nRF51422 Relay to Master Gateway / Router / Hop / Node

RE: nRF51422 Relay to Master Gateway / Router / Hop / Node

Petter Myhre — Wed, 17 Dec 2014 15:06:22 GMT

@NK: I do not. There is one example in the SDK, but I would rather use this example from GitHub (SDK6.1.0, S130 0.5.0-1). I also created a simple example that is advertising and scanning (SDK7.1.0, S130 0.9.0-1), you can find that here. And actually, we just release a new example that is worth looking into, ble_broadcast_mesh, found here. I haven't tested it though.

RE: nRF51422 Relay to Master Gateway / Router / Hop / Node

NK — Fri, 12 Dec 2014 18:44:12 GMT

@Petter: when you refer to investigating S130 for relaying with BLE, do you have any example code or documentation which might help with the same?

RE: nRF51422 Relay to Master Gateway / Router / Hop / Node

Saurabh — Thu, 04 Dec 2014 11:43:14 GMT

Thanks Peter. I thought as much. Was hoping to get the nRF51's in a range extender configuration with BLE Stack.

The application is a sensor network. You can visualize it as a lot like a WiFi network in a hotel with lots of Access Points (Range Extenders) and a Gateway/Router.

All the PC's connecting to the Wifi are analogous to the Sensors connecting over BLE.

More information about MQTT here if you're interested. I've managed to get this working over BLE UART

Thanks Saurabh

RE: nRF51422 Relay to Master Gateway / Router / Hop / Node

Petter Myhre — Tue, 02 Dec 2014 16:14:39 GMT

It is not the most commonly asked question :)

The nRF51422 is just hardware, you can do whatever you want with the radio. It can be used with BLE, ANT, Gazell or you can make your own protocol.

You need to investigate what protocol that is best for your application, both BLE and ANT can relay information. But they have different limitations in terms of security, complexity, power, latency, connectivity++.

You have a bunch of devices that is gathering information and you want to send it to a central. This can easily be implemented with both ANT and BLE. The devices should be able to operate for a good long while as long as the data amount isn't too big, or the real time requirements are too tough.

If you want all these devices to relay information from all nodes, to all nodes, this gets much more complex and much more power consuming, with every added node.

If you want to do relaying with BLE you should investigate SoftDevice S130. I'm not familiar with MQTT-SN.

I'm not sure how much more I can help you without knowing more about your application.