Is it possible to use two (separate) serial port converters in a vera lite ? I use one right now for my Networx alarm system and want to use another (which should use inverted TTL logic) for a dutch smart energy meter with so-called P1 port.
The 1USB 4serial port converter which i found will probably not work because the interface to the networx is regular signals and the smart meter uses inverted signals. (This can be done using a FTDI utility program)
See dutch smartmeter topic for this.
So can i use an USB hub maybe ? Lately i used a unpowered hub to use USB stick and serial port converter together and that didn’t work.
You should be fine with a powered USB hub.
I think i can get a (older) dlink powered hub 8-port, i will test it tonight.
I have the 1st serial port on the powered hub now but an USB stick is not recognized. The serial port is OK and working with my alarm system. Maybe I will just order a extra serial cable and see what will happen.
It is a D-Link DUB-H7 hub
USB hubs can change the bus address of devices, so it’s possible that the stick’s device filename has simply changed. You would have to do a before/after on the directory listing of /dev to be certain.
i took the stick out when i installed de networx alarm plugin
formatted it to fat32 again and then weeks later put it back in with the usb hub to see if this worked but it isn’t even recognized that a usb stick is out in so it would be formatted
See the thread below for details on this problem. It is caused by a USB hub, and the way it maps the USB Thumbdrives to different ids (sda1, sdb1, sdc1, etc) after a restart of the Vera. Chris solved this on the DataMine plugin by just adding a field for his plugin to map the UUID (Universally Unique IDentifier) of the USB Thumbdrive. You can find the UUID of the drive by running the blkid command (from a terminal session). I am using a USB hub for my AD2USB alarm system serial to usb converter and the USB Thumbdrive for logging data points for the DataMine plugin. Its really a problem of OpenWRT and Linux itself.
http://forum.micasaverde.com/index.php/topic,13176.15.html
This link also describes the problem on OpenWRT, for those of you that don’t know is the base Operating System of the Vera.