diff --git a/src/channel.rs b/src/channel.rs
index f38564e..c688f0e 100644
--- a/src/channel.rs
+++ b/src/channel.rs
@@ -1,6 +1,7 @@
 use stm32f4xx_hal::hal::digital::v2::OutputPin;
 use crate::{
     ad5680,
+    ad7172,
     channel_state::ChannelState,
     pins::{ChannelPins, ChannelPinSet},
 };
@@ -27,8 +28,8 @@ pub struct Channel<C: ChannelPins> {
 }
 
 impl<C: ChannelPins> Channel<C> {
-    pub fn new(mut pins: ChannelPinSet<C>) -> Self {
-        let state = ChannelState::default();
+    pub fn new(mut pins: ChannelPinSet<C>, adc_calibration: ad7172::ChannelCalibration) -> Self {
+        let state = ChannelState::new(adc_calibration);
         let mut dac = ad5680::Dac::new(pins.dac_spi, pins.dac_sync);
         let _ = dac.set(0);
         // power up TEC
diff --git a/src/channel_state.rs b/src/channel_state.rs
index 195a4e0..8152161 100644
--- a/src/channel_state.rs
+++ b/src/channel_state.rs
@@ -12,6 +12,7 @@ use crate::{
 
 pub struct ChannelState {
     pub adc_data: Option<u32>,
+    pub adc_calibration: ad7172::ChannelCalibration,
     pub adc_time: Instant,
     pub dac_value: ElectricPotential,
     pub pid_engaged: bool,
@@ -19,10 +20,11 @@ pub struct ChannelState {
     pub sh: sh::Parameters,
 }
 
-impl Default for ChannelState {
-    fn default() -> Self {
+impl ChannelState {
+    pub fn new(adc_calibration: ad7172::ChannelCalibration) -> Self {
         ChannelState {
             adc_data: None,
+            adc_calibration,
             adc_time: Instant::from_secs(0),
             dac_value: ElectricPotential::new::<volt>(0.0),
             pid_engaged: false,
@@ -30,17 +32,26 @@ impl Default for ChannelState {
             sh: sh::Parameters::default(),
         }
     }
-}
 
-impl ChannelState {
-    /// Update PID state on ADC input, calculate new DAC output
-    pub fn update_pid(&mut self, now: Instant, adc_data: u32) -> f64 {
+    pub fn update(&mut self, now: Instant, adc_data: u32) {
         self.adc_data = Some(adc_data);
         self.adc_time = now;
+    }
 
+    /// Update PID state on ADC input, calculate new DAC output
+    pub fn update_pid(&mut self) -> f64 {
         // Update PID controller
-        let input = (adc_data as f64) / (ad7172::MAX_VALUE as f64);
-        let temperature = self.sh.get_temperature(input);
-        self.pid.update(temperature)
+        self.pid.update(self.get_temperature().unwrap())
+    }
+
+    pub fn get_adc(&self) -> Option<ElectricPotential> {
+        let volts = self.adc_calibration.convert_data(self.adc_data?);
+        Some(ElectricPotential::new::<volt>(volts))
+    }
+
+    pub fn get_temperature(&self) -> Option<f64> {
+        let r = self.get_adc()?.get::<volt>();
+        let temperature = self.sh.get_temperature(r);
+        Some(temperature)
     }
 }
diff --git a/src/channels.rs b/src/channels.rs
index 5900f4c..17ae9af 100644
--- a/src/channels.rs
+++ b/src/channels.rs
@@ -26,20 +26,23 @@ pub struct Channels {
 
 impl Channels {
     pub fn new(pins: pins::Pins) -> Self {
-        let channel0 = Channel::new(pins.channel0);
-        let channel1 = Channel::new(pins.channel1);
-        let pins_adc = pins.pins_adc;
-        let pwm = pins.pwm;
-
         let mut adc = ad7172::Adc::new(pins.adc_spi, pins.adc_nss).unwrap();
         // Feature not used
         adc.set_sync_enable(false).unwrap();
 
         // Setup channels and start ADC
         adc.setup_channel(0, ad7172::Input::Ain0, ad7172::Input::Ain1).unwrap();
+        let adc_calibration0 = adc.get_calibration(0)
+            .expect("adc_calibration0");
         adc.setup_channel(1, ad7172::Input::Ain2, ad7172::Input::Ain3).unwrap();
+        let adc_calibration1 = adc.get_calibration(1)
+            .expect("adc_calibration1");
         adc.start_continuous_conversion().unwrap();
 
+        let mut channel0 = Channel::new(pins.channel0, adc_calibration0);
+        let mut channel1 = Channel::new(pins.channel1, adc_calibration1);
+        let pins_adc = pins.pins_adc;
+        let pwm = pins.pwm;
         let mut channels = Channels { channel0, channel1, adc, pins_adc, pwm };
         for channel in 0..CHANNELS {
             channels.calibrate_dac_value(channel);
diff --git a/src/main.rs b/src/main.rs
index 265147d..a08747a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -119,10 +119,6 @@ fn main() -> ! {
     usb::State::setup(usb);
 
     let mut channels = Channels::new(pins);
-    let adc_calibration = [
-        channels.adc.get_calibration(0).unwrap(),
-        channels.adc.get_calibration(1).unwrap(),
-    ];
 
     #[cfg(not(feature = "generate-hwaddr"))]
     let hwaddr = EthernetAddress(NET_HWADDR);
@@ -181,13 +177,13 @@ fn main() -> ! {
 
                                             let state = channels.channel_state(channel);
                                             let _ = writeln!(
-                                                socket, "channel {}: t={} adc_raw{}=0x{:06X} adc{}={:.3}V vref={} dac_feedback={} itec={} tec={} tec_u_meas={}",
+                                                socket, "channel {}: t={} adc{}={} vref={} dac_feedback={} itec={} tec={} tec_u_meas={} r={:03}",
                                                 channel,
                                                 state.adc_time, channel, adc_data,
-                                                channel, adc_calibration[channel].convert_data(adc_data),
                                                 vref.into_format_args(volt, Abbreviation), dac_feedback.into_format_args(volt, Abbreviation),
                                                 itec.into_format_args(volt, Abbreviation), tec_i.into_format_args(ampere, Abbreviation),
                                                 tec_u_meas.into_format_args(volt, Abbreviation),
+                                                (tec_u_meas / tec_i).into_format_args(ohm, Abbreviation),
                                             );
                                         } else {
                                             let _ = writeln!(socket, "channel {}: no adc input", channel);
@@ -398,9 +394,9 @@ fn main() -> ! {
                             let state = &mut channels.channel_state(usize::from(channel));
                             let adc_data = state.adc_data.unwrap_or(0);
                             let _ = writeln!(
-                                socket, "t={} raw{}=0x{:06X} value={:.3}V",
+                                socket, "t={} raw{}=0x{:06X} value={}",
                                 state.adc_time, channel, adc_data,
-                                adc_calibration[channel].convert_data(adc_data),
+                                state.get_adc().unwrap().into_format_args(volt, Abbreviation),
                             ).map(|_| {
                                 session.mark_report_sent(channel);
                             });