diff --git a/src/component/ComponentForm.tsx b/src/component/ComponentForm.tsx
index 17c1bf7..dbebbb5 100644
--- a/src/component/ComponentForm.tsx
+++ b/src/component/ComponentForm.tsx
@@ -19,9 +19,10 @@ import {
   Tooltip,
   Typography
 } from "@mui/material";
-import { 
+import {
   ExpandMore,
-  Close as CloseIcon
+  Close as CloseIcon,
+  Remove as RemoveIcon
 } from "@mui/icons-material";
 import PeriodSelect from "common/time/PeriodSelect";
 import SearchSelect, { Option } from "common/SearchSelect";
@@ -97,6 +98,7 @@ interface Props {
   component: Component;
   componentChanged: (component: Component, formValid: boolean) => void;
   canEdit: boolean;
+  hideControllerFields?: boolean;
 }
 
 interface ComponentData {
@@ -119,7 +121,7 @@ export default function ComponentForm(props: Props) {
   const classes = useStyles();
   const grainOptions = GrainOptions();
   const [{ user }] = useGlobalState();
-  const { device, component, componentChanged, canEdit } = props;
+  const { device, component, componentChanged, canEdit, hideControllerFields } = props;
   const [reportExpanded, setReportExpanded] = useState(false);
   const [dataUsageWarningDismissed, setDataUsageWarningDismissed] = useState(true);
   const [form, setForm] = useState<ComponentData>({
@@ -137,7 +139,8 @@ export default function ComponentForm(props: Props) {
     sensorDistance: "0",
   });
   const [compMode, setCompMode] = useState<any>();
-  const [useCustomGrain, setUseCustomGrain] = useState<boolean>(false)
+  const [useCustomGrain, setUseCustomGrain] = useState<boolean>(false);
+  const [controlEmail, setControlEmail] = useState("");
   //const [numCalibrations, setNumCalibrations] = useState(0)
 
   useEffect(() => {
@@ -356,6 +359,21 @@ export default function ComponentForm(props: Props) {
     setForm(f);
   };
 
+  const addControlEmail = () => {
+    const trimmed = controlEmail.trim().toLowerCase();
+    if (trimmed === "" || form.component.settings.controlEmails.includes(trimmed)) return;
+    let f = cloneDeep(form);
+    f.component.settings.controlEmails.push(trimmed);
+    setForm(f);
+    setControlEmail("");
+  };
+
+  const removeControlEmail = (index: number) => {
+    let f = cloneDeep(form);
+    f.component.settings.controlEmails.splice(index, 1);
+    setForm(f);
+  };
+
   const toggleMeasure = (event: any) => {
     let f = cloneDeep(form);
     f.measure = event.target.checked;
@@ -1341,7 +1359,7 @@ export default function ComponentForm(props: Props) {
               }}
             />
           )}
-          {isController(component.settings.type) && (
+          {isController(component.settings.type) && !hideControllerFields && (
             <React.Fragment>
               <Grid size={{ xs: 12 }}>
                 <TextField
@@ -1382,6 +1400,62 @@ export default function ComponentForm(props: Props) {
                   />
                 </FormControl>
               </Grid>
+              <Grid size={{ xs: 12 }}>
+                <Typography variant="subtitle2" style={{ marginTop: 16, marginBottom: 8 }}>
+                  Authorized Control Emails
+                </Typography>
+                <Grid container spacing={1} alignItems="center">
+                  <Grid size={{ xs: 9 }}>
+                    <TextField
+                      label="Email address"
+                      type="email"
+                      fullWidth
+                      variant="outlined"
+                      size="small"
+                      value={controlEmail}
+                      onChange={e => setControlEmail(e.target.value)}
+                      onKeyDown={e => {
+                        if (e.key === "Enter") {
+                          e.preventDefault();
+                          addControlEmail();
+                        }
+                      }}
+                      disabled={!canEdit}
+                    />
+                  </Grid>
+                  <Grid size={{ xs: 3 }}>
+                    <Button
+                      fullWidth
+                      variant="outlined"
+                      color="primary"
+                      onClick={addControlEmail}
+                      disabled={!canEdit || controlEmail.trim() === ""}>
+                      Add
+                    </Button>
+                  </Grid>
+                </Grid>
+                {component.settings.controlEmails.map((email, i) => (
+                  <Grid
+                    container
+                    key={i}
+                    alignItems="center"
+                    justifyContent="space-between"
+                    style={{ marginTop: 4 }}>
+                    <Grid>
+                      <Typography variant="body2">{email}</Typography>
+                    </Grid>
+                    <Grid>
+                      <IconButton
+                        size="small"
+                        onClick={() => removeControlEmail(i)}
+                        disabled={!canEdit}
+                        className={classes.redButton}>
+                        <RemoveIcon />
+                      </IconButton>
+                    </Grid>
+                  </Grid>
+                ))}
+              </Grid>
             </React.Fragment>
           )}
           {showDataUsageWarning && (
diff --git a/src/component/ComponentSettings.tsx b/src/component/ComponentSettings.tsx
index db0e5ad..e9a7983 100644
--- a/src/component/ComponentSettings.tsx
+++ b/src/component/ComponentSettings.tsx
@@ -8,6 +8,7 @@ import {
   DialogContentText,
   DialogTitle,
   Divider,
+  FormControl,
   FormControlLabel,
   Grid2 as Grid,
   IconButton,
@@ -41,8 +42,10 @@ import {
   GetComponentTypeOptions,
   getFriendlyName,
   getMeasurements,
-  isController
+  isController,
 } from "pbHelpers/ComponentType";
+import PeriodSelect from "common/time/PeriodSelect";
+import { bestUnit, milliToX } from "common/time/duration";
 import {
   ComponentAvailabilityMap,
   DeviceAvailabilityMap,
@@ -177,6 +180,7 @@ export default function ComponentSettings(props: Props) {
   const [formValid, setFormValid] = useState(false);
   const [excludedNodes, setExcludedNodes] = useState<number[]>([]);
   const [nodeToExclude, setNodeToExclude] = useState(0);
+  const [controlEmail, setControlEmail] = useState("");
 
