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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1answer
900 views

Choose the correct solar panel and battery for solar use

I am planning to build a weather station powered by solar power. I want to use an Arduino Nano because it's low power requirement. I want to connect some basic sensors to it (temperature, humidity…) ...
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1answer
6k views

ESP8266 wifi module sending data via jQuery

Hey all I have the ESP8266 module and I have already set it up and it's working good. However, when I run this HTML page code here: <html> <head> <title>ESP8266 LED ...
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1answer
4k views

delay() vs delayMicroseconds()

I just started using Arduino and so far I've used both delay() and delayMicroseconds(). I was wondering what the difference between these two is, because it seems to me that they're the same.
2
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1answer
48 views

Why AnalogRead shows value (395) when its on HIGH State ? why not shows 1023 when its high State

I Took a output from ESP8266 and Connected it with Arduino Nano Analog input A0 i use BLYNK app to on/off D0 pin in ESP8266 , and i connected ESP8266 D0 pin with Arduino Nano A0 analogPin. when ...
2
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1answer
115 views

Arduino nano KiCad symbols

Can anyone explain me the difference between the symbols for Arduino nano in KiCad? Is there any important difference at all? All of them seem to have all basic pins.
2
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1answer
55 views

Controlling op amps amplification ratio by arduino

Is there any option how to control amplification ratio of operational amplifier by some logic signal which can be produced by arduino? I am talking about some clasic op amp like lm356 or ui741 in ...
2
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2answers
99 views

Getting different numbers after sending an unsigned int 8-9 times between Arduinos via Serial

I am trying to transfer unsigned int values between 2 Arduinos. When sending 61805 for the first 8-9 times, I am getting 61805. But after then after these numbers: 61937 28013 61937. Sender's code: ...
2
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2answers
59 views

If condition for switch not working as expected

I am trying to write a simple program to control one LED with two switches. If any of the switches is pressed, I want to turn the LED on. My LED however is always ON even when none of the switches are ...
2
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1answer
108 views

Arduino "Maximum Power point tracker" (MPPT) Problem

I need an IV curve for a solar panel. As far I know, solar-panel and Diode IV curve pretty much the same. Here, I am using diodes(6A10-1) as a solar-panel. Where each Diode voltage drops 0.6volt. I ...
2
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2answers
135 views

Powering a system using batteries

I made an arduino nano IR sensor based auto liquid dispenser. Currently it is being powered by a 12V 2 amps adapter. The 12v adapter is connected to a LM2596 DC to DC buck converter which converts the ...
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4answers
82 views

Delay stops execution forever sometimes

I have an arduino to control an irrigation system, consisting on one pump (called "bomba" on the code) and 5 12V water valves. Each valve controls one irrigation circuit and the idea is to open each ...
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2answers
2k views

How to send and receive unsigned int from one arduino to another arduino

I'm trying to send some big numbers ranging from 0-62000 from one arduino to another via serial communication. I'm using unsigned int to hold values from 0 to 65535. And I'm using serial.print() and ...
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2answers
1k views

NRF24L01+ (TMRH20 library): Receiver gets blank data

I am working on sample Arduino project for communication over NRF24L01+ (TMRH20 library), everything is working fine with my example except one issue my Receiver gets message but that message is blank....
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1answer
146 views

tty doesn't list ttyUSB0 so arduino doesn't list serial ports

Okay so lsusb gives Bus 002 Device 019: ID 1a86:7523 QinHeng Electronics HL-340 USB-Serial adapter dmesg|grep 'ttyUSB' gives [63723.589107] usb 2-1: ch341-uart converter now attached to ttyUSB0 ...
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3answers
390 views

Memory problem? dtostr() and strcat()

I've been dealing with this for quite a while now and searching all over for answers.. I'm trying to put together two floats into a char*. Separated by a ",". This is the code I'm working with. #...
2
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1answer
397 views

How can I swap a servo with a stepper motor?

