- o -

• open() : SerialPort
• operator bool() : DigitalPin< PinNumber > , EthernetClient
• operator uint32_t() : IPAddress
• operator!=() : EthernetClient
• operator=() : DigitalPin< PinNumber > , GPIOClass , IPAddress , SoftEeprom
• operator==() : EthernetClient , IPAddress
• operator[]() : IPAddress
• overflow() : AltSoftSerial