Questions tagged [arduino-nano]

The Arduino Nano is a small board based on the ATmega328 or 168. It has male headers, so it can be plugged directly into a breadboard. It is small and compact, and features a USB chip.

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4answers
81 views

wake from powerDown to check sensor then put back to sleep

I am using an Arduino Pro Mini with various sensors. I am powering it with 2 3.7v 3400mA batteries which I recharge with a solar panel. I take a reading from the batteries and if the reading is ...
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1answer
38 views

Taking data from main 120V 50/60Hz power

How can I take data from my house main power and reconstruct it signal? I used an transformer and an inverter amplifier to low voltage to 5 volts and read it with A0 analog pin, but I got a very ...
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38 views

PIR Sensor Gives False High in 55 Minutes (Can't find a way to solve)

I have built a system to identify motions and fire alerts. System can send a SMS in case if it's identify such alerts. System consist of two parts, Part 1: Armed and Disarmed using a PIN (Using ...
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48 views

Nothing prints in the serial monitor in Arduino - Ide

Sir, I used Arduino-Uno as programmer and Arduino-Mega 2560 as target and uploaded the below code, I was not able to view the Serial. println lines in the serial monitor, Can you please help. Thanks. ...
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28 views

433 MHz Radio Transmitter and Reciever Range Problems [duplicate]

I recently started developing an interest in tinkering with my Arduino. I bought 433 MHz Transmitters and Recievers (model number: XY-MK-5V). But when I try using them I have pratically no range: ...
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18 views

Dobly prologic with esp8266?

So i have this old 5.1 prologic thing sony hcd-451. is it possible to encode an audio stream to prologic send it to the esp and digital out it to my device? Grabbing the audio stream encoding and ...
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23 views

Cannot connect with online arduino editor but I can with Arduino IDE to an Arduino Nano

As the title says I have a Nano with CH340G and 168 that connects properly to Arduino IDE but not to Arduino online editor, it does not detect the board "Error uploading, check if the board is ...
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0answers
32 views

Issue with TTP223 capacitive buttons

I got some TTP223 to be able to trigger some inputs from an Arduino Nano thru a plastic cover without drilling anything (and hiding the buttons was cool so no one knows that there is functionality ...
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50 views

Byte not written to the memory

In the following code I'm computing crc and setting it as last (11th) byte in the array. The problem is it's sent on I2C just when I print it on the serial terminal. static constexpr uint8_t ...
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119 views

Arduino-Controlled LED Matrix issues

I am making a 20 x 15 LED matrix, and am having some super annoying problems. I was hoping you all could help me find some answers. It is very important to note that I am following BitLuni's video ...
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2answers
74 views

Powering Peltier using solar panels

I am a beginner to electronics and trying to make a portable air conditioner using a Peltier cooling pad (12V). I am planning on using a solar panel to power the Peltier and looking forward to your ...
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1answer
54 views

Sending more than BUFFER_LENGTH(32) bytes in slave answer I2C

I need to send 259 bytes as answer to I2C master read request. AFAIK there is a buffer limit of 32 bytes in Wire.h and in HW (Arduino Nano). Is there a way sending 259 byte answer, or I have to choose ...
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2answers
43 views

Audio stops playing after rtc is connected

I am trying to play a song using arduino while at the same time display time using a rtc board using the tmrpcm library. However, if the rtc board is connected no sound is played. I do understand ...
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1answer
101 views

real-time reading of a quadrature encoder at full resolution with only one interrupt on ATmega328

I want to read a quadrature rotary encoders at full resolution with only one interrupt on Arduino Nano (ATmega328). So I found out that we can use XOR to reach a full resolution: Where pin 3 ...
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27 views

Communication between arduino nano and MCP3424 over I2c pt. 2

I'm am completing a project of mine that uses an MCP3424 i2c 18bit ADC and an arduino nano to measure temperature with an NTC thermistor but am having trouble with the arduino wire library. This is my ...
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1answer
58 views

How to modify this code to simulate a binary encoder?

I have come across the following SPI slave code at this site: #include <SPI.h> char buf [100]; volatile byte pos; volatile bool process_it; void setup (void) { Serial.begin (115200); // ...
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1answer
38 views

Control 4 digital outputs with one switch

I want to control 4 digital outputs (d0, d1, d2, d3) with one switch. When the Arduino starts, they should all be in state LOW. Now, after pressing the button once, d0 should get HIGH. Another push ...
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3answers
25 views

Help me get my robotic car to work?

