💬 Button size radionode with sensors swarm extension

Koresh

@bjornhallberg I do not know exactly, but I don't think there should be any fees. Try to find out tomorrow.

alexsh1

@Koresh I got one of boards and would like to add Si1132-A10-GMR. What else I need to add? C8?
Why are you not using this sensor on your board?

Koresh

@alexsh1 yes, you should solder the sensor and the bypass capacitor. I have a lot of si1132 sensors, but I can't find the correct library. Almost promo videos of commertial sensors based on the si1132 shows incorrect data ))) It shows correct UV and IR level, but incorrect visible light value. So I decided to not solder this sensor yet.

alexsh1

@Koresh I would only use it for UV so this is good for me.

No need to use a lib:

// Distributed with a free-will license.
// Use it any way you want, profit or free, provided it fits in the licenses of its associated works.
// SI1132
// This code is designed to work with the SI1132_I2CS I2C Mini Module available from ControlEverything.com.
// https://www.controleverything.com/content/Light?sku=SI1132_I2CS#tabs-0-product_tabset-2

#include<Wire.h>

// SI1132 I2C address is 0x60(96)
#define Addr 0x60

int response = 0;
void setup()
{
  // Initialise I2C communication as MASTER
  Wire.begin();
  // Initialise Serial Communication, Baud rate = 9600
  Serial.begin(9600);

  // Enable UVindex measurement coefficients
  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select COFF-1 register
  Wire.write(0x13);
  // Default value
  Wire.write(0x29);
  // Stop I2C Transmission
  Wire.endTransmission();

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select COFF-2 register
  Wire.write(0x14);
  // Default value
  Wire.write(0x89);
  // Stop I2C Transmission
  Wire.endTransmission();

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select COFF-3 register
  Wire.write(0x15);
  // Default value
  Wire.write(0x02);
  // Stop I2C Transmission
  Wire.endTransmission();

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select COFF-4 register
  Wire.write(0x16);
  // Default value
  Wire.write(0x00);
  // Stop I2C Transmission
  Wire.endTransmission();


  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select PARAM_WR register
  Wire.write(0x17);
  // Enable uv, Visible, IR
  Wire.write(0xF0);
  // Stop I2C Transmission
  Wire.endTransmission();


  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select command register
  Wire.write(0x18);
  // Select CHLIST register in RAM
  Wire.write(0x01 | 0xA0);
  // Stop I2C Transmission
  Wire.endTransmission();
  delay(10);

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select PARAM_RD register
  Wire.write(0x2E);
  // Stop I2C Transmission
  Wire.endTransmission();

  // Request 1 byte of data
  Wire.requestFrom(Addr, 1);
  // Read 1 byte of data
  response = Wire.read();

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select HW_KEY register
  Wire.write(0x07);
  // Default value
  Wire.write(0x17);
  // Stop I2C Transmission
  Wire.endTransmission();

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select PARAM_WR register
  Wire.write(0x17);
  // Small IR photodiode
  Wire.write(0x00);
  // Stop I2C Transmission
  Wire.endTransmission();

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select COMMAND register
  Wire.write(0x18);
  // Select ALS_IR_ADCMUX register in RAM
  Wire.write(0x0E | 0xA0);
  // Stop I2C Transmission
  Wire.endTransmission();
  delay(10);

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select PARAM_RD register
  Wire.write(0x2E);
  // Stop I2C Transmission
  Wire.endTransmission();

  // Request 1 byte of data
  Wire.requestFrom(Addr, 1);
  // Read 1 byte of data
  response = Wire.read();

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select PARAM_WR register
  Wire.write(0x17);
  // Set ADC Clock divided / 1
  Wire.write(0x00);
  // Stop I2C Transmission
  Wire.endTransmission();

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select COMMAND register
  Wire.write(0x18);
  // Select ALS_IR_ADC_GAIN register in RAM
  Wire.write(0x1E | 0xA0);
  // Stop I2C Transmission
  Wire.endTransmission();
  delay(10);

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select PARAM_RD register
  Wire.write(0x2E);
  // Stop I2C Transmission
  Wire.endTransmission();

  // Request 1 byte of data
  Wire.requestFrom(Addr, 1);
  // Read 1 byte of data
  response = Wire.read();

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select PARAM_WR register
  Wire.write(0x17);
  // Set 511 ADC Clock
  Wire.write(0x70);
  // Stop I2C Transmission
  Wire.endTransmission();

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select COMMAND register
  Wire.write(0x18);
  // Select ALS_IR_ADC_COUNTER register in RAM
  Wire.write(0x1D | 0xA0);
  // Stop I2C Transmission
  Wire.endTransmission();
  delay(10);

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select PARAM_RD register
  Wire.write(0x2E);
  // Stop I2C Transmission
  Wire.endTransmission();

  // Request 1 byte of data
  Wire.requestFrom(Addr, 1);
  // Read 1 byte of data
  response = Wire.read();

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select PARAM_WR register
  Wire.write(0x17);
  // Set ADC Clock divided / 1
  Wire.write(0x00);
  // Stop I2C Transmission
  Wire.endTransmission();

