Hey,
i'm pretty new to the whole arduino world and coming from mechanical engineering, so propably a lot of my coding is not best practice..
I'm currently working on a project, where i want to measure accelerometer Data while brushing teeth. On a long way of getting used with arduinos and searching for a good low power solution (The toothbrush should last for at least 30 days in standby while measuring 2x3min per day) i came to use the ESP32 because of low deep sleep current.
For the IMU i started with the MPU6050, but the breakoutboard i had drew way to much current in deep sleep. Thats why i switched to the BMI160. Unfortunatly the only library which is working for me is the DFRobot one.. I can get the values, and print them in an csv file with ~40Hz. The problem is, for me it would be gould to get at least 100Hz as a sample rate. I managed to set the BMI to a Accelrate of 1600Hz but the code just still slows down. I feel, that the method i use within the DFRobot lib just is slow?
When i try to implement your BMI160.h it wont work.. I can #include it and create a class frome it "BMI160Class bmi160;" without error but as soon as i try to use one of the methods it gives me errors and "error while compiling for the Board ESP32 Dev Module"
I really don't know if it is my bad practice gere or if it just won't work for the ESP32? :(
here is the code for the DFRobot lib which works just fine for me:
#include <DFRobot_BMI160.h>
#include "FS.h"
#include "SD.h"
#include "SPI.h"
#define Threshold 80
DFRobot_BMI160 bmi160;
const int8_t i2c_addr = 0x69;
void callback(){
}
void setupSDCard(){
if(!SD.begin()){
return;
}
uint8_t cardType = SD.cardType();
if(cardType == CARD_NONE){
return;
}
}
void setupBMI(){
//init the hardware bmin160
if (bmi160.softReset() != BMI160_OK){
while(1);
}
//set and init the bmi160 i2c address
if (bmi160.I2cInit(i2c_addr) != BMI160_OK){
while(1);
}
}
void setupTouch(){
}
void setup(){
Serial.begin(115200);
touch_pad_init();
touch_pad_deinit();
setupSDCard();
setupBMI();
if(!SD.exists("/data.csv")){
File file = SD.open("/data.txt" ,FILE_APPEND);
file.print("Time in millis;Gx;Gy;Gz;X;Y;Z\n");
file.close();
}
}
void loop(){
int i = 0;
int rslt;
int16_t accelGyro[6]={0};
//get both accel and gyro data from bmi160
//parameter accelGyro is the pointer to store the data
unsigned long check = millis();
File file = SD.open("/data.txt" ,FILE_APPEND);
Serial.println("while");
while(touchRead(T3) < Threshold){
//get data, as long as touch pin T3 is touched
//Gets the data
rslt = bmi160.getAccelGyroData(accelGyro);
if(rslt == 0){
file.print(millis());file.print(";");
file.print(accelGyro[0]*3.14/180.0);file.print(";");
file.print(accelGyro[1]*3.14/180.0);file.print(";");
file.print(accelGyro[2]*3.14/180.0);file.print(";");
file.print(accelGyro[3]/16384.0);file.print(";");
file.print(accelGyro[4]/16384.0);file.print(";");
file.print(accelGyro[5]/16384.0);file.print(";");
file.print("\n");
}
}
file.print("logging end");
file.close();
Serial.println("Going to sleep");
SD.end();
touchAttachInterrupt(T3, callback, Threshold);
esp_sleep_enable_touchpad_wakeup();
esp_deep_sleep_start();
}`
Hey, i'm pretty new to the whole arduino world and coming from mechanical engineering, so propably a lot of my coding is not best practice.. I'm currently working on a project, where i want to measure accelerometer Data while brushing teeth. On a long way of getting used with arduinos and searching for a good low power solution (The toothbrush should last for at least 30 days in standby while measuring 2x3min per day) i came to use the ESP32 because of low deep sleep current.
For the IMU i started with the MPU6050, but the breakoutboard i had drew way to much current in deep sleep. Thats why i switched to the BMI160. Unfortunatly the only library which is working for me is the DFRobot one.. I can get the values, and print them in an csv file with ~40Hz. The problem is, for me it would be gould to get at least 100Hz as a sample rate. I managed to set the BMI to a Accelrate of 1600Hz but the code just still slows down. I feel, that the method i use within the DFRobot lib just is slow?
When i try to implement your BMI160.h it wont work.. I can #include it and create a class frome it "BMI160Class bmi160;" without error but as soon as i try to use one of the methods it gives me errors and "error while compiling for the Board ESP32 Dev Module"
I really don't know if it is my bad practice gere or if it just won't work for the ESP32? :(
here is the code for the DFRobot lib which works just fine for me: