Questions tagged [arduino-uno]

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

Filter by
Sorted by
Tagged with
1
vote
0answers
27 views

If an Arduino goes to sleep, does the attached ESP also sleep?

I am using Arduino Uno + an attached ESP-01 (ESP8266). I want to save battery, so I made my Arduino get sleep & interrupt by a watchdog timer. But if the Arduino goes to sleep, does the attached ...
0
votes
1answer
40 views

Sampling rate of multiple analog pins on Arduino

as I checked on Arduino website, they mentioned all boards: UNO, Nano, Mini, Mega have maximum sample rate 10kHz for each analog pin. So my concern is: 1) is there any difference between sampling ...
1
vote
1answer
45 views

Arduino Communication with Sim 900

Im using an arduino uno and a sim 900, the simcard is setup and working as I can make a phone call to it and it rings. The sim 900 is powered via the power jack and the uno is currently powered using ...
0
votes
0answers
22 views

Connect UNO to WiFi using Huzzah ESP8266 without a Serial cable?

I bought a Huzzah ESP8266 to connect my Arduino Uno to WiFi, but now I'm realizing I didn't buy the cable that you need to connect the Huzzah ESP8266 to the computer...is there any way to program this ...
0
votes
0answers
25 views

MKR1000 disconnecting when hooked up to RGB 16x32 LED Matrix

This tutorial is from 2012, before the MKR1000 existed. The tutorial says the 16x32 LED Matrix panel is compatible with the Arduino Zero, which the MKR1000 is supposedly related to, so I'm thinking I ...
0
votes
1answer
39 views

Arduino digital pin status not transmitting via NRF24L01 where as analog pin status is getting transmitted ,Why?

I am currently working with a project using NRF24L01 which I integrated with my Joystick so that I can make it wireless.While transmitting the information in my Joystick to the receiver only analog ...
0
votes
0answers
31 views

AD8232 picking up monitor signal on UNO

I have a AD8232 ECG sensor hooked up to an Arduino Uno following the Sparkfun guide. I do get a good clean signal, but only if I am a good 3m+ from my monitor. Otherwise I pick up a strong 50Hz signal....
1
vote
2answers
100 views

How can I use a transistor to “press” a button?

I have a heater remote that I want to press the buttons of with my Arduino. I am powering both the remote and Arduino from an external 5V source so both grounds are connected. Currently I have tried ...
-1
votes
1answer
41 views

16/2 arduino I2C lcd display not lighting up?

I am working with an I2C lcd display with an arduino uno board I have connected the gnd pin to gnd of arduino uno and the vcc pin to 5V of arduino uno and the display is not even lighting up there is ...
1
vote
0answers
41 views

read with Arduino SSI encoder signal

I'm stuck in my project, I try to read an absolute encoders angular position with my Arduino. I used and cabled a differential line receiver and driver between Arduino and the encoder, like explained ...
0
votes
0answers
52 views

Post Data Server from Arduino using Fuzzy Logic

Can somebody help me , when i run this code separately , no problem was found , but when i fuse it together , only fuzzy work and the data can't be sent to my server, sorry for my bad english i ...
0
votes
0answers
30 views

error cannot convert string TO uint_8t

this is the code i am working on for controlling leds #include <WiFi.h> // esp32 library #include <IOXhop_FirebaseESP32.h> ...
0
votes
4answers
32 views

LED Matrix Display with dissimilar brightness

So far I have seen in LED matrix related projects that the brightness is controlled in an entirety manner. That means the brightness of total display can either be reduced or increased. How can we ...
1
vote
1answer
30 views

Error “avr-g++: error: CreateProcess: No such file or directory” When Compiling Script

Whenever I try to compile a script, the Arduino IDE throws the error avr-g++: error: CreateProcess: No such file or directory. I've already tried reinstalling the IDE, changing the board version in ...
0
votes
1answer
50 views

How to code 4 relays to go off in intervals and not in sequence? [closed]

Code : //FOR AEROPONIC SYSTEM WITH ROOM TEMPERATURE AND HUMIDITY SENSOR //AND 4 GROW CHAMBERS WITH DIFFERENT SPRAYING TIME // RELAY CONTROL #define RELAY1_PIN 2 #define RELAY2_PIN 3 #define ...
0
votes
0answers
79 views

Having problem in coding Arduino Uno

I'm making a timer program which takes the Time Duration as input from the user by two button switches (one for 'up' and one for 'down'), and after pressing an another button switch ('start'), the ...
0
votes
1answer
27 views

