I was looking for something very simple just to connect some home electrical meter to the Emoncms. I just thought I would also share this idea.
I basically connected an Emontx v2 (cheaper) to a WR703n WIFI router with their serial port. Then I wrote a script to forward to data to the emoncms server.
It works pretty well and I find it good to have just only one unit that does that basic job.
I explained all the inside here and called it EmonWRT.
If anyone like the idea and want to contribute to improve it I'd be really happy to hear about you.
Re: Simple Emontx over WIFI / OpenWRT - EmonWRT
I just setup my wr703n with openWrt, and am trying to configure it with an Emontx as you've described on your site.
Your link for the emonwrt_forwarder.sh script seems to be broken - would you be willing to send this to me, or point me to the right spot?
Thanks, great idea on this setup!
Re: Simple Emontx over WIFI / OpenWRT - EmonWRT
The link is fixed now. Just realised you might need a configuration file example to place inside /etc/config. I wrote This howto for completion.
Good to hear you like the idea as well. Personally I find excellent to get rid of SD cards which tend to be unreliable.
Don't hesitate to share your code if you develop it further.
Re: Simple Emontx over WIFI / OpenWRT - EmonWRT
I got the file, and the config and howto are helpful too - thanks for that.
I'm setting up a emonTx shield on an Arduino Uno, which will send the "EMONWRT CSV_DATA" over USB to the wr703n (no direct serial connection). I'm hosting a local Emoncms server on a raspberry pi.
I'll share the code once I get it up and running. Again, great idea, thanks for documenting it so well.
Re: Simple Emontx over WIFI / OpenWRT - EmonWRT
So I take you are using the usb as a serial device? Are you reading from /dev/ttyUSB0 or similar maybe?
I will include the serial port as a parameter in the config file in next version. This should allow for setup like yours to be easily editable.
Re: Simple Emontx over WIFI / OpenWRT - EmonWRT
I have now added RF support for forwarding data from rfm12b sensors.
Re: Simple Emontx over WIFI / OpenWRT - EmonWRT
hello
I also found this idea very interesting and I wanted to test it on a arduino yun seen that mounts openwrt in order to have a unique piece but does not work I do not know why!