# BME280 sensor - issue with QWIIC connector? **URL:** \ **Category:** Support\ **Created:** [February 14, 2025, 11:48am UTC](https://forums.pimoroni.com/t/bme280-sensor-issue-with-qwiic-connector/27323 "2025-02-14T11:48:14Z")\ **Posts on this page:** 1\ **Showing post:** 3
**Author:** ![psmears](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/psmears/32/11464_2.png) [@psmears](https://forums.pimoroni.com/u/psmears)\ **Post date:** [February 14, 2025, 1:22pm UTC](https://forums.pimoroni.com/t/bme280-sensor-issue-with-qwiic-connector/27323/3 "2025-02-14T13:22:22Z")
OK just after posting I found this post with schematics, which suggests that measuring continuity between the GND on the QWIIC connector and the PCB pads may be affected by the reverse polarity protection: > [@BME280 No GND on QW/ST Cable?](https://forums.pimoroni.com/t/bme280-no-gnd-on-qw-st-cable/24173): > > I have a couple of BME280 PCBs, I am not measuring continuity between GND and the black V- wire on the QW/ST connector. All the other pinouts seem correct. Is there a known issue with this board? Is black not suppost to be connected to GND? Is it connected to anything else or am I able to just short them together on the board? Is there a schematic for this PCB available anywhere? EDIT: Turns out the Adafruit library for the BME280 uses a 0x6\* address, not 0x76. I made sure to pass the correct… I’ll investigate that angle and see whether that might explain some of what I’m seeing… Cheers, Patrick --- _[View the full topic](https://forums.pimoroni.com/t/bme280-sensor-issue-with-qwiic-connector/27323)._