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Old Jul 10, 2013, 03:26 PM
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Mini-HowTo
DIY "Hubsan" TX/RX module

Thanks to Phracturedblue brilliant work on hacking Hubsan protocol..., I was able to write an arduino code for a DIY Hubsan X4 Tx module.
With this hardware posted below and this code I think it is possible for anybody to build his own Hubsan Tx module.
Because any serious tx have PPM output signal on trainer port(or more, like 9x for connect external module),
....I used Hasi's "Read_any_PPM" decoder for getting the required servo timing data.
It is working like any normal Hubsan Tx.,when bind complete .....the LED is on.

Now:
Hardware:
1.V911/V929/V939/Hubsan/Syma X1/9116./Vitality H36/ harvested Tx modules
or XL7105-SY module from dealextreme
or XL7105-CL from suntek store.
or A7105 medium range module(500m) from ebay/aliexpress
2.Any setup with Atmega 8/168/328 - 8Mhz /16Mhz clock
Fuses:FuseH=0xC0 FuseL=0xA4(only for M8-8mhz internal clock version)
Fuses: FuseH=0xCC FuseL=0xBF(only for M8- using external 8Mhz X-Tal)
For 16 Mhz version with hex files on M168/328 chip you can change fuses using the recommendations below.
http://www.codingwithcody.com/2011/0...fuse-settings/


3.Power supply 3.3v.
4.Diode(1N914,1N4148)-optional(if using with a 4.2V lipo)For higher voltage it is necessary a voltage regulator from 5-12V to 3.3V.
for example LM1117MP- 3.3v
Update:
We abandoned using diode to reduce voltage and used voltage regulator LDO instead.
We used LM1117MP- 3.3V on this setup, but it can be used any LDO 3.3V.
5.LED

Warnings:
1.Do not exceed 3.3V for XL7105.
2.If you use higher voltage than 3,3v, let's say 4,2V from a lipo battery,..for atmel chip ,ensure that the XL7105 gets only 3.3v.
It was used successfully on other projects, a diode(1N914,1N4148) in series to drop the voltage from 4.2V to 3.4-3.5V for XL7105.
The "rationale" behind that is that the voltage drop on SI(silicon)diode is 0.7V so 4.2-0.7=3.5V;
3.Another warning,.............If used 5v to power your atmel chip..you must the reduce the voltage level to each pin going to A7105..because on 5V you get 4.2 V on Atmega pins..and burn the A7105 chip.If used 4.2 V powering the Atmega chip these precautions are not necessary as long as A7105 get 3.3v powered(from diode or LDO).So better stick within these values and don't put 5 v on your chip.
4.Another one..when flashing the AtmeL chip with new program using programmer like USBASP..... use 3,3V programmer...if used 5V programmer disconnect the XL7105 module to avoid burning it from programmer power supply.
5.Do not exceed 3.3V ppm voltage, if higher use a voltage divider or a 3,3V Zener diode in parallel to supply the required voltage to atmel chip ppm input pin.
I know, some people would say that is not necessary...but I prefer like that for safety.

Pinout:
XL7105; M8/168/328-8-16Mhz
SDIO ; D5
SCK ; D4
CS ; D2
PPM(TX) ; D3
LED ; C3(A3 promini)
Vcc ; VCC 3.3v +0.1uF cap between VCC and Gnd
Gnd ; Gnd


Clarifications:
I don't now the range of this module.Somebody reported that the range varies between same modules.With XL7105-CL/SY around 100m with wire antena connected.It was reported improved range if pcb antenna is replaced with a wire antenna or better a dipole antenna.
With A7105 long range module I think much more but nobody tested that one.
This code was tested on promini 328-16 MHZ-power supply 3.4v(from FTDI -3.3v)and....XL7105-CL module
Also the 8mhz code was tested on Atmega8 chip set to 8 Mhz internal clock...and one XL7105-CL module.
The code was made for and tested on Turnigy/er9x tx(AETR).For other tx which have different servo limits and channels order..the code must be changed accordingly.Please ask on this thread if used different Tx.
If not otherwise specified in the code name ...assume the hex file is for Turnigy9x/er9x(channel order AETR).

