jiggermole - I'm glad this is working for you now. Thanks for reporting the issue so we could address it. I'm not familiar with the SCD30 but I was curious about the pads on the back - taking a look I can confirm that they are not in the correct order to be compatible with Qwiic.
The Qwiic standard puts four pins in this order:
- VCC (3.3V)
The pads on the SCD30 appear to be in the order:
Which is unfortunately not a simple rotation/mirror of the Qwiic specification. Therefore the only way to use a qwiic connector on those pads is to use re-route the pins as needed. You could, for example, use two of these Qwiic -> breadboard cables
to bridge the gap - just being mindful of what pins really go where...