Arduino FR632 RSSI Antenna Tracker




About: I love fly. Im a electronic, robotic and automation technician. I like drawing 3D parts.

This tracker not use any gps system.

This tracker use a diversity video receiver and a arduino pro mini, through the analog inputs arduino read the RSSI sinal percentage from receivers.

Sinal its compared and servo follow the stronger RSSI signal.

No pairing, no telemetry, no configuration.

Only you need adjust the value RSSI_MAX and RSSI_MIN in the arduino code about your receiver.

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Step 1: ​What I Used

FR632 Video Receiver -

Arduino Pro Mini -

Note: In the images you can see the arduino pro micro, burned after two tests, its clone!

In the last image you can see the arduino pro mini that I use.

Adjustable Step Down -

Servo Extension -

Two directional antennas

Some wires

Solder Station

1mm solder tip


Step 2: Instructions

With multimeter check the polarity of DC jack pins and solder two wires, positive and negative.

Be careful solder the wires in the correct pin if you dont do it you can burn the step down.

Step 3:

Solder the power supply wires to stepdown, isolate the stepdown with some double side tape.

Step 4:

Rssi pins in the FR632 receivers its the 4 pin from the right to left

Step 5:

Isolate the arduino with some double side tape

Step 6:

Put the arduino like a image.

Step 7:

Solder the wires to

Step 8:

Solder the RSSI pins to A0 and A1 analog pins.

Solder the RSSI pins to A0 and A1 analog pins.

Solder the servo signal wire to pin 5(PWM), ground wire to arduino gnd and positive servo wire to arduino raw pin.

Be careful, you need to adjust the stepdown voltage to 5V or 6V, attention to max servo voltage.

Step 9: Test

I use a 3S lipo to power FR632.

Turn on the FR632, choose your channel and you are ready to fly.

Good Flights!

Step 10: Source

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    17 Discussions

    Filipe vasconcelos

    9 months ago

    Hello everyone, I loved the very cool design!
    I have a doubt I have a Boscam RC832 receiver I would like to know if the possibility of doing the same tracking system with it!
    Thank you very much for your attention and I'm sorry I'm Brazilian and I do not speak English I'm using google translator! hug to all good flights
    1 reply
    FlyerFpvFilipe vasconcelos

    Reply 9 months ago

    Olá amigo,
    Sim podes, só tens de ir buscar o pino do rssi do módulo que está dentro.
    Abre e verifica que modulo é, depois basta ligar o pino rssi a um dos pinos no arduino.
    Como é modulo unico não vai funcionar da mesma maneira mas apanha sinal igual.


    11 months ago on Step 10

    brilliant project and really well explained and pictures help no end :)
    excellent idea!


    Question 1 year ago

    Seems the reciever and number of pins are different on the Quanum 2.4ghz Diversity Reciever. How do you go about identifying the RSSI pin?

    4 answers

    Answer 11 months ago

    This is the pinout for the quanum 2.4ghz module. I opened mine up and found the rfm type. Sm119r. Made by sunfky tek. Im currently trying to do the same with my 2.4. The front pin for rssi is behind the screen. Have to pull the screen to access it. Waiting on manufacturer to get back to me about the rssi scale before I go further. I dont feel like guessing at the scale, having to keep plugging in the arduino and reflashing.

    Screenshot_20181104-222105_Samsung Internet.jpg

    Reply 1 year ago

    I see the pic hmm. It has 9 pins. 4th from the right is RSSI. Mine has 10 pins. Is the 4th from the right still RSSI?


    1 year ago

    I have build the tracker with 180° Servo
    Turnigy ™ TGY-R5180MG 180-Grad-MG Analog Servo 2.0kg / 0.12sec / 12g

    Servo goes crazy, running 360° all time.
    With "try and error" I changed

    Now it seems to run nice.
    I am not a programmer. I would like to know what
    realy does or what it means

    Best regards

    Jochen Causemann

    1 reply

    Reply 11 months ago

    I am also using the same servo but its digital. Mine also keep going 360°. Tried your method but still the same. Hope someone can help..


    Question 1 year ago

    Hey, do you think there is a way that it works in a littlebit more mor Urban Environnement? So will it work if there are some 5,8ghz Wifis Going on different channels? Is there a possiblity to just make it listen to one channel?

    2 answers

    Reply 1 year ago

    Hello, this listen the frequency that you put in video receiver.


    Answer 1 year ago

    Its a great Project! Thank you for your Answer:)


    Question 1 year ago on Step 9

    Ok can u explain or add video of uploading the code to the board. That would be really helpfull to complete this project...

    1 answer