Set radio range of node in ble mesh.

RE: Set radio range of node in ble mesh.

Pooja — Mon, 26 Mar 2018 05:23:49 GMT

Thanks tesc.

RE: Set radio range of node in ble mesh.

tesc — Fri, 23 Mar 2018 15:03:46 GMT

Hi,

You can send messages from any node in the network to any node in the network, as long as the number of hops to get between the nodes is less than the TTL. Maximum TTL is 127.

The range for direct communication between two nodes depends on many factors. It is similar to that of a beacon. I would say in most situations you will get a few tens of meters of range indoors, but again it depends. See this thread for more information: nRF52 and nRF51 (Beacon) Range.

Regards,
Terje

RE: Set radio range of node in ble mesh.

Pooja — Fri, 23 Mar 2018 12:50:29 GMT

i only need for testing purpose, beacuse while testing relay node there is need to place the device far from each other. From where i can download the mesh sdk 1.1

RE: Set radio range of node in ble mesh.

David Edwin — Fri, 23 Mar 2018 12:45:34 GMT

Mesh SDK 1.1 wll have support for the Mesh Proxy which will also support low power operation. Why did you want to "enable the radio when required", is this for low power operation or is it for something else ?

RE: Set radio range of node in ble mesh.

Pooja — Fri, 23 Mar 2018 10:40:52 GMT

At what distance radio range of single node reach in mesh network.

RE: Set radio range of node in ble mesh.

Pooja — Thu, 22 Mar 2018 04:02:20 GMT

Thanks for your response

RE: Set radio range of node in ble mesh.

Pooja — Thu, 22 Mar 2018 04:02:16 GMT

Thanks for your response

RE: Set radio range of node in ble mesh.

tesc — Wed, 21 Mar 2018 16:11:12 GMT

Hi,

Another option may be to simply cut the antenna cable or antenna itself. For development that should not be a problem, as long as you are happy with permanently decreasing the RF performance of the board. Also, if you use the DK you may try connecting to J1 either a bad antenna or just a cable.

For production testing you would have to decrease tx power, use a Faraday shield, or otherwise put the devices near out-of-reach. It is not possible to decrease tx power beyond the lowest setting provided through the APIs.

Regards,
Terje

RE: Set radio range of node in ble mesh.

tesc — Wed, 21 Mar 2018 16:04:18 GMT

Hi,

I can confirm that we do not yet have friendship in the current nRF5 SDK for Mesh (v1.0.1), although it is definitely a feature we will support in the future.

Regards,
Terje

RE: Set radio range of node in ble mesh.

John — Tue, 20 Mar 2018 13:44:20 GMT

When we've run into these kind of problems in test one option was to further attenuate the signals by using copper mesh faraday material over the devices, or you can buy RF resistive foam relatively cheaply and make a cheap RF isolation chamber by gluing pieces together into a cube.

RE: Set radio range of node in ble mesh.

John — Mon, 19 Mar 2018 13:44:24 GMT

Sounds like you want the Sleepy node with friend support for the mesh network. As of a few months ago this wasn't supported. Take a look at this: https://devzone.nordicsemi.com/f/nordic-q-a/28486/low-power-node-support-in-nordic-ble-mesh

RE: Set radio range of node in ble mesh.

Pooja — Mon, 19 Mar 2018 13:43:57 GMT

It doesn't return any error code the range is still too large.

RE: Set radio range of node in ble mesh.

John — Mon, 19 Mar 2018 13:40:41 GMT

Not sure what didn't work for you here. Did the function call return a error code, or was the range still too large for your test?

RE: Set radio range of node in ble mesh.

Pooja — Mon, 19 Mar 2018 13:37:45 GMT

It is possible for to enable the radio when required instead of keep radio enabled all the time?

RE: Set radio range of node in ble mesh.

Pooja — Mon, 19 Mar 2018 13:29:09 GMT

Thanks for your response. I have used the same method sd_ble_gap_tx_power_set but i didn't get any required result.

RE: Set radio range of node in ble mesh.

John — Mon, 19 Mar 2018 13:25:41 GMT

I do not believe you can specify a range for the radio. However, you can control the transmit power of the radio and therefore have some control over the range of the radio transmissions. Take a look at sd_ble_gap_tx_power_set in the file ble_gap.h.