Hi Everyone,

Maybe you know, we are manufacturing SimpleOSD since tree years and i'm planning to converting it to opensource since one years. 

2 month before Dennis Frie contact with me for an opensource OSD hardware, because he was developing an opensource firmware over Arduino base. I replaced a SimpleOSD board with arduino boot and 16Mhz crystal and sent to test. Results was very impressive and Dennis shared the code with SimpleOSD board support. Now We calling this boards as SimpeOSD OPEN

Today we finished the production of first 20 units of SimpleOSD OPEN boards and they are in stocks now.

Dennis developing MultiCopter and FPV type OSD screens on the firmware and maybe you can help him about APM or other autopilot compatible firmwares? 

Here is the DIY OSD topic on RCG
http://www.rcgroups.com/forums/showthread.php?t=1473207 

Thanks 

Melih

Hi Guys,

I'm working on the MultinoCopter project since 2 months. It is a 50x50mm size board with full compatible arduino pro mini architecture and 9DOF imu. I didnt share it because i have to finish the multicopter code before. Now it is working as a serial IMU for the computer based projects (calculating euler angles) and camera stabilizer. 

Yesterday i tested the camera stabilization code on the 3 axis. The mount coming from a giant rc helicopter and it designed for Canon 7D.

Have a nice weekend

Melih

I just finished the coding of our new opensource product ArduLog.

Product name was G-Log before it was being opensource. And i was using it for logging the GPS data of my FPV plane. Now it is opensource, i replaced all AVR-GCC codes with Arduino compatible ones and included Arduino Pro 16Mhz bootloader.

This is the KMZ output from ArduLog

ArduLog is a stamp size circuit which has the capability of doing Serial, I2C and Analog logging. Current firmware logging the GPS positions from it's serial input.

It's including a microSD socket, 2 color led for status and 4 input pin that connected with 6 ports of Atmega328 processor.

Default firmware supporting all GPS models which have standard GPGGA NMEA protocol.

The Baudrate of ArduLog is configurable with putting  the _BAUD.TXT file into the root folder of microSD card.

We tested it with all rates between 4800-115200baud and GPS refresh rates between 1-10Hz

Just create a file that named _BAUD.TXT and type the baudrate into. (like 115200)

ArduLog reads the file on startup and logs the GPGGA sentence of GPS data on every seconds.

Then our free KMZ generator software generates flight path KMZ files for Google Earth.

Features

• Full Opensource Circuit Architecture and Firmwares
• Coming with ArduLog GPS logger firmware for Plug and Play FPV usage
• Supports all GPS modules between 4800-115200 baud
• Supports all GPS refresh rates between 1-10hz
• 1Hz record resolution for GPGGA sentence
• Arduino Pro 16Mhz compatible Bootloader for upgrades and firmware modifications
• Supports all FAT16 formatted microSD cards up to 2Gb
• Autoincremental Record File Name
• Red/Green status LEDs
  Green: card detected
  Red (Continuous): empty slot or wrong card format
  Red (Blinks) : writing

Pinouts

File and Links

Product Page : store.flytron.com/46-ardulog.html

Sample KMZ file from ArduLog : test_flight.zip

ArduLog Google Code Page for Firmware and updates : http://code.google.com/p/ardulog/

GPStoKML generator Software : GPStoKML.zip

Baudrate Configuration File : _BAUD.TXT

Thanks for reading

Melih

Hi Guys,

I received the OpenLRS PCBs and we start to working about firmwares.

This is the Tx module of OpenLRS, It gives 100mw 433mhz RF power and its penetrating behind 5-6 concrete building!, we will test it on flight for range. System can controllable by any PPM signal or over RS232(bidirectional)



This is the Rx of OpenLRS,

It is very small receiver that supporting I2C (for IMUNext) and RS232 Telemetry.  It sends the RSSI level over telemetry and RSSI output (PWM).


And our killer 7W Booster for very long range oneway RC control.

