I2C question about pullup resistors

Are there pullup resistors on the Notecard I2C lines already? Or do they need to be added externally?

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Hey Pat, good question. There are pullups on the SDA/SCL lines of the Notecard, so you should be ok at the prototype phase using the pullups already on the board. If you’re looking to spin your own board for a pilot or deployment, we suggest putting a scope on the SDA and SCL lines of your design just to make sure the signals perform as you expect, and add additional pullups, as needed.

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