On 3/11/17 9:15 AM, Charles Lepple wrote:
[moved to nut-upsdev while we figure out the protocol]
On Mar 9, 2017, at 11:22 AM, Drew from Zhrodague <drewzhroda...@zhrodague.net>
wrote:
I'm able to cat /dev/usb/hiddev0 and /dev/hidraw0 - I pipe this through hexdump
and I get different types of data from each:
I was trying to reconcile this with your earlier information from usbhid-dump,
and it looks like hexdump is swapping bytes:
Couple of updates:
[] I've spoken with one of the developers, and he's offered to share
some technical documentation with me. I'll report here with whatever I
can. He's on vacation in China.
[] I found this hid-example.c program, which fetches the values from
the unit, including a timer, and a current state. However, this example
program pushes data into the unit (to test writing), which sets the
timers to astronomical values. I am not sure the format it wants, I'm
unable to actually set anything, and the timer seems to default to 'a3
minutes'. My C is rusty, but commenting-out the writing portion makes
the data collection not work.
[] After unloading the hid modules, I was able to get more details on
the USB format, and I am trying to read documentation to understand
what's going on. From lsusb -vvv:
Report Descriptor: (length is 34)
Item(Global): Usage Page, data= [ 0xa0 0xff ] 65440
(null)
Item(Local ): Usage, data= [ 0xa5 ] 165
(null)
Item(Main ): Collection, data= [ 0x01 ] 1
Application
Item(Local ): Usage, data= [ 0xa6 ] 166
(null)
Item(Local ): Usage, data= [ 0xa7 ] 167
(null)
Item(Global): Logical Minimum, data= [ 0x00 ] 0
Item(Global): Logical Maximum, data= [ 0xff ] 255
Item(Global): Report Size, data= [ 0x08 ] 8
Item(Global): Report Count, data= [ 0x08 ] 8
Item(Main ): Input, data= [ 0x02 ] 2
Data Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position
Non_Volatile Bitfield
Item(Local ): Usage, data= [ 0xa9 ] 169
(null)
Item(Global): Logical Minimum, data= [ 0x00 ] 0
Item(Global): Logical Maximum, data= [ 0xff ] 255
Item(Global): Report Size, data= [ 0x08 ] 8
Item(Global): Report Count, data= [ 0x08 ] 8
Item(Main ): Output, data= [ 0x02 ] 2
Data Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position
Non_Volatile Bitfield
Item(Main ): End Collection, data=none
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 10
This is from the hid-example.c:
Report Descriptor:
6 a0 ff 9 a5 a1 1 9 a6 9 a7 15 0 25 ff 75 8 95 8 81 2 9 a9 15 0 25 ff 75
8 95 8 91 2 c0
I welcome any advice or assistance - ideally I'd like to use a proper
UPS software, rather than my own egregious use of bash. Thanks!
--
Drew from Zhrodague
d...@zhrodague.net
_______________________________________________
Nut-upsdev mailing list
Nut-upsdev@lists.alioth.debian.org
http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/nut-upsdev