This code can be easily customized if required for using different pin-out(except D2 or D3 reserved for PPM pin.)If somebody requires different pin-out please ask and I'll do my best to change the code accordingly.
Recommended fuse settings:
Fuses:FuseH=0xC0 FuseL=0xA4(only for M8-8mhz internal clock version)
Fuses: FuseH=0xCC FuseL=0xBF(only for M8- using external 8Mhz X-Tal)
For 8/16 Mhz version with hex files on M168/328 chip you can change fuses using the recommendations below.

http://www.codingwithcody.com/2011/0...fuse-settings/

Now I have some explanations of the code naming used here.
*************************************
M8=Atmel chip Atmega8
M328=Atmel chip Atmega328
Hubsan_V2 or V2 = hubsan version no.2 with flips and light control.
If not specified V2 ....assume code is for Hubsan V1.
8Mhz/16Mhz=frequency used(XTAL frequency)

DX6I code is for Spectrum DX6I/DX8 Tx using channel order TAER or any other TX with TAER channel order
If nor specified explicitly the code is for AETR channel order(Er9x/Turnigy9x /Flysky).

************************************************** **************
To do list:
1.Surprise.

12.07.2013
Finished and uploaded code for M8-8mhz.tested working fine.A word of advice..the code is for Hubsan expert settings 100%.For normal default Hubsan setting you need to setup your tx to 50-60%.So right now it is "feisty".
17.07.2013
Uploaded a sketch schematic for Hubsan Tx module.
18.07.2013
I'm working on a stand alone hubsan module..and found that the last schematic with regulator is not working good with M8-8mhz,the voltage on M8 is dropping to 3.0V on full load which causing the M8 timers behaves abnormal.So I uploaded new schematic which is tested by me atm and working good.
One more word.
There are only 3 simple options for supply power to M8/A7105......one like the schematic below,I'm using right now...one with Zenner diode 3.3V -resistor combination ,and other using LDO 3.3V(for all)like LM1117M-3.3v fixed voltage.Atm I don't have LM1117M-3.3V ,I ordered one and when arrived I'll test and upload schematic.For who are interested there are schematics with this LDO on the internet.Anyway before you connect the A7105 to power...PLEASE CHECK ALL VOLTAGES.
19.07.2013.
Uploaded also one schematic with X-tal 16Mhz for M168/M328.
20.07.2013
Uploaded another schematic to reduce PPM voltage,using a classic Zener diode-resistor combination.This one was not tested yet by me personally,but ThierryRC on Flysky protocol thread based on the experience when tested his Flysky Tx version.
22.07.2013.
Uploaded new schematic with voltage divider on PPM in line.
Update:
Well I finished the stand alone Hubsan module.It is M8-8mhz version.I made it from some Tqfp 32 pcb adapter ,one cheap chinese wall mount power supply case and A7105 module harvested from a V911 Tx.The setup is made for both 12v and 5 v power supply.The module is connected to a HK/FlySky 6ch Tx.Tested adjusted channels orientation dual rate settings,...playing wonderful.
23/07.2013
As required by audience I uploaded a diagram version with only one 3.3V LDO, LM1117MP-3.3V.This is not tested yet..but this is the LDO I ordered and going to use.
update2:
Uploaded back the version with Zener diode on PPM in line.I decided to give it one more chance.Maybe somebody will test more and give some feedback.
27.07.2013
Well it arrived the LDO LM1117MP-3.3/NO...installed and tested ok.And also adjusted er9x model..Later when finished with all adjustments I'll post my er9x model for Hubsan.Overall it is working...good with the LDO 3.3V.See also the pics I posted.
29.07.2013
Well because there are too many diagrams around and confuse people I decided the remove the other diagrams and keep the last ones which were tested and recommended.I uploaded also a 16Mhz version.
Updated also the first diagram.
10.08.2013
I found some annoying problem in Hubsan code not really a bug ,a delay problem when updating packets in main loop.So I uploaded new improved hubsan hex files.
11.08.2013
I uploaded below a version for ATmega8 -8mhz X-tal.In order for this to work the fuses must be changed for using external clock instead of internal oscillator.Using an 8mhz X-tal will eliminate the internal clock inaccuracies....Fuses: FuseH=0xCC FuseL=0xBF(only for M8- using external 8Mhz X-Tal)
This version was not tested by me yet but should work.
12.08.2013
Removed the 16Mhz diagram and replaced with one with X-tal covering both 8 and 16 Mhz versions
10.11.2013
Added pic connection to 9x Tx.I see people have problem identifying this connection.
19.11.2013
Added code version for Hubsan V2 version with LED and anti flip feature.These Hubsan v2 features was cracked and coded .by "goebish".So credits goes to him.
LED control on channel 5.
Flip control on channel 6.
See hex.file "Hubsan_V2_M8_mhz_XTAL.hex"
15.12.2013
Added hex file for DX6I TX channel order TAER.
file Hubsan_arduino_M8_V2_DX6I.hex
19.12.2013
Added version for M328_8Mhz
"Hubsan_V2_M328_8Mhz.hex"
20.12.2013
Added version for M328_8Mhz for DX6I TX
"Hubsan_V2_DX6I_M328_8Mhz.hex"
Added diagram for arduino promini.
25.12.2013
Added version for M328_16Mhz
Hubsan_V2_M328_16Mhz.hex
27.12.2013
added diagram for using arduino promini 3.3V-8Mhz...and using onboard LED.s
Added also modified code ,full support for promini using on-board LED(no more additional LED)
"Hubsan_V2_promini_3.3V_8Mhz.hex"
04.02.2014
Added hex file for Hubsan V1 and DX6I tx.
"Hubsan_V1_M328_8Mhz_DX6I.hex"
08.02.2014
Fixed a bug in Hubsan code which prevent using 2 or more Hubsan quads in parallel.
Updated Hubsan_V2 _M328_8Mhz versions(DX6I version also) for using random id.
02.03.2014
Fixed a bug in Hubsan code which prevent using 2 or more Hubsan quads in parallel.
"Hubsan_V2_M328_16Mhz.hex"
************************************************** *************************************
FOR NEWBIES WHO DON'T HAVE MUCH SOLDERING SKILLS.
I RECOMMEND USING
1. AN ARDUINO PROMINI BOARD 3.3V-8MHZ(M328 chip and 8Mhz X-tal)
THE SCHEMATIC IS ON ATTACHMENTS.

