fix for devices with no d3s
fix for devices with no d3s

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