**To download the latest compiled version (hex file), click on [Release](https://github.com/midelic/DIY-Multiprotocol-TX-Module/releases) on the top menu.**
The multiprotocol TX module takes full advantage of being used on a Turnigy 9X, 9XR, 9XR Pro, Taranis, 9Xtreme, AR9X, ... running [er9x](http://openrcforums.com/forum/viewtopic.php?f=5&t=4598) or [ersky9X](http://openrcforums.com/forum/viewtopic.php?f=7&t=4676). An OpenTX version for Taranis is available [here](http://plaisthos.de/opentx/).
- There are 2 versions of serial protocol either 8 or 16 channels. 16 channels is the latest and only available version going forward. Make sure to use the right version based on your version of er9x/ersky9x.
- Channels order is AETR by default but can be changed in _Config.h.
Telemetry is available as a serial 9600 8 n 1 output on the TX pin of the Atmega328p using the FRSky hub format for Hubsan, FrSky, FrSkyX and DSM format for DSM2/X.
You can connect it to your TX if it is telemetry enabled or use a bluetooth adapter (HC05/HC06) along with an app on your phone/tablet ([app example](https://play.google.com/store/apps/details?id=biz.onomato.frskydash&hl=fr)) to display telemetry information and setup alerts.
To enable telemetry on a Turnigy 9X or 9XR you need to modify your TX following one of the Frsky mod like this [one](http://blog.oscarliang.net/turnigy-9x-advance-mod/).
Enabling telemetry on a 9XR PRO and may be other TXs does not require any hardware modifications. The additional required serial pin is already available on the TX back module pins.
You also need some [antennas](http://www.banggood.com/2_4GHz-3dBi-RP-SMA-Connector-Booster-Wireless-Antenna-Modem-Router-p-979407.html) and [cables](http://www.banggood.com/10cm-PCI-UFL-IPX-to-RPSMA-Female-Jack-Pigtail-Cable-p-924933.html).
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.
The currently supported Arduino version is [1.6.7](https://www.arduino.cc/download_handler.php?f=/arduino-1.6.7-windows.exe).
You need to download and install aditionally [STM32 core](https://github.com/rogerclarkmelbourne/Arduino_STM32/archive/master.zip) ,Arduino_STM32 folder in ...../Arduino/hardware/ folder (note. if the hardware folder doesn't exist you will need to create it).
Then run the IDE, and on the Tools menu, select the Boards manager, and install the Arduino Zero from the list of available boards. You must do this step, it installs the arm-none-eabi-g++ toolchain!
Download the [zip file](https://github.com/midelic/DIY-Multiprotocol-TX-Module/archive/master.zip) of this repository, unzip it in a folder, navigate to the Multiprotocol directory and then click on Multiprotocol.ino. The Arduino environment will appear and the Multiprotocol project will be loaded.
[_Config.h file](https://github.com/midelic/DIY-Multiprotocol-TX-Module/blob/multi-STM32/Multiprotocol/_Config.h) must be modified to select which protocols will be available, change protocols/sub_protocols/settings associated with dial for PPM input, different TX channel orders and timing, Telemetry or not, ...
Use this method only for Arduino Pro Mini boards with bootloader.
Use an external FTDI adapter like [this one](http://www.banggood.com/FT232RL-FTDI-USB-To-TTL-Serial-Converter-Adapter-Module-For-Arduino-p-917226.html).
From the Arduino environment, you can use Upload button which will compile and upload to the module: Skecth->Upload (Ctrl+U)
Make sure to follow this procedure: press the bind button, apply power and then release it after 1sec. The LED should be blinking fast indicating a bind status and then fixed on when the bind period is over. It's normal that the LED turns off when you press the bind button, this behavior is not controlled by the Atmega328.
It migth happen that your module is always binding at power up. If this is the case, there is a big chance that you are using an Arduino Pro Mini with an external status LED. To work around this issue connect a 10K resistor between D13 and 3.3V.
You can report your problem using the [GitHub issue](https://github.com/pascallanger/DIY-Multiprotocol-TX-Module/issues) system or go to the [Main thread on RCGROUPS](http://www.rcgroups.com/forums/showthread.php?t=2165676) to ask your question.
Please provide the following information:
- Multiprotocol code version
- TX type
- Using PPM or Serial, if using er9x or ersky9x the version in use
- Different led status (multimodule and model)
- Explanation of the behavior and reproduction steps