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select COMMAND register
  Wire.write(0x18);
 // Select ALS_VIS_ADC_GAIN register in RAM
  Wire.write(0x11 | 0xA0);
  // Stop I2C Transmission
  Wire.endTransmission();
  delay(10);

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select PARAM_RD register
  Wire.write(0x2E);
  // Stop I2C Transmission
  Wire.endTransmission();

  // Request 1 byte of data
  Wire.requestFrom(Addr, 1);
  // Read 1 byte of data
  response = Wire.read();

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select PARAM_WR register
  Wire.write(0x17);
  // High Signal Range
  Wire.write(0x20);
  // Stop I2C Transmission
  Wire.endTransmission();

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select COMMAND register
  Wire.write(0x18);
  // Select ALS_IR_ADC_MISC register in RAM
  Wire.write(0x1F | 0xA0);
  // Stop I2C Transmission
  Wire.endTransmission();
  delay(10);

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select PARAM_RD register
  Wire.write(0x2E);
  // Stop I2C Transmission
  Wire.endTransmission();

  // Request 1 byte of data
  Wire.requestFrom(Addr, 1);
  // Read 1 byte of data
  response = Wire.read();

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select PARAM_WR register
  Wire.write(0x17);
  // Set 511 ADC Clock
  Wire.write(0x70);
  // Stop I2C Transmission
  Wire.endTransmission();

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select COMMAND register
  Wire.write(0x18);
  // Select ALS_VIS_ADC_COUNTER register in RAM
  Wire.write(0x10 | 0xA0);
  // Stop I2C Transmission
  Wire.endTransmission();
  delay(10);

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select PARAM_RD register
  Wire.write(0x2E);
  // Stop I2C Transmission
  Wire.endTransmission();

  // Request 1 byte of data
  Wire.requestFrom(Addr, 1);
  // Read 1 byte of data
  response = Wire.read();

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select PARAM_WR register
  Wire.write(0x17);
  // High Signal Range
  Wire.write(0x20);
  // Stop I2C Transmission
  Wire.endTransmission();

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select COMMAND register
  Wire.write(0x18);
  // Select ALS_VIS_ADC_MISC register in RAM
  Wire.write(0x12 | 0xA0);
  // Stop I2C Transmission
  Wire.endTransmission();
  delay(10);

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select PARAM_RD register
  Wire.write(0x2E);
  // Stop I2C Transmission
  Wire.endTransmission();

  // Request 1 byte of data
  Wire.requestFrom(Addr, 1);
  // Read 1 byte of data
  response = Wire.read();
  delay(300);
}
void loop()
{
  unsigned int data[4];

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select COMMAND register
  Wire.write(0x18);
  // Start ALS conversion
  Wire.write(0x0E);
  // Stop I2C Transmission
  Wire.endTransmission();
  delay(500);

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select data register
  Wire.write(0x22);
  // Stop I2C Transmission
  Wire.endTransmission();
  
  // Request 4 byte of data
  Wire.requestFrom(Addr, 4);

  // Read 4 bytes of data
  // visible lsb, visible msb, ir lsb, ir msb
  if (Wire.available() == 4)
  {
    data[0] = Wire.read();
    data[1] = Wire.read();
    data[2] = Wire.read();
    data[3] = Wire.read();
  }

  float visible = (data[1] * 256.0 + data[0]);
  float ir = (data[3] * 256 + data[2]);

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select data register
  Wire.write(0x2C);
  // Stop I2C Transmission
  Wire.endTransmission();
  
  // Request 2 bytes of data
  Wire.requestFrom(Addr, 2);

  // Read 2 bytes of data
  // uv lsb, uv msb
  if (Wire.available() == 2)
  {
    data[0] = Wire.read();
    data[1] = Wire.read();
  }
  // Convert the data
  float uv = (data[1] * 256 + data[0]);

  // Output data to screen
  Serial.print("Visible Light of Source : ");
  Serial.print(visible);
  Serial.println(" lux");
  Serial.print("IR Of Source : ");
  Serial.print(ir);
  Serial.println(" lux");
  Serial.print("UV Of the Source : ");
  Serial.print(uv);
  Serial.println(" lux");
  delay(500);
}

alexsh1

@Koresh BTW, Found this library - working fine for my needs

https://github.com/hardkernel/WEATHER-BOARD/tree/master/libraries/ODROID_Si1132

I am using this sensor purely for UV Index.

PS Got your sensor. Soldered it to the mote. Works just fine

alexsh1

@Koresh I can see Si1132 visible light is twice more than BH1750.
Not sure what's wrong, but as you said it reports incorrect value.

UV Index is in line with VEML6070

alexsh1

The sensor looks more complicated that I thought:

2.2. Ambient Light
The Si1132 has photodiodes capable of measuring both vi
sible and infrared light. Howe
ver, the visible photodiode
is also influenced by infrared light. The measurement of illuminance require
s the same spectral response as the
human eye. If an accurate lux measurement is desired, the
extra IR response of the vi
sible-light photodiode must
be compensated. Therefore, to allow the host to make corrections to the infrared light’s influence, the Si1132
reports the infrared light measurement on a separate channel. The separate visible and IR photodiodes lend
themselves to a variety of algorithmic solutions. The
host can then take these two measurements and run an
algorithm to derive an equivalent lux level as perceive
d by a human eye. Having
the IR correction algorithm
running in the host a
llows for the most flexibility in adjusting for system-dependent
variables. For example, if the
glass used in the system blocks visibl
e light more than infrared light, the
IR correction needs to be adjusted.

