CodePudding user response:
Clock, data + power source and ground is ok,CodePudding user response:
The I2C protocol requires 2 wires, SCL clock line and SDO data line, SCL is the main equipment, SDA is a bidirectional line, two wires are OD/OC gate, need to go to pull resistance,CodePudding user response:
Only need two wires, SDA/SCLCodePudding user response:
Three lines, SDA and SCL, ground wire