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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Is there a way to upload precompiled code to an arduino?

My company is developing a programmable remote control car which is driven by an Arduino Nano. We would like a way for the user to install software updates to the Arduino, but we don't want to give ...
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Did I fry my ESP8266 module or was it something wrong with it?

I was trying to connect my Arduino Nano to my home Wi-Fi. To do that, I connected my Arduino to ESP8266 module. I connected pins Arduino | ESP8266 3.3V | VCC 3.3V | CH_PD D10 | RXD D11 ...
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1answer
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Physical dimensions(size) of the new MKR1000 board?

Anybody here knows the physical dimensions(size) of the new Aduino MKR1000 board?
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Arduino Nano no output on any controllable pins except for RX and TX pins

I have 2 Arduino Nanos which don't output anything on any controllable pins except for RX and TX pins. I used an LED which I have tested works on the 3.3v/GND and 5.0v/GND. When I try to control the ...
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How to upload a sketch via Arduino Nano

I have two Nano boards, but the first one seems the CH340 chipset was burn. :( , Nano v3, CH340 chipset but unable to identify after connect to my Mac using USB Nano v3, FTDI chipset and in good ...
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Cannot disable interrupts

I am new to arduino. Why does this not work the way it's supposed to? Shouldn't it block all interrupts for 3secs after it received one from digi pin 2? How would I accomplish this: Running a method ...
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1answer
984 views

Control brightness of 20 watt street LED light using Arduino

I have searched google and I now know that if we change the resistance, we can change the brightness of an LED, but I was wondering how to change resistance by using a micro controller.
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1answer
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Can I power a 9g servo from an arduino nano with USB power only?

I want to run a 9g servo off of the pins from an arduino nano board, using only the 5v USB connection. The servo specifically is a SG90, which I have measured a stall current of ~250mA - I don't ...
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1answer
866 views

Can Android phone can be used instead of( or with) Arduino as controller?

I am Android application developer and I want to modify regular toy RC car which can be controlled by Android phone. I want to use 2 Android phones: 1 as remote controller, 1 as controller in RC car. ...
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288 views

Arduino Nano, ICSP header and 595 Shift register

I'm trying to control a 4-digit 7 segment display with an Arduino Nano, but I'm getting something wrong. I'm using the ICSP header to interface with a 74HC595 Shift Register which is then connected to ...
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Precision voltmeter using Arduino

I am newbie, I need to measure precise voltage in range 0.00-0.80V, two digits precision. The voltage will not be greater than 1V-1.2V. I wonder if I need divider or not, I am sure that voltage ...
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Porting my project to multiple Nanos

I'm still fairly new to the Arduino world. I got myself a kit with a clone board couple of months ago and have successfully prototyped the project and got it to the state I want it to be. I now want ...
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ESP8266 cannot read DHT22

I am trying to build a WiFi humidity and temperature sensor. My board is a nodeMCU using the ESP8266 connected via USB. The board is working fine with various WiFi examples and various serial examples....
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HC-05 Bluetooth Module - INQ-Command doesn't work

For a project I need to connect a Bluetooth Remote control with an Arduino Nano. The Problem I am trying to setup a connection to said Bluetooth remote Control. This device is visible! (I have ...
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2answers
1k views

Watchdog approach

I'm developing up a project that is designed to run 24/7 (an energy monitor) logging via wifi. Due to a variety of considerations I've ended up with a design that links an Arduino Nano with an ...
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1answer
6k views

Connect Bluetooth remote control with Arduino

For a project I need to connect a Bluetooth Remote control with an Arduino Nano. On the Arduino-side I have an HC-05-Bluetooth module. With the Android Application "Bluetooth Terminal" I can verify ...
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1answer
81 views

Using an Arduino as the processor for a computer-mouse-like speed detector

I'm looking at making a pretty cheap and easy odometer, eventually for an electric car or similar vehicle. My idea is to implement a big computer mouse, and track the speed with that: a computer ...
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1answer
372 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
681 views

Field Programming a Arduino with another Arduino with SD card over RX/TX lines

I am not sure if this question has been asked before but here's what I wanted to do. I have a Arduino Nano, which I need to update with a new sketch. The plan is to be able to use another Arduino (...
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1answer
163 views

C Serial Communication Code is unreliable

This going to be a difficult to debug problem but I hope some ppl here have C knowledge and idea what's going on. Given an arduino nano which is controlled by a C program from WRT54G. Here is the ...
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497 views

detecting presence inside - PIR or ultrasound?

