VEML6075 nodejs lib

VEML6075 from Vishay is an UVA UVB and UV_INDEX sensor.

Here is the setup i found in an old project, not being able to challenge it for now:

VIS and IR coefficients for a non-covered (i.e. open-air, non-diffused -> no glass or teflon filter) designs like the Adafruit breakout, as per the VEML6075 datasheet:

• uva_a_coef = 2.22; // Default value for the UVA VIS coefficient ("a")

• uva_b_coef = 1.33; // Default value for the UVA IR coefficient ("b")

• uvb_c_coef = 2.95; // Default value for the UVB VIS coefficient ("c")

• uvb_d_coef = 1.74; // Default value for the UVB IR coefficient ("d")

• uva_resp = **0.001461; // UVA response

• uvb_resp = **0.002591; // UVB response

• uva_adjusted = Math.round(uva - (this.uva_a_coef * uvcomp1) - (this.uva_b_coef * uvcomp2));

• uvb_adjusted = Math.round(uvb - (this.uvb_c_coef * uvcomp1) - (this.uvb_d_coef * uvcomp2));

• uv_index = ((uva_adjusted * this.uva_resp) + (uvb_adjusted * this.uvb_resp)) / 2;

Dependencies

Using I2C to communicate with device, use i2c-bus library

Get()

function returns array with 4 values :

• uva_adjusted
• uvb_adjusted
• uv_index
• uv_index_level

const i2c = require('i2c-bus');
const veml = require('veml6075');

var opts = {
  address:0x10
}

const i2cBus = i2c.openSync(1);
var veml_ = new veml(i2cBus,opts);
  
var result = veml_.Get();

console.log(result);