Ive done alot with Modbus on arduino products interfacing with anything
that speaks modbus.
I have a server I que or add each thing I want to monitor or review.
Temps, Humidity power levels or presence of are the main ones.
On 8/19/20 11:26 AM, ch...@wbmfg.com wrote:
On one of my large portable air compressors, there is a data port.
They sell an adapter cable for about $200 It adapts it to USB. The
program that you use to talk to it makes reference to modbus.
The data port has 4 pins. RJ-10 4p4c connector.
+5 with enough current to light an incandescent light bulb.
+5 low current
+5 low current
Ground
This sounds like USB host to me. One of my sons think it is RS-485
I don’t think USB would be happy on a RJ-10 and utp wire. Maybe it
would. Maybe I am just buying a piece of wire with two connectors on
the ends.
The controller it plugs into is $2000 so I don’t want to experiment on
that. Be interesting to see the adapter cable when it gets here. See
if there are any active components. I would have probably just wired
it up to a USB and tried it if my son had not made the modbus/RS485
comment.
Any guesses?
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