diff --git a/growpi.toml b/growpi.toml
index ddc8e4f..676be69 100644
--- a/growpi.toml
+++ b/growpi.toml
@@ -5,7 +5,12 @@ logic_level = 3.299999952316284
 light_pin = 0
 fan_pin = 1
 water_pump_pin = 2
-relay_gpio_pins = [17, 27, 22, -1]
+relay_gpio_pins = [
+    17,
+    27,
+    22,
+    -1,
+]
 
 [soil_moisture_settings]
 pin = 1
@@ -19,6 +24,7 @@ voltage_divider_resistance = 9700.0
 nominal_resistance = 10000.0
 nominal_temperature = 298.1499938964844
 thermal_constant = 3950.0
+resistor = "R2"
 
 [water_pump_settings]
-milliseconds_to_grams = 0.06914
+grams_per_millisecond = 0.05280999839305878
diff --git a/src/cli_mode.rs b/src/cli_mode.rs
index 82d1207..08c179d 100644
--- a/src/cli_mode.rs
+++ b/src/cli_mode.rs
@@ -67,7 +67,7 @@ fn command_temp(args: &[&str], config: &Configuration) -> GenericResult<()> {
     loop {
         let temperature = sensors::get_temperature(config)?;
         println!("Temperature: {}C", temperature);
-        if show_loop {
+        if !show_loop {
             break;
         }
         thread::sleep(Duration::from_secs(1));
@@ -84,7 +84,7 @@ fn command_soil(args: &[&str], config: &Configuration) -> GenericResult<()> {
     loop {
         let humidity = sensors::get_soil_moisture(config)?;
         println!("Soil humidity: {}", humidity);
-        if show_loop {
+        if !show_loop {
             break;
         }
         thread::sleep(Duration::from_secs(1));
@@ -143,7 +143,7 @@ fn command_ana(args: &[&str]) -> GenericResult<()> {
     loop {
         let voltage = get_input_voltage(pin)?;
         println!("Voltage read: {}", voltage);
-        if show_loop {
+        if !show_loop {
             break;
         }
         thread::sleep(Duration::from_secs(1));
@@ -188,8 +188,11 @@ fn init_state(config: &Configuration) -> GenericResult<ProgramState> {
 pub fn run_cli() {
     let mut rl = init_readline().unwrap();
 
-    let config =
-        Configuration::from_file(std::path::Path::new("./growpi.toml")).unwrap_or_default();
+    let config = Configuration::from_file(std::path::Path::new("./growpi.toml"));
+    if let Err(config) = &config {
+        println!("Could not load config: {}", config);
+    }
+    let config = config.unwrap_or_default();
 
     let mut program_state = init_state(&config).unwrap();
 
diff --git a/src/config.rs b/src/config.rs
index 4ba95fb..ad2a9ea 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -17,6 +17,13 @@ pub struct ThermistorSettings {
     pub nominal_resistance: f32,
     pub nominal_temperature: f32,
     pub thermal_constant: f32,
+    pub resistor: VoltageDividerResistor,
+}
+
+#[derive(Serialize, Deserialize)]
+pub enum VoltageDividerResistor {
+    R1,
+    R2,
 }
 
 #[derive(Serialize, Deserialize)]
@@ -81,6 +88,7 @@ impl Default for Configuration {
                 nominal_resistance: 10_000.,
                 nominal_temperature: 298.15,
                 thermal_constant: 3950.,
+                resistor: VoltageDividerResistor::R2,
             },
             water_pump_settings: WaterPumpSettings {
                 grams_per_millisecond: 0.05281,
diff --git a/src/control.rs b/src/control.rs
new file mode 100644
index 0000000..e69de29
diff --git a/src/sensors.rs b/src/sensors.rs
index f8df28d..be1c6dc 100644
--- a/src/sensors.rs
+++ b/src/sensors.rs
@@ -2,8 +2,14 @@ use crate::{config::*, error::GenericResult, io::get_input_voltage};
 
 pub fn get_temperature(config: &Configuration) -> GenericResult<f32> {
     let voltage = get_input_voltage(config.thermistor_settings.pin)?;
-    let resistance = (config.board_settings.logic_level / voltage - 1.)
-        * config.thermistor_settings.voltage_divider_resistance;
+
+    let k = config.board_settings.logic_level / voltage - 1.;
+    let k = match config.thermistor_settings.resistor {
+        VoltageDividerResistor::R1 => k,
+        VoltageDividerResistor::R2 => 1. / k,
+    };
+    let resistance = k * config.thermistor_settings.voltage_divider_resistance;
+
     let temperature = 1.
         / ((1. / config.thermistor_settings.nominal_temperature)
             + (1. / config.thermistor_settings.thermal_constant