I just threw together a 1P terminal server to give me
"console" access to one of my UPSs that doesn't have
a NIC.
I figure it would be a great "stocking-stuffer" for *next*
year -- inexpensive ($10 finished price?), small (so I
can mail them to colleagues), simple UI, etc. And,
above all, "convenient" to have on hand!
It's a low, average data rate application (the *port* is
slow even if talking 100BaseTX) so a tiny, cheap MCU/SoC
can handle the workload (the encryption is the most costly
process involved). Most of the code is network stack
so that's a no-brainer.
But, trying to sort out the worst case data rate is
an issue. Of course, 9600 is common. Replaced by 19.2.
But, I also see 115k in some places. Maybe settle for
230K and assume anything needing faster can find another
solution?
On 2023-12-25, Don Y <blockedofcourse@foo.invalid> wrote:
I just threw together a 1P terminal server to give me
"console" access to one of my UPSs that doesn't have
a NIC.
I figure it would be a great "stocking-stuffer" for *next*
year -- inexpensive ($10 finished price?), small (so I
can mail them to colleagues), simple UI, etc. And,
above all, "convenient" to have on hand!
It's a low, average data rate application (the *port* is
slow even if talking 100BaseTX) so a tiny, cheap MCU/SoC
can handle the workload (the encryption is the most costly
process involved). Most of the code is network stack
so that's a no-brainer.
can buy that for a few bucks yeah. https://www.aliexpress.com/item/1005006544010421.html
But, trying to sort out the worst case data rate is
an issue. Of course, 9600 is common. Replaced by 19.2.
But, I also see 115k in some places. Maybe settle for
230K and assume anything needing faster can find another
solution?
sometimes oddball rates are useful.
eg: DMX is 250K MIDI is 31K25
also you can do WS2812B 3 bits per byte at 250K 7N1
I came across something that was 1M, but I forget what it was.
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