Determine the signals of 2.4GHz transmitter of RC Car

Projects General Guidance
1

Hi to all members,

I am doing the project about Automatic Braking of RC Car. My purpose is that the RC Car stops in the dangerous distance (20cm, for example) using the Dual Ultrasonic sensor (HC-SR04), unable to forward to the object, but it can be reversed. Is it impossible to determine the signals (forwards, reverse, turn right and left) from the 2.4GHz transmitter - remote control? If yes, could you please show the components and useful links?
Because my project is to make the braking system, so I cannot change or the default receiver installed in RC car.

Thanks to all.

2

Is it impossible to determine the signals

Probably not, but technically very difficult. The radio signal encoding is usually proprietary and different for every manufacturer.

But what good would it do you to know?

If the braking is automatic, why would that information be sent out over the radio?

3

Thanks for your reply.

Because I am designing an external auto-braking system which is installed into the RC Car, so I cannot change default things belong to the RC car. Since I design a system, unable to forward to the obstacle, but it can be reversed when it recognise any obstacle. My thought is to resolve that request, base on the signal from the transmitter, so I can use the Arduino to control. Do you have any solutions or suggestions for this problem? Determining the signals seems to be impossible.

Thanks for your help

4

My thought is to resolve that request, base on the signal from the transmitter, so I can use the Arduino to control.

I don't understand this sentence. Do you want to have a separate transmitter that will override the operator's transmitter?

That would be extremely difficult, and perhaps impossible, because RC manufacturers go to great lengths to ensure that foreign signals do NOT interfere with proper operation.

An automatic braking system could simply cut the power to the motor.

5

It is not clear why you need to read the control commands from RC but it is possible and not very difficult to read the servo/ESC signals that come out of a conventional RC receiver. But they will need to be interpreted for each vehicle e.g. sometimes the steering is set up so that the signal for turn left in one car could mean turn right in a different car.

But there are many toy-level RC cars that do not use those conventional signals so it will depend on exactly what RC car(s) you are talking about.

Steve