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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Resonator vs crystal [closed]

As I understand resonators are not as stable as crystals when it comes to temperature, degradation with time, inherent ability to maintain the same frequency. I am looking at battery use, temperature ...
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34 views

Trying to draw a bitmap to an LED matrix only draws the left half

I'm EXTREMELY new to Arduino and fairly new to programming as a whole, but I thought it would be fun to try and write a program that draws arbitrary 1-bit bitmaps to an LED matrix using the Adafruit ...
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23 views

Issues with reading numbers from serial port

I've built 2 motor drivers for a robotics project and need to set positions that I want the motors to move to, and read that using the arduino. The arduino then uses a rotary encoder to implement a ...
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Bike Gear Indicator Coding Problem

Lack of practice I forgot many function of C & C++... Can anyone help me with this coding Please... I think this is The Main coding: Topic: Gear indicator I first found this, Gear_Indicator_Raw ...
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2answers
53 views

Running a motor for a 3 seconds continuously with and without interrupt

I have interfaced a dc motor and IR sensor to my nano. The DC motor is supposed to run only if the IR sensor detects an obstacle. Now, I'm trying to get the motor to turn off if continuously ...
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26 views

Four legged robot [closed]

My team has to make a four-legged robot as a part of our Robotics project. I've been assigned the electronics part. I've thought about using some Arduinos, motors and sensors. Due to COVID-19, I'm ...
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17 views

Unable to upload to Arduino Nano [duplicate]

I cannot upload a program to my nano. This was what I could see when I ticked "Show verbose Output during: upload" (During compile it just prints a lot of paths) Arduino: 1.8.12 (Windows 10), Board: "...
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34 views

Serial Read Data Loss With Arduino Nano

I am trying to use Serial reading from a python serial code (which is running on my Jetson Nano) in my project, but in some loop in my code, my data is receiving wrong. I use Serial.readBytesUntil() ...
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6 views

4-20mA output from Arduino [migrated]

I'm beginner with electronics so everything has to be explained in simple terms to me. I have an Arduino with a program which provides a value via the Analog output, so that is anything from 0-5V. ...
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15 views

4-20mA output circuit from arduino [duplicate]

I'm pretty clueless about electronics so everything has to be explained in simple terms to me. I have an Arduino with a program which provides a value via the Analog output, so that is anything from ...
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27 views

Doubt in coding of button [closed]

Febin: define soil_moisture 12 #define pump 11 Int I; #define 13 void setup() { // put your setup code here, to run once: pinMode(pump, OUTPUT); pinMode(soil_moisture, INPUT); Serial.begin(...
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How To use RDM6300 get Comma Format of RFID [closed]

Hi all i want to aske about, how can i get Comma firmat in RFID Card. Pleas take a look to red circle in the image. I wanted to return that number I only can get 47638, and miss 008 number. Is it ...
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74 views

Possibility of clean the code?

Good night! Based on stuff I get a bit here and there, came up with a program for an Arduino Audio Selector with shift registers and some features. Working as expected, only missing connecting the ...
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38 views

Arduino Project Interrupt Error?

I have a project to be made i.e. water Billing System using RFID(Mfrc522) on Arduino NANO. There is one difficulty that I haven't been able to overcome. I hope someone could help me out. Project flow: ...
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1answer
39 views

Macbook Pro CH340 Nano 14201 error

I'm using a MacBook Pro Mojave 10.14.6 to code genuine Arduinos. Been working with multiple Uno R3s, no issue. Got a genuine Nano and get the following error: ser_open(): can't open device "/dev/cu....
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What component have I fried on this Arduino Nano?