I will have to spend more time to understand how to extract the correct ambient light

yury

This post is deleted!

alexsh1

The sketch I posted above contains some errors
(it sets COFFs 0x29, 0x89, 0x02 and 0x00 to the 0x13, 0x14, 0x15 and 0x16 registers).

The correct UCOEF values are 0x7B, 0x6B, 0x01, and 0x00

The sensor is quite complex.

alexsh1

I got the following values from the sensor:

V_VOLTAGE (3.21)
V_HUM (51
V_TEMP (30)
V_LIGHT_LEVEL (4466)
V_UV (1.74)
V_LIGHT_LEVEL (3367)
V_LIGHT_LEVEL (3367)

Clearly, Si1132 is not in line with BH1750. VEML6075 is giving me UV Index 1.65, which is close to the Si1132.

Moreover, depending where it is used, the coeff in formula has to change (I am using 0.282 for the direct sunlight) :

Visible Photodiode 
Response

Sunlight
ALS_VIS_ADC_GAIN=0
VIS_RANGE=0
—
0.282

2500K incandescent bulb
ALS_VIS_ADC_GAIN=0
VIS_RANGE=0

0.319

“Cool white” fluorescent 
ALS_VIS_ADC_GAIN=0
VIS_RANGE=0

0.146

alexsh1

@Koresh My 2032 died in 2 days and I noticed that power consumption is 3.5mA. OK, maybe bad soldering - I desoldered Si1132, but the consumption is still 0.14mA while sleeping. For 2032 this is a huge consumption. Did you measure consumption at all? I am using CW radio

Si1132 must be consuming around < 500 nA standby current according to the datasheet. Not sure why consumption was increased with Si1132.

Koresh

@alexsh1 Do not forget put BH1750 into sleep mode. Unfortunatelly standart library do not put the sensor into this mode. I described it on the github page.

  /*  Please comment out private declaration in BH1750.h 
   *   Otherwise you can't call lightMeter.write8(BH1750_POWER_DOWN); and BH1750 will not sleep!
   *   
   *  //private:
   *   void write8(uint8_t data);
   */
   
  lightMeter.write8(BH1750_POWER_DOWN);

alexsh1

@Koresh I did it on the first day I got the sensor. The consumption above is with BH1750 in the sleeping mode as per your github

yury

@alexsh1 said in 💬 Button size radionode with sensors swarm extension:

it on the first day I got

Could you post the code you use? and links for the libs. we will check tomorrow consumption with your code . mysensors 2.0 or 2.2?

alexsh1

@yury It is the latest bh1750 lib -> https://github.com/claws/BH1750

I am using MySensors 2.2.0b

I am using a default code :
https://github.com/EasySensors/ButtonSizeNode/blob/master/ButtonSizeNode.ino

alexsh1

@yury One thing I did notice is this. To put BH1750 into a sleep mode (1uA consumption), it has to be called as follows:

void setup()  {
lightMeter.begin(BH1750_ONE_TIME_HIGH_RES_MODE);

}

After a one time measurement it goes to sleep automatically.
Please see -> https://github.com/claws/BH1750/blob/master/examples/BH1750advanced/BH1750advanced.ino

I have tried above, but still getting 0.14mA consumption in a sleep mode. Very odd!

Koresh

@alexsh1 Very strange. I can't see a method write8 in current lib version (https://github.com/claws/BH1750). So I can't understand how is it possible to compile default code with this string

lightMeter.write8(BH1750_POWER_DOWN);

I couldn't put this sensor into power down mode without this.

Koresh

@alexsh1 said in 💬 Button size radionode with sensors swarm extension:

...
After a one time measurement it goes to sleep automatically.
...
I have tried above, but still getting 0.14mA consumption in a sleep mode. Very odd!

I've read the claws library briefly again. I'm a litte doubt that this code:

_delay_ms(10);

is enough to ensure correctly timings and sensors work :)

alexsh1

@Koresh It does work, I have just test it, but there is a delay, i.e. the sensor is lagging one reading behind.

alexsh1

@Koresh said in 💬 Button size radionode with sensors swarm extension:

@alexsh1 Very strange. I can't see a method write8 in current lib version (https://github.com/claws/BH1750). So I can't understand how is it possible to compile default code with this string
lightMeter.write8(BH1750_POWER_DOWN);
I couldn't put this sensor into power down mode without this.

I tried it with the original (old) library -> https://github.com/mysensors/MySensorsArduinoExamples/tree/master/libraries/BH1750

I commended out "private" in bh1750.h
Consumption has not changed - 0.14mA

💬 Button size radionode with sensors swarm extension

8

11.7k

11.2k

113.1k