Ok, to clarify a few things about RS-485/modbus.
RS-485 is a multidrop, balanced, async serial bus, designed to run for
fairly long distances over a single 120 ohms twisted pair. General you're
going to have A and B which are the data lines (complimentary), and some
sort of third wire which is r
ilho...@wletc.com>
> *Reply-To: *AnimalFarm Microwave Users Group
> *Date: *Wednesday, August 19, 2020 at 4:19 PM
> *To: *"af@af.afmug.com"
> *Subject: *Re: [AFMUG] OT odd data connection
>
>
>
> Ive done alot with Modbus on arduino products interfacing with any
;af@af.afmug.com <mailto:af@af.afmug.com>" <mailto:af@af.afmug.com>>
*Subject:*Re: [AFMUG] OT odd data connection
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, Hu
ay, August 19, 2020 at 4:19 PM
> To: "af@af.afmug.com <mailto:af@af.afmug.com>" <mailto:af@af.afmug.com>>
> Subject: Re: [AFMUG] OT odd data connection
>
> Ive done alot with Modbus on arduino products interfacing with anything that
> speaks modbus.
>
ply-To: AnimalFarm Microwave Users Group
Date: Wednesday, August 19, 2020 at 4:19 PM
To: "af@af.afmug.com"
Subject: Re: [AFMUG] OT odd data connection
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 wa
ons, like remote start or
> remote loading.
>
> From: Cameron Crum <>
> Sent: Wednesday, August 19, 2020 1:57 PM
> To: AnimalFarm Microwave Users Group <>
> Subject: Re: [AFMUG] OT odd data connection
>
> Just curious what kind of data you need for an air compr
It is a way to get in and set parameters and options, like remote start or
remote loading.
From: Cameron Crum
Sent: Wednesday, August 19, 2020 1:57 PM
To: AnimalFarm Microwave Users Group
Subject: Re: [AFMUG] OT odd data connection
Just curious what kind of data you need for an air
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 portabl
Just curious what kind of data you need for an air compressor?
On Wed, Aug 19, 2020 at 11:51 AM TJ Trout wrote:
> apc uses rj10's for usb..
>
> On Wed, Aug 19, 2020 at 9:46 AM Ken Hohhof wrote:
>
>> Apparently modbus is a data protocol, not a physical layer standard, but
>> yes it could go over
apc uses rj10's for usb..
On Wed, Aug 19, 2020 at 9:46 AM Ken Hohhof wrote:
> Apparently modbus is a data protocol, not a physical layer standard, but
> yes it could go over RS485. I don’t see how a simple cable could convert
> from USB to RS485. I sure hope for $200 you are getting a dongle,
Yes, I actually found an old phone and was in the process of hacking up a
converter cable when my sons talked me out of connecting it.
From: Ken Hohhof
Sent: Wednesday, August 19, 2020 10:45 AM
To: 'AnimalFarm Microwave Users Group'
Subject: Re: [AFMUG] OT odd data connection
Apparently modbus is a data protocol, not a physical layer standard, but yes it
could go over RS485. I don’t see how a simple cable could convert from USB to
RS485. I sure hope for $200 you are getting a dongle, not an expensive cable.
The connector you are referring to, is that a 4 pin mod
The voltages make sense if it is TTL.
From: Brian Webster
Sent: Wednesday, August 19, 2020 10:34 AM
To: 'AnimalFarm Microwave Users Group'
Subject: Re: [AFMUG] OT odd data connection
MODBUS and RS-485 are very commonly related and used together. As I remember
RS-485 is just a f
I never noticed, but yeah the pinout for both looks identical. I wonder
if RS485 and USB have some shared heritage.
The converters are very small. It might be hard to tell the difference
between a slightly large plug package and a miniaturized electronic
package.without cutting it open o
MODBUS and RS-485 are very commonly related and used together. As I remember
RS-485 is just a format that goes farther distance than RS-232. This is/was
typical in SCADA systems. I don’t recall if it was TTL logic levels or not. I
would not be surprised if the cable is also a TTL logic converter
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