beacon detection speed in Wall environment

[Gerrit-Jan]

what is the detection speed, when the beacon enters into a wall unit area? With their 868 beacon they can detect in 0,2 seconds. Is the nRF51x22 in sleep mode and does it have to wake up when detected?

[Håkon Alseth]

Please correct me if my understanding of your question is incorrect. What you want to know is how long it takes for the nRF51 to send a on-air message when you enter a room? Since you mention beacon, I will assume you also want to transfer this over bluetooth low energy.

This will vary on the configuration and type of application this is. You can set broadcast interval down to 20 ms. The actual delay before your central device receives this packet will depend on the scanning interval of the central (phone/PC/etc), and it is hard to calculate on-the-fly.