WeMos with servo control

[the cosmic gate]

I connected a servo to the WeMos and tried to control this with the commands given : http://<espeasyip>/control?cmd=Servo,1,2,90

But i want to use this for blinds , so how is it possible to move the servo by any command but then in negative way ?
The reason why: i want to move this venetian blinds from the horizontal ( 0 point) to turn to the left and right so i can control the way the sun comes into the room or not

[TD-er]

Have you tried "-90" ? (not looked into the source code to see if that would work)
I don't know the servo plugin from my own experience.
Is the "0" position the max of a range or is it the middle?
If it isn't the middle, I would suggest to try and mount either the servo or the arm connected in another position, or else it will not work at all.