OK. Those ‘old instructions’ are on the Mooshimeter Wiki ( https://moosh.im/wiki/index.php/Logging_Instructions). Where can I find current instructions? The ‘Logging’ Wiki page is blank.

As I understand it now, logging is running whenever it is enabled and stopped when it is disabled. I don’t find that especially intuitive, but I can live with it.

More questions and remarks:

Under ‘Load Logs’ now I see 25 logs – some with 0 bytes, some with 1 or 3 kB. Why are some of them blank?

How can I delete logs? Do I have to remove the SD card and delete the files on a PC?

When I email logs to myself, the messages never arrive.

It would be nice to not have to enter the email address (always the same) each time you want to send a log file.