MicroPython PCT2075 Library

pct2075

  • Author(s): Jose D. Montoya

pct2075

MciroPython Driver for the NXP Semiconductors Temperature Sensor

  • Author(s): Bryan Siepert,Jose D. Montoya

class micropython_pct2075.pct2075.PCT2075(i2c, address: int = 0x37)[source]

Driver for the PCT2075 Sensor connected over I2C.

Parameters:
i2c : I2C

The I2C bus the PCT2075 is connected to.

address : int

The I2C device address. Defaults to 0x69

Raises:

RuntimeError – if the sensor is not found

Quickstart: Importing and using the device

Here is an example of using the PCT2075 class. First you will need to import the libraries to use the sensor

from machine import Pin, I2C
from micropython_pct2075 import pct2075

Once this is done you can define your machine.I2C object and define your sensor object

i2c = I2C(1, sda=Pin(2), scl=Pin(3))
pct2075 = pct2075.PCT2075(i2c)

Now you have access to the attributes
property delay_between_measurements : int

The amount of time between measurements made by the sensor in milliseconds. The value must be between 100 and 3100 and a multiple of 100

high_temp_active_high

Sets the alert polarity. When False the INT pin will be tied to ground when an alert is triggered. If set to True it will be disconnected from ground when an alert is triggered.

property high_temperature_threshold : float

The temperature in degrees celsius that will trigger an alert on the INT pin if it is exceeded. Resolution is 0.5 Celsius

property operation_mode : str

Sensor operation_mode Sets the alert mode. In comparator mode, the sensor acts like a thermostat and will activate the INT pin according to high_temp_active_high when an alert is triggered. The INT pin will be deactivated when the temperature falls below temperature_hysteresis. In interrupt mode the INT pin is activated once when a temperature fault is detected, and once more when the temperature falls below temperature_hysteresis. In interrupt mode, the alert is cleared by reading a property

Mode

Value

pct2075.COMPARATOR

0b0

pct2075.INTERRUPT

0b1
property temperature : float

Returns the current temperature in degrees Celsius. Resolution is 0.125 Celsius

property temperature_hysteresis : float

The temperature hysteresis value defines the bottom of the temperature range in degrees Celsius in which the temperature is still considered high. temperature_hysteresis must be lower than high_temperature_threshold. Resolution is 0.5 degrees Celsius