st-anything/lib/DallasTemperature/examples/UserDataDemo/UserDataDemo.ino

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2023-03-11 14:11:03 +00:00
//
// FILE: UserDataDemo.ino
// AUTHOR: Rob Tillaart
// VERSION: 0.1.0
// PURPOSE: use of alarm field as user identification demo
// DATE: 2019-12-23
// URL:
//
// Released to the public domain
//
#include <OneWire.h>
#include <DallasTemperature.h>
#define ONE_WIRE_BUS 2
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);
uint8_t deviceCount = 0;
// Add 4 prepared sensors to the bus
// use the UserDataWriteBatch demo to prepare 4 different labeled sensors
struct
{
int id;
DeviceAddress addr;
} T[4];
float getTempByID(int id)
{
for (uint8_t index = 0; index < deviceCount; index++)
{
if (T[index].id == id)
{
return sensors.getTempC(T[index].addr);
}
}
return -999;
}
void printAddress(DeviceAddress deviceAddress)
{
for (uint8_t i = 0; i < 8; i++)
{
// zero pad the address if necessary
if (deviceAddress[i] < 16) Serial.print("0");
Serial.print(deviceAddress[i], HEX);
}
}
void setup(void)
{
Serial.begin(115200);
Serial.println(__FILE__);
Serial.println("Dallas Temperature Demo");
sensors.begin();
// count devices
deviceCount = sensors.getDeviceCount();
Serial.print("#devices: ");
Serial.println(deviceCount);
// Read ID's per sensor
// and put them in T array
for (uint8_t index = 0; index < deviceCount; index++)
{
// go through sensors
sensors.getAddress(T[index].addr, index);
T[index].id = sensors.getUserData(T[index].addr);
}
// Check all 4 sensors are set
for (uint8_t index = 0; index < deviceCount; index++)
{
Serial.println();
Serial.println(T[index].id);
printAddress(T[index].addr);
Serial.println();
}
Serial.println();
}
void loop(void)
{
Serial.println();
Serial.print(millis());
Serial.println("\treq temp");
sensors.requestTemperatures();
Serial.print(millis());
Serial.println("\tGet temp by address");
for (int i = 0; i < 4; i++)
{
Serial.print(millis());
Serial.print("\t temp:\t");
Serial.println(sensors.getTempC(T[i].addr));
}
Serial.print(millis());
Serial.println("\tGet temp by ID"); // assume ID = 0, 1, 2, 3
for (int id = 0; id < 4; id++)
{
Serial.print(millis());
Serial.print("\t temp:\t");
Serial.println(getTempByID(id));
}
delay(1000);
}
// END OF FILE