Hello,
Although this topic seems to be trivial and touched many times it seems to be difficult find any ready to use products / projects about it.
The Background
Lets look at UART communication based Bus networks like ModBus. There RS485 driver is used and twisted pair communication binds up to 240 devices into one bus network. It works very well, is robust and lots of legacy reusable work is available on the world. In the ModBus case one master talks to many slaves over the single twisted pair cable. The master initiates communication by sending a command to slave and will receive response from the slave. Slaves are silent in other times.
The Problem in Background
To build RS485 automation into buildings has to be made during major reconstruction or during construction of new building. It is also possible to place wires while the rooms are already in service but then the visual appearance will suffer. Thus if there would be a way to also append wireless connectivity in parallel to wired connectivity, then it would be much more easy to extend the functions of the automation while the rooms are in service.
The BT Mesh Solution
As many questions in this forums suggest - there is lots of work going on to solve similar situation where Bluetooth Mesh is used to transfer data from uart to uart over bluetooth mesh. The requirement may sound like: "A byte transmitted into one BTMeshUART device will be received from all other BTMeshUART devices". All UART based communications also place requirement of timeouts of silence while telegram is transmitted. Usually the telegram is good when one byte follows another without extra stop bits or idle bus. Thus another requirement may sound like "Up to 256 bytes of continuous UART transmission must be possible". And ofcourse the pairing and security that come along with bluetooth protocol must be there.
The best match for the above that I have found is 1 to 1 UART connection over bluetooth.
The Question
Do you have references to modules or projects for Nordic SoC-s that perform N to N UART connection over bluetooth?
