1
vote
1answer
17 views
Help with LCD's menu and seeing values continuously
I want to see the voltage data from from tha void volt(); When I go to the "Item2SubItem3" (void menuChanged). Now I can see only one time the data because i call once void();. How can I see continue ...
1
vote
2answers
13 views
Is it correct to use pulseIn() in ISRs?
Since it is not right to use millis() in an ISR to calculate duration of the input, Is it correct to use pulseIn()?
1
vote
1answer
13 views
Help choosing a servo motor
I am struggling to choose servo motor for my project. There are two servos on ebay. Th First one is named Only "Towerpro micro 9g servo" and the second one that is cheaper is named as a "Towerpro 9g ...
1
vote
1answer
19 views
Can someone prefer just using a HC-06 module instead of using 1sheeld?
Why would someone buy 1sheeld? Why not connect Arduino to the smartphone using HC-06 bluetooth module and find an app required on the Google app, like for example RoboRemo. What is the advantage of ...
0
votes
1answer
21 views
Connect multiple modules to arduino micro
guys
I'm beginner at arduino. Need you advice.
I have arduino micro and I want connect LCD module and bluetooth to it.
Problem I've faced there is no enough power pins for that.
I understand ...
0
votes
1answer
24 views
Timer 2 interruput atmega328p and make measurement in ISR
I am working in my project and i want to use Timer2 interrupt every 100ms to get new measurement from the output of my 5 sensors which connected to pins A1,A2,A3,A4,A5.
I read in some article that ...
0
votes
1answer
22 views
How to measure the state of charge of a battery in arduino
This questions has been formulated several times with not clear answer, and I wonder if there is one.
it is well stablished from several sources that measuring the voltage of a battery alone is not ...
0
votes
0answers
9 views
Arduino in Eclipse IDE: How to add SPI library (core library already added)?
I want to use eclipse for arduino programming, so I followed the guides to set up a static project for the arduino core library. Then I added the library file (.a) and the .h and .cpp files to my new ...
1
vote
2answers
26 views
Why does the standard Arduino IDE not include the CH341G USB Drivers?
Can anyone explain why the standard Arduino IDE 1.6 distribution does not include support for the popular CH341G USB/serial drivers?
I am using these USB/serial chips in several teaching projects for ...
0
votes
1answer
26 views
Reducing read time for reading DS18B20 temp sensors
I have a number of temperature sensors connected up to an Arduino - I've split it into 3 sections, with each section having a 2-4 sensors on it (due to distances). This works, but the code I'm using ...
0
votes
1answer
24 views
Getting values from multiple thermistors - one value glitches all over the place
I have a circuit with preferably long wires that get data from thermistors. The Arduino sends this data (formatted in JSON) to a web server where it can be collected by another program.
Some of ...
0
votes
0answers
23 views
SIM 900 stop after 1'5 hours; what's wrong?
I have a Gboard module (from Itead) configured to recieve data from Xbee sensors, and log data to a server DB on inet (via GPRS). This module is programmed with Arduino IDE.
I turn on the module ...
0
votes
2answers
14 views
lininoIO running “partially”
I installed LininoIO (OS date 02 06 2015).
Everything seems to work fine - but last not least nothing works as expected.
I have a running linux - but when I try to use GPIO like describe here ...
0
votes
1answer
33 views
Better method for PROGMEM data access with multiple indirection?
-edit-
This is a simplified recreation of personal learning project I have ongoing. My issue is in accessing data in flash, the path to which includes multiple layers of indirection. When the data ...
0
votes
0answers
30 views
ESP8266 problem as Web server
I asked a previous question about esp8266 that made a lot of things clear for me that esp8266 is very powerful and can be independently used as the webserver now, I have used the following ...
0
votes
0answers
11 views
How to configure xctu to create chain of three XBEE
I bought three Xbees from here .I want to send data from one side of big mountain to another side. My plan is to keep two xbees on two side of mountain and one xbee will be at the top of mountain to ...
0
votes
1answer
29 views
Updating a sketch to work with IDE 1.6.6
I've got a MAX7456 chip and I am using this (this is the unmodified one) library with it.
There's a sketch inside the examples folder (Max7456WriteTable) that I need to get to work to update the ...
