Transmitter and Receiver for Drones

akanzler007akanzler007 wrote 05/21/2020 at 12:59 • 6 min read • Like

FlySky FS-i6 2.4G 6CH PPM RC Transmitter With FS-iA6B Receiver

A lot of people are building interest in flying a drone and knowing its ocean of applications that it can be used for. Drones are one of the fastest growing technology industries in the world with new innovations in its components every now and then. With its varied application the demand of drone is increasing day by day. Maybe you want to get in on the future of aerial photography. Maybe you’re looking for a fun and futuristic toy for your kids.

Drones can’t fly themselves! Well they can but the whole point of flying a drone is actually controlling it. Drone controllers are everywhere in the drone world, but have you ever stopped to think about how they actually work? , which controller to choose and which site is the best to buy a drone controller. 

In this blog we will look at all of these things starting with the basics of drone controllers, looking at how drone remote controllers work and the different features they give drone pilots.

Drone Transmitter

A Drone Radio Transmitter is an electronic device that uses radio signals to transmit commands wirelessly via a set radio frequency over to the Radio Receiver, which is connected to the drone being remotely controlled. In other words, it’s the device that translates pilot’s commands into movement of the multirotor. A FPV Drone Radio Transmitter transmits commands via channels. Each channel is an individual action being sent to the aircraft.

Frequency of the Transmitter

An FPV Drone Radio Transmitter commonly use the following frequencies: 27MHz, 72MHz, 433MHz, 900MHz, 1.3GHz and 2.4Ghz, 433Mhz, 900Mhz and 1.3GHz are typically used in long range FPV and RC systems.

OpenTX is an open source custom firmware made for RC radio transmitters, compatible with the following radios:

OpenTX is a highly configurable system offering plenty options for all types of RC models. It is created by FPV pilots with pilots in mind.

Wi-Fi and Bluetooth have made it possible for drone manufacturers to create device controls that run on smartphone or tablet. Not just a smartphone version of your RC transmitter, but high-tech controls. 

Radio Receivers

A Radio Receiver is the device capable of receiving commands from the Radio Transmitter, interpreting the signal via the flight controller where those commands are converted into specific actions controlling the aircraft.

Radio Receivers can have the following features:

Telemetry is the data transmitted from the Radio Receiver back to the Radio Transmitter.

It usually contain a variety information, depending on the type of radio and flight controller. The most crucial pieces of information are battery voltage reading, current draw and “RSSI”

Radio communication protocols can split into two groups:

TX Protocols are in most cases specific to brands:

However, there are also brand specific ones:

A Receiver must be compatible with the Radio Transmitter which in most cases means that the same brand of Rx and Tx need to be purchased in order to establish a communication. There are however radio receivers that may work with the same protocol but are not from the same brand.

Frequencies must also be the same on both Rx and Tx. For instance; a 2.4GHz Transmitter can only work with 2.4GHz Radio Receiver.

Receiver antennas are usually soldered directly to the receiver main board. Antennas are made from a coax cable where the main wire is separated from “ground”. Radio Receivers are usually manufactured with two antennas to ensure the best reception.

The main wire is the antenna active element which receives radio signals via a specific frequency. Length of the active element depends on the frequency and is exactly 1/4th of the wavelength for a specific frequency. Length of the antenna wire is not fixed; only active elements has to be at specific length. As an example, the wavelength for 2.4GHz transmission is 122mm. 1/4th of that equates to 30.5mm for the active element.

Receivers usually come with two antennas for 2.4GHz Frequency. To achieve the best signal reception it is recommended to keep them at a 90degree angle in relation to each other when installed on the multi rotor.

How To Bind Transmitter and Receiver

  1. Insert the bind plug into channel three (VCC/BIND) port of the receiver, and turn the car on.
    • The red LED should now be flashing continuously, indicating the receiver is in binding mode.
  2. Press and hold the bind button on your controller*, and switch it on.
    •  The bind button on the FlySly GT2 is recessed. I recommend using a pen, or even a body clip to press the bind button to avoid frustration.
    • The green led on the controller will flash, indicating that it is in bind mode. The LED on the receiver will now change to solid red, indicating that the bind was successful.
  3. Turn the car and controller off, and remove the bind plug.

That’s it! Turn everything back on (always the controller first, then the car) and you’re ready to go race!


Thus, while selecting your Drone Transmitter and Receiver, it is important that they are compatible with each other in terms of frequency and other parameters. Also, it is necessary that both the components have the size and features according to the specifics needed. It is recommended to purchase a high quality Radio transmitter with Receiver when starting out to fly your own drone as it is one of the components that will last long enough.

For getting the best Radio Transmitters and Receivers for drones do visit for some exciting offers and a wide range of drone Transmitters and Receivers, the links are given below.

FlySky FS-i6 2.4G 6CH PPM RC Transmitter With FS-iA6B Receiver

Drone Transmitter & Receiver