"IF YOU HAVE ARDUINO PROMINI BOARD YOU DON'T NEED TO CHANGE FUSES.
THE FUSES ARE ALREADY SET.
ALSO YOU DON'T NEED ADDITIONALLY USBASP PROGRAMMER YOU CAN USE FTDI SERIAL TO UPLOAD HEX
"
************************************************** *************************************
Sources:
PB hubsan protocol
http://www.rcgroups.com/forums/showthread.php?t=1773853
Hasi PPM code
http://www.rcgroups.com/forums/showthread.php?t=1808432
-------------
Shopping:
XL7105-CL
http://www.suntekstore.com/goods-100...xl7105-cl.html
XL7105-SY
http://dx.com/s/XL7105
A7105(lmedium range)
http://www.ebay.com/itm/A7105-Wirele...-/120970651459
http://www.aliexpress.com/store/prod...696803434.html
http://www.aliexpress.com/item/A7105...623601913.html
-------------------
************************************************** ************************************************** ***********************************************
I see there are many people who don't now how to program a AVR chip like atmega8/168/328 directly using a hex file.For that you don't need any arduino skills or upload sketches, bootloader or other arduino stuff.See below some small tutorials on how to burn a hex file into an avr chip.All you need is a 2-3 dollars USBASP programmer and some wires, pin headers,some free software ,some reading skills and soldering skills..If one use google friend he'll find many more tutorials on this topic.See below.

http://praveendb.wordpress.com/2008/...-using-usbasp/
http://mikrotechnica.wordpress.com/2...a-with-usbasp/
http://extremeelectronics.co.in/avr-...r-programmers/
http://avr8-burn-o-mat.aaabbb.de/avr...de_gui_en.html
Shopping for USBASP Better buy one with 3.3 V or switchable 5V to 3.3V.Don't put 5V directly on A7105!
http://www.ebay.com/sch/i.html?_trks...at=0&_from=R40

Loading hex files without USBASP programmer or arduino IDE
using FTDI
http://russemotto.com/xloader/
************************************************** ************************************************** ***********************************************
DIY:
Midelic DIY "FlySky" RF module
http://www.rcgroups.com/forums/showthread.php?t=1921870
Boosting range of A7105:
http://www.rcgroups.com/forums/showthread.php?t=1830856
DIY 2.4ghz dipole antenna
http://www.rcgroups.com/forums/showp...&postcount=128
I know there is already one version on openrc forum...............but this one is here on RCGroups....so
Enjoy!
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Last edited by midelic; Jan 07, 2015 at 08:44 AM. Reason: add hex for Hubsan_V2_promini_3.3V_8mhz
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Old Jul 10, 2013, 03:26 PM
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FlySky-Hubsan dual protocol module

Well I finished the code integration of FlySky and Hubsan Tx code on one single chip Atmega8..as I said before it fits perfectly.So the pinout remain the same as Hubsan pinout ..added only the switch pin .
Schematic is the same as Hubsan only added one switch to M8/M168/M328 pin D6.
How it works.?Well when SW is "off".... flysky Tx code is loaded.For loading Hubsan code we must switched off the Tx main switch first and........ switched on .....the one on the module to Hubsan mode.If used Er9x you can choose one model for Hubsan and one for Flysky ......switchable at the beginning with menu and or exit buttons(the users of er9x knows that).

