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Parallax P8X32A/Propeller, P2X8C4M64P/Propeller 2 driver object for the Sensirion SHT3x Temp/RH Sensor

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avsa242/sht3x-spin

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sht3x-spin


This is a P8X32A/Propeller, P2X8C4M64P/Propeller 2 driver object for the Sensirion SHT3x (30, 31, 35) combination temperature and relative humidity sensors.

IMPORTANT: This software is meant to be used with the spin-standard-library (P8X32A) or p2-spin-standard-library (P2X8C4M64P). Please install the applicable library first before attempting to use this code, otherwise you will be missing several files required to build the project.

Salient Features

  • I2C connection at ~30kHz (P1: bytecode-based I2C engine), up to 1MHz (P1: PASM-based I2C engine, P2: max tested speed 840kHz)
  • Measurement in one-shot (with clock-stretching) or continuous modes
  • Supports all three measurement repeatability modes and five data rates
  • On-chip heating element operation
  • Reading the sensor's serial number
  • Supports alternate slave address
  • Set interrupt thresholds
  • Optional reset pin

Requirements

P1/SPIN1:

  • spin-standard-library
  • 1 extra core/cog for the PASM I2C engine (none if the bytecode-based I2C engine is used)
  • sensor.temp_rh.common.spinh (source: spin-standard-library)

P2/SPIN2:

  • p2-spin-standard-library
  • sensor.temp_rh.common.spin2h (source: p2-spin-standard-library)

Compiler Compatibility

Processor Language Compiler Backend Status
P1 SPIN1 FlexSpin (6.9.4) Bytecode OK
P1 SPIN1 FlexSpin (6.9.4) Native/PASM OK
P2 SPIN2 FlexSpin (6.9.4) NuCode Untested
P2 SPIN2 FlexSpin (6.9.4) Native/PASM2 OK

(other versions or toolchains not listed are not supported, and may or may not work)

Limitations

  • TBD