adding methods to setup critical/upper and lower temperatures

[jposada202020]

Solves #27.

Trying to implement different functions according to issue 27. If this is already included after the board revision please feel free to close this PR. I could implement the other functions, just want to verify first.

Tested in

Adafruit CircuitPython 6.2.0-beta.3-188-g05ed179e1 on 2021-03-15; Adafruit Feather RP2040 with rp2040

This could be tested using the following script

import time
import board
import adafruit_mcp9808

i2c = board.I2C()  # uses board.SCL and board.SDA
mcp = adafruit_mcp9808.MCP9808(i2c)

print("setting values, and reading temperature in between to clear the buffer")
mcp.upper_temperature = 89
print(mcp.temperature)
time.sleep(1)
mcp.lower_temperature = 55
print(mcp.temperature)
time.sleep(1)
mcp.critical_temperature = 100
print(mcp.temperature)
time.sleep(1)

print("checking that values are stored")
print("Lower Temperature Limit:", mcp.lower_temperature)
print("Upper Temperature Limit:", mcp.upper_temperature)
print("Critical Temperature Limit:", mcp.critical_temperature)

[tannewt]

Thanks for adding these! One suggestion about the comments.

[jposada202020]

Will do, just wanted to know if still wanted, I need to correct all the docs, change the number type to const(0x03), defining those in Library_variable, approach a little more to the Library standars.
Thanks. will do those changes and add the two other methods.

[tannewt]

Two more things. Thanks!

[jposada202020]

@tannewt before you take a long journey in the BLE stuff could you verify this... :) thanks

[tannewt]

A couple more things. Thanks for improving this!

[jposada202020]

@tannewt changes were done as suggested. Thanks

[tannewt]

A couple more minor things. Thanks!

[tannewt]

Looks good to me! Thank you!