diff --git a/main.py b/main.py
index 8544e70..948171d 100644
--- a/main.py
+++ b/main.py
@@ -26,8 +26,8 @@ DATA_SAVE_PATH = DATA_SAVE_FOLDER + DATA_SAVE_FILE
 DEFAULT_DATA = {
     "version": 0,
     "enable": False,
-    "interpolate": False,
-    "curve": [],
+    "interpolate": True,
+    "curve": [], # items are {x: int (distance from left), y: int (distance from top, NOT bottom)}
 }
 
 class Plugin:
@@ -81,11 +81,26 @@ class Plugin:
         await self.wait_for_ready(self)
         return self.settings["enable"]
 
+    async def set_interpol(self, interpolate: bool):
+        await self.wait_for_ready(self)
+        self.settings["interpolate"] = interpolate
+        self.is_changed = True
+
+    async def get_interpol(self) -> bool:
+        await self.wait_for_ready(self)
+        return self.settings["interpolate"]
+
     async def set_plot_size(self, x, y):
         logging.debug(f"Set plot size to ({x},{y})")
         self.plot_width = x
         self.plot_height = y
 
+    async def get_fan_rpm(self) -> int:
+        return get_fan_input()
+
+    async def get_temperature(self) -> int:
+        return int(thermal_zone(0))
+
     async def set_poll_period(self, period):
         self.period_s = period
 
@@ -100,21 +115,49 @@ class Plugin:
             await asyncio.sleep(0.01)
 
     def do_fan_control(self):
-        index = -1
         curve = self.settings["curve"]
-        temperature = (thermal_zone(0) - TEMPERATURE_MINIMUM) / TEMPERATURE_MAXIMUM
-        for i in range(len(curve)-1, -1, -1):
-            if curve[i]["x"] < temperature:
-                index = i
-                break
+        fan_ratio = 0 # unnecessary in Python, but stupid without
+        if len(curve) == 0:
+            fan_ratio = 1
+        else:
+            index = -1
+            temperature_ratio = (thermal_zone(0) - TEMPERATURE_MINIMUM) / (TEMPERATURE_MAXIMUM - TEMPERATURE_MINIMUM)
+            for i in range(len(curve)-1, -1, -1):
+                if curve[i]["x"] < temperature_ratio:
+                    index = i
+                    break
+            if self.settings["interpolate"]:
+                fan_ratio = self.interpolate_fan(self, index, temperature_ratio)
+            else:
+                fan_ratio = self.step_fan(self, index, temperature_ratio)
+        set_fan_target(int((fan_ratio * FAN_MAXIMUM) + FAN_MINIMUM))
+
+
+    def interpolate_fan(self, index, temperature_ratio):
+        curve = self.settings["curve"]
+        upper_point = {"x": 1.0, "y": 0.0}
+        lower_point = {"x": 0.0, "y": 1.0}
+        if index != -1: # guaranteed to not be empty
+            lower_point = curve[index]
+        if index != len(curve) - 1:
+            upper_point = curve[index+1]
+        #logging.debug(f"lower_point: {lower_point}, upper_point: {upper_point}")
+        upper_y = 1-upper_point["y"]
+        lower_y = 1-lower_point["y"]
+        slope_m = (upper_y - lower_y) / (upper_point["x"] - lower_point["x"])
+        y_intercept_b = lower_y - (slope_m * lower_point["x"])
+        logging.debug(f"interpolation: y = {slope_m}x + {y_intercept_b}")
+        return (slope_m * temperature_ratio) + y_intercept_b
+
+    def step_fan(self, index, temperature_ratio):
+        curve = self.settings["curve"]
         if index != -1:
-            target_speed = ((1 - curve[index]["y"]) * FAN_MAXIMUM) + FAN_MINIMUM
-            set_fan_target(int(target_speed))
+            return 1 - curve[index]["y"]
         else:
             if len(curve) == 0:
-                set_fan_target(int(FAN_MAXIMUM))
+                return 1
             else:
-                set_fan_target(int((FAN_MINIMUM + FAN_MAXIMUM) / 2))
+                return 0.5
 
     # Asyncio-compatible long-running code, executed in a task when the plugin is loaded
     async def _main(self):
@@ -146,7 +189,7 @@ class Plugin:
                 self.do_fan_control(self)
             await asyncio.sleep(self.period_s)
 