0
votes
3answers
30 views
Arduino ,How I can see the value (0 or 5) on my screen, where I connected my sensors output to analog input A0,A1.. pins
I am working in my project and I want to see the output of my sensors as (0 or 5 ).
the maximum read was 770 and the minimum read was 0 so ,How I can see the value (0 or 5) on my screen, where I ...
0
votes
1answer
21 views
Hi-speed external ADC
I would like to detect signals in nanosecond scale. For that, an ADC with at least 500 MSPS is required.
My question is if its possible to use an external ADC with 500 MSPS with a 16MHz Arduino Mega? ...
0
votes
1answer
6 views
Arduino Mega 2560 R3 with Shield Model Wireless SD R3 not working
Recently I've bought an Arduino Mega 2560 R3 and a Shield Model Wireless SD R3 from http://www.amazon.de/Arduino-A000065-Netzwerkkarte-Wireless-SD-Shield/dp/B00L1FO860. I try to run the example from ...
0
votes
1answer
18 views
ISP - Wrong direction frying ATmega
I tried to flash my ATmega328P-PU not over the Arduino but over a self-made programming board and an USBasp. The problem is, I made the board a while ago and didn't mark which direction the 10-pin ...
1
vote
1answer
20 views
arduino boards manager configuration
I installed the Arduino IDE 1.6.4, and used the "boards manager" to install the package for Arduino Due.
I am using c++11 in my project so i need to add the compiler.cpp.extra_flags=-std=gnu++11 like ...
-1
votes
2answers
35 views
Disabling a push button after being under pressure for some time?
Disabling a push button after being under pressure for some time?
I need to disable a button where the user is pressing for a time it is disabled.
Code:
int ledPin = 13;
int inPin = 7;
int val ...
0
votes
1answer
17 views
Having issues with sending output to WiFi Shield
I am doing simple proof of concept trying to send C++ program output to Adafruit CC3000 WiFi Shield (using Visual Studio 2013 Desktop Edition on Windows 8.1).
In my design laptop is connected to UNO ...
0
votes
1answer
21 views
How to wirelessly communicate with I2C infrared thermometer
I've been getting involved with arduino recently as a means of improving a heating device which is quite small, a box about 15x10x5cm which I would like to rig with an MLX90614 infrared sensor.
The ...
0
votes
3answers
36 views
I'm looking for a real small but decent Arduino, that can fit in a watch but power a servo and a gyroscope
I've been scouring the internet looking for a small Arduino that can power two sensors and a servo. Is there a way of getting a custom one? Does anyone know if theres software out there for creating ...
0
votes
1answer
27 views
Need assistance with program for POV Project
I've created a very basic POV project.
It has a 12V DC motor with a piece of wood on it.
The wood has 6 LEDs on it as well as a copper ring.
The power is delivered to the LEDs from brushes connecting ...
0
votes
2answers
30 views
How do pins on an arduino mega 2560 work?
I got a copy of Arduino from a local retailer here (it's a local copy and I'm pretty confused with how the pins actually work).
I know basic electronics so far, there should be two pins for every ...
0
votes
1answer
19 views
Which board/shield to generate (non-PWM) analog outputs?
I am currently building a project involving a laser scanner (two galvanometers with mirrors that deflect a laser beam) that I want to control. The galvos need +-10V differential signals (and I'd like ...
0
votes
0answers
13 views
Making CS (chip select) work in SPI (for and SD card and OLED)
I'm working on a project that will log data to an SD card and display a user interface on an OLED. The SparkFun OLED breakout was super easy to set up. I was also able to get the SD-Card library ...
1
vote
2answers
30 views
Motion sensor large areas
I'm looking to build a motion sensor which detects if an object is in the monitored area. Doing some researched I found out that I can use PIR motion sensor for this but it seems the area it monitors ...
-2
votes
1answer
13 views
How can we connect Arduino with matlab for displaying the value detected through the Arduino Uno [on hold]
i need the codes as well as the steps from the starting.
a = arduino('COM5');
and then do stuff like:
av = readVoltage(a,5);
writeDigitalPin(a,13,1);
delete(a)
or if you have an Adafruit motor ...
0
votes
1answer
26 views
Sending Data between two boards using SoftwareSerial
I'm attempting to connect two Arduino boards to eachother using SotwareSerial as the title suggests!
The two boards are 1) Arduino UNO and 2)MultiWii Controller (MWC) FLIP 1.5 (Uses ATMega328 chip).
...
