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. 2023 Jul 27;23(15):6739. doi: 10.3390/s23156739

Table 1.

Grove connector pinout.

Pin Digital Analog I2C UART
1 D0 (Primary input/output) A0 (Primary input) SCL (I2C Clock) RX (UART Receive)
2 D1 (Secondary input/output) A1 (Secondary input) SDA (I2C Data) TX (UART Transmit)
3 VCC (Power for Grove Module, 5 V/3.3 V)
4 GND (Ground)