-def thermal_zone(index: int):
+def thermal_zone(index: int) -> float:
     with open(f"/sys/class/thermal/thermal_zone{index}/temp", "r") as f:
         result = float(f.read().strip()) / 1000.0
         logging.debug(f"Got {result}'C from thermal_zone{index}")
@@ -157,10 +200,16 @@ def set_fan_target(rpm: int):
     with open("/sys/class/hwmon/hwmon5/fan1_target", "w") as f:
         f.write(str(rpm))
 
+def get_fan_input() -> int:
+    with open("/sys/class/hwmon/hwmon5/fan1_input", "r") as f:
+        rpm = int(f.read().strip())
+        #logging.debug(f"Got {rpm} from fan1_input") # this is too spammy; runs every 0.5s
+        return rpm
+
 def on_enable():
     with open("/sys/class/hwmon/hwmon5/recalculate", "w") as f:
         f.write("1")
-    # TODO disable system fan control
+    # TODO stop system fan control
 
 def on_disable():
     with open("/sys/class/hwmon/hwmon5/recalculate", "w") as f:
diff --git a/main_view.html b/main_view.html
index b7e4865..33c4110 100644
--- a/main_view.html
+++ b/main_view.html
@@ -6,7 +6,7 @@
         <script src="/static/library.js"></script>
         <script>
             const PLOT_HEIGHT = 200;
-            const PLOT_WIDTH = 284;
+            const PLOT_WIDTH = 270;
             const OFFSET_X = 0;
             const OFFSET_Y = 0;
             // state
@@ -47,6 +47,22 @@
                 return call_plugin_method("get_enable", {});
             }
 
+            function setInterpol(enable) {
+                return call_plugin_method("set_interpol", {"interpolate": enable});
+            }
+
+            function getInterpol() {
+                return call_plugin_method("get_interpol", {});
+            }
+
+            function getFanRpm() {
+                return call_plugin_method("get_fan_rpm", {});
+            }
+
+            function getTemperature() {
+                return call_plugin_method("get_temperature", {});
+            }
+
             function setPlotSize(x, y) {
                 return call_plugin_method("set_plot_size", {"x": x, "y": y});
             }
@@ -54,15 +70,19 @@
             // events
 
             async function onload_body() {
+                let hiderDiv = document.getElementById("hiderDiv");
                 let graphDiv = document.getElementById("graphDiv");
                 await setPlotSize(PLOT_WIDTH, PLOT_HEIGHT);
                 const state_controlToggle = await getEnable(); // retrieve from back-end
                 setToggleState(document.getElementById("controlToggle"), state_controlToggle);
-                showHideElement(graphDiv, state_controlToggle);
+                const state_interpolToggle = await getInterpol(); // retrieve from back-end
+                setToggleState(document.getElementById("interpolToggle"), state_interpolToggle);
+                showHideElement(hiderDiv, state_controlToggle);
                 if (state_controlToggle) {
                     curve = await getCurve();
                     buildCurvePlot(curve);
                 }
+                window.setInterval(pollStats, 500);
                 console.log("Loaded");
             }
 
@@ -79,16 +99,25 @@
 
             async function onclick_controlToggle() {
                 console.log("Click @ controlToggle");
+                let hiderDiv = document.getElementById("hiderDiv");
                 let graphDiv = document.getElementById("graphDiv");
                 let controlToggle = document.getElementById("controlToggle");
                 const state_controlToggle = getToggleState(controlToggle);
                 await setEnable(!state_controlToggle); // notify back-end
                 setToggleState(controlToggle, !state_controlToggle);
-                showHideElement(graphDiv, !state_controlToggle);
                 if (!state_controlToggle) {
                     curve = await getCurve();
                     buildCurvePlot(curve);
                 }
+                showHideElement(hiderDiv, !state_controlToggle);
+            }
+
+            async function onclick_interpolToggle() {
+                console.log("Click @ interpolToggle");
+                let interpolToggle = document.getElementById("interpolToggle");
+                const state_interpolToggle = getToggleState(interpolToggle);
+                await setInterpol(!state_interpolToggle); // notify back-end
+                setToggleState(interpolToggle, !state_interpolToggle);
             }
 
