ET-S04
BNO085 9-DoF Orientation IMU
On-chip sensor fusion: quaternions, heading, steps
AED 79.00
Out of stockOverview
On-chip sensor fusion: quaternions, heading, steps
The ET-S04 is built around the CEVA BNO085 — accel + gyro + mag + Cortex-M0+ running SH-2 fusion firmware. It connects over I²C 0x4A (default) / 0x4B (JP3); UART-RVC mode via JP4 and is powered from VIN 3.3–5.5V, onboard LDO.
Two Qwiic / STEMMA QT connectors let you chain it with other boards without soldering, and the 2.54 mm header fits a breadboard.
Designed in Dubai by ElectroTrical — the full schematic, BOM and design notes are published below.
Good for
- Robot and drone orientation
- VR and head tracking
- Gesture and activity detection
Key features
What makes it different
Sensor
CEVA BNO085: accel + gyro + mag + Cortex-M0+ running SH-2 fusion firmware
Outputs
Rotation vector (quaternion), game RV, linear accel, gravity, step counter, tap, stability
Interface
I2C 0x4A (default) / 0x4B (JP3); UART-RVC mode via JP4
Supply
VIN 3.3–5.5V, onboard LDO
Qwiic / STEMMA QT
Two JST-SH connectors plus a 2.54 mm header — 3.3 V and 5 V hosts.
Open documentation
Schematic, BOM and layout notes published for every board.
Specifications
Technical specifications
| Sensor | CEVA BNO085: accel + gyro + mag + Cortex-M0+ running SH-2 fusion firmware |
|---|---|
| Outputs | Rotation vector (quaternion), game RV, linear accel, gravity, step counter, tap, stability |
| Interface | I2C 0x4A (default) / 0x4B (JP3); UART-RVC mode via JP4 |
| Supply | VIN 3.3–5.5V, onboard LDO |
| Size | 25.4 × 17.8 mm |
|---|---|
| Mounting | 4 × M2.5 holes, 2.54 mm from each corner |
| Connectors | 2 × Qwiic / STEMMA QT (JST SH 4-pin) · 7-pin 2.54 mm header |
| Main IC | BNO085 (LCSC C5189642) |
| Revision | Rev B |
| Libraries | Adafruit_BNO08x / CircuitPython adafruit_bno08x, SparkFun BNO08x |
|---|
| JP1 (default Closed) | Cut to turn off the LED |
|---|---|
| JP2 (default Closed) | Cut to remove the host-side I2C pull-ups |
| JP3 (default Open) | Bridge → SA0=3V3 → address 0x4B |
| JP4 (default Open) | Bridge → PS0=3V3 → UART-RVC mode (simple 100Hz heading/pitch/roll stream) |
Performance
Fused outputs and their speed
Pinout
Pin map and connections
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VIN | Power | Power in (3.3–5 V) |
| 2 | 3V3 | Power | 3.3 V regulator output |
| 3 | GND | Ground | Ground |
| 4 | SCL | I²C | UART-RVC mode: RX into BNO |
| 5 | SDA | I²C | UART-RVC mode: TX from BNO |
| 6 | INT | Output | Active-low data ready, host level |
| 7 | RST | Control | Active-low reset, host level |
Qwiic / STEMMA QT pins: GND, VIN, SDA, SCL (same on both connectors). I²C pull-ups (10 kΩ) are on the board; cut JP2 to remove them.
Mechanical
Dimensions and what's in the box
In the box
- 1 × ET-S04 BNO085 9-DoF Orientation IMU (assembled)
- 1 × 7-pin 2.54 mm male header, unsoldered
Getting started
- Plug in a Qwiic / STEMMA QT cable, or solder the header and wire VIN, GND, SDA and SCL
- Libraries: Adafruit_BNO08x / CircuitPython adafruit_bno08x, SparkFun BNO08x
- Run an I²C scanner to confirm the address: 0x4A, 0x4B
Compare
Which motion sensor?
| BNO085 9-DoF Orientation IMU (this board)This board | ET-S26 LSM6DSOX 6-DoF IMU | ET-S27 ICM-42688-P Low-Noise IMU | ET-S29 ADXL345 ±16 g Accelerometer | |
|---|---|---|---|---|
| What it does | On-chip sensor fusion: quaternions, heading, steps | Accelerometer + gyro with machine-learning core | Flight-controller grade 6-DoF IMU | 3-axis digital accelerometer, I²C/SPI |
| Interface | I²C 0x4A (default) / 0x4B (JP3); UART-RVC mode… | I²C 0x6A / 0x6B (JP3), INT1/INT2 | I²C 0x68/0x69 through shifters (Qwiic) or direct… | I²C 0x53 (default) / 0x1D, INT1/INT2 |
| Best for | Robot and drone orientation | Activity and gesture recognition | Drone and FPV flight controllers | Tilt and tap detection |
| Price | 79 AED | 39 AED | 49 AED | 59 AED |
Downloads
Documents and design files
Need a custom version of this board?
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