ESP 01 lost its firmware when it disconnected

Hi I am using Arduino uno & ESP-01 ESP-01 is working well when I put firmware to ESP, for example, wifi spreading or AT command is okay. but when I disconnect arduino from PC(disconnect USB ...
0
votes
0answers
87 views

Using the YS-IRTM with an Arduino Uno

Picked up a YS-IRTM IR Transmitter/Receiver module to do some testing for a project. There's not a lot of details on it but eventually came across two very important sources: Translated Module ...
0
votes
2answers
79 views

Garage Door Opener RFID failing after a period

I've been building an add on to my garage door opener that will allow it to be opened from the outside with a valid RFID token or from inside using push buttons. This works as expected when first ...
0
votes
1answer
40 views

From Strings to int problem

I create applications for a computer that is to be used to control the robot arm. I wanted to make the first attempt to run the application not on the motor, but on the diode and check if it will ...
-1
votes
1answer
52 views

Is it possible to connect Arduino to an instrument and import data from the instrument?

I purchased a coulomb meter recently. Basically, It is an instrument to measure static charge. The display is fixed and there is no way to take data from the instrument. So, I can't take continuous ...
0
votes
0answers
33 views

Capacitive Moisture sensor only shows values 1 and 2

I'm new to Arduino and electronics in general. I'm trying to connect the Capacitive moisture sensor v1.2 to my arduino and get values in the serial plotter. I connected the VCC to 5V, GRD to ground ...
0
votes
0answers
30 views

Trouble operating Servo and GPS at the same time

I have a problem using a servo and a GPS board at the same time on an Arduino Uno. For the servo, I use the following code: Servo myservo; // create servo object to control a servo // twelve servo ...
0
votes
0answers
29 views

Arduino - line follower car

I want to build a line follower car, but I dont have Infrared sensors, so want to run the car, without sensors as a test I have Motor Driver on top of Arduino UNO R3, all connections as expected, but ...
0
votes
1answer
48 views

A confusing condition statements [closed]

I am working on a project in making a timer socket using Arduino and a current sensor. For the code I decided to modify a code that was meant to be a kitchen timer. In that code I found a statement ...
0
votes
1answer
22 views

RDTSC alternative for Arduino

To calculate an operation execution time, I was saving the millis() result before and after the operation to calculate the interval time. Is there an alternative on the Arduino Uno like the RDTSC ...
1
vote
3answers
55 views

How to keep the regulator cool while battery powering the arduino and accessories?

I'm trying to build a battery operated hand lantern. It has the Arduino, an MPU6050 accelerometer, and 4 APA106 (WS2812B-like) LEDs. If everything's powered through the Arduino's 5V pins, that's 80mA ...
0
votes
0answers
12 views

What is the unit of the output from dmpGetLinearAccelInWorld()

#ifdef OUTPUT_READABLE_WORLDACCEL #ifdef OUTPUT_READABLE_WORLDACCEL // display initial world-frame acceleration, adjusted to remove gravity // and rotated based on known ...
0
votes
1answer
25 views

I'm using an Arduino and DS1307 for creating RTC but my code has some issue [closed]

I'm not getting any errors but the values that are supposed be displayed in the RTC_read are not being displayed for some reason.Initially i thought this was maybe due to the code being caught ...
0
votes
1answer
38 views

light detection system: Response different from power bank and computer system

Hello friends I'm working on a light detection system for the higher secondary summer term project, for which I'm using a simple Arduino board, Adafruit 16-Bit ADC, an LDR with some resisters, a 5V ...
0
votes
0answers
14 views

Problems with infrared call and response using IRremote library

I am assisting a local artist with animation and sequencing for a kinetic sculptures display. Basically, one sculpture will send a IR signal to the other and then that sculpture will perform some ...
0
votes
1answer
83 views

Logging data to SD card from software serial

I have an Arduino Uno and an Adafruit data logging shield and I have connected a digital pressure sensor that uses serial communication. The sensor requires a character to start transmitting data. I ...
0
votes
1answer
19 views

My HC-05 Bluetooth Module is not working

I have been trying to use the HC-05 Module with my Arduino Uno to control a LED, which can be turned on and off by my phone. Everything is fine when i input the values from the serial monitor. The ...
0
votes
0answers
15 views

Which Arduinos can support OTA firmware update?