So I recently followed a tutorial on youtube and I've assembled the car and connected all the wires. What I've done: Car Now in the video, when the guy connects all the wires, the wheels constantly ...
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1answer
21 views

Circuit with a tip120 works with a Led but, don't with a vibrator motor

I have 2 Arduino Nano's. One with RF transmitter and the other with an RF receiver of 433 MHz and both have two 3v vibration motors. I want one Arduino to send a string to the other Arduino to let him ...
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60 views

Why did it blow up?

I recently designed a PCB to hold an Arduino Nano, IMU and other components. I'm using this platform as the fly computer of a homemade drone. This is one of my first PCB designs and I'm not an expert, ...
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0answers
24 views

I get the following error when I typed the below code. “ Stray'\302” in the programme .I tried to sort it but failed

#include <Keypad.h> #include<LiquidCrystal.h> #include<EEPROM.h> LiquidCrystal liquid_crystal_display(9,8,7,6,5,4,); char password[4]; char initial_password[4],new_password[4]; ...
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1answer
548 views

difference between the nano and the nano every

So I wondered what the difference between the nano and the nano every is and why the nano every is so much cheaper than the nano. I'm new to the microcontroller business and I would like to know ...
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1answer
98 views

Connecting Peltier module to Arduino Nano

I am a beginner to Arduino programming and started working on my first Arduino project recently to power a Peltier cooling pad. Below is the code I used and in the circuit, I connected the positive (...
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41 views

First sprintf-call works, second (identical) does not

In my current project I'm using an Arduino Nano, an RTC-Module, SD-Module and an OLED-Display to log time-values. I'm currently trying to implement following function: char *onString = (char*)...
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1answer
109 views

Menus not changing when button is pressed TFT 128 x 128

I've just followed a tutorial so that when a button is pressed it goes through a menu. Click once, next slide. Only issue is it isn't appearing on my screen at all. It has uploaded but I'm a total ...
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1answer
103 views

How to make a custom character on a TFT LCD display? (128x128)

I'm currently using the ucglib library. I'm new to arduino and I'm wanting to simply display a lcd smiley I made with the byte generator. I still have some of the original 'font hello world' stuff ...
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1answer
419 views

Battery solution Nano 33 iOT

Since the Nano 33 boards are quite new right now, I haven't found any details on how to hook one up with batteries. I'm pretty daft when it comes to electronics (I'm a software man), and I read that ...
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2answers
40 views

Arduino Nano burns with ESP-01 in parallel

So I have an Arduino Nano powered in parallel with an ESP-01 (for the ESP there is an extra LM1117-5.0 voltage regulator in series). +12V ---------+---------+ | | ...
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0answers
105 views

ESP32 HCI command for setting BLE TX Power

Does anyone know if there's an HCI command for setting the TX and the advertising power for BLE on an ESP32? I have a Nano 33 IoT and a MKR 1010, and it has its power set annoyingly low for ...
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15 views

HM-10 doesn't respond to Arduino

I'm using Arduino Nano R3(old bootloader) and Serial(hardware serial). Arduino -> HM-10 5V -> 5V GND -> GND RX -> TX TX -> RX with (1k/2k voltage divider) Code is below #include <Arduino.h&...
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2answers
154 views

I2C - Confusion

It's not often I ask a question. This one has me a little stumped though. Scenario: I have an 328PB (internal 8mhz), it speaks to a multiplexer on Wire1 (the PB's second IC2 - Minicore lib). The ...
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2answers
26 views

Push Button to Drive Power to Servo

I am currently doing a project for a class which uses a few other components such as an LCD, a servo, and such. I want to use a button which acts as a circuit breaker on the Vin of the servo in which ...
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32 views

Strange cyclic errors in analogRead on Nano

I am trying to build an emergency shutdown of a gas valve based on the output of a smoke detector. It basically measures the voltage on the buzzer of the smoke detector, and if high enough, changes ...
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2answers
175 views

