All Questions
0
votes
0answers
2 views
Six pin HC-06 Bluetooth module? Is this possible?
I'm doing this project which specifically states that I need an HC-06 Bluetooth module however the schematic clearly shows a six pin Bluetooth module labeled HC-06-JY-MCU however I was told by someone ...
-5
votes
0answers
7 views
http://dragonblazewiki.com/
http://dragonblazewiki.com/
anytime heard of a beddy-bye diet?" Herbal asked as we sat at Mel's
Diner one morning. "I apparent it on the Internet."
[url=http://dragonblazewiki.com ] Free Musically ...
0
votes
1answer
6 views
Networking multiple Arduino Megas and updating their programs from one master
Is it possible to link multiple Arduino Megas using RS485, for example, and update the program on client Megas from one master Mega, as well as for them to communicate with each other? Whilst I found ...
0
votes
0answers
5 views
Arduino shield/driver and stepper motor compatibility
I am an absolute beginner so pardon me if my questions are basic.
So as far as my project is consernder... I'm building a "3 stepper motor" robot.
Now my budget is quite small so I went online and I ...
0
votes
1answer
5 views
System Is not Functioning Error. Windows XP, Arduino Uno R3, C# Listen SerialPort
Can anyone help me with this issue.
We created an arduino project. We listen microswitch.
If switch click, Arduino send basic serial data.
And C# application read serial port.
This solution is ...
0
votes
0answers
3 views
How to establish MQTT communication with arduino using ESP8266 over softwareSerial?
I want to establish MQTT communication with MQTT server and Arduino. I tried so many Arduino libraries for ESP8266 but none of them are compatible with PubSubClient over software serial.I am using ...
1
vote
1answer
15 views
Arduino IDE menu doesn't display properly (missing letters)
I have just installed newest version of Arduino 1.7.10 from arduino.org.
It has this problem that its menu are not displaying properly - when I hover mouse over items in menu they either disappear ...
0
votes
1answer
13 views
Can I use Arduino Nano V3 to program another arduino (Pro Mini)?
I was planning to buy serial to USB converter (FT232RL) to be able to program Arduino Pro Mini.
But the shop nearby offers Arduino Nano V3 at almost the same price.
Could I use this Arduino instead ...
0
votes
1answer
9 views
Use of two external power sources for a power cell - charger
I have a SparkFun Power Cell - LiPo Charger/Booster and want to use the external 5V charge capability. Now my question:
Can I directly hook up a DC jack (for a 5V power supply) and an inductive ...
0
votes
1answer
10 views
How to import data from SDcard on Arduino to the computer using Arduino serial/COM port?
I have Arduino UNO with Adaruit wifi shield. I store some data on the sd card successfully and now I need to import that data on to the computer.
I am sending some token, say "1", to the UART port of ...
0
votes
1answer
25 views
Is it possible to have an array of int arrays?
I have a huge number of arrays, each with a series of numbers each referring to an LED on a strip. I want to be able to address each one by a number, so the logical solution to that for me was to make ...
0
votes
0answers
16 views
Analogread varying with battery voltage in attiny88
I am using an attiny88 powered with batteries to make an analog reading from an IR sensor.
The system works well when the batteries are new but the readings drop when the batteries are low.
I set ...
0
votes
2answers
41 views
Code doesn't seem to work when trying to program 2 sensors
Can anyone help me with this issue
I'm trying to program two FSR sensors through typing this code but I've realized that one is working instead of two.
The logic behind the code is that if you were ...
0
votes
1answer
24 views
How do I pass an Int Array into void for a foreach loop?
I know its probably an odd question...but I found a workaround for a foreach loop in C. I have a whole bunch of int arrays that I would like to be able to pass into a void, which has that foreach loop ...
0
votes
0answers
14 views
IR sensor does not work well on carpets
I have facing a problem since long and cannot solve it. I built Arduino car and place 2 IR sensors shown in image, to check down distance to avoid falling from stairs. One is at back and other at ...
1
vote
1answer
26 views
Is it safe to place a capacitor across vin and gnd?
I have a 3A fan hooked up to an ATX power supply in parallel with a transformer which powers my board through VIN/GND.
