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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31 views
How to split a string in substring? [duplicate]
I have a python background and know how to do string manipulations there. Coming to arduino (C++) I kind of doesn't feel comfortable doing simple stuff that I know in python because it's more low ...
-2
votes
1answer
42 views
Share your experience on Arduino [closed]
I am a third year electronics and communications engineering student from India.
I am yet to enter the world of arduino but whatever little I have known about arduino makes me want to give it a try ...
-3
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0answers
19 views
Stuck w/ Digital Payment Interface. Shred some light :) !! & Help Me build it :)
I want to make a vending machine in my college to dispense boiled eggs 24*7, to keep going all night:) But I am completely unaware how to authorize digital payment. My aim is to create a vending ...
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vote
2answers
44 views
What is an easy way to power a 3.3v BMP-180 barometer board from a 5v Arduino Nano?
Scenario:
I have a functioning weather station (temp/humid, MQ-2 smoke sensor, anemometer), and want to add a barometer. The weather station is outside, linked to my inside display and RTC by the ...
0
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0answers
33 views
stepper motor doesn't work
I removed a bipolar stepper motor (4 wires) from an old dvd writer and I connected it to an arduino nano. I know that I need a stepper motor driver (H-Bridge) to make it work but after some search (...
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1answer
46 views
Cannot assign COM port to HC-05 bluetooth device
I can't set a COM port to my paired BT module. For better understanding I recorded a YouTube video to make sure I show everything.
Hardware:
Arduino Nano knock-off by RobotDyn (atmega168)
Bluetooth ...
4
votes
1answer
59 views
PWM multiplexing on Arduino nano
simulate this circuit – Schematic created using CircuitLab
Its a simple project. I am trying to drive 3 RGB LEDs using Arduino Nano. Since Arduino Nano does not have 9 PWM pins, the only ...
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0answers
74 views
Arduino Binary to Decimal on 5x7 dot matrix display
I need some help regarding binary to decimal conversion on arduino i wants to make a dot matrix moving display using 3 of 5x7 matrixs first matrix shows the Arrow sign which moves upside like if i ...
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1answer
36 views
Arduino Nano periodic reset under program control?
Is there a way to cause a periodic reset of an Arduino Nano under program control, short of some kind of external relay that signals the RST pin?
I'd like to do a full reset triggered by a digital ...
3
votes
1answer
30 views
I2C collision detection
I have put together a system that uses multiple Arduinos and a couple of 20x4 LCD displays to monitor my PV sun tracker and a weather station. I am using I2C to link them all together. One of the ...
0
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1answer
42 views
Does the SIM800L works in the US?
I want to know if the SIM800L works on US soil? I can´t get it to work on the H2O network! Does it work wit ATT or I only need the APN settings? If so what are the commands for data connection and ...
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1answer
36 views
Arduino Nano (3.0) Use an USB Bluetooth stick
I was thinking to build a very small USB Audio Streaming device with aux output for an amp (I know they already exist, but I like the self invention). So I bought an Arduino Nano and a USB Bluetooth ...
3
votes
2answers
68 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....
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1answer
22 views
clkI/O 256 & 1024 (From prescaler) not working with driving PWM on Nano board
I've been working with PWM in TIMER0 of my nano board.
So, it's working now and I know how to set OCR0A or OCR0B.
Then, I went to play with Clock Select Bits CS02 CS01 CS00 in TCCR0B.
0, 8 and 64 ...
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1answer
54 views
20x4 LCD will write but then won't update
I am controlling a solar tracker, and it needs to be reset every 10 minutes or it loses its mind. My program works fine, controlling power relays, so I have added I2C&Power to be able to see the ...
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1answer
49 views
Controling pump while displaying moisture value on a LCD at the same time with soil moisture sensor?
I'm new with Arduino (and I'm not very good at English). Recently with Arduino Nano I have tested:
Control water pump based on soil moisture (using relay) (1)
Display soil moiture (in percent) on a ...
1
vote
2answers
37 views
What is the best type of Arduino board for simple delivery robot? [closed]
I'm new to arduino, and I want to design a Simple Delivery Robot for Data Center, which has an arm to move items, and it follows line while moving.
