diff --git a/CMakeLists.txt b/CMakeLists.txt
index e97dcc4..430e256 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -32,7 +32,7 @@ pico_set_program_name(raspi_keyer "raspi_keyer")
 pico_set_program_version(raspi_keyer "0.0.1")
 
 pico_enable_stdio_uart(raspi_keyer 1)
-pico_enable_stdio_usb(raspi_keyer 0)
+pico_enable_stdio_usb(raspi_keyer 1)
 
 target_compile_options(raspi_keyer PRIVATE -Wall -Wextra -Werror)
 
@@ -52,6 +52,7 @@ target_link_libraries(raspi_keyer
   hardware_exception
   hardware_pwm
   pico_flash
+  pico_multicore
 )
 
 pico_add_extra_outputs(raspi_keyer)
diff --git a/src/keyer.cpp b/src/keyer.cpp
index 3e81201..3efe547 100644
--- a/src/keyer.cpp
+++ b/src/keyer.cpp
@@ -56,7 +56,7 @@ void Keyer::run()
         if (left_paddle_pressed() && right_paddle_pressed())
         {
             m_keyNextIambicB = false;
-            
+
             if (m_previousState == State::Dit)
             {
                 state = State::Dah;
@@ -141,16 +141,56 @@ void Keyer::run()
             m_pausing_until = make_timeout_time_us(m_elementDuration);
             m_currentlyPausing = true;
         }
-
-        if (absolute_time_diff_us(timestamp, m_pausing_until) <= 0)
+        // Handle the case when the other paddle is pressed during the inter character space
+        else if (absolute_time_diff_us(timestamp, m_pausing_until) > 0)
         {
-            m_currentlyPausing = false;
-            state = State::Wait;
+            if (left_paddle_pressed() && m_previousState == State::Dah && m_nextState == State::Wait)
+            {
+                printf("--- Pause --- Next state is Dit!\n");
+                m_nextState = State::Dit;
+
+                m_keyNextIambicB = right_paddle_pressed() ? true : false;
+            }
+            else if (right_paddle_pressed() && m_previousState == State::Dit && m_nextState == State::Wait)
+            {
+                printf("--- Pause --- Next state is Dah!\n");
+                m_nextState = State::Dah;
+
+                m_keyNextIambicB = left_paddle_pressed() ? true : false;
+            }
+            else if (m_previousState == State::Wait)
+            {
+                m_nextState = State::Wait;
+            }
+        }
+        else
+        {
+
+            if (absolute_time_diff_us(timestamp, m_pausing_until) <= 0)
+            {
+                m_currentlyPausing = false;
+                state = m_nextState;
+                m_nextState = State::Wait;
+            }
         }
 
         break;
-
+    case State::Abort:
+        gpio_put(LED_PIN, 0);
+        m_Sidetone.off();
+        m_keyNextIambicB = false;
+        m_currentlyPausing = false;
+        m_currentlyKeying = false;
+        m_previousState = State::Abort;
+        m_nextState = State::Wait;
+        state = State::Wait;
+        break;
     default:
         break;
     }
+}
+
+void Keyer::stop()
+{
+    state = State::Abort;
 }
\ No newline at end of file
diff --git a/src/keyer.h b/src/keyer.h
index bc32db9..8732030 100644
--- a/src/keyer.h
+++ b/src/keyer.h
@@ -15,6 +15,7 @@ public:
         Dit,
         Dah,
         InterCharSpace,
+        Abort,
     };
     Keyer() = delete;
     Keyer(uint8_t wpm, Mode mode);
@@ -23,10 +24,12 @@ public:
     void setSpeed(uint8_t wpm);
 
     void run();
+    void stop();
 
 private:
     State state{State::Wait};
     State m_previousState{State::Wait};
+    State m_nextState{State::Wait};
     uint8_t m_wpm{18};
     Mode m_mode{Mode::IAMBIC_B};
     uint64_t m_elementDuration{0};
diff --git a/src/raspi_keyer.cpp b/src/raspi_keyer.cpp
index 984a45c..20538f0 100644
--- a/src/raspi_keyer.cpp
+++ b/src/raspi_keyer.cpp
@@ -1,6 +1,8 @@
 #include <stdio.h>
 
 #include "pico/stdlib.h"
+#include "pico/multicore.h"
+#include "pico/util/queue.h"
 
 #include "settings.h"
 #include "keyer.h"
@@ -13,7 +15,24 @@ namespace
 extern const uint LED_PIN = PICO_DEFAULT_LED_PIN;
 extern const uint LEFT_PADDLE_PIN = 14;
 extern const uint RIGHT_PADDLE_PIN = 15;
-extern const uint BUZZER_PIN = 13;
+extern const uint BUZZER_PIN = 18;
+
+// Stuff for communicating between cores
+enum class KeyerQueueCommand
+{
+    Run,
+    Stop,
+    Config,
+    Wait,
+};
+struct KeyerQueueData
+{
+    KeyerQueueCommand cmd;
+    uint8_t wpm;
+    Mode mode;
+};
+
+queue_t keyerQueue;
 
 void setup()
 {
@@ -30,23 +49,67 @@ void setup()
     gpio_set_dir(RIGHT_PADDLE_PIN, GPIO_IN);
     gpio_pull_up(RIGHT_PADDLE_PIN);
 
-    sleep_ms(1000);
+    //sleep_ms(1000);
+}
+
+/* Let's do all the keying stuff in the second core, so there are no timing problems. */
+void core1_main()
+{
+    printf("Hello from core1!\n");
+    KeyerQueueData data;
+    queue_remove_blocking(&keyerQueue, &data);
+
+    Keyer keyer(data.wpm, data.mode);
+
+    while (true)
+    {
+        queue_try_remove(&keyerQueue, &data);
+
+        switch (data.cmd)
+        {
+        case KeyerQueueCommand::Run:
+            keyer.run();
+            break;
+        case KeyerQueueCommand::Stop:
+            keyer.stop();
+            data.cmd = KeyerQueueCommand::Wait;
+            break;
+        case KeyerQueueCommand::Config:
+            keyer.setSpeed(data.wpm);
+            keyer.setMode(data.mode);
+            data.cmd = KeyerQueueCommand::Run;
+            break;
+        case KeyerQueueCommand::Wait:
+            break;
+        default:
+            break;
+        }
+    }
 }
 
 int main()
 {
-    timer_hw->dbgpause = 0; // workaround for problem with debug and sleep_ms
+    timer_hw->dbgpause = 1; // workaround for problem with debug and sleep_ms
                             // https://github.com/raspberrypi/pico-sdk/issues/1152#issuecomment-1418248639
 
     setup();
 
-    Settings settings{read_settings()};
+    printf("Hello from core0!\n");
 
-    Keyer keyer(settings.wpm, settings.mode);
+    Settings settings{read_settings()};
+    settings.wpm = 25; // TODO: remove!
+
+    queue_init(&keyerQueue, sizeof(KeyerQueueData), 2);
+    multicore_reset_core1();
+    multicore_launch_core1(core1_main);
+
+    KeyerQueueData keyerQueueData{KeyerQueueCommand::Run, settings.wpm, settings.mode};
+    queue_add_blocking(&keyerQueue, &keyerQueueData);
 
     while (true)
     {
-        keyer.run();
+        // Currently there's nothing to do on core0
+        sleep_ms(1000);
     }
 
     return 0;