The USB-to-UART cables sold for use by Arduino hobbyists generally have 0-5v logic levels,toggle quoted messageShow quoted text
not RS232. That thing on Oddwires I suggested in a previous post:
claims to be "USB to RS232", but I seriously doubt it. All I see is the SiLabs chip on it,
no level translators. Could be 5v logic levels, could be 3.3v, or could be configurable.
Claims to be suitable for use with both the Rasberry Pi (3.3v) or Arduino (5v).
These are nasty hardware details that everyone in the Arduino universe is oblivious to.
I have an old TTL-232R-3V3 FTDI cable I use,
since 3.3v and less is what most of electronics have gone for the last couple decades.
For use with the Nano, we should have the 5v logic level version, the TTL-232R-5v
FTDI is kind of the industry standard, note that the true Arduinos have the same FTDI chips.
Better yet, here's a newer FTDI cable that can be configured for either 5v or 3.3v:
Those FTDI cables are around $20.
FTDI clones and alternatives are now out there for $2 or $3.
If that's a real SiLabs chip on the Oddwires device it probably works fine,
though Oddwires hasn't bothered to fully describe what the logic levels are.
On Tue, Apr 10, 2018 at 09:18 am, Arv Evans wrote: