[Nut-upsuser] Any ideas what protocol GE VH3000 UPS might talk?

[gene heskett]

On 6/24/24 14:06, Phil Stracchino via Nut-upsuser wrote:
> On 6/24/24 12:50, gene heskett via Nut-upsuser wrote:
>> On 6/24/24 11:30, Jim Klimov via Nut-upsuser wrote:
>>> Curiously, they identify as |067b:2303 Prolific Technology| like a
>>> common USB-Serial dongle brand. Experiments with blazer and nutdrv-qx
>>> got no reasonable response from the devices.
>>>
>>> Jim
>>>
>> The cure Jim, is eliminate the prolific by replacing it with a FTDI
>> dongle.  Prolific has a bug in its wakeup, throwing away the first byte
>> rx'd. I threw mine into the out bin 2 decades ago. Was trying to use it
>> to talk to a cm11a for a heyu interface.  Failed miserably.  Encourage
>> owners to toss it and get the FTDI-usb<->serial which Just Works.
> 
> 
> THAT would explain a LOT of past issues with trying to use a Microsoft 
> DeLorme GPS receiver as a stratum-1 time source.  Unfortunately since 
> the Prolific chip was built into the device, replacing it with FTDI 
> wasn't an option.  (The worse problem, though, was that at the time, the 
> Prolific driver in the Linux kernel had a bug in it which prevented it 
> from ever being unloaded once loaded, which in turn made it impossible 
> to cleanly reboot.  I couldn't simply compile the driver inline because 
> it didn't get initialized properly unless loaded as a module.)
> 
> 
Agreed, Prolific was a pita...

Cheers, Gene Heskett, CET.
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