Home#include <lua/gpio.lh>
gpio.info(group)SYNOPSIS
DESCRIPTION
Query information about a gpio group. The group is either one of the GPGRP_xxx values defined in lua/gpio.lh or a registered ID used with gpio.register().
The result is a table with information about the group or device. A field is only present in the table if that information is available.
| parent | The parent group number. For example GPGRP_MUPP for multi-io devices talking MUPP protocol. |
| address | The address on the bus. |
| device | The serial device where the bus is attached to. |
| state | Either "up" or "down", indicating if the device is responding. |
| type | A code number indicating the type of the device. |
| capabilities | Capability flag bits. |
| version | Version number of the device firmware. |
| name | The type name of the device in UTF8 encoding. For example "eemio" or "µMIO". |
RETURN VALUE
On success, returns a table. On error, three values are returned: nil, a string
describing the error (The result of the C library call strerror() on the errno code) and the errno number from
the standard C library.