A lightweight, reliable iBUS telemetry library specifically designed for Arduino Nano Every (ATmega4809).

The popular IBusBM library has timing issues on Arduino Nano Every due to differences in the ATmega4809's timer architecture. EveryIBus solves these problems with a direct, interrupt-friendly implementation that just works on the Nano Every.

• ✅ Reliable on Nano Every - No timer interrupt conflicts
• ✅ Super Simple API - Four-line setup for multiple sensors
• ✅ Real-world units - Use volts, celsius, RPM directly
• ✅ Interrupt-friendly - Works alongside pin interrupts and other time-sensitive code
• ✅ Multiple sensors - Up to 4 sensors automatically managed
• ✅ Zero configuration - Works out-of-the-box with sensible defaults
• ✅ Lightweight - Minimal memory footprint
• ✅ Debug support - Built-in diagnostic output

#include <EveryIBus.h>
EveryIBus ibus;
void setup() {
 ibus.begin(); // That's it!
}
void loop() {
 ibus.update(); // Handle protocol
 
 // Set sensor values with real-world units
 ibus.setInternalVoltage(5.08); // 5.08V
 ibus.setExternalVoltage(12.41); // 12.41V 
 ibus.setTemperature(21.12); // 21.12°C
 ibus.setRPM(4294); // 4294 RPM
}

That's it! Your FS-i6 transmitter will show IntV, ExtV, Temp, and RPM with the values you set.

Arduino Nano Every FlySky FS-iA6B
┌─────────────────┐ ┌──────────────┐
│ D0 │──────→│ SENS (RX) │
│ D1 │──1kΩ─→│ SENS (TX) │ 
│ GND │──────→│ GND │
└─────────────────┘ └──────────────┘

Important: Use a 1kΩ resistor on the TX line (D1) to prevent damage.

• ✅ Arduino Nano Every (ATmega4809) - Primary target
• ✅ FlySky FS-iA6B receiver - Tested and confirmed
• ✅ FlySky FS-i6/FS-i6X transmitter - Shows all sensor types
• ❓ Other megaAVR boards - Should work but untested

#include <EveryIBus.h>
EveryIBus ibus;
void setup() {
 ibus.begin();
}
void loop() {
 ibus.update();
 
 // Your sensor readings here
 float batteryVoltage = analogRead(A0) * (5.0 / 1023.0);
 ibus.setInternalVoltage(batteryVoltage);
}

#include <EveryIBus.h>
EveryIBus ibus;
volatile int rpmCounter = 0;
void setup() {
 ibus.begin();
 attachInterrupt(digitalPinToInterrupt(2), rpmISR, RISING);
}
void loop() {
 ibus.update(); // Non-blocking, interrupt-safe
 
 // Calculate RPM from interrupt counter
 static uint32_t lastRpmCalc = 0;
 if (millis() - lastRpmCalc > 1000) {
 uint16_t rpm = rpmCounter * 60; // Convert to RPM
 ibus.setRPM(rpm);
 rpmCounter = 0;
 lastRpmCalc = millis();
 }
}
void rpmISR() {
 rpmCounter++;
}

#include <EveryIBus.h>
#include <Adafruit_INA260.h>
EveryIBus ibus;
Adafruit_INA260 ina260 = Adafruit_INA260();
void setup() {
 ibus.begin();
 ina260.begin();
}
void loop() {
 ibus.update();
 
 // Read real sensor data
 float voltage = ina260.readBusVoltage();
 float current = ina260.readCurrent();
 
 // Send to transmitter
 ibus.setExternalVoltage(voltage);
 // Convert current to another sensor type if needed
}

1. Open Arduino IDE
2. Go to Sketch → Include Library → Manage Libraries
3. Search for "EveryIBus"
4. Click Install

1. Download the latest release from Releases
2. Extract to Arduino/libraries/EveryIBus/
3. Restart Arduino IDE

cd ~/Arduino/libraries/
git clone https://github.com/yourusername/EveryIBus.git

No telemetry on transmitter:

1. Check wiring (especially the 1kΩ resistor on TX)
2. Verify ground connection between Arduino and receiver
3. Enable debug: ibus.setDebug(true) and check Serial Monitor
4. Look for "DISCOVERY [SENT]" messages in debug output

Irregular telemetry:

1. Ensure ibus.update() is called frequently in loop()
2. Avoid long delay() calls in main loop
3. Check for interrupt conflicts with other libraries

Compilation errors:

1. Ensure you selected "Arduino Nano Every" as the board
2. Verify library is installed correctly
3. Restart Arduino IDE

Contributions are welcome! Please:

1. Fork the repository
2. Create a feature branch (git checkout -b feature/amazing-feature)
3. Test thoroughly on Arduino Nano Every hardware
4. Commit your changes (git commit -m 'Add amazing feature')
5. Push to the branch (git push origin feature/amazing-feature)
6. Open a Pull Request

This project is licensed under the MIT License - see the LICENSE file for details.

• Betaflight project for iBUS protocol documentation
• FlySky community for protocol reverse engineering
• Arduino community for continuous support
• IBusBM library authors for inspiration (even though it doesn't work on Nano Every 😅)

• 🐛 Bug reports: GitHub Issues
• 💡 Feature requests: GitHub Issues
• 📖 Documentation: Wiki
• 💬 Discussions: GitHub Discussions

Made with ❤️ for the Arduino Nano Every community

Finally, iBUS telemetry that just works!