I cut the SB40 bridge, then the Bluetooth throughput of the NRF5340 drops dramatically.

[Cong Ma]

Hi

I have successfully cut the SB40 and successfully used the power profile kit I  to measure the current with the following results

.
I then connected a jumper to P22 to re-measure the throughput between the two NRF5340 using the Bluetooth_throughput sample, but the throughput results are severely degraded with the following results. The led light is still on and the program is working fine. I don't know why this is happening? What should I do?

Is the hardware damaged?

[Susheel Nuguru]

If you have a jumber to P22 then then cutting solder bridge should not affect the throughput as they are then not related. This is to be something else that must have changed.

[Cong Ma]

So maybe it's a software issue? But I didn't change the code for SAMPLE. I don't know how I should try 。。。。T.T

[Susheel Nuguru]

> nrfjprog --recover

and then flash some other application than yours to see if it is the same behavior.

[Cong Ma]

Hi 

I have recovered it . Then I flash the peripheral_uart sample, it successed. Then I flash the throughput sample, It still does. Here's the board after I cut it up... could something have gone wrong?

I have no idea..

Many thanks

Cong

[Susheel Nuguru]

something seems to have happened to the kit after your test. I do not see any jumper on P22 in your image, I would suggest to do a quick test on other DK just to see if this DK is partially damaged.