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Re: battery tester

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On Thu, Oct 24, 2024 at 09:44:55PM +0100, Joe wrote:
> On Thu, 24 Oct 2024 14:10:53 -0400
> "Roy J. Tellason, Sr." <roy@rtellason.com> wrote:
> 
> > On Wednesday 23 October 2024 11:14:52 am Jeffrey Walton wrote:

[...]

> The CH340 is a well-known device, and the usbserial module along with
> something like cp210x should deal with multiple devices, assigning them
> ttyUSBx device numbers.

According to the logs posted elsewhere in this thread, that part is already
happening.

I doubt all that baud rate, stop bits and parity dance we know and love
from the RS232s of yore are necessary with TTYUSBs. We are talking to
an abstraction layer in the kernel anyway.

My hunch is at one protocol layer higher: the device is waiting for a
magic word to get things started. Kind of the AT protocol of those modems
(again, of yore -- rumour has it, tough, that baseband processors...),
which sit there, silent, waiting for an "AT" to which they then respond
"OK".

Cheers
-- 
t

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Thread

Re: battery tester "Roy J. Tellason, Sr." <roy@rtellason.com> - 2024-10-24 20:10 +0200
  Re: battery tester Joe <joe@jretrading.com> - 2024-10-24 22:50 +0200
    Re: battery tester <tomas@tuxteam.de> - 2024-10-25 07:20 +0200
      Re: battery tester Stefan Monnier <monnier@iro.umontreal.ca> - 2024-10-29 16:20 +0100
        Re: battery tester <tomas@tuxteam.de> - 2024-10-29 16:30 +0100
          Re: battery tester tomas@tuxteam.de - 2024-10-29 17:40 +0100
            Re: battery tester Stefan Monnier <monnier@iro.umontreal.ca> - 2024-10-29 20:10 +0100
            Re: battery tester Joe <joe@jretrading.com> - 2024-10-29 20:10 +0100
              Re: battery tester Charles Curley <charlescurley@charlescurley.com> - 2024-10-30 03:00 +0100

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