Best example project to adapt to my application? peripheral to peripheral connection with individual bonded centrals

RE: Best example project to adapt to my application? peripheral to peripheral connection with individual bonded centrals

GeorgeM — Sun, 22 Jul 2018 21:00:43 GMT

Hi Hung,

Decided to jump back on this.

So I've got a central and peripheral relay example gutted, and it's acting as a central to my other peripheral device. this central finds a peripheral name and waits until its rssi value is high enough to send a message to the host.

My issue now, is that I've added the BLE_UART example code (without changing anything) into it and while I am connecting I can recieve UART data but I cannot seem to send any characters to a phone. when debugging I can see that it is trying to execute a (ble_nus_string_send) but nothing shows up on the phone uart viewer. I'm not able to get any data over bluetooth it seems.

additionally the added blue_uart example code seems to have taken over my advertising and scanning, only whne i manually disconnect the ble uart connection from the phone does the program resume with central responsibilities.. you mentioned a scheduler above, is that something I have to be modifying to get it to have a simultaneous BLE uart connection as well as scanning for other devices?

Thanks Hung.

RE: Best example project to adapt to my application? peripheral to peripheral connection with individual bonded centrals

Hung Bui — Tue, 22 May 2018 08:09:20 GMT

Hi George,

Our softdevice will handle that for you. We have a scheduler inside the softdevice that can handle up to 20 connections at the same time. It's all automatic, just start advertising/scanning after you established a connection.

RE: Best example project to adapt to my application? peripheral to peripheral connection with individual bonded centrals

GeorgeM — Sat, 19 May 2018 13:55:31 GMT

Hi Hung, thanks for the quick answer, one quick followup though, If i have an open ble uart connection how does that impact the role of advertising and receiving at the same time? what function of the software handles the order of accepting and listening while a simultaneous connection is happening? i guess im a bit confused on if it's an automatic process or if i have to manually close other connections first before starting to scan or bodcast?

RE: Best example project to adapt to my application? peripheral to peripheral connection with individual bonded centrals

Hung Bui — Fri, 18 May 2018 10:26:23 GMT

Hi George,

I don't see any problem with your solution. You can find in our ble_central_and_peripheral examples we do similar task.

Another option is to use proprietary RF protocol (ESB for example) to connect between two devices. You can have BLE and ESB concurrently. You can have a look here. This is only needed if you find that you don't want to have BLE communication between your two device. For example, if you don't want to establish connection between two devices, or if you have several devices you want to communicate.