Autonomo One wire Dallas temperature DS18b20

1

Autonomo one wire example for the ds18b20

#include <OneWire.h>                              //Modified for cortex m0+
#include <DallasTemperature.h>

#define ONE_WIRE_BUS A7                           //Pin for the temp sensor
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);
float Temperature7;                               

void setup() {
  sensors.begin();                                //Start sensor
  SerialUSB.begin(9600);                          //Start Serial
}

void loop() {
  sensors.requestTemperatures();                  //Request temp
  SerialUSB.println(sensors.getTempCByIndex(0),2);//Print temp on serial line
  delay(1000);                                    //Delay to get some space in between readings
}

One Wire needs to be altered to include these registries for the cortex m0+

#define PIN_TO_BASEREG(pin)             (0)
#define PIN_TO_BITMASK(pin)             (pin)
#define IO_REG_TYPE unsigned int
#define IO_REG_ASM
#define DIRECT_READ(base, pin)          digitalRead(pin)
#define DIRECT_WRITE_LOW(base, pin)     digitalWrite(pin, LOW)
#define DIRECT_WRITE_HIGH(base, pin)    digitalWrite(pin, HIGH)
#define DIRECT_MODE_INPUT(base, pin)    pinMode(pin,INPUT)
#define DIRECT_MODE_OUTPUT(base, pin)   pinMode(pin,OUTPUT)

I would like to upload the libraries, but this forrum wont allow me.
Goodluck,
Erik

2

sensor DS18B20 is a digital sensor and can be connected to analog pin A7

3

Hi Leptirba,

Analog pins are digital pins with an extra analog to digital converter(ADC) in between.
You can use them as digital pins without any problems.

Goodluck,
Erik

4

Hi Erik,

Do you have a Github account? If not, I’d suggest to get one (it’s free).
You can then clone (fork) the OneWire library from Paul Stoffregen (https://github.com/PaulStoffregen/OneWire)
and add your modifications to it.
And then push to your Github

5

I do own an Github account, but it hates my laptop and refuses to sync or place folders in any way.
In short, dont have any way to upload anything to it.