   const handleChange = (event: React.ChangeEvent<{}>, newValue: number) => {
     setTabVal(newValue);
@@ -498,6 +502,7 @@ export default function ComponentSettings(props: Props) {
           component={formComponent}
           device={device}
           canEdit={canEdit}
+          hideControllerFields={isController(formComponent.settings.type)}
           componentChanged={(formComp, isValid) => {
             formComponent.settings = formComp.settings;
             setFormValid(isValid);
@@ -867,6 +872,167 @@ export default function ComponentSettings(props: Props) {
     );
   };
 
+  const addControlEmail = () => {
+    const trimmed = controlEmail.trim().toLowerCase();
+    if (trimmed === "" || formComponent.settings.controlEmails.includes(trimmed)) return;
+    let f = cloneDeep(formComponent);
+    f.settings.controlEmails.push(trimmed);
+    setFormComponent(f);
+    setControlEmail("");
+  };
+
+  const removeControlEmail = (index: number) => {
+    let f = cloneDeep(formComponent);
+    f.settings.controlEmails.splice(index, 1);
+    setFormComponent(f);
+  };
+
+  const handleOutputModeChanged = (event: any) => {
+    let f = cloneDeep(formComponent);
+    f.settings.defaultOutputState = event.target.value;
+    setFormComponent(f);
+  };
+
+  const handleMinCycleTimeChanged = (ms: number) => {
+    let f = cloneDeep(formComponent);
+    f.settings.minCycleTimeMs = Number(ms);
+    setFormComponent(f);
+  };
+
+  const isMinCycleTimeValid = () => {
+    const ext = extension(formComponent.settings.type, formComponent.settings.subtype);
+    if (!ext.isController) return true;
+    let min = Math.max(0, ext.minCycleTimeMs ? ext.minCycleTimeMs : 0);
+    return formComponent.settings.minCycleTimeMs >= min;
+  };
+
+  const minCycleTimeDescription = () => {
+    const ext = extension(formComponent.settings.type, formComponent.settings.subtype);
+    if (!ext.isController) return "";
+    const min = Math.max(0, ext.minCycleTimeMs ? ext.minCycleTimeMs : 0);
+    const unit = bestUnit(min);
+    const value = milliToX(min, unit).toString();
+    return "Must be at least " + value + " " + unit;
+  };
+
+  const controlContent = () => {
+    return (
+      <DialogContent>
+        <TextField
+          id="output-mode"
+          name="outputMode"
+          select
+          label="Output Mode"
+          value={formComponent.settings.defaultOutputState}
+          onChange={handleOutputModeChanged}
+          margin="normal"
+          fullWidth
+          variant="outlined"
+          disabled={!canEdit}>
+          <MenuItem value={0}>Auto</MenuItem>
+          <MenuItem value={1}>On</MenuItem>
+          <MenuItem value={2}>Off</MenuItem>
+        </TextField>
+        <FormControl fullWidth>
+          <PeriodSelect
+            id="minCycleTimeMs"
+            label="Minimum cycle time"
+            units={["seconds", "minutes"]}
+            isDisabled={!canEdit}
+            isError={!isMinCycleTimeValid()}
+            initialMs={
+              formComponent.settings.minCycleTimeMs
+                ? formComponent.settings.minCycleTimeMs
+                : undefined
+            }
+            onChange={handleMinCycleTimeChanged}
+            helperText={
+              isMinCycleTimeValid()
+                ? "The minimum amount of time that the component spends in a state"
+                : minCycleTimeDescription()
+            }
+          />
+        </FormControl>
+        <Typography variant="subtitle2" sx={{ marginTop: 2, marginBottom: 1 }}>
+          Authorized Control Emails
+        </Typography>
+        <Grid container spacing={1} alignItems="center">
+          <Grid size={{ xs: 9 }}>
+            <TextField
+              label="Email address"
+              type="email"
+              fullWidth
+              variant="outlined"
+              size="small"
+              value={controlEmail}
+              onChange={e => setControlEmail(e.target.value)}
+              onKeyDown={e => {
+                if (e.key === "Enter") {
+                  e.preventDefault();
+                  addControlEmail();
+                }
+              }}
+              disabled={!canEdit}
+            />
+          </Grid>
+          <Grid size={{ xs: 3 }}>
+            <Button
+              fullWidth
+              variant="outlined"
+              color="primary"
+              onClick={addControlEmail}
+              disabled={!canEdit || controlEmail.trim() === ""}>
+              Add
+            </Button>
+          </Grid>
+        </Grid>
+        {formComponent.settings.controlEmails.map((email, i) => (
+          <Grid
+            container
+            key={i}
+            alignItems="center"
+            justifyContent="space-between"
+            style={{ marginTop: 4 }}>
+            <Grid>
+              <Typography variant="body2">{email}</Typography>
+            </Grid>
+            <Grid>
+              <IconButton
+                size="small"
+                onClick={() => removeControlEmail(i)}
+                disabled={!canEdit}
+                className={classNames(classes.redButton)}>
+                <RemoveIcon />
+              </IconButton>
+            </Grid>
+          </Grid>
+        ))}
+        <Divider sx={{ marginTop: 3, marginBottom: 2 }} />
+        <Typography variant="subtitle2" gutterBottom>
+          Email Control
+        </Typography>
