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1

It depends on MAC Address (or more correctly, BDADDR) type. See Core V.5.2, 6.B.1.3.2. In BLE, there are two kinds of addresses: Public, that are IEEE-allocated as per IEEE 802.3 MA-L (ex OUI) registry, Random, that are not uniquely allocated at all. In turn, Random addresses may be: Resolvable, they are short-lived and renewed periodically with some ...


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I would connect the VNA to J3. It make it easier to perform measurements, and you can calibrate for the cable's length. From your post, F1's input is not 50Ohm, so you can't connect directly to your device output. J3 will allow you to orient the cable, to get optimal measurements. The trace delay at 2.4GHz is negligible for BT.


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But if the data stream is same for 5 devices can they all recieve it at the same time like standard FM? If your antenna emits in all directions (as per a quarter wave monopole) then once the EM field is created, any receiving antenna can receive the signal from any direction and multiple receiving antennas can do this simultaneously. This is slightly ...


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Your speaker wire is an antenna that picks up the 60Hz from electricity that is all around you. Your + input pin 3 on the opamp has no bias voltage that should be about half the 5V supply. If you look at ECG Amplifier in Google then you will see an instrumentation amplifier (with 3 opamps inside it) so that it has differential inputs and any noise on the ...


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...without them interfering with each other Two. Bluetooth devices change their communication frequency at about 1600 times per second. That is on purpose so that it is less of an issue when there is interference on some channels. Bluetooth is designed with the assumption that data packets will get lost and have to be re-transmitted. When only two devices ...


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The inverted F antenna on many ESP modules is tuned for the band used by the module and can be de-tuned by other material in close proximity. space the antenna away from the material to avoid this effect. 10mm is probably enough.


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Yes it is ok, why wouldn't it be? Example is a cc2640 BLE chip from TI - here you can read the BLE MAC assigned by TI either by JTAG and Flash Programmer 2 or via the GAP protocol in software GAPRole_GetParameter(GAPROLE_BD_ADDR, ownAddress); What security risk would it present ? This is the information I get when I look it up. Result for: 54-6C-0E-A0-...


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Yes Take care to avoid data collision Make it half duplex to ensure you will miss any data or receive garbage data. Example 1 here , first result in search result.


2

Is there a way to experimentally find out the power requirement of a speaker? That's less of a required than a maximum values. Go higher than that, and you damage the speaker; that's an easy experiment, but not very useful to you, unless you have spare speakers... The rated impedance is 3 Ω … can support 4 Ω and 8 Ω speakers Well, that's what ratings ...


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Sounds like a ground loops and or a missing output capacitor. When the bluetooth module stops playing for x seconds, it turns off its output, so it stops actively driving the output jack. So the line starts floating and picks up the noise from the charging module. You can try a 10 uF ceramic capacitor in line/series on each of the left and right output, to ...


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