diff --git a/firmware/src/electrometer.rs b/firmware/src/electrometer.rs
index 9ee58b6..96693a9 100644
--- a/firmware/src/electrometer.rs
+++ b/firmware/src/electrometer.rs
@@ -85,11 +85,3 @@ impl Electrometer {
         }
     }
 }
-
-impl ElectrometerStatus {
-    pub fn debug_print(&self) {
-        if self.ic.is_some() {
-            println!("ion: {}nA", 1e9*self.ic.unwrap());
-        }
-    }
-}
diff --git a/firmware/src/index.html b/firmware/src/index.html
index a75e298..238719c 100644
--- a/firmware/src/index.html
+++ b/firmware/src/index.html
@@ -21,13 +21,25 @@
 </div>
 
 <div class="w3-container">
-<p>Pressure:</p>
+<h3>Pressure</h3>
+<div class="w3-card w3-xxlarge">
+{pressure:.1e} mbar
 </div>
-<div class="w3-container w3-xxlarge">
-2.3×10<sup>-7</sup> mbar
 </div>
 
 <div class="w3-container">
+  <h3>Details</h3>
+  <table class="w3-table">
+    <tr><th>Parameter</th><th>Current</th><th>Target</th></tr>
+    <tr><td>Anode regulator ready</td><td>{anode_ready}</td></tr>
+    <tr><td>Anode voltage</td><td>{anode_av:.1}V</td></tr>
+    <tr><td>Cathode regulator ready</td><td>{cathode_ready}</td></tr>
+    <tr><td>Electron current</td><td>{cathode_fbi:.0}μA</td></tr>
+    <tr><td>Filament voltage</td><td>{cathode_fv:.2}V</td><td>{cathode_fv_target:.2}V</td></tr>
+    <tr><td>Cathode bias</td><td>{cathode_fbv:.1}V</td></tr>
+    <tr><td>Ion current</td><td>{ion_current:.5}nA</td></tr>
+  </table>
+
 <p>
 At local time:
 <script language="Javascript">
diff --git a/firmware/src/loop_anode.rs b/firmware/src/loop_anode.rs
index 923557e..45702c7 100644
--- a/firmware/src/loop_anode.rs
+++ b/firmware/src/loop_anode.rs
@@ -67,12 +67,3 @@ impl Controller {
         }
     }
 }
-
-impl ControllerStatus {
-    pub fn debug_print(&self) {
-        println!("anode rdy: {}", self.ready);
-        if self.av.is_some() {
-            println!("voltage: {}V", self.av.unwrap());
-        }
-    }
-}
diff --git a/firmware/src/loop_cathode.rs b/firmware/src/loop_cathode.rs
index 50ef50b..1e7f61e 100644
--- a/firmware/src/loop_cathode.rs
+++ b/firmware/src/loop_cathode.rs
@@ -157,18 +157,3 @@ impl Controller {
     }
 
 }
-
-impl ControllerStatus {
-    pub fn debug_print(&self) {
-        println!("cathode rdy: {}", self.ready);
-        if self.fbi.is_some() {
-            println!("emi: {}mA", 1000.0*self.fbi.unwrap());
-        }
-        if self.fv.is_some() {
-            println!("fil: {}V", self.fv.unwrap());
-        }
-        if self.fbv.is_some() {
-            println!("bias: {}V", self.fbv.unwrap());
-        }
-    }
-}
diff --git a/firmware/src/main.rs b/firmware/src/main.rs
index ac194c6..7e0aa2c 100644
--- a/firmware/src/main.rs
+++ b/firmware/src/main.rs
@@ -32,7 +32,7 @@ macro_rules! println {
 
 #[no_mangle]
 #[lang = "panic_fmt"]
-fn panic_fmt(args: core::fmt::Arguments, file: &'static str, line: u32) -> ! {
+pub fn panic_fmt(args: core::fmt::Arguments, file: &'static str, line: u32) -> ! {
     println!("panic at {}:{}: {}", file, line, args);
     loop {}
 }
@@ -191,7 +191,6 @@ fn main() {
     board::start_adc();
 
     let mut next_blink = 0;
-    let mut next_info = 0;
     let mut led_state = true;
     let mut latch_reset_time = None;
     loop {
@@ -211,7 +210,7 @@ fn main() {
                 match request_status {
                     Ok(true) => {
                         if socket.can_send() {
-                            pages::serve(socket, &request);
+                            pages::serve(socket, &request, &LOOP_ANODE, &LOOP_CATHODE, &ELECTROMETER);
                         }
                         request.reset();
                         socket.close();
@@ -239,27 +238,6 @@ fn main() {
             board::set_led(1, led_state);
         }
 
