TCP-Client

Today’s project is an intuitive display of the current temperature. With a single look, you can guess at whether it is sensible to take along a warm jacket. The RGB-LED on Pins D3, D5 and D6 Behind today’s door, there is another LED. This is a special one. It is an RGB-LED. RGB means Red, Green, Blue, the LED actually is made up of several LEDs with a shared cathode connection. A combination of the different colours with different brightnesses permits presenting almost any colour. The LED can be connected to the PWM outputs D3, D5, D6 of the controller with dropping resistors. ...

Today’s project uses the functions of the prior test to independently collect information from a website. The program specifically loads the current time from a dedicated website and thus sets the internal clock of the controller that is implemented by library. Behind today’s door, there is another resistor with 1 kΩ. All three resistors will be needed for tomorrow’s experiment. The program: Day9_TCPAutoTime While yesterday’s program still required mostly manual operation, today’s program works mostly autonomously. The controller connects to the website entirely independently: ...

In the last days, we mostly dealt with the UDP protocol with which data can be sent out simply and directly. In the next few days, we will deal with the TCP (Transmission Control Protocol). TCP only permits one connection at a time between precisely two computers. It is mostly used online for browsing on websites. Behind today’s door, there is another resistor with 1 kΩ (brown, black, red). As with all other parts: keep it safe, even though you are not using this part today yet. ...