nrf52 development kit(pca10040) serial monitor shows garbage values.

[pd@learner]

Hi,

I am using pca10040 board of nrf52 dk. I am running battery level measurement code on board but whenever I observed values on serial monitor it shows garbage values.when i observed values on  nrfConnect App its shows correct values.

[pd@learner]

UART

[cbd]

If you are not using the UART via the board's USB, but instead via exposed jumper points then its possible that there is a mechanical issue e.g. long length of unshielded wire, incorrect voltage levels, lack of ground connection or TX/RX lines connected wrongly (TX to TX rather than TX to RX).