Yoctopuce YHUBSHL1, User Manual

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www.yoctopuce.com 3
2. Presentation
1: Yocto-led 5: Port 1
2: Yocto-button 6: Port 2
3: Debugging port 7: Port 3
4: Trunk bus connectors 8: Port 4
Yocto-button
The Yocto-button has two functionalities. First, it can activate the Yocto-beacon mode (see below
under Yocto-led). Second, if you plug in a Yocto-module while keeping this button pressed, you can
then reprogram its firmware with a new version. Note that there is a simpler UI-based method to
update the firmware, but this one works even in case of severely damaged firmware.
Yocto-led
Normally, the Yocto-led is used to indicate that the module is working smoothly. The Yocto-led then
emits a low blue light which varies slowly, mimicking breathing. The Yocto-led stops breathing when
the module is not communicating any more, as for instance when powered by a USB hub which is
disconnected from any active computer.