MCP and phone visibility

[Ondrej Meca]

Hi,

We are developing weareble with nrf52832 and already made 6 test modules. Everythink works fine except 1 module. This wonderful piece is visible only on PC Win 10 (MCP or our custom testing app). But thats all, this device is not visible to phones or any other (Apple not tested). All modules are identical.

Any suggestions ?

Thanks for help. Ondřej Meca

[FormerMember]

It could be that the carrier frequency is not correct, that it is a little off of what is normally. Do you have a spectrum analyzer available? If so, you could disconnect the antenna and connect to the spectrum analyzer instead, program the radio_test example to the chip, and measure the center frequency for a given channel.

The load capacitors of the 16 MHz crystal affects the center frequency, you could for example double check that the mounted capacitors are the correct ones. The formula in section "Crystal and load capacitors", can be used to calculate appropriate value for the capacitors.