(I am professionally a software guy working in the GCC compiler with MELT, so I am fluent in software, but much less in hardware - I did use a solder for a 74LS00 nand gate based stuff in the 1990s. ...
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Problem with serial driver for CH340G board

I bought a USB Nano V3.0 ATmega328 16M 5V Micro-controller CH340G board For Arduino and tried it with Arduino 1.6.6 on my MacBook Pro running OS X 10.11.1 The USB serial could not be seen. I searched ...
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1answer
773 views

Arduino Nano gives 7V on the 5V PIN!

I have an Arduino Nano which is Powered by an external Power supply. This is connected with VIN and GND. The voltmeter says, there are 12,12 V I have some components connected on the 5V PIN, which ...
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1answer
1k views

Issue with Serial PINs (RX/TX) on Arduino

I have an issue with an Arduino Nano. I want to communicate with it through the Serial-Port. Meaning I want to send and receive Serial commands. With USB and the "Serial Monitor" this works nice. Now ...
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1answer
2k views

Arduino Nano Atmega328P doesn't work on Macbook

I've bought and Arduino Nano compatible on eBay: But by the time I connect it to my Macbook Pro (OS X El Capitan 10.11.2) doesn't appear under "Tools -> Port" in Arduino IDE: I've followed some ...
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1answer
289 views

Negative voltage output Or Controling negative voltage

I've got an RGB led strip I'm trying to control. It's a 12v, 4 pin strip. Pin layout seems rather odd to me as 1 pin takes 12v of power and 3 pins (that go to ground) control the colors. In other ...
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2answers
762 views

Arduino countdown timer for repeating actions

I have tried to find simple library for triggering timer after some time. The idea is to retry network connection (RF24 network library). I have following code now while(!mesh.write(message, ...
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1answer
1k views

Rotating a motor with L293D

I'm following this tutorial to control a DC motor with an Arduino. I have the same problem as this stackexchange post arduino.stackexchange.com/questions/10049/problems-with-l293d where the motor is ...
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1answer
2k views

Blink question with breadboard & LED

I tried a basic Blink example and I found a strange case where : Works Does not work Can someone explain me what is happening ?
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843 views

Arduino power sources

Is it safe to connect a USB input to an Arduino (Nano) at the same time as an external regulated 5V supply to its 5V pin is connected, assuming the supplies have common grounds ? Will (I hope) the ...
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2answers
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Arduino Nano - programmer is not responding

I cannot seem to upload the simple blink program to my Arduino Nano. I keep getting the message: avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 1 of 10: not in ...
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1answer
469 views

Convert INT to Array of Strings

My sensor outputs an int. I would like this to be an array of strings so I can send it with my 433MHz transmitter. Converting an int to a string to an array of strings seems to be extremely ...
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1answer
3k views

Why are Arduino clones cheap?

You can buy Arduino Nano v3 clones from Alibaba at the cost of roughly $2-$3. I have calculated the cost for fabricating and all the parts in the BOM for Arduino Nano V3, and it ended up costing ...
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Arduino nano (clone) with ethernet shield only works when I open up serial monitor

#include <EtherCard.h> static byte mymac[] = { 0x7A,0x69,0x69,0x2D,0x30,0x31 }; byte Ethernet::buffer[500]; static uint32_t timer; const char website[] PROGMEM = "x0201g2.cloudapp.net"; ...
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2answers
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433MHz sending not receiving