I'm looking for a way to swap servo 1 with a stepper motor to achieve a single direction circular motion with stops and delay. Instead, now I have the servo going back and forth to repeat the action. ...
2
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2answers
723 views

connection for hall sensor 4 pin and arduino nano

I'm not from electronics background so I don't know what should be the connections. My Hall sensor has 4 pins(AO, GND, +, DO) So, I have connected hall sensor pins to Arduino nano pins in this order(...
2
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1answer
1k views

ESP8266 disconnects after relay switch

the aim of the project I'm working on is to water my bonsai automatically, depending on numerous sensor inputs. So basically I have Arduino Nano with huminity and light sensor, a relay to switch the ...
2
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1answer
1k views

Arduino nano select port option is blurred | Driver issue

I have just bought arduino nano board. when i connect the board via usb, system detects the new device but i am not able to select port in arduino ide for writing any code on board. I checked my ...
2
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1answer
3k views

Does SoftwareSerial use hardware timer?

I'm asking this because I'm using a timer to generate a 38KHZ signal to drive an IR diode, and I also need to use SoftwareSerial to talk to an HC-12 radio using serial communication. The code I'm ...
2
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1answer
271 views

Brownout with Arduino Nano

I'm making an RC car with the Arduino Nano. I'm using RF433 as wireless communication with 2 motors and L293D as the motor driver. I use 4 1.5V batteries to power the Arduin and another 6V battery ...
2
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1answer
7k views

Arduino Nano nRF24L01+ DFPlayer Mini SPI Problem

I'm working with an Arduino Nano board clone (CH340) on wireless control of DFPlayer Mini, transceiver sending a Struct variable with MachinePrefix (just in case), sound type (I have more folders by ...
2
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4answers
193 views

Is there a way to keep a program on the Arduino after uploading new sketches?

I am looking for a way to keep a program on my Arduino Nano 3.0, after uploading new sketches on it. I would like to have a program on it that will control th screen and buttons at it. The user will ...
2
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1answer
148 views

Can I detect with software when a PIR sensor is physically connected to Arduino?

I'm creating a circuit using an Arduino Nano + ESP8266 to allow LED remote (via mobile app) activation and configuration (RGB colour, timeout, etc.). The circuit also has an optional PIR sensor to ...
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2answers
97 views

All of the sudden the Nano will not accept programming

I have been working merrily along with CH340 to make Com10 work. It has been working flawlessly but now I am getting various messages like it can't open the port then the programmer is not responding....
2
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1answer
167 views

Self made microphone burns Arduino

I'm very new to electrical engineering and I'm trying to read microphone input with Arduino Nano. I've made a separate microphone module (based on this example) and plugged it into Arduino like this: ...
2
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2answers
7k views

Can I use two sensors with different baud rate without problems on arduino?

One sensor has a baud rate of 115200, the other 9600. I think this will create problems in the serial because I can only choose one baud rate. What do you think? The first sensor is the pulse sensor, ...
2
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1answer
398 views

Module and library for self healing large sensor network

I have to build a wireless sensor network with arduinos on my project. It does not need to be a mesh network, but it needs to have self healing capabilities. I would like to use something cheaper ...
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2answers
2k views

Programming ATmega2560 processor with FTDI instead of ATmega32

Has anyone tried to program an ATmega2560 with an FTDI chip as is done in the Arduino Nano (this is for a custom design). Will it work?
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2answers
4k views

Arduino unable to read from XBee Series 2

An XBee Series 2 is set to Router AT whose TX and RX pins are connected to an Arduino Nano's Rx and Tx pins respectively. The Arduino is connected to a Mac OSX via USB. A second XBee Series 2 is ...
2
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1answer
40 views

Programming ATMega4809 via Atmel-ICE with Hex File from Arduino IDE - why doesn't the code loop / work?

Background I am programming a 40-pin ATMega4809 (datasheet) using ATMEL-ICE programmer. I'm simply using the Atmel Studio to upload a HEX file to the chip. I generate the HEX file using the Arduino ...
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2answers
114 views

Arduino Pull-Down Resistors

I'm building what I thought was a simple Arduino Nano project... right up until it caught fire! I am a long-time reader of stack exchange and I always find the answers to my questions somewhere on ...
2
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1answer
91 views

How to fade LED in a defined time using FastLED

I'm using FastLED library, Arduino Nano and 5 addressable LEDs (WS2812B). I'd like to create the sequence in the image attached. (all in white color for example) I know how to turn ON each LED every 0....
2
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1answer
55 views

Arduino does not boot when SPI lines are loaded

i connected an Arduino Nano to an external SPI Flash using THIS tutorial (russian) and the SPIMemory library. While accessing the Flash works well, i have encountered the following issue: The Problem: ...
2
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3answers
147 views

Create a dead zone for joystick

I'm trying to create a dead zone so the joystick will turn the motor off completely when in the center position. It's much too sensitive and will start the motor if barely touched. How could I fix the ...
2
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1answer
36 views

Thermistor returns correct value on Arduino Nano, completely fails on Arduino Uno Wifi Rev 2?

