FMC Host doesn't know if lock is lost when Bno055 is enabled but PolledBno055Data node is absent from workflow

[cjsha]

Without the PolledBno055Data node in this workflow, the FMC Host awaits Bno055 data and never figures out if lock is lost. This might also cause the following error message to show "a failure to write to stream or register" when trying to restart the workflow.

@jonnew mentioned adding a watchdog as a potential solution.

lock goes undetected example

<?xml version="1.0" encoding="utf-8"?>
<WorkflowBuilder Version="2.8.5"
                 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                 xmlns:onix1="clr-namespace:OpenEphys.Onix1;assembly=OpenEphys.Onix1"
                 xmlns="https://bonsai-rx.org/2018/workflow">
  <Workflow>
    <Nodes>
      <Expression xsi:type="Combinator">
        <Combinator xsi:type="onix1:CreateContext">
          <onix1:Driver>riffa</onix1:Driver>
          <onix1:Index>0</onix1:Index>
        </Combinator>
      </Expression>
      <Expression xsi:type="Combinator">
        <Combinator xsi:type="onix1:ConfigureUclaMiniscopeV4">
          <onix1:Name>UclaMiniscopeV4</onix1:Name>
          <onix1:Camera>
            <onix1:DeviceName>UclaMiniscopeV4/UclaMiniscopeV4</onix1:DeviceName>
            <onix1:DeviceAddress>256</onix1:DeviceAddress>
            <onix1:Enable>true</onix1:Enable>
            <onix1:FrameRate>Fps30Hz</onix1:FrameRate>
            <onix1:SensorGain>Low</onix1:SensorGain>
            <onix1:InterleaveLed>false</onix1:InterleaveLed>
            <onix1:LedBrightness>0</onix1:LedBrightness>
            <onix1:LiquidLensVoltage>47</onix1:LiquidLensVoltage>
          </onix1:Camera>
          <onix1:Bno055>
            <onix1:DeviceName>UclaMiniscopeV4/PolledBno055</onix1:DeviceName>
            <onix1:DeviceAddress>257</onix1:DeviceAddress>
            <onix1:Enable>true</onix1:Enable>
            <onix1:AxisMap>ZYX</onix1:AxisMap>
            <onix1:AxisSign>MirrorZ MirrorY MirrorX</onix1:AxisSign>
          </onix1:Bno055>
          <onix1:Port>PortA</onix1:Port>
          <onix1:PortVoltage xsi:nil="true" />
        </Combinator>
      </Expression>
      <Expression xsi:type="Combinator">
        <Combinator xsi:type="onix1:StartAcquisition">
          <onix1:ReadSize>2048</onix1:ReadSize>
          <onix1:WriteSize>2048</onix1:WriteSize>
        </Combinator>
      </Expression>
      <Expression xsi:type="Combinator">
        <Combinator xsi:type="onix1:UclaMiniscopeV4CameraData">
          <onix1:DeviceName>UclaMiniscopeV4/UclaMiniscopeV4</onix1:DeviceName>
          <onix1:DataType>U8</onix1:DataType>
        </Combinator>
      </Expression>
      <Expression xsi:type="MemberSelector">
        <Selector>Image</Selector>
      </Expression>
    </Nodes>
    <Edges>
      <Edge From="0" To="1" Label="Source1" />
      <Edge From="1" To="2" Label="Source1" />
      <Edge From="3" To="4" Label="Source1" />
    </Edges>
  </Workflow>
</WorkflowBuilder>