micropython-mcp9808

This repository contains a MicroPython "driver" implementation for the MCP9808 temperature sensor from Microchip.

Currently only a reasonably small subset of the features the sensor is implemented.

Implemented

Reading the temperature value in degree celsius. The read() method supports floating point values and the read_int() method does not use floating point arythmetic at all and does return a tuple of decimal and fraction parts of the temperature reading.
Shutdown mode to save power. When not in shutdown mode the sensor does draw 200-400 uA. Data acquisition can only be stopped in the so called "shutdown mode". In this mode communication is still possible using I2C.
Changing the data acquisition resolution and duration. On power up the sensor is set to maximum resolution.

Mode Name Resolution Duration Samples / sec

T_RES_MIN +-0.5 °C 30 ms 33

T_RES_LOW +-0.25 °C 65 ms 15

T_RES_AVG +-0.125 °C 130 ms 7

T_RES_MAX +-0.0625 °C 250 ms 4

Mode Name	Resolution	Duration	Samples / sec
T_RES_MIN	+-0.5 °C	30 ms	33
T_RES_LOW	+-0.25 °C	65 ms	15
T_RES_AVG	+-0.125 °C	130 ms	7
T_RES_MAX	+-0.0625 °C	250 ms	4