             async function onclick_plotPoint(e, index) {
@@ -105,22 +134,49 @@
             function buildCurvePlot(curve_points) {
                 // TODO
                 let graphDiv = document.getElementById("graphDiv");
-                let newStr = "<span style=\"font-size:x-small;position:absolute;left:0px;top:0px;\">100%</span><span style=\"font-size:x-small;position:absolute;left:0px;bottom:0px;\">0</span><span style=\"font-size:x-small;position:absolute;left:0px;bottom:50%;writing-mode:vertical-lr;text-orientation:mixed;\">Fan</span><span style=\"font-size:x-small;position:absolute;right:0px;bottom:0px;\">100</span><span style=\"font-size:x-small;position:absolute;left:35%;bottom:0px;\">Temperature (C)</span>";
+                let newStr = "<span style=\"font-size:x-small;position:absolute;left:1px;top:-1px;\">100%</span><span style=\"font-size:x-small;position:absolute;left:1px;bottom:-1px;\">0</span><span style=\"font-size:x-small;position:absolute;left:-2px;bottom:50%;writing-mode:vertical-lr;text-orientation:mixed;\">Fan</span><span style=\"font-size:x-small;position:absolute;right:1px;bottom:-1px;\">100</span><span style=\"font-size:x-small;position:absolute;left:35%;bottom:-1px;\">Temperature (°C)</span>";
                 for (let i = 0; i < curve_points.length; i++) {
                     const point = curve_points[i];
                     newStr += "<span style=\"position:absolute;"
-                    newStr += "top:" + Math.round(point["y"]*PLOT_HEIGHT + OFFSET_Y).toString() + "px;left:" + Math.round(point["x"]*PLOT_WIDTH + OFFSET_X).toString() + "px;";
-                    newStr += "width:8px;height:8px;background-color:red;\" id=\"plotPoint";
+                    newStr += "top:" + Math.round(point["y"]*PLOT_HEIGHT + OFFSET_Y + 1).toString() + "px;left:" + Math.round(point["x"]*PLOT_WIDTH + OFFSET_X + 1).toString() + "px;";
+                    newStr += "width:8px;height:8px;background-color:#1a9fff;border-radius:4px\" id=\"plotPoint";
                     newStr += i.toString() + "\" onclick=\"onclick_plotPoint(event," + i.toString() + ")\"></span>";
                 }
                 graphDiv.innerHTML = newStr;
             }
 
+            function pollStats() {
+                /*getFanRpm().then(speed => {
+                    let fanNow = document.getElementById("fanNow");
+                    fanNow.innerText = speed.toString() + " RPM";
+                });
+                sleep(1).then(_ => {});
+                getTemperature().then(temp => {
+                    let tempNow = document.getElementById("tempNow");
+                    tempNow.innerText = temp.toString() + " °C";
+                });
+                sleep(1).then(_ => {});*/
+                pollStatsAsync().then(_ => {});
+            }
+
+            async function pollStatsAsync() {
+                let fanNow = document.getElementById("fanNow");
+                let tempNow = document.getElementById("tempNow");
+
+                const speed = await getFanRpm();
+                const temp = await getTemperature();
+
+                fanNow.innerText = speed.toString() + " RPM";
+                tempNow.innerText = temp.toString() + " °C";
+            }
+
             function showHideElement(elem, visible) {
                 if (visible) {
                     elem.style.visibility = "visible";
+                    elem.style.height = "auto";
                 } else {
                     elem.style.visibility = "hidden";
+                    elem.style.height = "0px";
                 }
             }
 
