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Arduino code for reading a TSL2561 and a ds18S20
#include <OneWire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_TSL2561_U.h>
int DS18S20_Pin = 3;
OneWire ds(DS18S20_Pin);
Adafruit_TSL2561_Unified tsl = Adafruit_TSL2561_Unified(TSL2561_ADDR_FLOAT, 12345);
void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
if(!tsl.begin())
{
/* There was a problem detecting the ADXL345 ... check your connections */
Serial.print("Ooops, no TSL2561 detected ... Check your wiring or I2C ADDR!");
while(1);
}
}
void loop() {
float temperature = getTemperature();
/* Get a new sensor event */
sensors_event_t event;
tsl.getEvent(&event);
Serial.print("{\"temperature\":");
Serial.print(temperature);
Serial.print(", \"light\":");
Serial.print(event.light);
Serial.print("}\n");
delay(5000);
}
/**************************************************************************/
/*
Configures the gain and integration time for the TSL2561
*/
/**************************************************************************/
void configureSensor(void)
{
/* You can also manually set the gain or enable auto-gain support */
// tsl.setGain(TSL2561_GAIN_1X); /* No gain ... use in bright light to avoid sensor saturation */
// tsl.setGain(TSL2561_GAIN_16X); /* 16x gain ... use in low light to boost sensitivity */
//tsl.enableAutoGain(true); /* Auto-gain ... switches automatically between 1x and 16x */
/* Changing the integration time gives you better sensor resolution (402ms = 16-bit data) */
tsl.setIntegrationTime(TSL2561_INTEGRATIONTIME_13MS); /* fast but low resolution */
//tsl.setIntegrationTime(TSL2561_INTEGRATIONTIME_101MS); /* medium resolution and speed */
//tsl.setIntegrationTime(TSL2561_INTEGRATIONTIME_402MS); /* 16-bit data but slowest conversions */
}
float getTemperature() {
//returns the temperature from one DS18S20 in DEG Celsius
byte data[12];
byte addr[8];
if ( !ds.search(addr)) {
//no more sensors on chain, reset search
ds.reset_search();
return -1000;
}
if ( OneWire::crc8( addr, 7) != addr[7]) {
Serial.println("CRC is not valid!");
return -1000;
}
if ( addr[0] != 0x10 && addr[0] != 0x28) {
Serial.print("Device is not recognized");
return -1000;
}
ds.reset();
ds.select(addr);
ds.write(0x44, 1); // start conversion, with parasite power on at the end
byte present = ds.reset();
ds.select(addr);
ds.write(0xBE); // Read Scratchpad
for (int i = 0; i < 9; i++) { // we need 9 bytes
data[i] = ds.read();
}
ds.reset_search();
byte MSB = data[1];
byte LSB = data[0];
float tempRead = ((MSB << 8) | LSB); //using two's compliment
float TemperatureSum = tempRead / 16;
return TemperatureSum;
}
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