Help! Making my first Quad!

[LitterBug]

 

[LitterBug]

So I could use my Flysky tx with Sbus with a Elrs rx?

No. You could if you had an ELRS transmit module.

 

[Houndpup Rc]

ELRS has better range, but it is the RF modulation technique, not the serial protocols that make the difference. and depending on the PWM refresh rate that you select, the modulation and range can differ. It's tuneable depending on the application you wish to set it up for, IE racing vs long range.


ExpressLRS receivers can communicate using a variety of serial protocols including SBUS

• CRSF (Crossfire) + Inverted
• SBUS + Inverted
• SUMD
• DJI RS2 Pro (Modified SBUS with pre-configured limits)
• HoTT Telemetry
• Tramp
• SmartAudio

It that why I saw a Elrs Tx with 2.4ghz? I thought it was only 900mhz.

 

[Houndpup Rc]

No. You could if you had an ELRS transmit module.

Oops. I misread what you said.

 

[LitterBug]

It that why I saw a Elrs Tx with 2.4ghz? I thought it was only 900mhz.

You are hitting all the ELRS Rabbit holes! 😁

ELRS can do 900Mhz, 2.4Ghz, and now BOTH 900 and 2.4Ghz at the same time (Gemini).

 

[Houndpup Rc]

You are hitting all the ELRS Rabbit holes! 😁

ELRS can do 900Mhz, 2.4Ghz, and now BOTH 900 and 2.4Ghz at the same time (Gemini).

Wow! I have a lot to learn! Think I am going to have to watch some YT videos......

 

[LitterBug]

SBUS / Ibus is what the tranmitter uses to communicate with the Transmit module in your transmitter. On the Receiver side, it is what the receiver uses to talk to the flight controller. What happens in the radio waves is what the tranmitter and receiver modules do. So FrSky, FlySky, DSMX, ELRS are the RADIO protocols that those modules use to talk to each other over the radio spectrum.

 

[Houndpup Rc]

SBUS / Ibus is what the tranmitter uses to communicate with the Transmit module in your transmitter. On the Receiver side, it is what the receiver uses to talk to the flight controller. What happens in the radio waves is what the tranmitter and receiver modules do. So FrSky, FlySky, DSMX, ELRS are the RADIO protocols that those modules use to talk to each other over the radio spectrum.

So basically different Tx's speak different languages and the Rx is the interpreter for the FC?

 

[LitterBug]

ELRS is pretty well documented if you can wrap your head around it. The screenshot above with the different packet, data, and modulation methods was taken directly from the ELRS documentation.

 

[Houndpup Rc]

ELRS is pretty well documented if you can wrap your head around it. The screenshot above with the different packet, data, and modulation methods was taken directly from the ELRS documentation.

Probably should as it is becoming more popular.

 

[LitterBug]

So basically different Tx's speak different languages and the Rx is the interpreter for the FC?

Close. The TX is like the FC in your hands. It takes all the sticks/switches, dials, etc and converts it into a signal that the TX module can use to send it out over the airwaves

 

[Houndpup Rc]

There are also different ESC protocols too right?

 

[LitterBug]

There are a lot of steps that go on to take a stick position and send it to a servo at the other end. pictures could be useful.....

 

[LitterBug]

There are also different ESC protocols too right?

Oh yeah. Rabbit holes galore in every aspect of the hobby.

 

[Houndpup Rc]

Hey @LitterBug do you have any recommendations for a F7 FC/ESC Stack or AIO for a 5" drone?

 

[LitterBug]

Hey @LitterBug do you have any recommendations for a F7 FC/ESC Stack or AIO for a 5" drone?

Why do you need a F7?

 

[Houndpup Rc]

Why do you need a F7?

I thought they are better and I was going to get a couple on my next AliExpress order. (Want to do some higher quality builds.)

 

[Houndpup Rc]

I thought they are better and I was going to get a couple on my next AliExpress order. (Want to do some higher quality builds.)

Or do you think its not necessary? What do most modern drones have?

 

[LitterBug]

F405 is still the way to go unless you have a need that requires more processing power. The F411 and F722 are short on memory which limits their support and functionality. Higher end F7 and H7 processors cost more with not much added benefit for flying quads.

 

[Houndpup Rc]

F405 is still the way to go unless you have a need that requires more processing power. The F411 and F722 are short on memory which limits their support and functionality. Higher end F7 and H7 processors cost more with not much added benefit for flying quads.

Oh okay. I thought the F405's were not the thing any more.(But I guess no one ever got rich selling old technology lol) Thanks! F405's are differently cheaper.😅