How to send sensor data from multiple peripheral devices simultaneously to one central device

RE: How to send sensor data from multiple peripheral devices simultaneously to one central device

masterLee — Fri, 21 Jul 2023 08:23:34 GMT

Ok, Thanks for tagging me! Yes the first part is basically the same as mine I believe. I will read the post!

RE: How to send sensor data from multiple peripheral devices simultaneously to one central device

Tai — Thu, 20 Jul 2023 21:47:13 GMT

Thanks masterLee ! I actually separated my above plan into smaller chunks. The first one is to connect multiple peripherals to a central device which I believe it's similar to yours. I tagged you to my post and hope to receive any comments/suggestions on that. In case I can't find it, I added the link of my post here. Thanks!

Option for better throughput with BLE multi-link/multi-role - Nordic Q&A - Nordic DevZone - Nordic DevZone (nordicsemi.com)

RE: How to send sensor data from multiple peripheral devices simultaneously to one central device

masterLee — Wed, 19 Jul 2023 07:41:08 GMT

I haven't implemented the plan you mention so I will not be helpful. In order for the example to work all devices must use Nordic Uart Service (at least as far as I know). So you will need to test all your assumptions to be sure if they work.

RE: How to send sensor data from multiple peripheral devices simultaneously to one central device

Tai — Tue, 18 Jul 2023 16:05:17 GMT

Thanks for your suggestion, masterLee ! Following the reply from Sigurd in this thread, I also downloaded and successfully complied ble_app_uart_multilink central device. Here is my plan:

Having a board (e.g., nRF52840) acts as both central & peripheral mode so that it can receive data from 2 peripheral devices (e.g., nRF52832) and it can also send data to an IOS application.
For 2 peripheral devices, I have one with NUS server, and the other one with custom BLE service. In this scenario do you think I should update the latter using NUS server as well? Or I can keep it with the custom BLE service, and I still can let it communicate with the central device?

Any thoughts? I would much appreciate it. Thanks.

RE: How to send sensor data from multiple peripheral devices simultaneously to one central device

masterLee — Tue, 18 Jul 2023 08:22:22 GMT

Hi Tai, yes the project works as expected. No issues at all. I recommend you to check the following link and start playing with it. You will need at least 2 devices for start. One central with the firmware given in the following link and one peripheral with NUS service.

github.com/.../nrf52-ble-app-uart-c-multilink.

The central device "understands" peripheral devices that run the NUS service so it will filter out all other BLE devices i.e. headphones etc. Now, if you want to communicate with certain NUS peripherals you will need to find the device IDs of those peripherals and create a list of them in the central firmware.

RE: How to send sensor data from multiple peripheral devices simultaneously to one central device

Tai — Tue, 18 Jul 2023 02:50:10 GMT

Hi masterLee Hope you successfully finished this project without any major issues. I'm also looking for a potential solution to send data from multiple peripheral devices to a central device. Hope to receive any suggestions from you. Thanks!

RE: How to send sensor data from multiple peripheral devices simultaneously to one central device

masterLee — Tue, 14 Apr 2020 17:05:15 GMT

I will check them out. Thank you so much for your support! I will leave this post open for a few days in case I find some difficulty.

Best Regards

RE: How to send sensor data from multiple peripheral devices simultaneously to one central device

masterLee — Tue, 14 Apr 2020 17:02:52 GMT

No I haven't tried it yet because I didn't know where to begin. I will check it out. Thank you for your help and time!

RE: How to send sensor data from multiple peripheral devices simultaneously to one central device

Sigurd — Tue, 14 Apr 2020 13:17:45 GMT

Hi,

Both configurations are possible. The SoftDevice can support 20 concurrent Bluetooth Low Energy connections. We have a ble_app_multilink_central example in the nRF5-SDK.

You can also find a multi-link version of ble_app_uart_c in this github repo: https://github.com/NordicPlayground/nrf52-ble-app-uart-c-multilink

RE: How to send sensor data from multiple peripheral devices simultaneously to one central device

Bulhar — Tue, 14 Apr 2020 11:45:49 GMT

As far as I know it shouldnt be a problem (both configuration). It is just question of implementation of central device. The number of simultaneously connected device will be dependend on max number of connections which cenral device can handle. Did you have try UART Central example?