Guys, I thought you were trying to build a community around your product, maybe the removal of forum messages trying to publicize your product providing additional software which extends the features - is not the ideal way.
In any case I'm distributing under the GPL license a tool to download data and monitor in realtime the EMF-390 unit. The monitoring commands should work also on EMF-380 models.
Inside the repository (https://gitlab.com/codref/em390cli) you find binaries for windows and linux (arm and x86). Use at your own risk, they are meant to test out the tool and includes debug symbols.
An example case of use is the data retrieval from EMF unit and push to an InfluxDB (a database specific for time series) connected to a Grafana dashboard. If someone is interested I can provide further information.
Anyways, I would be very interested to see the end result of what you can do with InfluxDB and Grafana. Does it allow to "easily" compare daylong recordings of different rooms / different corners of the rooms?
About Grafana and InfluxDB, indeed they provide a very intuitive way to compare measures. I think the EMF-390 logger wins over the realtime monitoring, mostly because of the difficulty to carry an internet connection (and a raspberrypi) in the exact point you want to monitor. I can write a short article - will let you know when and where.
I gave it a quick try. The EMF-390 is connected to an USB port and charging. Then I run `./emf390cli -l`trying to find what serial port I should use but it lists nothing.
You may try to run the command 'dmesg' and get a message like: [536146.821503] usbcore: registered new interface driver usbserial_generic [536146.821517] usbserial: USB Serial support registered for generic [536146.823203] usbcore: registered new interface driver ch341 [536146.823217] usbserial: USB Serial support registered for ch341-uart [536146.823229] ch341 2-1.4.2:1.0: ch341-uart converter detected [536146.824694] usb 2-1.4.2: ch341-uart converter now attached to ttyUSB0