no battery status on M510 mouse about solaar

[pwr]

Register 0x0D is not valid for M510, however 0x07 appears to return a battery status.

Same behavious in Performance MX.

[Lekensteyn]

Register 07 also returns the battery status for the K800 keyboard. I have documented it at https://git.lekensteyn.nl/ltunify/tree/registers.txt:

Format: 10 DEVID 07   <battery level> <some magic> 00 00
(or: response to reading register, 10 DEVID 81 07   07 <batlvl> <magic> 00)
Battery level:
00 is not possible for battery level, when the keyboard went off because of zero
    power, 01 was still the reported value
01 - red zone
03 - one bar
05 - two bars
07 - three bars
Some magic:
00 - after unplugging/when not connected
25 - after plugging in USB power

Currently the return value is ignored. What about this mapping (I do not know the percentages, but the below seems the best we can get):

07 Full
05 Good
03 Low
01 Critical

I see there is a regular polling for register 07 within the GUI tool for the HID++ 1.0 keyboard device, can't the Battery notifications flag be used instead of plain polling? The logitech software definitely does not poll like this for batteries.

[Lekensteyn]

@pwr Do you have this mouse? Can you test whether it works for you or not?

[pwr]

I'm afraid not. I don't have any device that uses the 07 register.

[Lekensteyn]

Which devices do you own, are those all HID++ 2.0 devices? What do you think of maintaining a table somewhere with devices, their HID++ version and possible other attributes such as firmware/bootloader version?

[pwr]

Yeah, I was thinking of expanding the 'Supported Devices' section on the web page into its own separate page. Didn't get around to it yet.

[pwr]

I've confirmed in some older captures that I had that 0x07 is indeed the battery register used by M510. Should work now with the latest trunk.

[mattacc]

@pwr
I'm still experiencing this issue with Solaar and the M510. My Solaar version is 0.9.2 The battery level has never worked, Ubuntu 16.04

[Lekensteyn]

@mattacc does upower -d show the battery status for you?

[mattacc]

@Lekensteyn
mouse
present: yes
rechargeable: yes
state: unknown
warning-level: none
percentage: 0%
icon-name: 'battery-missing-symbolic'