laptop work fine and the BT comms between the Teensy and my phone work ...
0
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1answer
41 views

Arduino RS485 shield to RS485 temperature & humidity sensor

I’m try to get data from rs485 is not work please advise to me. 1. Try to connect PC usb485 to DY-MD02 is work. Send command “AUTO” or “READ” 2. Try to Arduino rs485 shield to DY-MD02 is not ...