There are more than one "peripheral" and more than one central. How can we eliminate the signal confusion?

[purgoufr]

First I register the address of the central device to the peripheral device. When I work with a single peripheral device and a single central device, I can send commands from the central device to the peripheral device. But when I have more than one peripheral device in the vicinity, I can not send commands to the peripheral device registered from the central device. I think the signals are mixed up. Because, as I said at first, I can send peripheral commands to the central device when the peripheral devices are turned off and there is only one peripheral device. I used connectable undirected advertising. Because;

• Peripheral device should be scannable and connectable
• I send commands both by phone and by keyfob.

That's why advertising packet type should not be directed advertising as I know. When I scan by phone, I can see and select peripheral devices. But with KeyFob I do not have such a chance.If KeyFob is used, I think that KeyFob's head is mixed because I can not make a selection if there are more than one peripheral.

I read this link: devzone.nordicsemi.com/.../

So, do you have any suggestions to scan and connect to the peripheral which I want with KeyFob?

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I share sniffer pictures for information.

[FormerMember]

If there are multiple devices with the same address, I would think that there could be some problems, which device is the correct receiver of a given packet..? Instead of filtering devices based on address, I would recommend to filer on for example device name or UUID.

[Ulrich Myhre]

If there is a lot of advertisers around, all advertising extremely fast, they might end up transmitting exactly at the same time as a connect request is being sent to another device. That will corrupt the request, and manifest itself as a BLE_GAP_EVT_CONNECTED on the central, no change in the peripheral, followed by a BLE_GAP_EVT_DISCONNECTED with reason 0x3E (Connection failed to be established) on the central. If this is what you see, you can choose to retry connections or try to reduce/seclude the noise. This can be done by limiting the advertisements to certain channels for your devices (e.g. pick one randomly at startup), or by increasing the advertising interval slightly.