Found it myself. There are multiple issues and reasons why it did not work. First, querying battery and motor is not supported by the simulator. Second, it does work in MyModule (in the app when truly connected with the bike) - but I overlooked that communication was blocked by my VPN-based AdBlocker (Blokada). Once I created an exception for the Cobi app, data was sent to my module. But the biggest fault was - and I stumbled over it just be accident - the documentation (https://cobi-bike.github.io/COBI.js/), although stating it is for cobi-js 0.44.0, is for a more recent version! By trial and error, I have found version 0.59.0 but cannot be sure this really is the latest one. I have not found any hint anywhere on something newer than 0.44.0 but in fact...
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