I think with both modes on one chip more value added to the build.
Warning:
Don't use this switch when in Flysky mode or Hubsan mode.First power down the Tx ..using Tx main switch.
Nothing bad will happen.....but the mode selected will not work.
The code was made for and tested on Turnigy/Er9x tx.For other tx which have different servo limits.and channels order.....the code must be changed accordingly.Please ask on this thread if used different Tx.

Pinout:
XL7105; M8/168/328-8-16Mhz
SDIO ; D5
SCK ; D4
CS ; D2
PPM(TX) ; D3
SW; D6(with GND)switch.
LED ; C3(A3 promini)
Vcc ; VCC 3.3v +0.1uF cap between VCC and Gnd
Gnd ; Gnd


31.07.2013
I uploaded a diagram...A picture is worth 1000 words.
8.08.2013
uploaded FlySky_Hubsan_16Mhz version code.
Fixed small bug in FlySky_Hubsan_8Mhz version.Uploaded back corrected version.
Uploaded also schematic/diagram for 16 Mhz....
09.08.2013
I modified my Hubsan module case installed one micro sliding switch and flashed with both protocols FlySky and Hubsan my M8 chip.See pics below with sliding-switch installed.
Update:Thaks to "djdavies83" I Found a bug in flysky code.Uploaded corrected hex files.see attachments below.
10.08.2013
I found some annoying problem in Hubsan code not really a bug ,a delay problem when updating packets in main loop.So I uploaded new improved flysky-hubsan hex files.
11.08.2013
I uploaded below a version for ATmega8 -8mhz X-tal.In order to use that the fuses must be chaged for externa clock..Using an 8mhz x-tal will eliminate the internal clock inaccuracies....Fuses: FuseH=0xCC FuseL=0xBF(only for M8- using external 8Mhz X-Tal)
This version was not tested by me yet but should work.
12.08.2013
Removed the 16Mhz diagram and replaced with one with X-tal covering both 8 and 16 Mhz versions
25.09.2013
I made some improvements to Flysky code so I uploaded new multi protocol version....FlySky_HubsanTx_8Mhz_v2XTAL.hex" file
18.10.2013.
With my limited skills on eagle cad I made a schematic and board for a Flysky /Hubsan TX module using eagle cad.For who is interested to make their own Flysky/Hubsan tx pcb or order on some manufacturing pcb studio...I upload below the eagle cad files.
I'm not sure 100% is everything ok so please check/modify everything before making/ordering the pcb.
23.11.2013
added combo version for Hubsan V2 version(light and anti-flip controls).
These Hubsan v2 features(light and flip coontrols) was cracked and coded .by "goebish".So credits goes to him.
File "FlySky_HubsanTx_V2_M8_8mhz.hex"
This version like previous ones is for ER9X and SW(switch) version.
channel 5 lights
channel 6 flips
02.12.2013
Added version for M328-8mhz(for example promini 3.3v.)
"FlySky_HubsanTx_V2_M328_8Mhz"
15.12.2013
added version for DX6I,M328 chip at 16 Mhz(for example promini 5V)
file "FlySky_HubsanTx_V2_Dx6i_M328_16Mhz"
20.12..2013
Borrowed diagram from Davekra ..showing how to connect promini to A7105
Added also version for DX6I TX, M328 chip at 8Mhz(for example promini 3.3V)
file "FlySky_HubsanTx_V2_Dx6i_M328_8Mhz"
01.01.2014
Added version for M328_16Mhz hubsan V2
"FlySky_HubsanTx_V2_M328_16Mhz.hex"
14.01.2014
Uploaded a photo of a Flysky module with A7105 pins exposed.This will help install a DIY module inside the case.