0
votes
1answer
24 views
MCP23S17: Programming IODIRx-Register works in loop(), but not in setup()
I use a single MCP23S17 connected to an Arduino Uno. I use its port B for output and port A for input. When I first started to use this device I noticed, I could read pins, but using them as output ...
1
vote
2answers
35 views
How to develop or edit an Arduino library?
I'm not sure if I should split this question in two.
I had to edit some libraries and I plan to make some myself but didn't try yet.
Editing a library seems very laborious comared to editing a ...
2
votes
1answer
27 views
Arduino LCD Simple Problem
Hi my lcd doesnt display that i was expected. Can anyone help me???
RS-->22
RW-->GROUND
E-->23
D4-->24
D5-->25
D6-->26
D7-->27
#include <LiquidCrystal.h>
LiquidCrystal lcd(22, 23, 24, 25, ...
12
votes
2answers
774 views
Why use an int variable for a pin when const int, enum or #define makes much more sense
Why do people use a variable to specify a pin number when the pin is unlikely to change throughout the execution of the code?
Many times I see an int being used for a pin definition,
int led = 13;
...
0
votes
1answer
24 views
SoftwareSerial Write to return Read in Serial Monitor?
Hoping someone can help me out in my conundrum here...
I currently am testing the SoftwareSerial library out to understand how I may use it in my project.
I have a wire running from pin 6 to pin 9, ...
0
votes
1answer
36 views
Transient and reverse current
Does anyone know (1) how much transient current can be output from a pin and (2) how much (and how long) reverse current an output pin can take? For instance, consider the following circuit (driven ...
0
votes
1answer
41 views
How to update the character table of MAX7456
I've got a MAX7456 chip and I am using this library with it.
But the issue is that the character table is not the one the library needs to function like it should. The "Hello world" example is ...
0
votes
2answers
24 views
Streaming sensor data over UDP using an Arduino Yún - how to do it and how fast could it be?
The company where I work wants to do a proof of concept for our new product, a force-sensing platform.
The platform contains four three-axial load cells, so we have 12 channels, which are to be ...
0
votes
3answers
38 views
Solutions for displays?
I am trying to find cheap options for displays about 3 x 6 inches to display time, weather, simple clip-art type images, and other marquee messages. What are my best options to work with arduino if ...
0
votes
1answer
27 views
How do I use an Arduino as a USB output device for a 2x16 display?
Can I make a USB 2x16 display using an Arduino?
I want to control a 2x16 character lcd display using USB, not com port/serial.
I need it to appear as a HID device when connected to the computer.
...
0
votes
1answer
66 views
+50
Can't get Arduino Leonardo working as a USB keyboard in Windows 7
I can't believe I am stumped by this, but this is my issue and I can't see any other solution for this anywhere.
I have an official Arduino Leonardo loaded up with the following code:
void setup() {
...
0
votes
0answers
26 views
Two arduinos communicating via serial - wrong data
So, I am trying to get two Arduinos to communicate one way via serial. One is a Mega2560 and the other is a ProMini328, but that shouldn't be important. The ProMini sends a stream of serial data at ...
1
vote
1answer
14 views
Reading RFID tags with Arduino IDE, not using Arduino
I am completely new to this technology, but I'm hoping to build a fairly simple program through the Arduino IDE that takes the serial numbers of RFID cards read through my ID-20LA Innovations RFID ...
0
votes
1answer
27 views
Passing class member function as argument
could someone please help me a bit.
I need to pass a class member function to server.on, unfortunately i get na error.
error: no matching function for call to 'ESP8266WebServer::on
I have done some ...
0
votes
1answer
21 views
Will the Uno bootloader work in the Duemilanove?
I had an old duemilanove lying around (Which was not working because i accidentially busted the atmega) and I recently bought some atmegas pre-flashed with the UNO bootloader. So I tried to put one of ...
1
vote
1answer
31 views
Tone() working on all digital pins?
Looking at my Arduino Uno board, it appears the digital PWM pins are #11, #10, #9, #6, #5 and #3.
When playing around with the Theremin, it seems that the Tone() message works on all pins regardless ...
0
votes
1answer
17 views
Arduino messing up as slave over i2c
So I have an Arduino Mega2560 and a Raspberry Pi hooked up through i2c. The pi is acting as the master while the Arduino is the slave. While sending data over I2C the int message gets messed up and ...
