QWIIC JST connector orientation

Hi all. Just doing a sanity check on the correct keying of the JST connector. I’m trying to decide if I’ve got it right or have it exactly backwards!

I don’t have a good end-view of the keyed connector to reference to.

I’d appreciate a quick hand from someone who can set me straight!

Thx!

Jody

It’s reverse compared to what we do

In the image below the lower connector is oriented to plug face-up into a qwiic connector (from L to R: GND, 3.3v, SDA/blue, SCL/yellow), and the upper qwiic connector in the photo is upside-down (ready to plug into an upside-down board)

I took a photo of one in-use to illustrate a bit more as well

Thank you! I thought that might be the case. What the vendor’s stencil is calling pin 1 is actually pin 4 in the QWIIC standard then.

I just wasn’t able to find an end-on view of the connector with the pin functions called out. The connector is obviously keyed… but figured I’d check here - and you helped out! Thx again!

I’ve got them flipped around now. Here’s a pic that will hopefully help somebody out in the future.

Thx again for the quick help on this!

Jody

Right on - no problem! :slight_smile:

Hi Jody (@Jody_VE5-SAR ),

Sadly, I think you had it right the first time?

This is a vertical Qwiic connector, yes?

Here are photos of the vertical connector on our RTK mosaic-X5 PCB. It’s where we connect the OLED.

GND is on the left. From left to right: GND, 3V3, SDA, SCL.

I hope this helps,
Paul

Here’s the same part viewed in KiCad. Note the board edge is toward the bottom of these images. These images are rotated compared to the photos above.

Hi Paul,

Sadly, I think you are correct. Yes, it is a vertical mount SMD connector. Your photos exactly detail my situation - I think you understand the issue better than the original reply.

Thank you for posting - based on your thoughtful inclusion of the PCB footprint, I’m going to revert back to my original pinout.

Jody

No problem Jody (@Jody_VE5-SAR ) - glad I could help,

The SparkFun KiCad Libraries will be available for KiCad 10 in the next day or two. I have just submitted the Pull Request, asking KiCad to use the new release. It usually takes them a day or two to merge the request.

The part you need is the SparkFun-Connector:Qwiic_Vertical

Best wishes,
Paul