I was following the post above. I have a Grove RGB I2C LCD display that I wish to connect to a Photon. But I didn’t see where the the SCL and the SDA pins from the LCD connect to the photon?
Can someone help to help me understand how to hook up the LCD.
Do I really need to connect pull-up resistors to make it work?
Any help would be appreciated
@Geotek50, here is how you need to connect the grove to your Photon:
Red Vin (this is 5v USB power)
White D0 (SDA)
Yellow D1 (SCL)
You WILL need 4.7K or 10K pulllup resistors for both SDA and SCL lines. You will need to pullup to Vin (5v). You can try without the resistors to begin as it is unclear if there are pullups on the Grove board already.