Sub Ghz Solution

[Rohith]

What are the available solution in Sub Ghz RF.

Whether Nordic Sub Ghz supports Mesh topology.

[Roger Clark]

As far as I'm aware the only sub 1GHz Nordic product is the nRF9E5

However, I think it would be quite hard to write mesh software to run on this device as the spec says it only has

256-byte data ram

See http://www.nordicsemi.com/eng/Products/Sub-1-GHz-RF/nRF9E5

The Nordic nRF905 is the same device but without the built in MCU, so you could pair it with an external MCU e.g. I suppose you could use a nRF51822 as the MCU and not use the BLE. or use an nRF52832

Or use a separate MCU from another manufacturer.

But I don't think you will be able to do what you want with just one Nordic product

[RicFlair]

Does the RF51822 also operate within the Sub 1Ghz bands?

[Einar Thorsrud]

No, the nRF51822 only operates in the 2.4 GHz band. This applies to all nRF5x devices.