QWIIC ENDPOINT - No Differential comunication

Qwiic System
1

Hello All,

I’m using, for the first time, a Differential I2C Breakout board to test a circuit.

I have an I2C controller for a led Bar. I’m connecting the signals from the controller to a Qwiic Endpoint Breakout board and on the other side from the Qwiic endpoint board to the Led bar as presented on the image attached.

I can see the I2C signals on the input board but on the other side, there is nothing. On both boards, the PWR LED is on.

I haven’t changed any jumper configuration since I only have 2 endpoints and am supplying the board with 3v3.

Any idea about what am I missing here?

Thanks.

Best Regards,

BD

Connections.JPG
Connections.JPG994×509 52.3 KB

2

The endpoints are just that - the termination point of the bus.

Based on your wiring schematic, it looks like maybe you need 2x midpoint buses instead?

3

Thanks for the reply.

Since the purpose was to allow a greater distance between two devices on an I2C bus, why would I need the midpoint? I only have two devices on the bus and I assume that I would need midpoints if I wanted to add additional devices on the middle of the bus? Is this incorrect?

Thanks.