Info:
Fuses:FuseH=0xC0 FuseL=0xA4(only for M8-8mhz internal clock version)
Fuses FuseH=0xCC FuseL=0xBF(only for M8- using external 8Mhz X-Tal)
With the M8-8mhz internal clock version the heli must be trimmed properly before using, because the internal clock is not accurate as with the X-tal.

For 8/16 Mhz X-Tal version with hex files on M168/328 chip you can change fuses using the recommendations below.
http://www.codingwithcody.com/2011/0...fuse-settings/


Enjoy!
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Last edited by midelic; Jan 13, 2014 at 07:31 PM. Reason: add version for M328-16Mhz X-Tal hubsan v2 TX DX6I
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Old Jul 10, 2013, 03:27 PM
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HUBSAN RX

Pinout
XL7105 ; Promini(M328)/8/16Mhz

SDI_pin 5 //SDIO-D5
SCLK_pin 4 //SCK-D4
CS_pin 2//CS-D2
RED_LED_pin A3//C3 - LED +resistor 1K
//
Servo1_OUT 3 //Servo1(D3)
Servo2_OUT 7 //Servo2(D7)
Servo3_OUT 8 //Servo3(B0)
Servo4_OUT 9 //Servo4(B1)
Servo5_OUT 10 //Servo5(B2)
Servo6_OUT 11 //Servo6(B3)
Servo7_OUT 12 //Servo7(B4)
Servo8_OUT 13 //Servo8(B5)
//
Clarifications:
Same precautions like in first and second post.Powered at 3.3V for all setup(promini 16Mhz+A7105),Don;t exceed 3.3V max for A7105.
Only bench tested ,on promini 16Mhz ,......not with real servo..Atm the code is with normal PWM servo no PPM yet.
edit:
Tested OK with real servo by user "Zr_Flyer"
Channel order:T R E A from 1 to 4.
see file "Hubsan_RX_M328_16Mhz.hex"
/***********************************

12.06.2014
Add Hubsan rx code with PPM out only
changed also channel order to AETR.
see "Hubsan_RX_ppm_M328_16Mhz.hex"
Pinout the same
SDI_pin 5 //SDIO-D5
SCLK_pin 4 //SCK-D4
CS_pin 2//CS-D2
RED_LED_pin A3//C3 +resistor 1K
//
PPM out pin -10(B2)
/**************************
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Last edited by midelic; Jun 13, 2014 at 11:04 AM. Reason: added code for Hubsan RX ppm
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Old Jul 10, 2013, 04:12 PM
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nice! Didn't think you'd be done that fast.
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Old Jul 10, 2013, 04:17 PM
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Yes I said at the end of the month....but the thinking of swimming pools and sunshine ...speed me up.....Lol!
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Old Jul 10, 2013, 05:09 PM
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......soooo that's a no on testing pool :-)
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Old Jul 10, 2013, 06:36 PM
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Nice job M!
Cheers,
Jim
Quadrocopter and Tricopter Info Mega Link Index
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Old Jul 10, 2013, 07:15 PM
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We can rebuild it!
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Yay, can't wait to get bits to make this.
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Old Jul 11, 2013, 06:19 PM
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Finished code for M8-8mhz.tested working fine.Uploaded on first post.
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Last edited by midelic; Jul 11, 2013 at 07:31 PM.
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Old Jul 11, 2013, 09:30 PM
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XL7105-SY module from dealextreme

http://dx.com/p/xl7105-sy-diy-2-4ghz...n-2-pcs-149253
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Old Jul 11, 2013, 10:16 PM
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Quote:
Originally Posted by dealextremefan View Post
Was already a link
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Old Jul 12, 2013, 01:57 AM
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Quote:
Originally Posted by SadSack View Post
Was already a link
Phil, you have PM. PLease Check it
Sorry to disturb this thread
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Old Jul 12, 2013, 03:42 AM
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This is a lot simpler than the one at openforums, I like it...

Good job, midelic
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Old Jul 12, 2013, 05:17 AM
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Is it possible to have a 8Mhz internal clock for the blackmoon pcb ? (or source so I could modify pinout).

I finally got around to unlocking ten mega8, I bought one year ago that were all locked (gotta love ebay)

Thanks
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Old Jul 12, 2013, 06:05 AM
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//Blackmoon/SadSack pinout
#define PPM_pin 2//PPM in D2
#define SDI_pin 11 //SDIO-B3
#define SCLK_pin 12 //SCK-B4
#define CS_pin 13//CS-B5
#define RED_LED_pin A4//A4(C4)
/-----------------------------------------
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