How to Use FS-iA6B : Examples, Pinouts, and Specs

The FS-iA6B is a 6-channel receiver manufactured by FLYSKY, designed for use in remote control systems, particularly in model aircraft, drones, and other RC vehicles. Operating on the 2.4GHz frequency, it utilizes the AFHDS 2A (Automatic Frequency Hopping Digital System) protocol to ensure a reliable and interference-free connection. Known for its compact size, lightweight design, and robust performance, the FS-iA6B is a popular choice among hobbyists and professionals alike.

• Remote-controlled aircraft, drones, and helicopters
• RC cars and boats
• Robotics and automation projects
• Educational and hobbyist RC systems

The FS-iA6B receiver is designed to deliver high performance and reliability. Below are its key technical specifications:

The FS-iA6B receiver features multiple pins for connecting servos, ESCs, and other components. Below is the pin configuration:

1. Powering the Receiver: Connect a power source (4.0V - 6.5V) to the B/VCC and GND pins. This is typically provided by an ESC with a built-in BEC or a standalone BEC.
2. Binding the Receiver:
   • Insert the binding plug into the B/VCC port.
   • Power on the receiver while holding the bind button on your transmitter.
   • The LED on the receiver will flash, indicating it is in binding mode.
   • Once the LED stops flashing and remains solid, the binding process is complete.
3. Connecting Servos/ESCs: Attach servos or ESC signal wires to the appropriate channel pins (CH1-CH6) based on your transmitter configuration.
4. Antenna Placement: Ensure the dual antennas are positioned at 90-degree angles to each other for optimal signal reception.

• Antenna Orientation: Keep the antennas away from metal parts or carbon fiber to avoid signal interference.
• Voltage Monitoring: Use the B/VCC pin to monitor battery voltage if supported by your transmitter.
• Failsafe Configuration: Set up failsafe settings on your transmitter to ensure safe operation in case of signal loss.
• Range Testing: Perform a range test before each use to ensure the receiver is functioning correctly.

The FS-iA6B can be connected to an Arduino UNO for custom RC projects. Below is an example code snippet to read PWM signals from the receiver:

// Example code to read PWM signals from FS-iA6B receiver using Arduino UNO
// Connect CH1 of the receiver to pin 2 of the Arduino UNO

const int receiverPin = 2; // Pin connected to CH1 of FS-iA6B
volatile unsigned long pulseStart = 0;
volatile unsigned long pulseWidth = 0;

void setup() {
  pinMode(receiverPin, INPUT); // Set receiver pin as input
  Serial.begin(9600);          // Initialize serial communication
  attachInterrupt(digitalPinToInterrupt(receiverPin), readPulse, CHANGE);
}

void loop() {
  // Print the pulse width (PWM signal) to the Serial Monitor
  Serial.print("Pulse Width: ");
  Serial.print(pulseWidth);
  Serial.println(" us");
  delay(100); // Delay for readability
}

void readPulse() {
  if (digitalRead(receiverPin) == HIGH) {
    // Record the time when the pulse starts
    pulseStart = micros();
  } else {
    // Calculate the pulse width when the pulse ends
    pulseWidth = micros() - pulseStart;
  }
}

1. Receiver Not Binding:

   • Ensure the binding plug is correctly inserted into the B/VCC port.
   • Verify that the transmitter is in binding mode and compatible with AFHDS 2A.
   • Check the power supply to the receiver.

2. No Signal Output:

   • Confirm that the receiver is bound to the transmitter.
   • Verify the connections between the receiver and servos/ESCs.
   • Ensure the transmitter is configured correctly for the assigned channels.

3. Short Range or Signal Loss:

   • Check the antenna placement and ensure it is not obstructed.
   • Perform a range test to identify potential interference sources.
   • Replace the receiver if the issue persists.

4. LED Not Lighting Up:

   • Verify the power supply voltage (4.0V - 6.5V).
   • Check for loose or damaged connections.

Q: Can the FS-iA6B be used with non-FLYSKY transmitters?
A: No, the FS-iA6B is only compatible with FLYSKY transmitters that support the AFHDS 2A protocol.

Q: How do I enable failsafe on the FS-iA6B?
A: Failsafe settings are configured through the transmitter. Refer to your transmitter's manual for detailed instructions.

Q: What is the maximum range of the FS-iA6B?
A: The receiver has a range of over 500 meters in open areas, depending on environmental conditions and antenna placement.

Q: Can I use the FS-iA6B for telemetry?
A: Yes, the FS-iA6B supports telemetry when paired with a compatible FLYSKY transmitter.