I'm using an ESP8266 from Waveshare (universal e-paper driver), with a Sparkfun battery babysitter. I'm finding that when an e-paper screen is connected to the ESP8266 via SPI connections (ribbon cable) - then the battery babysitter is not detectable over I2C, the moment the e-paper screen is discon…

I2C device not detected only when SPI device is connected

groundFungus September 14, 2021, 6:28pm 2

What all pins are used by the SPI display? What pins are used by I2C?

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