si70xx-spin

---

This is a P8X32A/Propeller, P2X8C4M64P/Propeller 2 driver object for Silicon Labs Si70xx series temperature/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 up to 400kHz
• Temperature in hundredths of a degree (scale can be set to Fahrenheit or Celsius)
• Relative humidity in hundredths of a percent
• On-chip heater control: enable/disable, set drive strength/current level
• Set sensor resolution, in bits
• Read chip-specific info: device ID/part number, firmware rev, 64-bit serial number

Requirements

P1/SPIN1:

• spin-standard-library
• 1 extra core/cog for the PASM I2C engine (none if 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 (5.9.14-beta)	Bytecode	OK
P1	SPIN1	FlexSpin (5.9.14-beta)	Native code	OK
P1	SPIN1	OpenSpin (1.00.81)	Bytecode	Untested (deprecated)
P2	SPIN2	FlexSpin (5.9.14-beta)	NuCode	FTBFS
P2	SPIN2	FlexSpin (5.9.14-beta)	Native code	OK
P1	SPIN1	Brad's Spin Tool (any)	Bytecode	Unsupported
P1, P2	SPIN1, 2	Propeller Tool (any)	Bytecode	Unsupported
P1, P2	SPIN1, 2	PNut (any)	Bytecode	Unsupported

Limitations

• TBD