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.)
--
Phil Stracchino
Fenian House Publishing
[email protected]
[email protected]
Landline: +1.603.293.8485
Mobile: +1.603.998.6958
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