(A5)SCL32(A4)SDA31AREF30GND2913281227~1126~1025~924823722~621~520419~318217TX->116RX<-015A5/SCL14A4/SDA13A312A211A110A09VIN(7-12V)8GND7GND65V53V34RST3REF(5V)2NC1