Update README.md

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midelic 2016-07-28 00:24:30 +03:00 committed by GitHub
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@ -240,13 +240,13 @@ The main program is running on an STM32F103CBT6 chip running @8MHz X-tal and 3.3
[OSH Park link]()if you want to order.
####Buy a ready to use and complete tuner to used with new STM32 multimodule board
####Buy a 4 in 1 tuner to be used with new STM32 multimodule board
This module(4 in 1 tuner) can be purchased [here](http://www.banggood.com/DIY-2_4G-CC2500-NRF24L01-A7105-CYRF6936-Multi-RF-4-IN-1-Wireless-Module-p-1046308.html?AID=12202217&PID=3836173&SID=ir5dm8sw730004o402ecu&source=affiliate&utm_source=Banggood_CJ&utm_medium=commission_junction&utm_campaign=OpenPilot&utm_content=sandy). All the 4 RF modules are already implemented A7105, NRF24L01, CC2500 and CYRF6936. The board is also equiped with an antenna switcher which means only one antenna for all.
To update the firmware of this module you have to solder a 5 pin header(bottom ) and use an USB-serial like FTDI
Serial is already enabled by defaultso no need any soldering.
Serial mode is already enabled by default so no need any resistor soldering.
###Schematic
![Screenshot](http://static.rcgroups.net/forums/attachments/4/0/8/5/8/3/a9075092-113-multi_STM32.png)