diff --git a/.gitmodules b/.gitmodules
index d62bfd9..9ad52c8 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -3,4 +3,7 @@
 	url = https://github.com/HyperloopUPV-H8/ST-LIB
 [submodule "Core/Inc/Communications/JSON_ADE"]
 	path= Core/Inc/Communications/JSON_ADE
-	url = https://github.com/HyperloopUPV-H8/JSON_ADE
\ No newline at end of file
+	url = https://github.com/HyperloopUPV-H8/JSON_ADE
+[submodule "Tests/VirtualMCU"]
+	path = Tests/VirtualMCU
+	url = https://github.com/HyperloopUPV-H8/VirtualMCU
diff --git a/Core/Src/main.cpp b/Core/Src/main.cpp
index 15c27b2..0f791f0 100644
--- a/Core/Src/main.cpp
+++ b/Core/Src/main.cpp
@@ -7,8 +7,15 @@
 #include "ST-LIB.hpp"
 
 int main(void) {
+#ifdef SIM_ON
+    SharedMemory::start();
+#endif
+
+    DigitalOutput led_on(PA1);
     STLIB::start();
 
+    Time::register_low_precision_alarm(100, [&]() { led_on.toggle(); });
+
     while (1) {
         STLIB::update();
     }
diff --git a/Tests/VirtualMCU b/Tests/VirtualMCU
new file mode 160000
index 0000000..fac66f1
--- /dev/null
+++ b/Tests/VirtualMCU
@@ -0,0 +1 @@
+Subproject commit fac66f1bfa86e65c0a7845f31b36dec31b61ccbf
diff --git a/Tests/runner.py b/Tests/runner.py
new file mode 100644
index 0000000..ea4ce90
--- /dev/null
+++ b/Tests/runner.py
@@ -0,0 +1,138 @@
+import subprocess
+from argparse import ArgumentParser
+import time
+
+
+class DuplicatedTestError(Exception):
+    def __init__(self, name):
+        self._name = name
+
+    def __str__(self):
+        return f"Test {self._name} is duplicated"
+
+
+class UnitUnderTest:
+    def __init__(self, executable):
+        self._executable = executable
+    
+    def __enter__(self):
+        self._process = subprocess.Popen(
+            self._executable,
+            shell=True,
+            stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE,
+            text=True
+        )
+
+    def __exit__(self, *args):
+        try:
+            out, err = self._process.communicate(timeout=1)
+        except Exception:
+            self._process.kill()
+            try:
+                out, err = self._process.communicate(timeout=1)
+            except Exception:
+                out = "Error recovering stdout"
+                err = "Error recovering stderr"
+        
+        if out:
+            print(f"  * UUT stdout:\n{out}")
+        if err:
+            print(f"  * UUT stderr:\n{err}")
+
+
+class Test:
+    def __init__(self, func):
+        self._func = func
+        self._prepare = None
+        self._cleanup = None
+
+    def __call__(self, *args, **kwargs):
+        return self._func(*args, **kwargs)
+    
+    def prepare(self):
+        def decorator(prepare_func):
+            nonlocal self
+            self._prepare = prepare_func
+            return prepare_func
+
+        return decorator
+    
+    def cleanup(self):
+        def decorator(cleanup_func):
+            nonlocal self
+            self._cleanup = cleanup_func
+            return cleanup_func
+
+        return decorator
+
+    def run_prepare(self):
+        if self._prepare is not None:
+            self._prepare()
+    
+    def run_cleanup(self):
+        if self._cleanup is not None:
+            self._cleanup()
+
+class TestRunner:
+
+    def __init__(self, uut_executable):
+        self._prepare = {}
+        self._tests = {}
+        self._cleanup = {}
+        self._uut = UnitUnderTest(uut_executable)
+
+    # Registers a new test in the runner, name is infered from the function name
+    def test(self):
+        def decorator(test_func):
+            nonlocal self
+
+            if test_func.__name__ in self._tests:
+                raise DuplicatedTestError(test_func.__name__)
+            
+            self._tests[test_func.__name__] = Test(test_func)
+
+            return self._tests[test_func.__name__]
+        
+        return decorator
+    
+    
+    # Runs all the registered tests, cleaning up after each test
+    def run(self):
+        for name, test in self._tests.items():
+            try:
+                test.run_prepare()
+
+                with self._uut:
+                    time.sleep(0.1)
+                    try:
+                        print(f"[{name}] Running...")
+                        result = test()
+                        print(f"[{name}] Succesfull!")
+                        if result is not None:
+                            print(f"  * Result: {result}")
+                    except Exception as reason:
+                        print(f"[{name}] Failed!")
+                        print(f"  * Reason: {reason}")
+
+                test.run_cleanup()
+            except KeyboardInterrupt:
+                print(f"[{name}] Keyboard Interrupt. Aborted.")
+
+
+
+parser = ArgumentParser(
+    prog="test",
+    description="run multiple simulator tests on a target executable"
+)
+
+parser.add_argument(
+    "-uut",
+    "--executable",
+    required=True,
+    help="full path to the target executable"
+)
+
+args = parser.parse_args()
+
+runner = TestRunner(args.executable)
diff --git a/Tests/test.py b/Tests/test.py
new file mode 100644
index 0000000..aa6cdfc
--- /dev/null
+++ b/Tests/test.py
@@ -0,0 +1,50 @@
+import sys, os
+sys.path.append(os.path.join(os.path.dirname(__file__), "VirtualMCU", "src"))
+
+from runner import runner
+from vmcu.shared_memory import SharedMemory
+from vmcu.pin import Pinout, DigitalOut
+from vmcu.services.digital_out import DigitalOutService
+from vmcu.assertions import *
+
+
+@runner.test()
+def led_toggle():
+    TOGGLE_PERIOD = milliseconds(100 * 2)
+    ALLOWED_SLACK = milliseconds(5)
+
+    shm = SharedMemory("gpio__blinking_led", "state_machine__blinking_led")
+    led = DigitalOutService(shm, Pinout.PA1)
+
+    def led_turns_on():
+        nonlocal led
+        return led.get_pin_state() is DigitalOut.State.High
+
+    def led_turns_off():
+        nonlocal led
+        return led.get_pin_state() is DigitalOut.State.Low
+
+    #sync with board
+    completes(
+        wait_until_true(led_turns_on),
+        before=(TOGGLE_PERIOD / 2) + ALLOWED_SLACK,
+        msg="Sync fails"
+    )
+
+    for i in range(150):
+        completes(
+            wait_until_true(led_turns_off),
+            before=(TOGGLE_PERIOD / 2) + ALLOWED_SLACK,
+            after=(TOGGLE_PERIOD / 2) - ALLOWED_SLACK,
+            msg="turns off"
+        )
+        completes(
+            wait_until_true(led_turns_on),
+            before=(TOGGLE_PERIOD / 2) + ALLOWED_SLACK,
+            after=(TOGGLE_PERIOD / 2) - ALLOWED_SLACK,
+            msg="turns on"
+        )
+        print("toggle", i)
+    
+
+runner.run() # Runs the tests, do not delete!