I am completely baffled. When I wire the thermistor into my Nano, everything reads completely fine. Then when I switch to the Uno Wifi Rev 2, I get negative numbers -40 to -80 when I was reading 24 on ...
2
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1answer
197 views

Trouble with Arduino Nano Every and radio transmission using RH_RF69.h

I give some help for students working on the Cansat Contest. I am trying to connect a RFM69 Radio Module to an Arduino Nano Every. Nothing works : compiling the simpliest program: #include <RH_RF69....
2
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1answer
175 views

Can't get "Burn Bootloader" working - Arduino Nano

This is a follow up from a previous question. I have one Nano working perfectly (I think) (Nano A) and another one (Nano B) which seems to be working but has no bootloader. So I am trying to use Nano-...
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2answers
69 views

How do I know when filter coffee machine is finished by using any sensor? [closed]

I have a filter coffee machine that seems like the following link ; https://www.electrolux.com.tr/kitchen/small-kitchen-appliances/coffee-makers/coffee-maker/ekf5300/ and I would like to send a ...
2
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2answers
190 views

Programming Questions / Capacitive Soil Moisture Sensor

Good day All, This is my first time posting to this forum and kind off my last resort as I would've liked to figure it out myself. I am trying to create a soil moisture probe which can be used on ...
2
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1answer
75 views

Communication between ESP01 Arduino NANO and using External Interrupt in Arduino NANO for other than communication program same time

I have done communication between ESP01 and Arduino NANO (ATMEGA328 based). ESP pins used are GPIO-0 and GPIO2. In NANO, used D2 and D3. This program working Ok. Now I want to add external interrupt ...
2
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1answer
214 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: ...
2
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1answer
64 views

Morse Interpreter-Microphone Problem

I am working on a morse interpreter. I can now use light-sensor and a regular key as input device and want to add a mic to the system. I recieve the input convert it to text and show it on nokia 5110 ...
2
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1answer
3k views

I need help with U8GLIB library

I have a project which uses a 128x64 oled display. I have to use the U8GLIB as the available displays change from SSD1306 to SSH1106 depending on when you buy it which that library covers both ...
2
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1answer
222 views

nrf24l01+ contradicting itself?

I have recently bought a few of these chips on boards along with some "adapter boards" which supposedly regulates the 5v to propper 3.3v with the required capacitors. So power supply shouldn't be a ...
2
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1answer
295 views

My Arduino Fingerprint Sensor FPM10A is not working with an Arduino Nano with Atmega168 processor

I recently bought this Arduino Fingerprint Sensor FPM10A from Aliexpress. So, when I connected it with my Arduino Nano and uploaded the 'enroll' example and opened the serial monitor. The fingerprint ...
2
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1answer
956 views

How to connect an Elegoo Nano to a Raspberry Pi and program it?

I own an several Elegoo Nanos and a Raspberry Pi. I would like to connect an Elegoo Nano to the Pi and upload nanpy onto the board and control it's GPIO pins. I have plugged the nano into the Pi and ...
2
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2answers
324 views

Merging arduino code

I have a project where we need to create a virtual cane for blind people and it will have 3 functions: Pressure button when pressed will connect to an android phone through HC-06 Bluetooth modulo to ...
2
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1answer
244 views

Water flow sensor unable to get readings

I connected my "arduino(nano)" to "water flow sensor" and wrote a code which simply prints the readings like 0-1023 and tested it. First i got the readings but now i'm not getting it. My code looks ...
2
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2answers
46 views

Can we use Arduino mini in eagle to create new custom modal

I want to learn pcb design in Eagle/Fritzing. So i was thinking of using existing amazing Arduino mini/nano in eagle and create a custom pcb which has all arduino capability and plus some components ...

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