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 # DIY-Multiprotocol-TX-Module
-DIY Multiprotocol TX Module
+Multiprotocol is a TX module which enables any TX to control lot of different models available on the market.
+
+[Main Thread on RCGROUPS](http://www.rcgroups.com/forums/showthread.php?t=2165676)
+
+![Screenshot](http://static.rcgroups.net/forums/attachments/4/0/8/5/8/3/t7952733-114-thumb-P4100002.JPG?d=1433910155) ![Screenshot](http://static.rcgroups.net/forums/attachments/4/0/8/5/8/3/t7952734-189-thumb-P4100003.JPG?d=1433910159)
+
+##Compatible TX
+
+###Using standard PPM output (trainer port)
+The multiprotocol TX module can be used on any TX with a trainer port.
+
+The protocol selection is done via a dip switch or a rotary dip switch for access to up to 15 different protocols. The selection must be done before the power is applied.
+
+To bind a model press the bind button, apply power and then release.
+
+###Using a serial output
+The multiprotocol TX module can be used on a Turnigy 9X, 9XR, 9XR Pro, Taranis, ... running er9x or ersky9X. (A version for OpenTX is being looked at)
+
+This enables full integration using the radio GUI to setup models with all the available protocols options.
+
+![Screenshot](http://static.rcgroups.net/forums/attachments/1/1/5/4/3/7/t8520065-194-thumb-IMG_20151217_002215%20%28Medium%29.jpg?d=1450308588)
+
+Options are:
+- Protocol and type: many main protocols have variants
+- RX Num: number your different RXs and make sure only one model will react to the commands
+- Power: High or low, enables to lower the power setting of your TX (indoor for example). 
+- Option: -127..+127 allowing to set specific protocol options. Like for Hubsan to set the video frequency.
+- Bind: bind a RX/model
+- Autobind: Yes or No. At the model selection (or power applied to the TX) a bind sequence will be initiated
+- Range: test range by setting the transmission power to the lowest value
+
+##Hardware
+
+###RF modules
+Up to 4 RF modules can be installed:
+- [A7105](http://www.banggood.com/XL7105-D03-A7105-Modification-Module-Support-Deviation-Galee-Flysky-p-922603.html)    for Flysky, Hubsan
+- [CC2500](http://www.banggood.com/CC2500-PA-LNA-Romote-Wireless-Module-CC2500-SI4432-NRF24L01-p-922595.html)   for Frsky
+- [CYRF6936](http://www.ehirobo.com/walkera-wk-devo-s-mod-devo-8-or-12-to-devo-8s-or-12s-upgrade-module.html) for DSM2, DSMX, DEVO, Walkera
+- [NRF24L01](http://www.banggood.com/2_4G-NRF24L01-PA-LNA-Wireless-Module-1632mm-Without-Antenna-p-922601.html) for Hisky, V2x2, CX-10, SYMAX and plenty other protocols
+
+RF modules can be installed for protocols need only. Example: if you only need the Hubsan protocol then install only a A7105 on your board.
+
+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).
+
+###Microcontroller
+The main program is running on a ATMEGA328 running @16MHz and 3.3V.
+An [Arduino pro mini](http://www.banggood.com/Wholesale-New-Ver-Pro-Mini-ATMEGA328-328p-5V-16MHz-Arduino-Compatible-Nano-Size-p-68534.html) can be used to build your Multimodule:
+
+![Screenshot](http://static.rcgroups.net/forums/attachments/4/0/8/5/8/3/t8214655-87-thumb-uploadfromtaptalk1405598143749.jpg?d=1441459923)
+
+or build your own board using SMD components and an associated PCB:
+
+![Screenshot](http://static.rcgroups.net/forums/attachments/4/0/8/5/8/3/t7952726-108-thumb-image-62c29cf2.jpg?d=1433909893)
+
+###Schematic
+![Screenshot](http://static.rcgroups.net/forums/attachments/4/0/8/5/8/3/a8443844-119-multiprotocol_diagram_rotary_serial_2.jpg)
+
+###Radio integration
+You can 3D print your box (detalis [here](http://www.rcgroups.com/forums/showpost.php?p=33294140&postcount=2034)):
+
+![Screenshot](http://static.rcgroups.net/forums/attachments/1/1/5/4/3/7/t8462144-54-thumb-Multi_case_9XR.jpg?d=1448575289)
+![Screenshot](http://static.rcgroups.net/forums/attachments/1/1/5/4/3/7/t8462145-106-thumb-Multi_case_v1.jpg?d=1448575293)