connection latency from nRF5340 deep sleep to iOS 18

[Kirak]

I am trying to keep nRF5340 in sleep state, and wake it up when there's a user input (e.g., button) and send a packet as fast as possible to iOS18. What would be the latency for sending the first packet to iOS, including making a connection to the phone? We assume the device is already paired with the phone.

I asked the question to chatGPT and it says the bottleneck is iOS scanning, which may take a couple seconds, but I'm curious real measurements form experts:

https://chatgpt.com/share/e/68386486-e9ec-8002-af8b-7924ba4d6fe4

Thanks in advance!

[Sigurd Hellesvik]

Hi,

I asked the question to chatGPT and it says the bottleneck is iOS scanning, which may take a couple seconds, but I'm curious real measurements form experts:

Did you know that we have our own AI, trained on nRF stuff specifically, which may be more useful than ChatGPT for this:

I am trying to keep nRF5340 in sleep state, and wake it up when there's a user input (e.g., button) and send a packet as fast as possible to iOS18. What would be the latency for sending the first packet to iOS, including making a connection to the phone? We assume the device is already paired with the phone.

I recommend that you see https://academy.nordicsemi.com/ and specifically our Bluetooth Fundamentals course over there to learn about Bluetooth.

What would be the latency for sending the first packet to iOS, including making a connection to the phone?

It depends. What kind of sleep do you need?
Alternatively, how low current do you need from your sleep state and how often do you expect to wake up?

Regards,
Sigurd Hellesvik