NRF52832 S132 Max Notifications

[Pavan Kote]

Hi,

I am using NRF52832 based module. What is the maximum no of notifications we can send per sec. Is there any limit.

I am facing a issues on increasing the distance the transfer speed reduces. Is it right. or Time taken to transmit a packet reduces based on increase in distance.

[Karl Ylvisaker]

Hello,

I am using NRF52832 based module. What is the maximum no of notifications we can send per sec. Is there any limit.

Notifications are sent during the connection event, so the minimum time between notifications are 7.5 ms.
If you are curious as to the potential throughput with the different configurations, please see the Bluetooth Low Energy data throughput section of the SoftDevice docuementation - in general you can increase throughput by decreasing the connection interval and increasing the MTU size. However, be advised that bigger payloads are more susceptible to interference and corruption, and as a result they might require retransfer more often in a noisy / less-than-ideal environment.

I am facing a issues on increasing the distance the transfer speed reduces. Is it right. or Time taken to transmit a packet reduces based on increase in distance.

Yes, unfortunately with increased distance there is an increased chance that the packet does not make it to the receiver, or that the packet is corrupted by interference along the way ( and thus discarded upon arrival ). This will then trigger a re-transmit during the next connection interval, which in turn reduces throughput.

Best regards,
Karl

[Pavan Kote]

Hello Karl,

The above answer you provided is very valuable. As i know radio data transmit time depends on the environment. 

One more Query as we are using BLE which operates 2.4MHz which is also same as wifi also using 2.4GHz. Is wifi is there in our testing environment this also effects our data transmit time or throughput right.

If more obstacles means more transmit time it took right. 

Thanks & Regards

Pavan Kote