How long does it take to send a Mesh message?

RE: How long does it take to send a Mesh message?

Edvin — Thu, 17 Jan 2019 11:31:37 GMT

Yes. That is correct. Plus a bit time for changing between RX and TX and back to RX. Of course, this switching is not transmission time, but that is the window that the transmitting node will not be able to listen for incoming packets.

BR,

Edvin

RE: How long does it take to send a Mesh message?

Jan — Wed, 16 Jan 2019 15:29:07 GMT

Hi Edvin,

Thanks for your quick answer. So, if I am reading the graph correctly, the radio time is less than half a millisecond?

Jan

RE: How long does it take to send a Mesh message?

Edvin — Wed, 16 Jan 2019 14:43:43 GMT

Hello Jan,

The mesh messages are based on BLE advertising packets, which are packets up to 31 bytes long. Since parts of the packet is used for headers, and you remain with 0 to 10 bytes of payload, the packet is approximately 20-31 bytes long.

To see how long an advertising pack is, you can check out the online power calculator:

https://devzone.nordicsemi.com/power/

And set the payload between 20 and 31 bytes, depending on how much payload your messages has. Note that the graph presented is showing advertisements on all three advertising channels, while the Mesh network is only on one channel, so you only need one of the three spikes.

Best regards,

Edvin