Release 02_03_18 contains some changes to support IoTaWatt manufactured with different burden resistor values. The latest production run now uses 20 ohm instead of 24 as in older units. Without debating the relative merits of the two, suffice to say that on balance there should be no practical impact for the vast majority of users.
This problem is with the user capability to specify new burden values. To put it simply, that capability is not working. Sounds awful, but the reality is that hardly anybody changes the burden values. Where this has cropped up is in a workaround trick that I suggested to allow using some selected voltage type CTs without modifying any hardware. The short story is that it’s done by changing the burden specification which isn’t working.
Mea culpa. I had made the proper changes and it was working great, but I got sloppy with my merging of configuration app changes and the changes were lost. I’ve reinstated the changes in the latest github version and they will go out with the next release. In the meantime, if there is anyone that neads to change their burden specification, you can either:
- Download and install the updated configuration app index.htm (94.3 KB)
- Change the burden specification in the spiffs file using the file manager
- Post a support request and I’ll talk you through one of the above.