I'm trying to send data using these cheap parts. When I check the voltage on the data port of the transmitter, I see what I expect, 1.2 and 0.6 fluctuating while sending. But when I check the ...
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1answer
177 views

How to connect MCP4141 digipot and a data logger shield to the same Arduino board

The main problem here is that they both need to communicate via the Arduino's SPI bus, and I know that each of the two devices will need its own CS pin (The data logger is hard wired to 10, so the ...
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2answers
2k views

Counting minutes in arduino

I have a dipswitch of 4 steps to get a binary number that will turn out to decimal from 0 to 15, So I need to get that number and make it the ammount of minutes to make something and also be aware of ...
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3answers
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Arduino Nano v3.0 with ESP8266

I am attempting to connect and use an ESP8266 board with my Arduino nano v3.0 and I am not have much luck. I have read a bunch of tutorials and articles, the most recent is http://elektro-blogger....
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1answer
4k views

Getting a binary string and convert it to decimal

I have a 4 dipswitch to get a 1 or a 0, try to get that into a string and from that get a decimal, therefor if I get for example a 0011 a 3. so, I know that from the variations of 0000 to 1111 is a ...
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1answer
148 views

Computer to multiple arduino bluetooth modules

Im going to take part in a competition called IEEE Very Small Soccer and I need to set up a communication between my computer, that will run visual and strategy algorithms, and send some commands to 3 ...
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6answers
9k views

Using / calibrating pH sensor module

I've bought this sensor module board to link to an Arduino nano: http://www.ebay.com/itm/For-Arduino-Liquid-PH-Value-Detection-detect-Sensor-Module-Monitoring-Controller/321764233326 I assumed the ...
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2answers
1k views

Ultrasonic sensor returns random values on external power supply

my Problem is, that I get random values from my ultra sonic sensor if my arduino is connected to any external power supply (vin port 30) on my arduino nano. If I power up from the laptop usb port, I ...
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1answer
2k views

What could make an LCD stop working permanently after being connected for 5 seconds to Arduino?

I was using a 20x4 LCD connected to Arduino Uno via a common I2C adapter board. Everything was working perfectly, including the LCD. I had it running like this for a couple of days without any ...
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1answer
1k views

Parallel servo control?

I have an Arduino Nano & am success fully controlling 4 servos from it but it then occurred to me that I am controlling these in a serial manner, ie I set 1 position then the next then the next.......
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1answer
7k views

Using an Arduino Nano, how many LEDs can I safely power?

I am working on building a wordclock using one of the several design ideas that you can find all over the Internet. Something like a mix of this one: http://www.instructables.com/id/Sleek-word-clock/ ...
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1answer
117 views

how much current does Arduino Nano draw when only using 8 digital pins?

I want to connect an Arduino Nano to an Intel Minnowboard Max (it's like a Raspberry Pi). I know Arduino can draw up to 500 mA current through the USB connection. Since I already need the USB to ...
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1answer
231 views

SoftwareSerial returns garbage when powered externally

I'm currently working on a project with the ESP8266 and Arduino Nano, and when I power the device via USB they talk to each other via SoftwareSerial just fine. I use the Arduino IDE Serial Monitor to ...
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1answer
187 views

Is the Serial buffer going from Arduino to PC and from PC to Arduino different?

I'm both sending and receiving strings to Arduino from my Python program on the PC and the opposite. I don't check by code if one is finished before doing the other. Are they seprate buffers, or is it ...
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1answer
745 views

make Arduino tell when the Python program stops reading from the Serial (crash, etc)

Here's the Arduino code: void setup() { Serial.begin(9600); pinMode(7, INPUT_PULLUP); } void loop() { int val = digitalRead(7); if (val == HIGH) { Serial.print("1"); } else {...
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1answer
290 views

How to network multiple Arduinos so they react to the same signal

I want to build a project that contains multiple Arduino nano's, each connected to one controlling Raspberry Pi. I would like to send one signal (a string of characters or numbers) which would be the ...