using nrf connect to send advertising packets from a mobile phone

RE: using nrf connect to send advertising packets from a mobile phone

Einar Thorsrud — Wed, 15 Nov 2023 09:31:32 GMT

[quote user="Yahel_Wiliot"]Is there a way to transmit a longer advertising packet?[/quote]

Normal advertising packets can be up to 31 bytes (with 27 byte payload). With extended advertising you can get more (see this blog post for detail). But that will use secondary advertising channels. And the support for extended advertising differs for different phones.

[quote user="Yahel_Wiliot"]Also, I want to transmit the packets over a long time period, is there a parameter for this?[/quote]

When you start advertising you are prompted with a screen with some configurations, including advertising timeout (either select a timeout, or configure it to advertise until explicitly disabled).

Based on what you wrote initially it seems to me that you don't really need advertising at all, but just want to set up a carrier or similar for some testing? If so a phone does not seem like a suitable tool, and a simpler way would be to take a nRF5x DK of some sort, and use the radio test firmware.

RE: using nrf connect to send advertising packets from a mobile phone

Yahel_Wiliot — Mon, 13 Nov 2023 21:39:15 GMT

Is there a way to transmit a longer advertising packet?

Is there a way to change the delay between advertising packets?

Also, I want to transmit the packets over a long time period, is there a parameter for this? Because every time I turn the switch on it goes back to off after a few seconds

Thanks

RE: using nrf connect to send advertising packets from a mobile phone

Einar Thorsrud — Mon, 13 Nov 2023 14:02:19 GMT

Hi,

I suspect there may be a misunderstanding here. The 250 ms is not the length of the advertising packet, it is the delay between the advertising packets (advertising intervals). Advertising packets are short, and that may be why you have missed them on the spectrum analyzer.

A simpler way to test this (verify that it is advertising), could be to install nRF Connect on another mobile phone, and start scanning there, and see if you are able to see the advertising packets. (Or if you have an nRF52 series DK or dongle, you can test with nRF Connect Bluetooth LE or the nRF Sniffer for Bluetooth LE.)