Hi, First let me say thanks for an awesome product (EmonPi) and all the information in the guides, etc. I am pretty new to Arduino and RaspberryPi in general so bear with me if that’s OK. So I received a complete EmonPi system yesterday and I managed to set it up, power it up and connect it to an…

[image] PerigVennetier: EDIT: I noticed that once logged in on the Emoncms webpage, I could change the conf file there. Interestingly, even though I changed it via command line directly, it would still show the calibration = 230V on the web page. Was I modifying the wrong file in emonhub/conf/em…

The Use in the USA page in Resources isn’t only about whole house monitoring, you can apply the principles to a single machine if you wish, but bear in mind that the default current transformers are rated for 100 A, so you might need to choose a CT that’s rated lower to give you better accuracy. (An…

Hi, So I managed to get all the source files and libraries, make the changes and recompile on my PC to a new set of hex files “emonpi_usa.hex” and “emonpi_usa_bootloader.hex”. I had to remount the filesystem to be writable with ‘$sudo mount -o remount,rw /dev/mmcblk0p2 /’. I uploaded the new hex…

I can’t answer your questions about the Pi, someone better qualified will have to answer that. I generally don’t recommend voltage-output CTs because of the inflexibility - they’re OK if your maximum current fits the manufacturer’s range, otherwise you tend to lose resolution and accuracy. If you …

Anybody else around to check out the issue I am having with the EmonPi not showing the correct power reading until I send the reset command? Thanks.

Can you explain what you mean by reset command?

I go to the following folder: ~/emonpi/firmware/compiled Then run sudo ./reset

That script just pulses the reset pin briefly to reset the AVR, it was a debugging tool and shouldn’t be needed for normal use. If you are saying everytime you reboot you are getting no data until you use that reset script that would suggest something is “locking up” during the boot sequence becaus…

Hi Paul, I have updated the firmware to work in the USA (enabling the USA flag) and changing the refresh rate (1 per second) and have named it differently, then programmed in the chip… What I get is as if the default firmware is used until I do the reset.

[image] PerigVennetier: I have updated the firmware to work in the USA (enabling the USA flag) This maybe where the confusion is seeping in. Have you set the “USA flag” in emonhub.conf? The flag in the sketch is controlled by emonhub via the serial port, so if emonhub is set for UK it will se…

Thanks for the reply and sorry it took me so long to follow up on this. I am using the kit with the fully assembled emonPi, the 5V AC:DC and the 9V AC:AC all plugged in on the same circuit my test appliance (an LCD display) is plugged in. After running in USA mode (after a reset), I ran “sudo serv…