SNIU049 May 2021 TMP126 , TMP126-Q1 , TMP127-Q1
The perforation between the USB controller board and TMP126 sensor board includes a footprint for a standard 100mil 4 pin header on each side. These pins are labeled with their functions on the board silkscreen, and can be used for either debug, or to provide electrical connection when the TMP126 and controller board need to separated for testing.