Gemma M0
Connect 3vo on the Gemma to 3V on the
TSL2561.
Connect GND on the Gemma to GND on the
TSL2561.
Connect A1/D2 on the Gemma to SCL on the
TSL2561.
Connect A2/D0 on the Gemma to SDA on the
TSL2561.
Feather M0 Express and Feather M4 Express
Connect USB on the Feather to VIN on the
TSL2561.
Connect GND on the Feather to GND on the
TSL2561.
Connect SCL on the Feather to SCL on the
TSL2561.
Connect SDA on the Feather to SDA on the
TSL2561.