nrf51822 Custom Hardware slow connection

[Luis Alberto]

Hi guys,

I have a custom hardware with the nrf51822 and we have a slow connection and services discovery is clearly slower that when we run the code in the Development kit (PCA10004 on a nrfgo motherboard). Our custom hardware uses the internal RC because it does not have the 32KHz external crystal (NRF_CLOCK_LFCLKSRC_RC_250_PPM_4000MS_CALIBRATION) We also use a wire as antena, besides that everything else seems to be the same as the PCA10004. Since the development kit works fast even with the RC enable, that makes me thing that must be something regarding the hardware, am I right?

[Aashish Patel]

Hi,

Are you running the same code you used on PCA10004. Then it should work fine else please check advertising interval and connection interval values that you are setting in your code.

Other than that I think wire antenna can also be an issue here (it must not be picking up lot of signals or must be picking lot of other signals). Try without wire, keep bluetooth device very close to the board if you are getting similar result , you can try with a proper antenna.