+        <Typography variant="body2" color="textSecondary" gutterBottom>
+          Authorized emails can control this component by sending an email to the
+          control address. Contact your administrator for the control email
+          address. Use one of the following as the email subject:
+        </Typography>
+        <Box
+          sx={{
+            backgroundColor: "action.hover",
+            borderRadius: 1,
+            padding: 1.5,
+            marginTop: 1,
+            fontFamily: "monospace",
+            fontSize: "0.85rem"
+          }}>
+          <div>{device.id()}:{formComponent.settings.type}-{formComponent.settings.addressType}-{formComponent.settings.address} - ON</div>
+          <div>{device.id()}:{formComponent.settings.type}-{formComponent.settings.addressType}-{formComponent.settings.address} - OFF</div>
+          <div>{device.id()}:{formComponent.settings.type}-{formComponent.settings.addressType}-{formComponent.settings.address} - AUTO</div>
+        </Box>
+      </DialogContent>
+    );
+  };
+
   const actions = () => {
     return (
       <DialogActions>
@@ -1042,36 +1208,55 @@ export default function ComponentSettings(props: Props) {
               scroll="paper">
               {title()}
               <Divider />
-              {!isController(formComponent.settings.type) && (
-                <Tabs
-                  value={tabVal}
-                  indicatorColor="primary"
-                  textColor="primary"
-                  onChange={handleChange}>
-                  <Tab label="General" />
-                  <Tab label="Overlays" />
-                  <Tab label="Nodes" disabled={!prevComponent} />
-                </Tabs>
+              {isController(formComponent.settings.type) ? (
+                <React.Fragment>
+                  <Tabs
+                    value={tabVal}
+                    indicatorColor="primary"
+                    textColor="primary"
+                    onChange={handleChange}>
+                    <Tab label="General" />
+                    <Tab label="Control" />
+                  </Tabs>
+                  <TabPanelMine value={tabVal} index={0}>
+                    {content()}
+                  </TabPanelMine>
+                  <TabPanelMine value={tabVal} index={1}>
+                    {controlContent()}
+                  </TabPanelMine>
+                </React.Fragment>
+              ) : (
+                <React.Fragment>
+                  <Tabs
+                    value={tabVal}
+                    indicatorColor="primary"
+                    textColor="primary"
+                    onChange={handleChange}>
+                    <Tab label="General" />
+                    <Tab label="Overlays" />
+                    <Tab label="Nodes" disabled={!prevComponent} />
+                  </Tabs>
+                  <TabPanelMine value={tabVal} index={0}>
+                    {content()}
+                  </TabPanelMine>
+                  <TabPanelMine value={tabVal} index={1}>
+                    <DialogContent>
+                      <Grid
+                        container
+                        direction="row"
+                        justifyContent="space-between"
+                        alignItems="center"
+                        alignContent="center"
+                        spacing={1}>
+                        {overlayGroup()}
+                      </Grid>
+                    </DialogContent>
+                  </TabPanelMine>
+                  <TabPanelMine value={tabVal} index={2}>
+                    {componentPrefs()}
+                  </TabPanelMine>
+                </React.Fragment>
               )}
-              <TabPanelMine value={tabVal} index={0}>
-                {content()}
-              </TabPanelMine>
-              <TabPanelMine value={tabVal} index={1}>
-                <DialogContent>
-                  <Grid
-                    container
-                    direction="row"
-                    justifyContent="space-between"
-                    alignItems="center"
-                    alignContent="center"
-                    spacing={1}>
-                    {overlayGroup()}
-                  </Grid>
-                </DialogContent>
-              </TabPanelMine>
-              <TabPanelMine value={tabVal} index={2}>
-                {componentPrefs()}
-              </TabPanelMine>
               {actions()}
             </ResponsiveDialog>
           )}
diff --git a/src/device/VersionChip.tsx b/src/device/VersionChip.tsx
index 09dac0f..8826239 100644
--- a/src/device/VersionChip.tsx
+++ b/src/device/VersionChip.tsx
@@ -22,6 +22,14 @@ class VersionChip extends React.Component<Props, State> {
           variant="outlined"
           label={firmwareVersionHelper.description}
           icon={firmwareVersionHelper.icon}
+          sx={
+            firmwareVersionHelper.colour
+              ? {
+                  borderColor: firmwareVersionHelper.colour,
+                  color: firmwareVersionHelper.colour
+                }
+              : undefined
+          }
         />
       </Tooltip>
     );
diff --git a/src/pbHelpers/FirmwareVersion.tsx b/src/pbHelpers/FirmwareVersion.tsx
index d7dcc8c..49472be 100644
--- a/src/pbHelpers/FirmwareVersion.tsx
+++ b/src/pbHelpers/FirmwareVersion.tsx
@@ -9,6 +9,7 @@ export interface FirmwareVersionHelper {
 
