Hi, I have two urgent issues about nrf52832:

[big_johnson]

1. Is it reasonable easy to get a stable throughput over 1Mbps at a 3 meters range?
2. How much CPU resource is available at above situation? Or how many DMIPS is left at the above transmission situation.
Thanks a lot!

[Jørgen Holmefjord]

1. Yes
2. I recently did a test on nRF52840 using the ATT MTU Throughput example. The numbers will be very similar on nRF52832, as it have the same CPU. Other configurations will give different results.
   

   ==== Current test configuration ====
   Board role: tester
   ATT MTU size: 247
   Data length: 251
   Connection interval: 15 ms
   Connection length ext: on
   Preferred PHY: 1 Mbps
   GAP event length: 400

   Total: 1079.58 µs spent in softdevice per 15 ms interval (92.8% available CPU)

[big_johnson]

Thanks a lot for quick reply Jorgen！

Do you have the data about the situation of  maximum throughput, that is, about 1.3Mbps ? Or could you help get that data?

Thanks again!

[big_johnson]

I think this data is interested by many many users.

[Jørgen Holmefjord]

I did not check more than 20 ms of the transfer, but the CPU usage seems to be quite constant:

==== Current test configuration ====
Board role: tester
ATT MTU size: 247
Data length: 251
Connection interval: 320 units
Connection length ext: on
Preferred PHY: 2 Mbps
GAP event length: 400

[00:00:00.005,096] <info> app: Time: 6.376 seconds elapsed.
[00:00:00.005,126] <info> app: Throughput: 1315.82 Kbps.
[00:00:00.005,126] <info> app: =============================
[00:00:00.005,126] <info> app: Sent 1048712 bytes of ATT payload.

3658.86 µs spent in softdevice during 20 ms period checked, corresponding to 81.7% CPU availability.

[big_johnson]

Thanks！