The ATX is gated by a relay on its DC side and seems to cause enough of a ...
2
votes
2answers
35 views
Do I need 3 voltage dividers to control ESP8266
I am buying an ESP8266 and the plan is to control it serially from an Arduino. I am going to use a voltage divider(Using a voltage divider is temporary and I know the cons of using voltage dividers).
...
1
vote
1answer
12 views
Using an Arduino to drive a digital RGB LED strip
I recently purchased a 5M strip of digital RGB LEDs, that is compatible with the "Adafruit_NeoPixel.h" library.
Is maintaining the original order of the LEDs important? Could I cut the strip in say ...
2
votes
1answer
9 views
Value of joystick reduces when I send it over serial
I've got two arduino cards and two bluetooth bluesmirfs. I am currently trying to read value from a joystick and send it over to the other arduino card and use that value to control my servo motor.
...
1
vote
1answer
45 views
I’m having a tough time trying to program 2 fsr sensors
Can anyone help me please?
I’m having a tough time trying to program 2 fsr sensors. The logic ...
1
vote
2answers
42 views
Atmega328P - SCK pin
I am using Atmega328p with arduino bootloader in a project. There happens to be an LED connected on SCK pin. During Start (or restarts), the LED appears to flicker a couple of times (3 times to be ...
1
vote
2answers
648 views
How to turn two LED's on and off with one button?
I was wondering how to write a code that would do this, WITHOUT using IF and ELSE: when the button is pressed, one LED is on and the other one is off, but when the button is not pressed, the LED that ...
0
votes
1answer
16 views
Using two ultrasonic sensors together
Using two ultrasonic sensors together, how can I enable one before the other?
0
votes
0answers
17 views
Why ModBus RTU Master-Slave Dont Work
I have two mega arduino and want to them communicate with modbus rtu together, i use below link circuit for this :
...
0
votes
1answer
21 views
error loading an array of strings
I'm trying to have a user enter a series of strings. This is my code.
this is my error message - cannot convert 'String' to 'char*' in assignment
char* titles[] = {"entry one", "entry two", "entry ...
0
votes
0answers
13 views
Error loading Blink sketch in esp01 (esp8266)
I have the esp01 connected the serial port using a usb to ttl serial cable and also using the Arduino UNO as suggested in some tutorials. I can execute AT commands. But loading a sketch from Arduino ...
0
votes
0answers
16 views
Creating date string for error log
Well, googling didn't do much to help me here and I'm shocked that something I can do in two lines of code in C#
DateTime dateTime;
string text = dateTime.ToLongDateString();
is this difficult ...
3
votes
2answers
79 views
What is the best way to get more RAM for a sound buffer?
The problem:
How to extend the memory for a sound buffer (intensively used) if:
SD card library supports only one file open at a time (and I have one open already)
EEPROM chips are able to stand ...
0
votes
0answers
12 views
What is the proper way to send data through http using sim908?
Preamble:
I have a sim908 shield and I'm trying to send some data periodically to a server using AT commands.
For every command, I wait for the response to check if everything is working.
Actually ...
1
vote
1answer
26 views
Time Stamping data on an Arduino and reading it on a Java IDE
Does anyone have an idea on the best way to time stamp an arduino sketch that contains a data packet which is to be read out using a java IDE (IntelliJ) for graphic visualization of the packet. I ...
0
votes
1answer
35 views
Serial Communication Between Two arduinos (Asking and Receiving)
Can anyone help? I'm trying to develop two sketches, where data can only be sent when a request is made for it between two arduinos. A simple hello world message can suffice. I tried out the Serial ...
1
vote
0answers
36 views
How to monitor a sensor for specific period
As noted in earlier posts, I am building a model railroad crossing gate signal, complete with gate arms, flashers and sound. Although I haven't settled on exactly how I am going to implement detection ...
1
vote
1answer
15 views
Working on a reaction test for the Arduino Uno using an led and an lcd shield
The situation involves some Asm inline practice and a basic circuit. The program turns an LED on after a somewhat random period of time then waits until the button is pressed to report back how many ...
