I am working on an RC robot car that will be a camera on it and I want the camera to send the data to a small LCD screen, maybe a touch screen that is Arduino compatible. I have two ideas in my mind. The first one is to either use an analog video transmitter circuit and transmit video over that to an old analog tv/screen over the antennas. Or secondly, I might use the esp32 cam module on the robot and do something with that so that at the receiver side I have a board having a reviver Arduino and an LCD screen which gives me the visuals. I don't want to use a mobile phone to get a visualization but I have an embedded view. Which method would be better? Kindly suggest some methods on how to move it forward.
The best method is the one You where You know the most.
Put Oncle Google to work for different transmission strategies.
I suppose the rest of the bot is a peace of cake.
Standard Arduinos are not suitable for manipulating or displaying images, especially a live stream.
There is an example program for the ESP32-CAM that streams live images through WiFi to a browser running on any connected PC, which could be some very small linux module like the Raspberry Pi Pico W.
Inexpensive standalone camera/transmitter/receiver/display kits are available on line, for example for drones.
I believe that using the traditional method first will work better for you without any issues. Undoubtedly, the first analog video transmitter. Besides, I understand that Arduino works with C and C++ but modified to be even more user-friendly. The main problem I see is trying to use Arduino as a multitasking computer. It's a microprocessor, and I learned that Arduino reads the code line by line, for this use a while or break in the code, can easily drive you crazy
what if I use two esp32s one on each end? Basically, I want to use a TFT screen at the receiver end to access the data of the camera on the robot car. Dont know if I could find some code regarding that or not.
How far apart is the car with the ESP32CAM and the receiver and where are they located, indoors, outdoors, forest etc.
That is illegal in most countries, where in the world do you live?
Try thinking along the lines of FPV gear.
Plentiful, relatively cheap, works out of the box, and legal in most places.
Maybe not, I think it is totally legal, since I understand that he is going to work with an analog signal with purpose and for personal use between his private devices, another thing would be to transmit at an industrial level for advertising, political and economic purposes for other devices that are not yours, but by streaming personally and privately to your personal devices I think it's totally legal. but without a doubt, he will have to have similar criteria when flying a drone, avoiding disturbing as little as possible and seeking to do it in the safest and most annoying way for others.
Approx 500m
But how do i screen it on an lcd. I don't want to use a phone for this purpose
"and where are they located, indoors, outdoors, forest etc."
Indoor
You are totally wrong about this. Without a license to use these frequencies it is illegal. It matters not what you do with the signal.
The old analogue TV frequency band has been reallocated to other purposes, and you would be causing interference to those services, so there is a good chance you will be noticed and tracked down. There are hefty penalties for this in both the US and the UK and EU, as well as most developed countries.
Are you sure you mean "most annoying way"?
So you have a 500 m in door space? Is it an aircraft hanger?
What you are commenting on is true, it is illegal because you can disturb the other frequencies, but I do not know the regulations in the US, in Europe I think it is illegal but up to X point, for example, drones, it is illegal, yes and no (it really depends on the use to do). I suppose that the regulations for it to be illegal would only apply if it passes many meters.
" I am working on an RC robot car that will be a camera on it and I want the camera to send the data to a small LCD screen, maybe a touch screen that is Arduino compatible "
I understand that the transmission will be short-range and for personal and private use, as well as temporary at most 10, 15 meters.
Now if you tell me that you want to transmit the signal from a building to the other end of the city, absolutely and without a doubt it is something illegal as you have commented and also a crime.
In doubt, the best thing would be to check with local regulations, either through a web page on the internet or a telephone, here we have numbers to call, for example, 012 citizen service that can help and inform you.
I believe that its illegality will depend on the use it makes, just like a drone, it depends on the use it makes to be illegal or not.
Quite clearly it is legal for drones. This is because commercial drones use a license free band and use type approved equipment. Do you know what that means?
No.
You are talking absolute rubbish.
Where did you read that from? Can you provide a link?
A lot of people also believe in a flat Earth, that doesn't make it true.
I have verified something but it is something very complicated, the shortest thing I see is this.
In Spain it is convenient to know in which frequencies we can transmit our video and radio signals: 900MHz: It is not legal in Spain so it cannot be used. 3 GHz: Only allowed in Spain with a radio amateur license. 4 GHz: In Spain it is the most used frequency in stations.
(Some official documetation here) : last modification 12/06/2023
I leave an image of what the current system is like in Spain, but I don't really understand.
You are right.
It's seems that it is illegal 
Sorry
Thank you.
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