Bluetooth TX power level in advertisements

RE: Bluetooth TX power level in advertisements

Lukáš — Fri, 15 Jan 2021 16:50:44 GMT

Ok, was hoping to hear your thoughts about this or any practical experience. Nevermind.

RE: Bluetooth TX power level in advertisements

ketiljo — Thu, 14 Jan 2021 12:57:13 GMT

I'm afraid you must ask Apple about that. It's a static parameter that's set by the manufacturer. nRF Connect just reads the parameter and displays it. Or it can be interpreted incorrectly by the phone or app, hard to say. Eddystone and iBeacon do this differently as well.

RE: Bluetooth TX power level in advertisements

Lukáš — Tue, 12 Jan 2021 21:31:36 GMT

Well, from what I see they are advertising by using legacy advertising in BLE. And AFAIK FHSS is not possible during the advertising because of the limited channels. So any thoughts on how they might do it? Even if they could do 20 dBm then 24 dBm is over that limit. And why would Apple put false data in the TX power field? That doesn't make sense, we must overlook something.

RE: Bluetooth TX power level in advertisements

ketiljo — Wed, 06 Jan 2021 14:28:42 GMT

The power level is just a field and may not reflect the actual power. In Europe, max power for BLE is 10 dBm. But more can be used for classic BT (BR/EDR), up to 20 dBm as there are true FHSS systems.