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nRF51822 to nRF51822 proximity buzzer help

Hi,

I am new to nRF5x BLE devices.

I need to create a project and would like you to help me out.

I need to connect two nRF51822 devices. If one of the devices goes away from the proximity (5m) one of it beeps with a buzzer. (No app control required)

Just like a car key fob. If you take the key 5m away from the car it should beep.

How can I do this?

  1. Can I use arduino IDE for this?

  2. what is the easiest way to program it?

  3. How do I code it?

    1. One will advertise/transmit data/location.
    2. The other module will keep on checking the distance and if the distance exceeds 5m (signal strength, db etc) it should beep.

I clearly have no idea, please help.

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