Fastest server client communication?

Question

I wanted to make a very fast android app to communicate with my home server running on ubuntu.

So I have made something with json flask, TCP sockets and UDP sockets.

I want information about my network, temperature reading, log events, devices that I made, my LED strip and more in the future.

The thing is I want the response of the LED strip as fast as possible. But also get other information.

So that it feels very reactive. Also in the future I wanted to implement something with my phone's x,y and z sensors. This has also to be very responsive.

Can anyone help me out which tech or something else is good for this kind off application.

Thanks in advance

Answer 1

We have used UDP connection in the driverless metro project. It is very fast but not reliable. So you need to write crosscheck statements with it.

My advice and answer is;
You can use UDP and also create a header for checking process. For example 2 Byte header for network checking. We did this in the Big Driverless metro project.
You should send the data each time when the receiver catch the data.

Sample;

[ 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 ] <-- 1 Byte, 8 Bit 

0 --> Did receiver catch the data ? 
1 --> If receiver catch data, make this bit 1 and resend to the sender.
2 --> Receiver to Sender
3 --> 
8 --> Backup

You need to create a header byte data, and put your checking statements in it.

How to send temp

If you use UDP or TCP we can send ONU BYTE as a minimum data. Namely we can't send Bit. 1 Byte = 8 Bit

Sender to Receiver 1. Byte [ 0 Bit --> Get temperature information 1 Bit -->
2. Byte [ Free]

Send every second and listen the receiver maybe It sends the information we don't need to request anymore. Check Receiver' first byte' first bit. if its 0 keep sending if its 1 ohh receiver sent temperature information look second byte its temperature

Receiver to Sender Listen Sender, If sender sends data check first byte' first bit if its 0 doesn't care. If it 1 The sender requests temperature information from us. Send the temperature information to the sender. make first byte' first bit 1. make second byte temperature information.

1.Byte [ 0.bit zero or one] 2.Byte [ temperature inf]