@@ -138,9 +194,13 @@
             function getToggleState(toggle) {
                 return toggle.classList.contains("gamepaddialog_On_yLrDA");
             }
+
+            function sleep(ms) {
+                return new Promise(resolve => setTimeout(resolve, ms));
+            }
         </script>
     </head>
-    <body onload="onload_body()">
+    <body onload="onload_body()" style="overflow-x:hidden;">
         <div class="quickaccessmenu_TabGroupPanel_1QO7b Panel Focusable">
             <div class="quickaccesscontrols_PanelSectionRow_26R5w">
                 <div class="quickaccesscontrols_PanelSectionRow_26R5w">
@@ -161,8 +221,63 @@
                 </div>
             </div>
         </div>
-        <div id="graphDiv" style="height:200px;width:284px;border:2px solid red;position:relative;" onclick="onclick_graphDiv(event)">
-            Some text to show that something is broken :(
+        <div id="hiderDiv">
+            <div id="graphDiv" style="height:200px;width:270px;border:1px solid #1a9fff;position:relative;background-color:#1a1f2c;border-radius:4px;" onclick="onclick_graphDiv(event)">
+                Some text to show that something is broken :(
+            </div>
+            <div style="font-size:x-small; text-align:center;">
+            Click to add/remove points on the fan curve.
+            </div>
+            <div class="quickaccessmenu_TabGroupPanel_1QO7b Panel Focusable">
+                <div class="quickaccesscontrols_PanelSectionRow_26R5w">
+                    <div class="quickaccesscontrols_PanelSectionRow_26R5w">
+                        <div class="gamepaddialog_Field_eKmEX gamepaddialog_WithFirstRow_2bDqk gamepaddialog_ExtraPaddingOnChildrenBelow_3nLNL gamepaddialog_StandardPadding_xIITX gamepaddialog_HighlightOnFocus_2HFrm Panel Focusable" style="--indent-level:0;">
+                            <div class="gamepaddialog_FieldLabelRow_2VcTl">
+                                <div class="gamepaddialog_FieldLabel_3jMlJ">
+                                    Linear Interpolation
+                                </div>
+                                <div class="gamepaddialog_FieldChildren_2rhav">
+                                    <div id="interpolToggle" tabindex="0" class="gamepaddialog_Toggle_9Ql-o Focusable" onclick="onclick_interpolToggle()">
+                                        <div class="gamepaddialog_ToggleRail_2bl0i"></div>
+                                        <div class="gamepaddialog_ToggleSwitch_1PQpp"></div>
+                                    </div>
+                                </div>
+                            </div>
+                            <div class="gamepaddialog_FieldDescription_1W1to">Pretends a straight line connects points</div>
+                        </div>
+                    </div>
+                </div>
+            </div>
+        </div>
+        <!-- Fan Info -->
+        <div class="quickaccesscontrols_PanelSection_3gY0a" onclick="updateBatteryStats()" style="margin-bottom:0px;">
+            <!--<div class="quickaccesscontrols_PanelSectionTitle_1IigU">
+                <div class="quickaccesscontrols_Text_1cokl">Fan</div>
+            </div>-->
+            <div class="Panel Focusable" tabindex="0">
+                <div class="quickaccesscontrols_PanelSectionRow_3LM_Z">
+                    <div class="gamepaddialog_Field_eKmEX gamepaddialog_WithFirstRow_2bDqk gamepaddialog_InlineWrapShiftsChildrenBelow_3LCXh gamepaddialog_StandardPadding_xIITX gamepaddialog_HighlightOnFocus_2HFrm Panel Focusable" style="--indent-level:0;padding-left:0px;padding-right:0px;">
+                        <div class="gamepaddialog_FieldLabelRow_2VcTl">
+                            <div class="gamepaddialog_FieldLabel_3jMlJ">Current Fan Speed</div>
+                            <div class="gamepaddialog_FieldChildren_2rhav">
+                                <div class="gamepaddialog_LabelFieldValue_3pteV" id="fanNow"> (|-_-|) </div>
+                            </div>
+                        </div>
+                    </div>
+                </div>
+            </div>
+            <div class="Panel Focusable" tabindex="0">
+                <div class="quickaccesscontrols_PanelSectionRow_3LM_Z">
+                    <div class="gamepaddialog_Field_eKmEX gamepaddialog_WithFirstRow_2bDqk gamepaddialog_InlineWrapShiftsChildrenBelow_3LCXh gamepaddialog_StandardPadding_xIITX gamepaddialog_HighlightOnFocus_2HFrm Panel Focusable" style="--indent-level:0;padding-left:0px;padding-right:0px;">
+                        <div class="gamepaddialog_FieldLabelRow_2VcTl">
+                            <div class="gamepaddialog_FieldLabel_3jMlJ">Current Temperature</div>
+                            <div class="gamepaddialog_FieldChildren_2rhav">
+                                <div class="gamepaddialog_LabelFieldValue_3pteV" id="tempNow"> (|-_-|) </div>
+                            </div>
+                        </div>
+                    </div>
+                </div>
+            </div>
         </div>
     </body>
 </html>