All Atmega328 processors including MegaLoad bootloader for firmware update over rs232. All AVR programmers are welcome.

They will in stocks before 2011.

You can follow the OpenLRS project from here

Cheers and Mary Christmas

Melih

Hi Guys

This is my new ground station (and my smiley face)

I'm developing this software since 3 days (yes i know i'm too fast, because this is my job since 20 years)

It's working with my new SimpleOSD telemetry protocol over FrSKY's bidirectional RC modules. Protocol is very simple and it is sending all gps+battery values in 21bytes pack (1bytes deviceID+18bytes data+ 2bytes end of line data).

Features:

• It is OpenSource (under LGPL license)
• Live Video
• Live Google Maps position
• Video Capturing with all compression codecs.
• Data logging and others.

And i will add OpenLRS telemetry support with IMU and other sensors on Alpha version of firmware. Then i'm planning to design a PC based Autopilot system into the ground station. Because PC based programming easier for most of pc programmers.

You can follow my all FrSKY telemetry projects from this link

And this is the google code page of OpenFGS project. http://code.google.com/p/openfgs/

Please contact with me for being  the project member, all developers are welcome.

Thanks for reading

Melih

Hi Guys

Good news from OpenLRS (Opensource Long Range System) project!

Today i received 7 watt RF booster chips and at last i'm ready to finishing the PCB designs. This weekend i will finish the booster design and PCBs will be ready in 3 weeks.

Here is the latest PCB designs of Tx, Rx and IMU modules of OpenLRS

Tx and Rx modules size smaller than most of RC modules. Rx module including I2C (or 3 adc) conector pads on back side. I'm planning to connect my new 6DOF IMUnext v3 board there. Rx can stabilize the plane (or quadro) without any external parts and it sends the parameters to the ground over telemetry system. And Rx's rs232 port already available for digital telemetry or direct GPS connection.

Some advantages of OpenFARC:

• Direct ground computer based remote control and telemetry (Autopilot by computer?)
• Rx based Autopilot/stabilization/return to home.
• No Frequency hoping. I'm planning to using static 2 frequency switching for safety. You can use 2 or more modules for receiving the telemetry signals or transmitting the controls with static frequency, because you know your frequencies. Or hopping already possible.
• If you want to use it for really long range, you can add 7W booster on Tx module (only one way control without telemetry)
• Direct analog RSSI output on Rx
• RS232 telemetry and commandset (like "S2512" mean turn the 2th servo to center position,etc)

I'm developing OpenLRS project with AVR-GCC on Atmega328 chipset. All ATMEL developers are welcome ;)

We(Flytron.com) were thinking about turning our projects to opensource for a long time. But we were not sure about the way and procedures.

Then, this weekend I read and inspired Chris Anderson's great 10 Rules of Maker Businesses article. His all of the rules %100 right about our business. We find same rules after 2 years work except Opensource side of this job.

After this great article, we (me and Bora) decided to opensource development of our all projects. This is very hard for us because we have 20+ different products. Writing the manuals and explaining the codes will take long time but we will.

At first, we will share the design and codes of our RXBee (Xbee based radio tx/rx for robotic servo controls). Then the OpenFARC (Opensoruce far aerial control) project will follow them. I hope you will like it.

Thanks Chris :)

If you want to see how we cook the delicious electronics, please visit our blog. We will post everything there on every day.

Thanks for reading

Melih

ATP uses AFSK method to sending telemetry data over VideoTX’s audio

channel. The carrier is 2100Hz and a byte starts with one 1300hz wave(start bit), ATP sends

data bits after the start bit. and it sends minimum 10 carrier wave(zero) before a new start bit.

