If you are OK for RS-232 serial protocol, there is this:
and these:
One of them is a USB to RS-232 device making a connection to a system (or a
Raspberry Pi, Arduino or other microcontroller simple (well, maybe simpler;
there are RS-232 boards for the microcontrollers). Plenty of online support
and open software for the microcontrollers as well.
I have no CoI with any of these suppliers or manufacturers. A friend of
mine used something like this to connect a remote terminal (not a computer
- just a terminal) in an outbuilding to the computer in his house. It was
basically like having a hard-wired connection between the two.
Steve H.
On Tue, May 31, 2022 at 20:05 Ed Breya via groups.io <edbreya=
[email protected]> wrote:
Up at the farm this weekend I discovered that the water pump had been
running all the time for who knows how long, overflowing the storage tank
and wasting electricity. Normally, the level is controlled by a Clay valve
at the tank, which is a float actuated pilot valve that just shuts off the
flow, and the pump control end senses the stall pressure and shuts it off.
There is no electric power available at the tank, some 400-500 feet away
from the house and water pump. I rebuilt the valve a few years ago, and at
that time I started looking into remote communication, figuring to build a
simple system with a small solar PV panel and SLA battery for power at the
tank, a float switch, and some kind of ISM transceiver set to span the
distance. I even found some good candidate TXRX modules online, but they
now appear to be long obsolete and not available anymore. These were nice
and simple, with just a few data lines that could be set at either end, and
replicated at the opposite end. I revisited this a couple years ago, and
couldn't find anything like what I wanted - only fancy ones like for
internet protocol and such.
Does anyone know of any good old fashioned simple signalling module sets
(that are available) that would do the job? The simplest would be just
half-duplex, even one bit OOK, to say for instance, "water too low, turn on
pump." More bits and full duplex would offer more control options and
status monitoring. I don't want any PC or uP stuff involved - just
something that runs when turned on, and conveys the bits, for this very
simple operation.
For now, I've had to shut down the pump, and next time up here will look
at fixing the valve again, so it's time to find something I can put
together fairly quickly and get the electronic RC option going.
Please reply off-list only.
Ed
