Any portable short range transmitters and receivers device

Projects General Guidance
1

My aim is to trigger other functions once the sensor sense the signal from transmitter tags

Range : around 2 meters

The transmitters should be small and portable, while the sensor should be 1:n transmitters

My sensor device should be automatic and not connected with PC, except the first time set up, and it is attached to wall

I do some research on bluetooth and active RFID tags,
yet bluetooth seems do not have any code for detecting exist device and then trigger other functions, connection is not needed, and biggest problem is it has to be done in AT command mode manually connecting PC.

Active RFID seems to be a solution, but i wonder if an arduino RFID sensor such as nRF24L01 -2.4G can successfully detect and recognize a 2.4G portable active tags, and if yes, any set up code for reference?

Now is only a starting stage of my project, if there is any better types of transmitters and sensors, plz recommend to me!!! Thank you for ur help!!

2

nRF24L01 is not RFID. It's 2.4Ghz, but not RFID protocol - nRF24's can only talk to other nRF24-based devices.

3

i see, thank you, do u have any model of active RFID tags and receiver that adaptable in arduino suggested?

4

A network of NRFs should be able to do this. It should be just a matter of responding appropriately to a prearranged signal.

I think bluetooth may be able to do this, perhaps by simply using the STATE pin, which I understand is programmable. It would have the advantage of being able to stand alone, but is probably restricted in its use. There are other programmable i/o pins on the HC05 that may be worth a look.

5

laushv:
My aim is to trigger other functions once the sensor sense the signal from transmitter tags

That sounds like the sort of thing BLE was designed for.

Sorry, I don't have any experience using BLE. Also note that a HC-06 is NOT suitable for BLE.

I suspect the system could also be implemented fairly easily with nRF24 modules - especially if the sensors do not need to transmit data very often.

...R
Simple nRF24L01+ Tutorial