Frequency of publishing mesh message

[P Sumanth]

Hi,

I am working on BLE mesh using nRF52832. I am publishing custom BLE message in a group using generic client model. I am able to publish only one message for every 3 seconds using a timer. If I am publishing it less than 3 seconds, I am getting an error "device busy". How can i solve this issue, Is there any possibility to publish message frequently like for 1 second.

Regards

Sumanth

[Joakim Jakobsen]

Hi. 

I don't have much information about your application so it's hard to say what is causing this error. 

If you are sending a reliable message that isn't replied to, this message might occur. A reliable packet will be re-transmitted 3 times (configurable) before it's timeout. If you try to send another packet before this, you can get the Device busy error. 

Please take a look at this previous thread: 
https://devzone.nordicsemi.com/f/nordic-q-a/43897/how-to-use-nrf_mesh_evt_tx_complete-to-stop-device-busy-condition-mesh-3-1-s140-nrf52840 

Best regards, 
Joakim

[P Sumanth]

Hey,

I have found out the problem, From the above mentioned thread I got it and able to send frequently.

1. With out using NRF_MESH_EVT_TX_COMPLETE, If I am sending data less than 8 bytes, I am able to send message for every 1 second, If am sending data more than 8 bytes, it is taking three seconds to send data. How is the reliable packet re-transmitting timeout varies with packet length. Can I know how this is happening?? 

2. I am also facing one more problem i.e some times data is not received by other nodes even they are in near to sending devices

Regards

Sumanth

[Joakim Jakobsen]

Hi. 

1.

You can find more information in this ticket: 
https://devzone.nordicsemi.com/f/nordic-q-a/36389/mesh-unreliable-and-reliable 

2. 

Could you add some more information about this. How often to you miss packets? Are multiple nodes missing a packet sent from a single node? Are you sure that the packet is sent at all?

[P Sumanth]

For example take two nodes, node 1 is sending device and node 2 is receiving device. 

As you mentioned above I am sending message frequently for every one second from node 1, but node 2 is only able to receive for once in three seconds. The size of application data is 10 bytes, I would like to know how to receive the data frequently.