5.5.3 Query Digital I/O Port (QIO,<hex16>)

Format: QIO,<hex16>

Command QIO configures the pin as digital input and reads the input level of the pin in a single command execution. Command QIO reads multiple digital I/O values. It expects one input parameter of digital I/O ports to read. The input parameter is the digital I/O pin bitmap in the 16-bit hex format. The following table provides details about the I/O pin bitmap format. The response to command QIO is also a bitmap. If the corresponding pin to read is high, then the bit in the response is set; otherwise, the bit is cleared.