add display text for CPM measurement
add display text for CPM measurement

bearing/dosenet-raspberrypi,yarocoder/dosenet-raspberrypi,yarocoder/dosenet-raspberrypi,tybtab/dosenet-raspberrypi,tybtab/dosenet-raspberrypi,cllamb0/dosenet-raspberrypi,bearing/dosenet-raspberrypi,cllamb0/dosenet-raspberrypi