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One more idea: If you run 64-bit Windows7 and 32-bit python, you would like to have your libusb0.dll in C:\Windows\SysWOW64 instead.

Yes - out of the box only nordic chips are supported.
How heavy is your receiver? Max payload is ~5g. If it has some kind of standard interface and works with 2.7V, you could use the extension port and change the firmware to use that receiver module instead.

The folder sounds right to me. The issue is that when you run ramp.py, python does not seem to load pyusb correctly (you mentioned earlier that pyusb1==False), it falls back to pyusb0.x, which has another interface. PyUsb1.x does not have the open function, hence that fails later on. 1.) Can you use...

According to http://wiki.bitcraze.se/_media/projects:crazyflie:hardware:crazyflie_control_board_rev.f_-_component_placement_bottom_annotated.pdf it is D4, which is Bat54 (see http://wiki.bitcraze.se/_media/projects:crazyflie:hardware:crazyflie_control_board_schematics_rev.f.pdf). Where to buy it dep...

Thank you for running all those tests! I believe the issue is that your normal cfclient somehow uses a different pyusb version. One thing which should change things for sure is installing pyusb 1.0. You can find it here: https://github.com/walac/pyusb along with some documentation on how to install ...

Removing the battery protection pcb is actually dangerous: your battery can explode during charging. There is no specific protection chip on the flie itself.

You can usually buy a propeller pack wherever you bought the flie. It should be around 5$ for one pack (4 CW and 4 CCW I think).

Did you happen to use PyCharm to see if there is an exception thrown? It sounds like the open() call triggers some exception and it would be good to know what it is (sometimes it contains additional details). An open call can fail for security reasons or if the device is in use by another applicatio...

ASL means Above-Sea-Level and is computed based on the barometer pressure. There are not many details available, one start would be here http://wiki.bitcraze.se/projects:crazyflie:firmware:altitude_hold and the forum (there are some old posts about it because the mode was developed by a user). Drift...

It sounds (and looks) like it got too heavy actually. The Crazyflie is specified with 5g of payload, however the flight performance decreases significantly if you actually put 5g on it (5g is 25% of its mass!). For the battery issue: The firmware is calibrated on the given battery for charging. Addi...

Qt4 and Qt5 can be installed at the same time and this is also normal at this point (a few apps switched to Qt5, but many remain using Qt4). However, one application can not use Qt4 and Qt5 at the same time - this causes strange behavior including segfaults. I think you don't need to do anything her...