The Arduino Uno is the most common of the Arduino boards. It is based on the ATmega328 microcontroller.

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Programming arduino using esp8266

So , I try to make a wifi-serial bridge (at least that's what I hope I want) by following this tutorial : http://domoticx.com/esp8266-wifi-esp-link-firmware/ . And I have an WeMos D1 R2 based on the ...
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Why adding a LED between Pin 3 and Ground causes LCD display not to show text?

For a project of mine I am programming an Arduino UNO to show information I get from some sensors on an LCD display. As a first step I setup Arduino to show "Hello, world!" on the LCD, which worked. ...
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How can I make this using arduino?

https://youtu.be/SYrulKuKmVQ I need help in programing to make the above mentioned project on arduino.
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Stacking two Arduino UNO — possible?

I'm new to the whole Arduino thing and just getting started. Here's a question: Is it possible to stack two UNOs (requires resoldering of the pins of one of them, of course) without running into minor ...
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SIM800L failed to communicate with Arduino Uno R3

Module is SIM800L. Power supply is 3.7v using a step down buck converter. I have connected SIM's TX to Arduino's D8 - Arduino receives on D8, SIM's RX to Arduino's D7 - Arduino sends through D7. There ...
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Encoder IC HT640

Where can I find encoded address of encoder IC HT640? Can anyone tell me?
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How can i provide enough power on an UNO to use the HC-12 wireless module?

Scenario: The Uno is being powered by USB for programming, and the HC-12 wireless communications module is wired correctly. But it will not work. In reading through the web literature, it is ...
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How can I make this button toggle the position of a servo?

I am trying to make something so when I press the button it sets the position of the servo to 50 and then when I press it again, it sets it to 150. The button is momentary not a toggle switch. This ...
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Bluetooth module able to transmit but not receive?

I am currently building a remote-controlled robot (BB-8), and I'm testing out the HC-05 (FC-114) Bluetooth module by trying to turn on and off an LED remotely, using a clone Arduino Uno. My Android, ...
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Arduino GSM Shield + Plotly

OK so I am very new with the Arduino GSM shield on an Arduino Uno and it took me most of the afternoon to just send a text so feeling brave I then decided to try to send data to plotly. There are lots ...
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Arduino to ESP8266 (SoftwareSerial) communication, does not receive full data

I have an Arduino Uno and an ESP8266, connected over serial through ESP8266 pin GPIO_2 (which is set as RX over espsoftwareserial) and 11 on Uno (which is set as TX over SoftwareSerial). I am trying ...
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stepper motor is not working according to code

#include <Stepper.h> #define STEPS_PER_MOTOR_REVOLUTION 32 #define STEPS_PER_OUTPUT_REVOLUTION 32 * 480 //2048 Stepper small_stepper(STEPS_PER_MOTOR_REVOLUTION, 8, 10, 9, 11); int ...
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23 views

5V power supply negative terminal connection

I am currently developing some basic led board using Arduino Uno R3. Basically, the LEDs are connected in parallel so that 5V DC supply can light up about 3 LED. Each LED has its resistor and its ...
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2answers
47 views

ISR and multiplexing- time required to execute the code in Arduino

Below is an Arduino sketch for a basic animation, taken from the book Beginning Arduino by Michael McRoberts. Also, the connections have been shown. From what I have read elsewhere, this is the ...
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PWM doesn't work with my sketch

I have a weird problem. again. This time its the PWM. I have used PWM before and I used to work the way I am doing it now. But now it just wont work. The Fading sketch from example works. When I ...

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