Serial to Ethernet Modules - Page 1
Forum section: electronics / projects

author: rcbuck
author_rank: Frequent Contributor
timestamp: September 28, 2016, 12:43:59 am
content: Has anyone had any experience with either of these two modules?http://www.ebay.com/itm/USR-K1-RS232-Serial-to-Ethernet-Converter-TCP-IP-Module-UDP-and-TCP-Client-Mode-/272280016898?hash=item3f65275802:g:MOcAAOSwPcVV3Atihttp://www.ebay.com/itm/Ethernet-toTTL-RS232-Serial-TTL-to-TCP-IP-RJ45-Converter-Transmission-Module-M-/182257405348?hash=item2a6f634da4:g:2HQAAOSwOdpXz8PnI am looking for a simple solution of RS232 (actually MCU TTL) to Ethernet for remote control purpose.

author: rstofer
author_rank: Super Contributor
timestamp: September 28, 2016, 01:31:11 am
content: I sure wish they wouldn't say RS232 when they mean TTL Serial. Not only are the voltages different, the signal levels are inverted.The seond item supports 3 clients as a server. The first item doesn't mention multiple connections - or I missed it. This is kind of important for what I might want them for but it may not matter to you.

author: LabSpokane
author_rank: Super Contributor
timestamp: September 28, 2016, 01:45:06 am
content: http://www.mouser.com/ProductDetail/Lantronix/XP1002000-05R/?qs=sGAEpiMZZMtNlGR3Dbecs7OYS22gSyXFI7DNiIa86zo%3dThe Lantronix is the brand-name version of what you found. They work well, but are correspondingly expensive.

author: ebclr
author_rank: Super Contributor
timestamp: September 28, 2016, 01:52:40 am
content: This add have a litle more information to help you decidehttps://www.aliexpress.com/item/Q008-USR-K2-Serial-Port-TTL-to-Ethernet-Lan-Module-with-RJ45-port-WEB-DHCP/32631420152.html?spm=2114.10010108.1000023.4.ljFhsx

author: rcbuck
author_rank: Frequent Contributor
timestamp: September 28, 2016, 06:34:28 am
content: Guys, thanks for the replies. Yes, I agree their RS232 reference is a little misleading and could confuse a beginner. I will be using a PIC to drive the unit so TTL is actually what I am looking for.I was trying to replace a Lantronix XP1001001-04R (which is no longer made). I'm guessing the XP1002000-05R replaced the 04 unit. I do not need multiple connections as it will be a one way transmission from one endpoint to another.One thing I am concerned with is the fact that the USR-K1 and USR-K2 apparently do not come with an embedded MAC address. Apparently only the USR-K3 has the MAC address. It is about double the cost of the K1 unit but still less money than the Lantronix unit by a long ways.Has anyone actually used one of the units? If so, how difficult is the setup? If I am reading and interpreting the data notes correctly, only the K3 has a web setup page. The other two have to be setup using AT commands.

author: ebclr
author_rank: Super Contributor
timestamp: September 28, 2016, 08:34:51 am
content: All have Mac address ( fixed ) K3 you can customize or use your own number

author: LabSpokane
author_rank: Super Contributor
timestamp: September 28, 2016, 01:25:24 pm
content: If security is an issue, the AT command-only setup is the way to go. I never liked the idea of a web server on the XPort.

author: rcbuck
author_rank: Frequent Contributor
timestamp: September 28, 2016, 06:23:57 pm
content: Thanks ebclr and LabSpokane. I'll order a couple of the K1s since they have a mac address and I have no need for the web interface.

author: Pack34
author_rank: Frequent Contributor
timestamp: September 28, 2016, 09:23:36 pm
content: I've always been a fan of the ENC28J60 modules.There's a fair amount of canned code for this style transceiver.https://www.sparkfun.com/products/765

author: garboui
author_rank: Regular Contributor
timestamp: September 28, 2016, 09:33:06 pm
content: I assume you are looking for wired but, I've evaluated these for a wireless application back in the fall.The AT command set is simple and once a socket is configured they are basically serial over Ethernet. The price is decent in quantity as well.http://www.st.com/content/st_com/en/products/wireless-connectivity/wi-fi/spwf01sa.html

author: rcbuck
author_rank: Frequent Contributor
timestamp: September 28, 2016, 10:10:17 pm
content: I have worked with these in the past:http://www.mouser.com/ProductDetail/WIZnet/WIZ550io/?qs=%2fha2pyFadug8FD%2f6zedWSoPt6IVyj0i4Z%2fw6a0NNsKo%3dand consider them a much better value than the ENC28J60 module.I am currently only using wired connections but will keep the ST units in mind if a wireless need comes up at a later date.