In case it helps anyone else using Amazon Echo to control Somfy for shades. The Echo seems to set any dimmable device type to 25% when you say “Alexa turn on (or open) xyz”. (Lots of people report the same default 25% issue with many lighting device types). With most community contributed Somfy device types that 25% setting would result in window shades not opening until you repeat the open command to Alexa. The level of 25% is considered closed. And that second open command results in full open 100% unless you tell Alex to set level to 50% etc. My wife thought specifying a level % was too much trouble.
The quick work around is to change device handler code
} else if (level <= 25) to
} else if (level <= 24) so a level of 25 now becomes the My/Open setting with the first Alexa voice command. In my case, the first open command to Alexa now opens shades to the My set point. And the next open command opens shades all the way. Nifty for real world usage.