Weird sound when modulating the pulse width on Arduino

I'm trying to generate a pulse width modulated sound using Arduino Nano. But it generates the weird sound unlike my expectation. Here's my code: class Phasor { public: Phasor(const float ...
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0answers
48 views

Arduino IDE gives error a1 is not declared

#include <LiquidCrystal.h> LiquidCrystal lcd(A0,A1,A2,A3,A4,A5); in this code the error given by IDE is 'A1' was not declared in this scope. So whats the problem please help
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1answer
175 views

Need to know what USB cable to get for Arduino Nano-33-BLE-Sense [duplicate]

I have recently purchased an Arduino Nano-33-BLE-Sense with Headers and wrongly assumed that it would come with a USB cable with it. I was searching the online store for the cable but the only cable ...
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0answers
87 views

MPU9250 with Arduino Nano and Arduino Nano 33 BLE

I am trying to read sensor data from two MPU9250s with both one Arduino Nano and a Arduino Nano 33 BLE using SPI. As for the Arduino nano, I was successful to acquire the sensor data and output it in ...
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1answer
55 views

Arduino stops working when servo makes a few rotations

The sketch rotates servo back and forth with buttons. When I rotate servo MG 995/996R 2-4 times Arduino stops working. Its voltage step-down transformer switches from ~9V to ~3.7V which is not enough ...
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1answer
54 views

What is the difference between a Hall effect sensor and an inductive one? [closed]

From what I have read, when placed within a magnetic field, a current will flow in both sensors. My goal is to use this kind of sensors to guide a robot thanks to an existing automower loop wire, ...
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1answer
42 views

Blew my Arduino. Did I wire this correctly?

Hi, I am currently doing a project and it seems that I may have blown my Arduino Nano (or maybe not). The power LED of the Nano was still on and I believe the L pin blinks once every time I press the ...
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3answers
140 views

Interface a mobile phone's finger print scanner with arduino

Is it possible to salvage a fingerprint scanner from an old and dead smartphone and use it with Arduino? I am not talking about writing an android program and send data to Arduino over Bluetooth or ...
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3answers
59 views

How can I make my arduino start when a magnet is sensed, and stay running until the application determines it was to shut down

My thought was to use a magnetic reed switch to turn on the arduino. But how do I keep it running if the magnet is moved? The idea is that the application will determine when it is ok to shut off ...
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2answers
109 views

Using an Arduino Nano to program (as ISP) a standalone 328p

I uploaded the ArduinoISP sketch to an Arduino Nano to use it as a programmer for other chips. It worked successfully to program an ATtiny45, I did the usual wiring between them, and added a 10uF ...
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2answers
59 views

Turn on/off low current device (LED) with Arduino

I am just starting with Arduino and my first project consists in switching a LED light with Arduino. I know a relay must be use to control AC high voltage device (i.e. 240V), however, as my LED seems ...
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56 views

What kind of USB cable do I need for my Arduino NANO 33 BLE W/ HEADERS?

I have recently purchased an Arduino Nano from the main site, but it did not come with a USB cable for programming it. I have also checked out the Arduino site and there was no reference for what type ...
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34 views

Frequency Doesn't increase when Button Is Pressed

I’m trying to output a frequency that can be increased and decreased by using 2 buttons. I’m trying to first of all configure the first button (which increases the frequency). I’m trying to also add ...
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3answers
57 views

How can one reset Arduino Nano from NodeMCU?

If one connects the RESET pin on an Arduino Nano to a digital pin on a NodeMCU, will the NodeMCU be able to reset the Nano by setting said pin to LOW?
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2answers
50 views

Do comments occupy space in compiled C++ sketch? Arduino / NodeMCU

I tend to leave old code around as comments until I am sure that my current version is stable. Just the way I like working. I am concerned that I may be unnecessarily bloating up my sketches. Do ...
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0answers
34 views

memcpy is corrupting serial output even before call

I just want to memcpy some data into a buffer, but it completely destroys my serial output. Arduino Nano Arduino IDE || VS Code with Platform.io Here the relevant declarations: uint8_t picture[4170]...
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1answer
51 views

I2C communication problem with two slaves (atlas scientific) and one Nano (official)

I'm working on a project using an arduino Nano (official) and two peripherals from Atlas Scientific (pH and DO) communicating via i2c. Everthing works fine when i use a usb alimentation connected to ...