I have no idea if there is a special arduino board ...
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2answers
71 views
Which arduino should i use for a very simple one pin “blinking led” type project?
I want to simply switch a relay like Majenko describes it for my last question. (time based switching of a relay)
That's the code I came up with based on the documentation:
int relayPin = 2; // pin ...
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1answer
53 views
Help Improving Debouncing
In short, I am attempting to debounce several buttons using something like a while loop instead of delays.
This code runs in a box with a series of buttons on it, if the correct sequence of buttons ...
0
votes
1answer
43 views
How do I clear sim800L buffer?
Let's say that I've tried sending an SMS directly from serial monitor or any kind of terminal. For whatever reason (syntax error, etc), my attempt fails. Now, I try sending it again, but this time by ...
3
votes
1answer
30 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:
...
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2answers
71 views
smoke came out of Arduino Nano
I was working with Arduino and Xbee with LED, circuit LED + Servomotor
and doing testing for 5 hours (not continuously).
Then once I omitted the Servomotor circuit and I connected flex sensor, ...
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1answer
89 views
Arduino Nano and WS2812's
I am new to electronics and especially Arduino based products.I am currently trying my hand at using 5 segments of WS2812 rgb led's and using a Nano to control them.I included the picture below for ...
1
vote
1answer
69 views
Prevent 5V output on Arduino Nano 5V pin
I just made an addressable RGB LED strip controller but im concerned about if I'm going to break the thing.
I know it sounds vague so let me elaborate: there is an external power supply connected to ...
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0answers
32 views
Can't reprogram atmega328p chips using nano as ISP
Using nano clone as an ISP on a breadboard- as shown here - http://www.martyncurrey.com/arduino-nano-as-an-isp-programmer/
Previously, it worked great. However, recently, chips that I have ...
2
votes
2answers
81 views
How can the Arduino check if it is connected to PC and the PC is on
I have been searching around the Internet to find if there is a way to check if an Arduino is connected to a PC or not.
For example: if my PC is turned on, the Arduino will listen to any serial ...
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vote
1answer
41 views
While condition with & bitwise of PINx read
I was looking into ATmega32u4 datasheet to configure the SPI, and there is initialization snippet for data transmission.
void SPI_MasterTransmit(char cData)
{
/* Start transmission */
SPDR = cData;
/*...
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vote
3answers
61 views
FreqMeasure.h uncompatible with my code problem
I have written code to read temperatures on a motor which also has pulse feedback to see speed, (one hall sensor) and my previous version of the code does work fine, however when i add example ...
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0answers
14 views
433M modules w. soldered 34.6cm antenna, first test
I'm doing a first tx/rx on a pair of modules, and some hams have alluded that they 'autoadjust' - since I've soldered halfwave antennas onto the modules, what's the optimal range for first tests? And ...
0
votes
1answer
66 views
Code will not run when serial monitor is not open
I have never seen anything like this. My code runs perfectly as long as the serial port is open. However if I connect it to external power, or even if I just try to run it plugged into my computer ...
0
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1answer
34 views
check string for specific characters?
I am just wondering if it is possible to check a string for specific characters. For example if my string is String mystr = "test"; and I wanted to check for the letter t at the beginning and if it ...
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2answers
27 views
Nano resets or freezes on calling a function
I'm controlling a light bulb with my Arduino Nano from serial or RF (via nRF24L01+) and I'm passing the commands as a string. After I get all the variables (3 ints) I try calling the function ...
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2answers
47 views
Soldering issue with arduino
I am trying to solder arduino nano onto a perfboard/solderable breadboard using rosin core solder. The connection is only working some of the time, when I check with a multimeter (+) at pin 29 (in ...
2
votes
3answers
197 views
A more elegant way to deal with timers without using delay()?
I am looking for a more elegant way to write a function that performs timer-based tasks as in the case of the code below, which essentially collects 5 sample values from a microphone module over a ...
2
votes
1answer
129 views
Is it possible to program an ESP8266 12F using an Arduino Nano?
