!!!Important: Flashing the module without a 5v to 3v converter might destroy your chip!!!
Dieses Video auf Deutsch anschauen:    • CC41-A / CC2541 mit der HM-10 Firmwar...  

In this video I'm going to show you how to flash the HM-10 firmware on to CC2541 Chips by Texas Instruments. That is especially useful if you own a fake module named cc41-a. Since both modules have the same board design you can simple use the firmware of the genuine HM-10 modules. The only difference between the two of them is that the cc41-a misses one oscillator but that doesn’t lead to any problems. Therefore you can use all tutorials that are based on the HM-10 module (there are none for the cc41-a).

Links:
Post in the Arduino forum: http://forum.arduino.cc/index.php?top...
Software for the Arduino: https://github.com/RedBearLab/CCLoade...
Software for your computer: https://github.com/RedBearLab/CCLoade...
Firmware as binary file: http://uptobox.com/l8vivxdf2qev

Used Parts(Affiliate links):
FTDI adapter FT232RL: http://amzn.to/2jwr0bC
Original Arduino UNO: http://amzn.to/2jwu4UW
Arduino Nano V3: http://amzn.to/2jEbXu1
5x Arduino Nano V3: http://amzn.to/2jEdwrQ
Fake? HM-10 Modul: http://amzn.to/2ksvleb
Scalpel: http://amzn.to/2jYa4cl
Jumper wires: http://amzn.to/2k8LXd4
Soldering iron: my own soldering iron is that bad that I wouldn't recommend it to you