Can BLE Mesh be used to acquire multiple nodes' data in the same time?

[Ziyao Zhou]

Hi,

I want to synchronously get data from different nodes. 

Can BLE mesh obtain information from multiple nodes simultaneously? I would like the collected data to have good synchronization.

Thank you!

[Amanda Hsieh]

(updated)

Hi, 

It is not possible to receive from several nodes simultaneously, in general. This is physic. Devices mandate access to a channel to send something. If the channel is busy by another sender, there will be a collision. Could you elaborate on what you assume under these words?

Regards,
Amanda H.

[Ziyao Zhou]

Hi

If I have multiple nodes with same kind of sensors, I put these nodes into a group. I want to acquire the data in the same time.

I want the data can be simultaneously get so that I can study the relationship between each other.

Do you have any kind advice?

[Amanda Hsieh]

You can timestamp the data sent by nodes, receive it on the receiver node, and then use the timestamps to align the data. You can use Time models to synchronize the network with an accuracy of 20-100ms between nodes in a network. The time, then, can be used to mark the data. You will have to build your own vendor model using the data format you prefer.