The BMI160 is a small, low power, low noise 16-bit inertial measurement unit designed for use in mobile applications like augmented reality or indoor navigation which require highly accurate, real-time sensor data.
bmi160 module
In full operation mode, with both the accelerometer and gyroscope enabled, the current consumption is typically 950 μA, enabling always-on applications in battery driven devices. It is available in a compact 14-pin 2.5 x 3.0 x 0.8 mm³ LGA package.
Features
| Parameter | Technical data |
|---|---|
| Digital resolution | Accelerometer (A): 16 bit Gyroscope (G): 16bit |
| Measurement ranges (programmable) |
(A): ± 2 g, ± 4 g, ± 8 g, ± 16 g (G): ± 125°/s, ± 250°/s, ± 500°/s, ± 1000°/s, ± 2000°/s |
| Sensitivity (calibrated) | (A): ±2g: 16384LSB/g ±4g: 8192LSB/g ±8g: 4096LSB/g ±16g: 2048LSB/g (G): ±125°/s: 262.4 LSB/°/s ±250°/s: 131.2 LSB/°/s ±500°/s: 65.6 LSB/°/s ±1000°/s: 32.8 LSB/°/s ±2000°/s: 16.4 LSB/°/s |
| Zero-g offset (typ., over life-time) | (A): ±40mg (G): ± 10°/s |
| Noise density (typ.) | (A): 180 μg/√Hz (G): 0.008 °/s/√Hz |
| Bandwidths (programmable) | 1600 Hz … 25/32 Hz |
| Digital inputs/outputs | SPI, I²C, 4x digital interrupts |
| Supply voltage (VDD) | 1.71 … 3.6 V |
| I/0 supply voltage (VDDIO) | 1.2 … 3.6 V |
| Temperature range | -40 … +85°C |
| Current consumption – full operation – low-power mode |
950 μA 3 μA |
| FIFO data buffer | 1024 byte |
| LGA package | 2.5 × 3.0 × 0.8 mm³ |
| Shock resistance | 10,000 g x 200 μs |
Connection
| MICROBIT pin | Module Pin |
| 3v3 | 3v3 |
| Gnd | Gnd |
| SDA – P20 | SDA |
| SCL – P19 | SCL |
| P0 | int1 |
Code
This example used the following library – https://github.com/hanyazou/BMI160-Arduino
[codesyntax lang=”cpp”]
#include <BMI160Gen.h>
const int select_pin = 0;
const int i2c_addr = 0x69;
void setup() {
Serial.begin(9600); // initialize Serial communication
while (!Serial); // wait for the serial port to open
// initialize device
//BMI160.begin(BMI160GenClass::SPI_MODE, select_pin);
BMI160.begin(BMI160GenClass::I2C_MODE, i2c_addr);
}
void loop() {
int gx, gy, gz; // raw gyro values
// read raw gyro measurements from device
BMI160.readGyro(gx, gy, gz);
// display tab-separated gyro x/y/z values
Serial.print("g:\t");
Serial.print(gx);
Serial.print("\t");
Serial.print(gy);
Serial.print("\t");
Serial.print(gz);
Serial.println();
delay(500);
}
[/codesyntax]
Output
Open the serial monitor
g: 90 86 9
g: 69 69 40
g: 35 97 -9
g: -7370 3961 -1786
g: -31829 -2652 32767
g: -3221 25109 32767
g: 26020 31878 -26125
g: -20332 -21698 -15712
g: -7297 3463 -1723
g: -1137 1521 420
g: -203 305 96
g: 144 -102 54
g: 77 116 35
Links
https://ae-bst.resource.bosch.com/media/_tech/media/datasheets/BST-BMI160-DS000-07.pdf
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