On Mon, 08 Jan 2018 20:34:17 +0000, Kiwi User wrote:

> http://www.picaxe.com/AXE027
>
On reflection, this was a really silly suggestion because it only
provides a 3 wire serial connection (Tx,Rx,Grnd).

I know the OP's problem is now solved, but here are comments about other
gadgets I've run across and kept references to

I have no practical knowledge about the Nulsom NS-RS232, though I have it
bookmarked in case I need something like it.

However, there is another family of devices that could be useful in some
circumstances: Ethernet to RS-232 interconnects. These are self-contained
devices that connect a TCP/IP session to serial RS-232 lines

Gridconnect Xports are basically an enlarged RJ-45 socket that mounts on
a PCB and implements CTS/RTS signals. It is expected that you'll connect
it to an UART chip, so its really all about letting you use a Telnet
session to talk to legacy kit with a serial port. It has a built-in HTTP
and telnet servers.

The NEMO10  https://www.kanda.com/products/Sena/NEMO10.html is
functionally similar to the Xport but without the built-in HTTP server
(but they sell a cased server with a built-in web server).

Microcontroller DS203 Pros http://microcontrollershop.com/
product_info.php?cPath=98_284&products_id=1459 sell a plastic cased
module with RJ-45 on one end and 9-pin RS232 on the other.  It provides
similar functionality to the NEMO10.

Radicom's LSDB-200 http://www.radi.com/modular64.htm offers the same
functionality as the NEMO10 as an uncased module with RS-232, RJ45 and
power sockets.

None of these are amazingly cheap (the NEMo10 cased server and the DS203
are in the $100 range) but all offer interesting expansion paths because
an RPi can talk to several of them: plug a network switch onto the RPi
and it can talk to a serial device on every adapter that you plug into
the switch.


--
Martin    | martin at
Gregorie  | gregorie dot org

--- SoupGate-Win32 v1.05