Hi
What does the sensor board output via the two wires. Is it analog voltage? The reason - I'm exploring ways to interface the Fluksometer to an Elk M1 security/automation system.
I suppose I could also use the new JSON/REST API to get the data, but the above would be more direct. Comments appreciated.
Thanks.
Hi Ket,
I'm not quite sure which two wires you are talking about? If you are referring to the wires attached to the screw terminal in this blog post, these are the wires connecting the current clamps in the fuse box to the Fluksometer. Have a look at this picture of a typical Fluksometer installation.
HTH,
Bart.
Hi Bart,
Thank you for your reply. I'm referring to the output of sensor board and not the 6 post screw terminal. Understand there are 4 pins (two for power to the sensor board and two for output) from the sensor board to the wireless router board. I should not have said wires - with v.1 you have a daughter board and there are no wires between the two boards.
What I was wondering was if there were any points in the circuit where I could get an analog voltage (0-5v) tap into my automation system.
Hope I have cleared up my query. Thanks.
Hi Ket,
We use UART communication between the sensor board and router board. The four pins are Tx, GND, Rx and Vcc. See this post for a PCB layout of the sensor board (v1.1, we're using v1.2 now). Moving your mouse over the picture will highlight the different parts of the board.
All calculations are performed in the sensor board's AVR. The latter reports these measurements to the router board via UART messages. We basically send out a pulse (pls) message for every watthour consumed.
If you'd like an analog voltage, you can use the clamp output. We use self-powered, split-core current transducers that convert the AC current flowing through the clamp's opening into a 0-5V DC output voltage on the (k,l) output terminals.
Cheers,
Bart.
Bart, thank you.