After powering up the Arduino with some circuit, a blue smoke emanated with unpleasant smell and a sizzling noise from one of the components on the circuit board. Sure signs something went very wrong. ...
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DS3231 clock module and MAX7219 displays [duplicate]

So, I have a problem displaying the hour and minutes from the clock module and, at the same time, some text I want to display. I grouped my 16 modules like this, in 4 zones: #define MAX_DEVICES 16 #...
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65 views

Parola library and DS3231 clock

EDIT2: Well, this is the "new" code and it just displays random dots on the matrices: #include "RTClib.h" #include <MD_Parola.h> #include <MD_MAX72xx.h> #include <SPI.h> // Define ...
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39 views

Splitting a string in arduino from computer

I am having an issue splitting an incoming string from a computer program to arduino. The incoming format is as follows: 123.456,987.654 \r\n The comma separates the two values. code is this(edit to ...
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17 views

Arduino problems with Picture Loop in u8glib

I am trying to create a countdown from 6 to 1 (each number will be presented on the OLED display for 1 second). I am using: Arduino nano, SH1106 OLED 1.3 inch. I tried everything that I found on ...
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1answer
30 views

How can I connect an OLED display to arduino

I'm new on this! So I want to know if is it posible to connect this oled display: oled display to arduino nano and if is it posible where can I found information of how to learn about connect this ...
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1answer
35 views

Can two electronic speed controllers be connected to the same ground pin?

I have a setup to read two sets of signals from a radio control receiver using an Arduino NANO: the throttle channel and the rudder channel. With some programming knowledge (which I have) this isn't ...
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45 views

How can I understand which arduino I need to run some code?

I want to build this project (but any other project would give me the same uncertainty): https://github.com/ltpitt/arduino-n64-controller-library But I cannot understand which arduino I can buy that ...
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50 views

PWM Input Pins Never Receive a Value from Working Receiver?

I have a very simple sketch that's supposed to intercept the signal from an RC receiver and print the pulse duration from that channel. Sketch int PwmPin = 9; unsigned long duration; void setup() { ...
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46 views

FC-16 led matrix module based on MAX7219

EDIT: const char *pc[NUM_ZONES] = { "ROOM", //0 "SUBJECT", //1 "GRADE",//2 }; I did this and I can't get them to display every row simultaneously. void loop(void) { DateTime now = rtc....
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18 views

HM-10 controller is not responding to AT commands

I recently purchased new HM-10 module, because old one was clone and it lacks AT+TYPE command. I connected it to my Arduino and I don't know why but I cant see any response in SerialMonitor. I even ...
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45 views

convert String Hex to Hex byte

My apologies if this is a naive question. How do I convert a String which has hex values to a byte array that has those hex values? This: Stirng s = "0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff"; ...
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45 views

Arduino Nano with old bootloader flash fail

I have an arduino nano clone with Chip CH340G I installed the latest version of the firmware, it's OK I loaded the blink exemple and tried to flash the arduino nano Here are my options I connect the ...
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18 views

Waveshare E Ink 4.2 inch library usage

I want to know how to properly use the following functions in E-Ink GitHub library here: https://github.com/waveshare/e-Paper/blob/master/Arduino/epd4in2bc/epd4in2b.cpp void SetPartialWindow(char* ...
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16 views

HM-10 BLE controller is not responding to some AT commands

I have HM-10 BLE controller and it is not responding to some AT commands which I need to use. AT commands which don't work: AT+TYPE2 returns +TYPE=0 AT+VERR? not responding AT+VERS? not ...
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1answer
45 views

Can i exchange my arduino nano for an atmega328p-pu in my project?

Im currently trying to make a smart light switcher that is attached in front of my rooms light switches. It basically mostly consists of two servos (to turn on or off either switch), two button (to ...
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1answer
42 views

Using RST pin as external power switch

I have Arduino Nano with powered over USB. I have the request for external (physical) slide switch acting as power on/off for Arduino even if USB is always connected. Looking at documentation and ...
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30 views

L298N bridge is returning incorrect values from enA pin

I want to read enA pin value with analogRead(enA); in my Arduino, but this pin is returning weird values between 200 and 400 even if motor is not running. I need to send state of the motor back to my ...
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2answers
22 views

An array of existing arrays

I have a bunch of 3D arrays in the following form: byte lines[][4][2] { { {B00000000, B11110000 }, {B00000000, B11110000 }, {...
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1answer
113 views

Individually addressing LEDs in a multiplexed matrix

I have created my first LED project with a hand made 4X4 LED matrix. The cathodes are joined horizontally to make the rows and the anodes are joined vertically to make the columns the columns. It is ...
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1answer
39 views

Rechargeable USB “AA” Batteries. Has anyone used them?

