apps/arduino/WaterPump.scxml


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<scxml datamodel="native" initial="dark" version="1.0">
  <!-- we provide the datamodel inline in the scaffolding -->
  <script><![CDATA[
    pinMode(LED, OUTPUT);
    for (char i = 0; i < 4; ++i) {
      pinMode(pump[i], OUTPUT);
      digitalWrite(pump[i], PUMP_OFF);
      bed[i].set_CS_AutocaL_Millis(0xFFFFFFFF);
    }
  ]]></script>

  <!-- it is too dark to water flowers -->
  <state id="dark">
    <transition event="light" cond="_event->data.light > LIGHT_THRES" target="light" />
    <onentry>
      <script><![CDATA[
        for (char i = 0; i < 4; ++i) {
          digitalWrite(pump[i], PUMP_OFF);
        }
      ]]></script>
    </onentry>
  </state>

  <!-- start to take measurements and activate single pumps if too dry -->
  <state id="light">
    <transition event="light" cond="_event->data.light &lt; LIGHT_THRES" target="dark" />

    <!-- delivers events for all the capsense measurements -->
    <invoke type="capsense" id="cap" />

    <state id="idle">
      <transition event="pump" cond="soil[0] &lt; 0 &amp;&amp;
                                     soil[0] &lt;= soil[1] &amp;&amp;
                                     soil[0] &lt;= soil[2] &amp;&amp;
                                     soil[0] &lt;= soil[3]" target="pump1" />
      <transition event="pump" cond="soil[1] &lt; 0 &amp;&amp;
                                     soil[1] &lt;= soil[0] &amp;&amp;
                                     soil[1] &lt;= soil[2] &amp;&amp;
                                     soil[1] &lt;= soil[3]" target="pump2" />
      <transition event="pump" cond="soil[2] &lt; 0 &amp;&amp;
                                     soil[2] &lt;= soil[0] &amp;&amp;
                                     soil[2] &lt;= soil[1] &amp;&amp;
                                     soil[2] &lt;= soil[3]" target="pump3" />
      <transition event="pump" cond="soil[3] &lt; 0 &amp;&amp;
                                     soil[3] &lt;= soil[0] &amp;&amp;
                                     soil[3] &lt;= soil[1] &amp;&amp;
                                     soil[3] &lt;= soil[2]" target="pump4" />
    </state>
    
    <state id="pumping">
      <transition event="idle" target="idle" />
      <onentry>
        <send delay="8000ms" event="idle" />
      </onentry>

      <state id="pump1">
        <invoke type="pump" id="1" />
      </state>
      <state id="pump2">
        <invoke type="pump" id="2" />
      </state>
      <state id="pump3">
        <invoke type="pump" id="3" />
      </state>
      <state id="pump4">
        <invoke type="pump" id="4" />
      </state>
    </state>
  </state>
</scxml>