I just got my ESP8266, but I am unable to program it. Since it can't be connected to via USB, I was wondering if I can program it using an Arduino or perhaps use it as a shield for an Arduino Nano. I ...
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2answers
42 views
How to insert a power button on Arduino Nano
I've an Arduino Nano to which a Micro Servo 9g is connected. The Arduino board and consequently the servo are powered by a USB powerbank connected to the board with a USB mini cable.
My question is: ...
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1answer
28 views
Arduino Nano stuck on uploading
I recently bought an Arduino Nano ( a clone actually), I installed the CH340G drivers for it and got it working perfectly fine... Played around with it for a while and then kept it aside...
Now after ...
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0answers
177 views
Sending data from Arduino w/HM10 to relay board with hm12
It all started when I tried connecting an hm10-nano to a relayboard which is bluetooth enabled. Here is my nano with the hm10 module:
And here is the relay board's bt module, which looks like an ...
2
votes
2answers
75 views
Absolute noob looking for troubleshooting help
My 10-year-old son went to a "Robotics Camp" and came home with a non-functional Arduino robot. I figured it shouldn't be too much trouble to get it working. He swears he had it operating at the camp, ...
1
vote
1answer
23 views
How to change Arduino Nano MODEL_ID
I'm working on a project using a set of different Arduino Nano connected to a Raspberry Pi through USB.
Now my question is: "how can I, from the Pi's point of view, differentiate all of those Arduino ...
0
votes
1answer
51 views
How to interface an arduino to load sensor with darlington transistor?
I have a load sensor for measuring weights , it has for wires labelled E+,E-,S+,S-. I assume S means sensor and E means excitation and the power is sent into E+ and E-.
The output of any load sensor ...
1
vote
1answer
57 views
LED bar graph script not working
I have LED bar graph on pins 2-11. Eventually I want to use a voltage divider to figure out the amount of voltage left in a power supply. Currently, this script should set the number of LEDs on the ...
0
votes
1answer
330 views
Send RF 433MHz data to Domoticz RfxCom with protocol X10 from Arduino Nano
I have installed Domoticz on Raspberry Pi and bought an RfxCom 433MHz emitter/receiver.
It works well for example with Chacon DiO 54781 door sensor.
I want to create my own sensor with Arduino that ...
0
votes
1answer
24 views
most effective ( progsize/speed ) SD card usage
I am making a project with several modules and libraries involved. I just tested the SD lib example, and got a binary at ~14KB - way too much. I'd like the SD bits to go below 8KB, since it's just ...
0
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1answer
85 views
Cannot upload sketch to Arduino Nano
I've been using Arduino UNO for quite sometime and brought a new Arduino Nano. When I connected it to my computer, the power usb lit up and the blink sketch started running ( as expected of course).
...
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0answers
75 views
cannot burn bootloader to arduino nano: content mismatch
I'm trying to burn the bootloader to my arduino nano using a USBTinyISP.
I get the following error:
avrdude: verification error, first mismatch at byte 0x0000
0xfd != 0x05
avrdude: ...
0
votes
1answer
35 views
Nano onboard “test” LED blinks when powered via 5V pin
I have a Nano (clone) that I am powering from a regulated supply via the 5V pin; I have checked this at the board and my multimeter reads 4.92V, which seems close enough (?). The main reason I don't ...
0
votes
1answer
26 views
Servo City PT785 with HS785 servo. help
I have acquired a Pan Tilt system that uses the hitec HS785 servos. These servos are (3.5 to 6) multi turn "SailWinch" servo. I was hoping someone here has Arduino code that runs them full range. I am ...
0
votes
1answer
31 views
Bluetooth radio control of a motor
I need to purchase the correct bluetooth module for interfacing some simple functionality between an arduino and a motor. The tricky bit is getting the bluetooth radio to play nice with android and ...
0
votes
1answer
90 views
How to communicate between two Ultrasonic Module's
I have two Ultrasonic rangefinders, each hooked up to their own Arduino. I want one to emit and the other to receive the sound. I can't seem to get it to work.
Here is the code for the first ...
