bmi160

Hi, I bought bosh bmi160 Gyro & accelerometer but I couldnt find any module in espruino module page. I did some research found docs for sensor. I tried i2c connection I am able to write data and see data changing with different commands given in docs. The problem is when I read console by interval function I get uint8Array I dont know what to do with it I tried to convert to hex I got different data with different commands. According to Bosh Docs (I put link to bottom) if I send 0x00 I will read chipId I sended code with following code

I2C1.setup({ scl : NodeMCU.D6, sda: NodeMCU.D5});

function toHexString (byteArray) {
  const chars = new Uint8Array(byteArray.length * 2);
  const alpha = 'a'.charCodeAt(0) - 10;
  const digit = '0'.charCodeAt(0);

  let p = 0;
  for (let i = 0; i < byteArray.length; i++) {
      let nibble = byteArray[i] >>> 4;
      chars[p++] = nibble > 9 ? nibble + alpha : nibble + digit;
      nibble = byteArray[i] & 0xF;
      chars[p++] = nibble > 9 ? nibble + alpha : nibble + digit;    
  }
  return String.fromCharCode.apply(null, chars);
}

setInterval(function() {
    var uint = I2C1.readFrom(0x69,16);
    var hex = toHexString(uint);
    console.log(uint);
    console.log(hex);
})

Result:

d1210000000000000000000000000000

new Uint8Array([209, 33, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0])
...

https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bmi160-ds000.pdf#page=19

Sorry about my english I tried my best

Hi,

check the BoschSenortec github account, there is a completely BMI160 driver written in c (rewriting c code to javascript is not that hard).

Hint: Start with Init the sensor and then try to Read some values.

You are on the right way, the 209 decimal in the response is 0b11010001 as shown on the datasheet screenshot!

Thank you for all responses,

They read the sensor ready data like this

        rslt = bme280_set_regs(&reg_addr, &soft_rst_cmd, 1, dev);

       (rslt == BME280_OK)
       //BME280_OK = INT8_C(0)

I did:

var ERR_REG = 0x02;//According to docs at page 49
 var adr = 0x69;
 var len = 5;// 
I2C1.writeTo(adr,ERR_REG);
  var response = toHexString(I2C1.readFrom(adr,16)).slice(0,len);
   //Response = 00000

If the data is correct 5 zero bit is tells sensor is working correct

But when I tried to get chip id with same code with len = 7 I get 1414240 (Without converting to hex [ 20, 20, 36, 4, 10, 24, 72 ]). In the driver I must get UINT8_C(0x60) or 0x60 the thing is is 0x60 equal to 1414240 ? or am I converting wrong?