-        if time >= next_info {
-            let (anode, cathode, electrometer) = cortex_m::interrupt::free(|cs| {
-                (LOOP_ANODE.borrow(cs).borrow().get_status(),
-                 LOOP_CATHODE.borrow(cs).borrow().get_status(),
-                 ELECTROMETER.borrow(cs).borrow().get_status())
-            });
-
-            println!("");
-            anode.debug_print();
-            cathode.debug_print();
-            electrometer.debug_print();
-            if cathode.fbi.is_some() && electrometer.ic.is_some() {
-                let fbi = cathode.fbi.unwrap();
-                let ic = electrometer.ic.unwrap();
-                let pressure = ic/fbi/18.75154;
-                println!("{:.1e} mbar", pressure);
-            }
-
-            next_info = next_info + 1000;
-        }
-
         board::process_errors();
         if board::error_latched() {
             match latch_reset_time {
diff --git a/firmware/src/pages.rs b/firmware/src/pages.rs
index cf2a162..28ba298 100644
--- a/firmware/src/pages.rs
+++ b/firmware/src/pages.rs
@@ -1,13 +1,65 @@
+use core::fmt;
 use core::fmt::Write;
+use core::cell::RefCell;
+use cortex_m;
+use cortex_m::interrupt::Mutex;
 use smoltcp::socket::TcpSocket;
-use http;
 
-pub fn serve(output: &mut TcpSocket, request: &http::Request) {
+use http;
+use loop_anode;
+use loop_cathode;
+use electrometer;
+
+struct OpnFmt(Option<f32>);
+
+impl fmt::Display for OpnFmt {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self.0 {
+            None => f.write_str("ERROR"),
+            Some(x) => x.fmt(f)
+        }
+    }
+}
+
+impl fmt::LowerExp for OpnFmt {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self.0 {
+            None => f.write_str("ERROR"),
+            Some(x) => x.fmt(f)
+        }
+    }
+}
+
+pub fn serve(output: &mut TcpSocket, request: &http::Request,
+             loop_anode_m: &Mutex<RefCell<loop_anode::Controller>>,
+             loop_cathode_m: &Mutex<RefCell<loop_cathode::Controller>>,
+             electrometer_m: &Mutex<RefCell<electrometer::Electrometer>>) {
     match request.get_path().unwrap() {
         b"/" => {
-            let data = include_str!("index.html");
+            let (anode, cathode, electrometer) = cortex_m::interrupt::free(|cs| {
+                (loop_anode_m.borrow(cs).borrow().get_status(),
+                 loop_cathode_m.borrow(cs).borrow().get_status(),
+                 electrometer_m.borrow(cs).borrow().get_status())
+            });
+
+            let pressure = electrometer.ic.and_then(|ic| {
+                if ic > 1.0e-12 {
+                    cathode.fbi.and_then(|fbi| Some(ic/fbi/18.75154))
+                } else {
+                    None
+                }
+            });
             http::write_reply_header(output, 200, "text/html; charset=utf-8", false).unwrap();
-            output.write_str(data).unwrap();
+            write!(output, include_str!("index.html"),
+                pressure=OpnFmt(pressure),
+                anode_ready=anode.ready,
+                anode_av=OpnFmt(anode.av),
+                cathode_ready=cathode.ready,
+                cathode_fbi=OpnFmt(cathode.fbi.and_then(|x| Some(x*1.0e6))),
+                cathode_fv=OpnFmt(cathode.fv),
+                cathode_fv_target=OpnFmt(cathode.fv_target),
+                cathode_fbv=OpnFmt(cathode.fbv),
+                ion_current=OpnFmt(electrometer.ic.and_then(|x| Some(x*1.0e9)))).unwrap();
         },
         b"/style.css" => {
             let data = include_bytes!("style.css.gz");