dstemp=github:bsiever/microbit-dstemp
This extension allows the micro:bit to use the Dallas Semiconductor DS18B20 temperature sensor.
This module supports use of one or more DS18B20 temperature sensors. Each sensor must be connected to a separate pin and must include a 4.7k Ohm pull-up resistor between 3V and the signal.
Common wiring is:
P0, to the data in/out (white wire) of the sensordstemp.celsius(pin: DigitalPin) : number
Get the current temperature in Celsius. Returns -Infinity on error.
dstemp.sensorError(errCallback: (errorMessage: string, errorCode: number, port: number) => void) {
Report on any errors
||errorMessage|| will be a string describing the error||errorCode|| will be a numeric code||port|| will indicate which specific port encountered the error (if multiple sensors are connected)It’s best to capture the temperature in a variable and only use it if the value isn’t -Infinity. Since -300 C is below absolute zero, ensuring the temperature is over -300 is sufficient. For example:
temp = dstemp.celsius(DigitalPin.P0)
if (temp > -300) {
basic.showString("" + (temp))
}