I want to inquire about wireless sketch uploading to Arduino boards. Are there any reliable and easy modifications that would not risk permanent damage to the Arduino and preferably, be reversible? ...
1
vote
2answers
50 views

XBee using Serial rather than SoftwareSerial--how to fix

So I have a couple of XBee S2Cs, and I have configured them properly--they can in fact communicate with each other. I am using them with Arduino Unos and this shield: https://store.arduino.cc/usa/...
0
votes
0answers
18 views

problem sending data from hc05 arduino to processing?

I am trying to send simple string values from my arduino to processing via bleutooth using the hc05 module. I already paired the hc05 with my computer and got its port name as shown in the image below:...
1
vote
2answers
36 views

Current consumption of a buzzer

I want to use the buzzer KPEG2000 in my Arduino application. I would like to know if a GPIO can directly drive this buzzer, without destroy the uC (a GPIO can deliver 40 mA max). In the datasheet, we ...
0
votes
0answers
37 views

Unable to control servo with decoupling capacitor and external power supply, but motor shield works

I'm a hobbyist trying to up my arduino and electronics knowledge. I can successfully control a hobby servo using an motor driver shield (https://learn.adafruit.com/adafruit-motor-shield/overview) but ...
0
votes
0answers
24 views

UV sensor help!

I am creating a uv sensor. The sensor detects a certain amount of UV light and turns on the respective light (eg uv of 1-3 turns on a blue light). However I am getting an error: "expected primary-...
0
votes
1answer
32 views

Arduino UNO - Fluctuation of inputs and outputs

I have some pots (100K) on my Arduino board. When I raise the value of one those resistance other pots are being changed (Not too much but it's significant). I have no idea what's going on. I tried to ...
0
votes
0answers
20 views

Fingerprint sensor Arduino IDE code errors (Arduino Uno)

This code is for a fingerprint sensor. I keep getting the "function definition is not allowed before '{' token" error on the Arduino IDE. Any further corrections would also be immensely appreciated. #...
-1
votes
2answers
41 views

Make a set LED dimming schedule?

I'm trying to made the LED's go from minimum brightness to maximum brightness and back to minimum in 2.55 seconds. I really don't know where to begin. I have the following basic code for making it ...
0
votes
1answer
32 views

What are the better options to the basic Arduino Serial Plotter?

Arduino Serial Plotter does not allow analysis or saving of data. What are the best serial data graphing software (preferably free, but i don't mind if it's paid as long as it's better than the bare-...
0
votes
1answer
42 views

Why map Arduino pins 2 and 3 to Rx and Tx instead of using the build in Rx and Tx pins?

In many examples I see the following: #include <SoftwareSerial.h> const byte rxPin = 2; const byte txPin = 3; // set up a new serial object SoftwareSerial mySerial (rxPin, txPin); what is ...
0
votes
0answers
33 views

Arduino with external Wi-Fi antenna?

I need to create a project where I need to send data via Wi-Fi using an Arduino. I need the Arduino to have a U.FL connector to place an external Wi-Fi antenna (I can't use the MKR1000 with ...
0
votes
1answer
23 views

Will Funduino Joystick Shield work on a Mega?

I am trying to get a Funduino Joystick Shield working with an Arduino Mega and I need to use the WiFi capability. The specs I have found for the Funduino (see https://protosupplies.com/product/...
0
votes
0answers
27 views

PWM voltage appears to be low (~0.33V) and fails to trigger a PWM dimmer LED controller

I am attempting to use the Arduino Uno to tune the current on a SparkFun Femtobuck LED driver. The driver itself appears to work fine and outputs 0.33A when the PWM pins are not connected. However, ...
0
votes
0answers
17 views

I need to connect Arduino uno with esp-01 and relay control via Android application

I have trouble connecting to esp8266-01 through arduino uno and controlling relay via Android application or a local web server. I did a lot of research. I do not want to use esp-01 independently. ...
0
votes
1answer
27 views

How to read a specific amount of data via serial?

I'm trying to send data via serial from my Arduino nano to my ESP. Its an integer from 1 to 4 digits so something like 0, 13, 1234, 123, ... Every thing works fine but when the data comes too fast it ...
0
votes
1answer
21 views

analogRead Function AC Voltage Reading Capabilities

Usually when you sense AC voltage, you get a sinusoidal waveform. However, for AC voltage sources, Arduino analogRead ( ) only presents positive voltage values. So what's basically happening? Is it ...