0
votes
0answers
10 views
communication with hctl 2021 a00 decoder
I am trying to use a rotary encoder with the HCTL-2021-A00 from avago. I am using it with a teensy 3.2 I am getting data output from the IC, but only one of the two bytes which it should be providing. ...
0
votes
0answers
16 views
problem in Arduino sim900 and gps don't work together
i work in project to send coordinates over sms and i have a problem with sim900 gsm and gps don't work together
i use tinygps for gps and
i show this problem and apply the solution but i have the ...
0
votes
0answers
16 views
Using L293 as step-down convertor
If my power source provides 12V, and my motors are rated for 3V-6V, will it be OK to use the L293 motor shield and just provide the PWM pin of the motor shield with 25%?
Is it a feasible option?
...
0
votes
0answers
17 views
Camera wont take picture
I'm trying to get a JPEG camera working, but every time I try it doesn't work. The command it gets stuck at is cam.takePicture();. I looked into the libraries and the takePicture command is int ...
0
votes
0answers
16 views
Edited library .cpp isn't changing / compiling
I've made some minor changes to a library (just the .cpp, not .h), and the changes aren't taking effect when compiling. Even outlandish errors have no effect.
I've tried in VS2015 (my normal ...
0
votes
2answers
32 views
Using a button to cycle an array
So. I would like to cycle thru an array using a button. My current code goings thru if statements when the button is pushed. In each if statement I have a loop to print out a list of strings. I am ...
0
votes
1answer
37 views
Strings that always stay empty
I wrote an app that listens on the network for command over UDP and sends back an answer. Whatever I try to put into my answer never get sent. The string is always empty. The following code prints a ...
0
votes
1answer
34 views
ESP8266 Arduino 2.2inch ILI9341 TFT library
I recently got one TFT LCD from aliexpress which supports SPI and uses ILI9341.
This is the one.TFT LCD
I have the ESP8266 EspressoLite 1 board, and I am using ESP8266 Arduino.
...
0
votes
0answers
12 views
Controlling brushless gimbal motor
I'm using a standard board for control this type of motor (SimpleBGC), this board uses an atmeg328p e some brushless drivers. I'm writing a simple code for turn left/right with some velocity, but i'm ...
0
votes
1answer
32 views
I'm having some undefined references and can't figure out why
Try verifying the code to see the errors. This is on a arduino nano with a 328 processor. I put the necessary library in the code.
Pastebin for code
#ifndef Pushbutton_h
#define Pushbutton_h
...
0
votes
0answers
23 views
How to use the timer to generate a pulse wave of the specified frequency and duty cycle
So we have the tone library, which produces a 50% duty cycle square wave of varying frequency, and analogWrite() which produces a fixed frequency wave of varying duty cycle. Is there any way to ...
0
votes
1answer
27 views
Powering two L298N motor boards with external supply
I have been struggling with this as i'm a complete electronics and arduino beginner. I am trying to power two dvd-drive stepper motors using two L298N motor boards.
For some reason, I can't figure ...
0
votes
1answer
30 views
Three phase sine wave inverter using Arduino
I want to design three phase sine wave inverter using Arduino I found this link with circuit diagram and simulation results but he did not provide code. can anyone help me with code ...
0
votes
0answers
18 views
What programmer do I select in Arduino IDE for the ATMEL-ICE ISP?
I have been using an AVRISPmkII for many years and have just transitioned to ATMEL-ICE ISP after the AVRISPmkII became unavailable.
Occasionally, I like to program the Arduino Uno from the Arduino ...
-1
votes
1answer
31 views
AVR has no vprintf_P?
Well this was unexpected. AVR libc has many the variants of printf, including vprintf, but is missing vprintf_P. Is this really just not present or implemented elsewhere?
0
votes
2answers
30 views
Error on Arduino Code (unknown type name 'LiquidCrystal')
I am using Arduino IDE 1.6.8 and I am trying to compile the following code Wheatstone Bridge. I have currently a really weird error:
unknown type name 'LiquidCrystal'
This error seems to come from ...
0
votes
3answers
36 views
ESP8266 as WiFi for Arduino
I have a pretty simple project, where some data has to be read from a mySQL server. My idea is to do this with an ESP8266, and then provide that data to the Arduino Mega.
Is this possible or am I ...
