SHTxx humidity sensor

Module XML file: humid_sht.xml

This reads the values for humidity and temperature from the SHTxx sensor through bit banging.

Example for airframe file

This example contains all possible configuration options, not all of them are mandatory!

<modules>
  <load name="humid_sht.xml">
    <define name="SHT_DAT_GPIO" value="port,pin" />
    <define name="SHT_SCK_GPIO" value="port,pin" />
  </load>
</modules>

Module configuration options

Define Options

• name: SHT_DAT_GPIO value: port,pin
  Description: data GPIO (e.g.: GPIOA,GPIO8)
• name: SHT_SCK_GPIO value: port,pin
  Description: clock GPIO (e.g.: GPIOA,GPIO9)

Module functions

Init Functions

These initialization functions are called once on startup.

• humid_sht_init()

Periodic Functions

These functions are called periodically at the specified frequency from the module periodic loop.

• humid_sht_periodic()
  • Frequency in Hz: 4.
  • Autorun: LOCK
    Periodic function automatically starts after init and can't be stopped.

Files

Header Files

The following headers are automatically included in modules.h

• humid_sht.h

Source Files

• modules/meteo/humid_sht.c

Raw humid_sht.xml file:

<!DOCTYPE module SYSTEM "module.dtd">

<module name="humid_sht" dir="meteo">
  <doc>
    <description>
      SHTxx humidity sensor.
      This reads the values for humidity and temperature from the SHTxx sensor through bit banging.
    </description>
    <define name="SHT_DAT_GPIO" value="port,pin" description="data GPIO (e.g.: GPIOA,GPIO8)"/>
    <define name="SHT_SCK_GPIO" value="port,pin" description="clock GPIO (e.g.: GPIOA,GPIO9)"/>
  </doc>
  <header>
    <file name="humid_sht.h"/>
  </header>
  <init fun="humid_sht_init()"/>
  <periodic fun="humid_sht_periodic()" freq="4."/>
  <makefile target="ap">
    <file name="humid_sht.c"/>
  </makefile>
</module>