Communication Between Device nodes.

RE: Communication Between Device nodes.

Petter Myhre — Thu, 28 May 2015 08:57:36 GMT

I can't see anything wrong with it, but it sounds similar to my solution, only that you are using 7 channels in each device instead of 8. I believe the current consumption would be similar(but I'm not sure). I guess you are using the shared address to identify the devices instead of device number? Acknowledge Data Type will increase the current consumption, but if this is something you need, then you need it.

RE: Communication Between Device nodes.

Ankit — Thu, 28 May 2015 08:50:32 GMT

Thanks again for the clarification. It cleared my doubts. Also, if possible, please provide your valuable comments to my answer, posted below.

RE: Communication Between Device nodes.

Petter Myhre — Thu, 28 May 2015 08:17:24 GMT

Channel 7 on one device has nothing to do with channel 7 on another device. The channel number only means something in the device it is assigned. So you assign one master to one channel, in each device.

RE: Communication Between Device nodes.

Ankit — Wed, 27 May 2015 12:32:40 GMT

An alternative solution to the above network of 8 devices, acting as peers to one-another, is using 8 Shared Channels and Acknowledged Data Type.

In each Shared Channel, one device will be assigned as the master and the rest will be the slaves. The master will transmit the data with a "shared address" on the next channel period. All slave nodes receive and use this message to maintain synchronization, but only that slave node will actually receive the data which has the same "shared address". That Slave node has the option of sending data back to the master (i.e. in the reverse direction). No other slave node can transmit data to the master. It is also described on Page No. 27 of "ANT Message Protocol and Usage, Rev 5.1" pdf.

In this way, whenever a node wants to transmit data, it will transmit on its corresponding Shared Channel, where that node is the master and rest are the slaves.

RE: Communication Between Device nodes.

Ankit — Wed, 27 May 2015 12:31:06 GMT

Thanks for clarifying your answer. But, as is mentioned in your answer, does that mean we can assign "many masters on a single TX only channel"? Also, please have a look at an alternate solution that I've posted below, and please let me know if there is something wrong with that approach. Thanks for your guidance.

RE: Communication Between Device nodes.

Ankit — Tue, 26 May 2015 06:08:54 GMT

Hi Petter. I am currently trying to implement a network based on the above specifications that you described. But, I don't think that all the devices would be able to send data in this network. Since you are providing 1 master "transmit only" channel, only 1 device would be able to send data and the other devices will only receive data, through 7 slave "receive only" channels. Or, am I interpreting your answer differently? If so, please clarify.

RE: Communication Between Device nodes.

Petter Myhre — Thu, 06 Mar 2014 14:27:35 GMT

This is one way of setting up a network of maximum 8 nodes, with unique device numbers. Using broadcast as data type.

Set up one channel for transmitting, for example channel 7, on each device. This should be a master transmit only channel, and the channel should be configured with the unique device number.

Set up seven channels for receiving, for example channel 0-6, on each device. These should be slave receive only channels, and have all parameters as wildcards (if you don't want anything else).

If you need to know which node is sending the data, the unique device number should be included in the message, either in in the payload in the standard data message format, or by using flagged extended data message format or legacy extended data message format.

Hope this covers what you were after, please let me know if anything is unclear or if there is anything else.

Edit 27.05.2015: Clarified transmit channel, and receiving channel.

RE: Communication Between Device nodes.

Petter Myhre — Thu, 06 Mar 2014 13:58:54 GMT

You configuration is not reducilous. But I still don't understand what you want to do. You say you want communication between two nodes? Which two nodes?

RE: Communication Between Device nodes.

Chongchun Moon — Wed, 05 Mar 2014 17:13:07 GMT

Hello Petter,

It is possible many nodes(<10) exist in the network. However, Basically, Communication happens between two nodes.

And yes, All nodes need to send data and receive data. First problem is they don't know existence each other. That's why I have configured devices as above. Is it ridiculous? :)

After they recognizes existence of each other, They will send and receive what it wants to be transferred data.

RE: Communication Between Device nodes.

Petter Myhre — Wed, 05 Mar 2014 16:24:22 GMT

How many nodes are you planning to have in your network?

Do you want all nodes to send data, and all nodes to receive this data?