ESP8266 and BMI160 sensor example

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.

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

 

Wemos pin Module Pin
3v3 3v3
Gnd Gnd
SDA/D2 SDA
SCL/D1 SCL

Code

This example used the following library – https://github.com/hanyazou/BMI160-Arduino

#include <BMI160Gen.h>
 
const int select_pin = 10;
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);
}

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
CJMCU-160I BMI160 latest inertial measurement sensor attitude module 6DOF

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