You can read my detailed information from this link (sorry for my English): http://www.flytron.com/pdf/audio_modem.pdf

Calibrating a PWM generator for 2100Hz carrier wave (for Atmega328)

This code generates static 2100hz square waves, put a 100nf capacitor on outside of processor and connect it on Audio in of TX, now you have a sinus on RX side ;)

You can send the bytes any time in your main code flow because AFSK protocol following waves not time sensitive protocol.
modem[] is an byte array that filled with data to send.
modem_byte is an integer for selecting byte of modem[] array
modem_bit is an char for counting sinus waves of AFSK

This code sends start bit at start and 8 bit of byte,
you should wait for 5ms for next byte for balancing sinus waves on audio stream, then you can send another byte also.

modem_bit = 0;while (modem_bit<18) //wait for all bit waves        {
                 
        if ((modem_bit%2==0) && ((PINB & (1 << 2))) ) // wait for 1 on PWM output. 
          {
          if (modem_bit==0)  // start bit
                 {
                 TCNT1H = 1;   // this values creates small delay for increasing the wave width
                 TCNT1L = 180; // and AFSK decoder can detect this big waves to 1, other small(2100hz) waves 0
                 }
                
           if (modem_bit>1)
                 {
                 if (modem[modem_byte] & (1<<((modem_bit-2)/2))) // if bit of bte is 1, change the wave width for 1 on AFSK
                   {
                   TCNT1H = 1;   // this values creates small delay for increasing the wave width
                   TCNT1L = 180; // and AFSK decoder can detect this big waves to 1, other small(2100hz) waves 0
                   }
                 }
                 
          modem_bit++;
          }

        if ((modem_bit%2==1) && (!(PINB & (1 << 2)))) // wait for 0 on PWM output  
          {   
          modem_bit++;
          }
        }

ATP Modem Software

I wrote a modem software for reading AFSK waves without any hardware (maybe a serial 100k resistor on microphone in)

File name is: SOSD_Modem.exe

Download link is: http://www.flytron.com/bootloader/xl_tools.zip

This is only software modem on the planet (or i didn't see another) :)

It is decoding AFSK codes from microphone input like an oscilloscope and giving output values from TCP for 3th party softwares. You can design your loggers, goggle earth interfaces or more with this plug.

It is using 20byte data pack for transmitting and software can separate them

First 16 byte is data bytes last 3 byte is line end and CRC

Pack of Bytes

[0-3] Latitude (4 byte = 32 bit long integer of coordinates)

[4-7] Longitude (4 byte = 32 bit long integer of coordinates)

[8-9] Altitude (2 byte = 16 bit long integer of altitude)

[10] Heading Angle (multiply it with 1.4 for finding angle value)

[11] Battery 1 voltage (divide 10 for value, 111 mean 11.1Volt)

[12] Battery 1 voltage (divide 10 for value, 74 mean 7.4Volt)

[13] Current Sensor 1 (multiply with 0.4 for value, 101 mean 40.4Ah

[14] Current Sensor 2 (multiply with 0.4 for value, 101 mean 40.4Ah

[15] RSSI (It is percentage of maximum value, 35 mean %35)

[16] Speed (km/h)

[17] Line End 1 (value 10)

[18] Line End 2 (value 13)

[19] CRC ( 8 bit totals of first 19 btye)

If you uses my original data pack Software Modem giving this type output from port 1976 (my birth year)

$TELE,lat,lon,alti,heading,voltag1,voltage2,curren t1,current2,rssi, speed, #13 #10

Or you can use your own data pack and you can decode them yourself from modem's RAW data output.

$RAWS,byte0,byte1,byte2,byte3,byte4.........,byte16, #13 #10

then you can decode your data bytes(first 16 byte)

This software only part of ATP i didn't share the codes because i want to share the protocol with all autopilot/OSD producers and i want to use their 3th party tools too.If I share the code, they can change only AFSK frequency and visuals for non compatible products.

New Features

I added direct KML file based live view for Google Earth on the new version of modem software.

You can click on plane_tracker.kml file and Google Earth connects your Modem Software to tracking the plane :)

It is already primitive because we have some connection problem on Google Earth since few months :(

Story Of ATP

If you want to read all discussions follow this link: http://www.rcgroups.com/forums/showthread.php?t=1157558

Thanks for reading

Melih