Let's Control It

Hi together,
i am using the normally the _normal_ESP8266_4M1M.bin file, so far so good.
I saw a file _ESP8266_1M_OTA_FHEM_HA.bin, a also using FHEM. What is the purpose of this file ?
What is the purpose of all the other files in the bin directory, many are explained, many not ?
During Firmware upload, i can choose between Firmware and Filesystem. When should i use Filesystem ?

Regards Klaus

There should be a description of the files in the README file in the ZIP file.

The 1M refers to 1M flash size, as 4M refers to 4M flash size.
Since we sometimes have a different partitioning for the same flash size, you can also see a marking like 4M2M or 4M1M.
Those refer to 4M flash size, 2M for the file system (or 1M)

You should always keep the same flash layout or else the settings will be deleted when upgrading to another build with a different flash layout.

The "OTA" builds have a very limited set of plugins and controllers, to make them fit in a 1M flash chip + room for an OTA upgrade.
To make it fit, the Domoticz and FHEM controllers have been split, since you would not likely use both.