 const oldFirmwareColour = "var(--status-warning)";
 const currentFirmwareColour = "var(--status-ok)";
+const unknownFirmwareColour = "var(--status-warning)";
 
 export function getFirmwareVersionHelper(
   version: string,
@@ -17,24 +18,35 @@ export function getFirmwareVersionHelper(
   const firmwareIcon = <FirmwareIcon />;
   const oldFirmwareIcon = <FirmwareIcon style={{ color: oldFirmwareColour }} />;
   const currentFirmwareIcon = <FirmwareIcon style={{ color: currentFirmwareColour }} />;
+  const unknownFirmwareIcon = <FirmwareIcon style={{ color: unknownFirmwareColour }} />;
   let helper = {} as FirmwareVersionHelper;
   if (!version || version === "") {
     helper.description = "Unknown version";
     helper.icon = oldFirmwareIcon;
     helper.tooltip = "We don't know what version your device is, it may behave unexpectedly";
+    helper.colour = oldFirmwareColour;
+  } else if (version.startsWith("!")) {
+    const cleanVersion = version.substring(1);
+    helper.description = cleanVersion;
+    helper.icon = unknownFirmwareIcon;
+    helper.tooltip = "Firmware " + cleanVersion + " was reported by the device but is missing from the firmware list";
+    helper.colour = unknownFirmwareColour;
   } else if (available !== "" && version !== available) {
     helper.description = version;
     helper.icon = oldFirmwareIcon;
     helper.tooltip =
       "A firmware upgrade is available, some features may be disabled for out-of-date devices";
+    helper.colour = oldFirmwareColour;
   } else if (available === "") {
     helper.description = version;
     helper.icon = firmwareIcon;
     helper.tooltip = "Running version " + version;
+    helper.colour = "";
   } else {
     helper.description = version;
     helper.icon = currentFirmwareIcon;
     helper.tooltip = "Your device is running the latest firmware";
+    helper.colour = currentFirmwareColour;
   }
   return helper;
 }