ok thanks for the invite. after doing some research on your product, i decide to make the logo emphasizes on the led indicator. it flashes when the door is locked, so i symbolize it with the dual color of the led indicator. the blue is suppose to be unlocked, and the red is locked. that's the best i can do to symbolize the "flash" thing.
#58 using the shape of the device around the logo, and #59 just using the led indicator, and #60 with just using the silhouette of the device.
i think the best is #60 because it's elegant, it emphasize on the led indicator with a hint of the silhouette. and also it doesn't use much of color, so printing is cheaper.