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Im a newbie here , i know why millis is used , but don't actualy understand how to integrete in my code now.
As additional info, this is my pro file in QT:

# Project created by QtCreator

SOURCES += main.cpp



INCLUDEPATH = /opt/arduino-1.8.5/hardware/arduino/avr/cores/arduino \
/opt/arduino-1.8.5/libraries/Bridge/src \
/opt/arduino-1.8.5/libraries/Esplora/src \
/opt/arduino-1.8.5/libraries/Ethernet/src \
/opt/arduino-1.8.5/libraries/Firmata/src \
/opt/arduino-1.8.5/libraries/GSM/src \
/opt/arduino-1.8.5/libraries/LiquidCrystal/src \
/opt/arduino-1.8.5/libraries/Robot_Control/src \
/opt/arduino-1.8.5/libraries/RobotIRremote/src \
/opt/arduino-1.8.5/libraries/Robot_Motor/src \
/opt/arduino-1.8.5/libraries/SD/src \
/opt/arduino-1.8.5/libraries/Servo/src \
/opt/arduino-1.8.5/libraries/SpacebrewYun/src \
/opt/arduino-1.8.5/libraries/Stepper/src \
/opt/arduino-1.8.5/libraries/Temboo/src \
/opt/arduino-1.8.5/libraries/TFT/src \
/opt/arduino-1.8.5/libraries/WiFi/src \
/opt/arduino-1.8.5/hardware/arduino/avr/libraries/EEPROM \
/opt/arduino-1.8.5/hardware/arduino/avr/libraries/SoftwareSerial \
/opt/arduino-1.8.5/hardware/arduino/avr/libraries/SPI \
/opt/arduino-1.8.5/hardware/arduino/avr/libraries/Wire \
/opt/arduino-1.8.5/hardware/tools/avr/avr/include \

Hey cyberpks,

I'm also trying to send data through ESP8266 with HTTP POST method and in JSON format and tried your above code but failed.

Can you please update the final code which worked for you.

Thanks :)
If we're using this type of blood pressure monitor, what are the materials that we need? Also what types of arduino are capable of using bluetooth. Sorry i'm a noob on these sort of things.

Our plan is to get the data from the bp monitor via bluetooth then send it to the arduino. That value will control the massaging speed of the massager.
Sensors / Re: Buttons are double reading
Last post by vagulus - Today at 07:19 am
Why don't you try it with the original example code (and with the switches properly wired):
Sorry about that.  Does this circuit look more like it?  :)
Project Guidance / code and wiring diagram for ar...
Last post by davo7627 - Today at 07:19 am
hi can anyone help me , I have decided to make a led message board with up to 6 32x16 led matrix boards run by Arduino uno . I am new as they come to this so I require some major guidance to get this to work . I have wired it up but are unsure if its right . does anyone have any wiring diagrams and codes I could try 
So a while ago I built a quadcopter with an arduino micro. They used a standard ESC to control the brushless motors. Using the servo library, I was able to vary a PWM signal from 1000us to 2000us to control throttle.

DShot ESC are the king in town for ESC protocols, but I am having some issues on finding out how to interface with them, and if an Arduino is even fast enough to do it. Thanks for any input.
Audio / Re: an 8192 sensors matrix sca...
Last post by TonyWilk - Today at 07:18 am
However, I do think their are better ways to detect a press position.
See my project:- spoonDunio
Nice... for some reason reminded me of the old Stylophone :)

And another better way to detect a press detection:

You could triangulate the press position on a surface by reading only 4 force sensors on the corners.

for multi-touch you could array this in grids of 100mm or something.

Other Software Development / Arduino Development on QT
Last post by firim - Today at 07:18 am

I am trying to setup a development environment on qt for programming on my arduino.
I can compile following code but when I try to run it I get "undefined reference " errors for the Arduino related method calls (like init(), pinMode() etc).

Apparently I have a linker problem. My project recognizes the header file but cannot link it to actual library.

What is the correct library to link against? My arduino (1.8.5) installation is under /opt in linux and has following high level structure:

Thanks in advance!
I don't think we know what the OP wants the end result to be.

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