I have a cosplay project where I'm creating a "Megaman" aka Rockman type of arm cannon (it's actually based on DC's Cyborg). Anyhoo, I've been weighing options like using 3xAA alks or 4xAA nicd (or ...
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1answer
26 views

Arduino Nano IoT 33 Char Array size constraints

I would like to save data that I am receiving from API calls in a char array. The problem is the data is around 80KB however my Arduino IoT 33 has 32KB of memory. It will save data in a char array ...
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1answer
27 views

Serial.println using too much memory (not Strings)

I want to feed thousands of analog vibration sensor readings into an array as fast as possible, and then analyze them. Here is my sketch: const int pSensor1 = A0; const int aSize=10000; int a[aSize];...
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27 views

Saving Power :: Reducing Power Consumption

For Arduino Nano 33 IoT, I want to turn off everything except Bluetooth and Wireless since I don't use them. My question please: Can I switch off / deactivate the IMU sensors completely? If yes, How ...
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14 views

Does MFRC522 module read all 13.56 MHz RFID tags?

Hello everyone. Does MFRC522 module read all 13.56 MHz RFID tags? Or there are different types of the 13.56 MHz tags that the MFRC522 module reads only one type of them?
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31 views

IR Remote with Arduino

I want to build a remote with Arduino Nano. I have viewed many tutorials in the web, but I don't have the IR Receiver (TSOP1740). Is there any way to use Jjust an IR Led as the receiver?
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1answer
59 views

Why do I keep blowing up Nanos when I solder them?

I have blown up 2 Arduino Nanos and I'm trying to figure out what I'm doing wrong. In both cases, I was powering the boards with a 16V supply (I know this is high, but the regulator datasheet says ...
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3answers
61 views

how do i connect my Arduino Nano to my Linux Laptop

update: I uninstalled the portable package of Arduino IDE, completely, and installed the IDE using sudo apt install arduino. yes, I verified that my Nano was plugged in, the status on the bottom right ...
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1answer
23 views

How to load scal factor external to the code?

We know that, we need calibration factors (scale factors) to read current sensor data (ACS758) to arduino. I am also using voltage reader using voltage divider circuit for my project. I need to build ...
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1answer
25 views

Using L298N bridge to control smart lock

I want to use L298N bridge to power up and control simple smart lock. It requires 12V power supply, so I've used L298N bridge to power this smart lock. I removed jumper from enA pin and connected enA ...
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24 views

NRF2401 doesn't receive data [duplicate]

i have bought a module for transmitting data threw radio but with the NRF24 and the exemple code of the RF24 libary by doing exemple/RF24/GettingStarted i think to have something weird, i don't thing ...
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1answer
52 views

Burn bootloader finishes with “avrdude done. Thank you.” but bootloader didn't actually get flashed

I've built a a stripped down version of the Arduino Nano that has some peripherals removed and three connectors for analog sensors I want to use. I'm trying to burn the Arduino Nano bootloader onto ...
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1answer
44 views

Why does the LEDs affect Analog Input?

So I'm working for a project to control RGB Led Strip using microphone or sound sensor with Arduino Nano. I'm using 5050 RGB Led Strip around 120 LEDs, and I control them using simple transistor ...
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1answer
28 views

i2c scanner stuck on scanning for my 0.96in OLED screen with my Arduino Nano

My pins are connected as follows; vcc-3v3, gnd-gnd, sda-A4, scl-A5.
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44 views

Controlling a Ultrasonic driver board with Arduino

I Have a Ultrasonic driver board that is activated with a momentary switch acting as a toggle (click turns it on - click again turns it off). As the main chip has no writing on it, how would I probe ...

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