You need to solder in a jumper as marked. The PCB has a bug/glitch where the WAS I2C level shifters aren’t getting 3.3V reference. I’d recommend it from the back side. @kazu
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You need to solder in a jumper as marked. The PCB has a bug/glitch where the WAS I2C level shifters aren’t getting 3.3V reference. I’d recommend it from the back side. @kazu