diff --git a/Cargo.lock b/Cargo.lock
index 3764ad5..bbe00bd 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -340,6 +340,27 @@ dependencies = [
  "void",
 ]
 
+[[package]]
+name = "embedded-layout"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7adbc16ba694006a121bce08a8935186d16cb008a4c9e20c5e346517ad1e0ac8"
+dependencies = [
+ "embedded-graphics",
+ "embedded-layout-macros",
+]
+
+[[package]]
+name = "embedded-layout-macros"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "352186cee85e4cf9104c42b4dfd0295a22901c5d2bf0c26efd47265adcf1c52d"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+]
+
 [[package]]
 name = "embedded-sdmmc"
 version = "0.3.0"
@@ -821,11 +842,13 @@ dependencies = [
  "cfg-if",
  "embedded-graphics",
  "embedded-graphics-simulator",
+ "embedded-layout",
  "embedded-sdmmc",
  "embedded-text",
  "epd-waveshare",
  "maduino_zero_4g",
  "panic-halt",
+ "static_assertions",
  "tz-rs",
  "tzdb",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index a067b98..ce5a626 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,11 +11,13 @@ arrayvec = { version = "0.7.4", default_features = false }
 atsamd-hal = { version = "0.15.1", default_features = false, features = ["samd21g", "samd21g-rt", "usb"] }
 cfg-if = "1.0.0"
 embedded-graphics = "0.7.1"
+embedded-layout = "0.2.0"
 embedded-text = "0.5.0"
 embedded-sdmmc = { version = "0.3.0", default_features = false }
 epd-waveshare = "0.5.0"
 maduino_zero_4g = { git = "https://github.com/ZettaScript/atsamd", branch = "maduino-zero-4g", features = ["usb"] }
 panic-halt = "0.2.0"
+static_assertions = "1.1.0"
 tz-rs = { version = "0.6.14", default_features = false, features = ["const"] }
 tzdb = { version = "0.5.7", optional = true }
 
diff --git a/README.md b/README.md
index be8b40b..8d44bba 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,11 @@ GSM will be shutting down in France in a few years so if you have an old cellpho
 ## Install tools
 
 ```bash
+# Choose one line depending on your distro
 sudo pacman -S arm-none-eabi-gcc
+sudo apt install gcc-arm-none-eabi
+
+# Install Rust target
 rustup target add thumbv6m-none-eabi
 ```
 
diff --git a/src/apps/dial.rs b/src/apps/dial.rs
index 234c037..7de9d86 100644
--- a/src/apps/dial.rs
+++ b/src/apps/dial.rs
@@ -69,6 +69,7 @@ impl App for Dial {
 				}
 				Key::OptionRight => {
 					if mode_state.line.pop().is_some() {
+						// TODO redraw background over the erased character
 						mode_state.line_changed = true;
 					} else {
 						return Some(ModeState::Clock(Default::default()));
diff --git a/src/keypad.rs b/src/keypad.rs
index c2300c6..dbaa953 100644
--- a/src/keypad.rs
+++ b/src/keypad.rs
@@ -69,8 +69,7 @@ impl Keypad {
 
 	#[cfg(feature = "simulator")]
 	fn get_keys(&self) -> [bool; NB_KEYS] {
-		use embedded_graphics_simulator::sdl2::Keycode;
-		use embedded_graphics_simulator::SimulatorEvent;
+		use embedded_graphics_simulator::{sdl2::Keycode, SimulatorEvent};
 
 		let mut keys = [false; NB_KEYS];
 		crate::display::window_mut()
@@ -88,7 +87,7 @@ impl Keypad {
 					Keycode::Num8 | Keycode::Kp8 => Some(Key::D8),
 					Keycode::Num9 | Keycode::Kp9 => Some(Key::D9),
 					Keycode::KpEnter | Keycode::Return => Some(Key::Enter),
-					Keycode::Asterisk => Some(Key::Asterisk),
+					Keycode::Asterisk | Keycode::KpMultiply => Some(Key::Asterisk),
 					Keycode::Hash | Keycode::KpHash => Some(Key::Hash),
 					// TODO more
 					_ => None,
@@ -148,19 +147,22 @@ impl KeyEvent {
 	pub fn get_char(&self, key_input_mode: KeyInputMode) -> Option<char> {
 		use Key::*;
 		match key_input_mode {
-			KeyInputMode::Digit => match self.key {
-				D0 => Some('0'),
-				D1 => Some('1'),
-				D2 => Some('2'),
-				D3 => Some('3'),
-				D4 => Some('4'),
-				D5 => Some('5'),
-				D6 => Some('6'),
-				D7 => Some('7'),
-				D8 => Some('8'),
-				D9 => Some('9'),
-				Asterisk => Some('*'),
-				Hash => Some('#'),
+			KeyInputMode::Digit => match (self.key, self.repeats) {
+				(D0, _) => Some('0'),
+				(D1, _) => Some('1'),
+				(D2, _) => Some('2'),
+				(D3, _) => Some('3'),
+				(D4, _) => Some('4'),
+				(D5, _) => Some('5'),
+				(D6, _) => Some('6'),
+				(D7, _) => Some('7'),
+				(D8, _) => Some('8'),
+				(D9, _) => Some('9'),
+				(Asterisk, 1) => Some('*'),
+				(Asterisk, 2) => Some('+'),
+				(Asterisk, 3) => Some('p'),
+				(Asterisk, 4) => Some('W'),
+				(Hash, _) => Some('#'),
 				_ => None,
 			},
 			_ => {
diff --git a/src/main.rs b/src/main.rs
index 859301a..0456869 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -10,6 +10,7 @@ mod gui;
 mod keypad;
 mod state;
 mod strf;
+mod text_input;
 mod time;
 
 use apps::App;
@@ -21,7 +22,10 @@ use state::*;
 use arrayvec::ArrayString;
 use core::fmt::Write;
 use embedded_graphics::{
-	mono_font::{ascii::FONT_10X20, ascii::FONT_6X10, ascii::FONT_9X15, MonoTextStyleBuilder},
+	mono_font::{
+		ascii::{FONT_10X20, FONT_6X10, FONT_9X15},
+		MonoTextStyleBuilder,
+	},
 	pixelcolor::BinaryColor,
 	prelude::*,
 	primitives::{Line, PrimitiveStyle, PrimitiveStyleBuilder, Rectangle, StrokeAlignment},
@@ -41,6 +45,22 @@ use maduino_zero_4g::{
 use panic_halt as _;
 use tz::DateTime;
 
+// Check that stack overflow is unlikely
+#[cfg(not(feature = "simulator"))]
+static_assertions::const_assert!(
+	core::mem::size_of::<(
+		State,
+		ModeState,
+		Peripherals,
+		maduino_zero_4g::Pins,
+		CorePeripherals,
+		keypad::Keypad,
+		Display,
+		Context,
+		fs::Fs,
+	)>() < 16 * 1024
+);
+
 #[cfg_attr(not(feature = "simulator"), bsp::entry)]
 fn main() -> ! {
 	cfg_if::cfg_if! {
diff --git a/src/text_input.rs b/src/text_input.rs
new file mode 100644
index 0000000..4e73609
--- /dev/null
+++ b/src/text_input.rs
@@ -0,0 +1,6 @@
+use arrayvec::ArrayString;
+
+pub struct TextInput<const N: usize> {
+	cursor: usize,
+	value: ArrayString<N>,
+}