diff --git a/firmware/.gitignore b/firmware/.gitignore
new file mode 100644
index 0000000..3fe18ad
--- /dev/null
+++ b/firmware/.gitignore
@@ -0,0 +1,3 @@
+.pio
+CMakeListsPrivate.txt
+cmake-build-*/ 
diff --git a/firmware/CMakeLists.txt b/firmware/CMakeLists.txt
new file mode 100644
index 0000000..e241a23
--- /dev/null
+++ b/firmware/CMakeLists.txt
@@ -0,0 +1,33 @@
+# !!! WARNING !!! AUTO-GENERATED FILE, PLEASE DO NOT MODIFY IT AND USE
+# https://docs.platformio.org/page/projectconf/section_env_build.html#build-flags
+#
+# If you need to override existing CMake configuration or add extra,
+# please create `CMakeListsUser.txt` in the root of project.
+# The `CMakeListsUser.txt` will not be overwritten by PlatformIO.
+
+cmake_minimum_required(VERSION 3.13)
+set(CMAKE_SYSTEM_NAME Generic)
+set(CMAKE_C_COMPILER_WORKS 1)
+set(CMAKE_CXX_COMPILER_WORKS 1)
+
+project("untitled" C CXX)
+
+include(CMakeListsPrivate.txt)
+
+if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/CMakeListsUser.txt)
+include(CMakeListsUser.txt)
+endif()
+
+add_custom_target(
+    Production ALL
+    COMMAND platformio -c clion run "$<$<NOT:$<CONFIG:All>>:-e${CMAKE_BUILD_TYPE}>"
+    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+)
+
+add_custom_target(
+    Debug ALL
+    COMMAND platformio -c clion debug "$<$<NOT:$<CONFIG:All>>:-e${CMAKE_BUILD_TYPE}>"
+    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+)
+
+add_executable(Z_DUMMY_TARGET ${SRC_LIST})
diff --git a/firmware/README.md b/firmware/README.md
new file mode 100644
index 0000000..9e0d564
--- /dev/null
+++ b/firmware/README.md
@@ -0,0 +1,7 @@
+
+## Run
+
+### View logs
+
+* `screen /dev/cu.usbserial-142140 9600`
+* Use `↓Ctrl ↓a ↑a ↓\ ↑\` to exit.
\ No newline at end of file
diff --git a/firmware/include/README b/firmware/include/README
new file mode 100644
index 0000000..194dcd4
--- /dev/null
+++ b/firmware/include/README
@@ -0,0 +1,39 @@
+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the usual convention is to give header files names that end with `.h'.
+It is most portable to use only letters, digits, dashes, and underscores in
+header file names, and at most one dot.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html
diff --git a/firmware/lib/README b/firmware/lib/README
new file mode 100644
index 0000000..6debab1
--- /dev/null
+++ b/firmware/lib/README
@@ -0,0 +1,46 @@
+
+This directory is intended for project specific (private) libraries.
+PlatformIO will compile them to static libraries and link into executable file.
+
+The source code of each library should be placed in a an own separate directory
+("lib/your_library_name/[here are source files]").
+
+For example, see a structure of the following two libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional, custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
+|  |
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |
+|  |- README --> THIS FILE
+|
+|- platformio.ini
+|--src
+   |- main.c
+
+and a contents of `src/main.c`:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+PlatformIO Library Dependency Finder will find automatically dependent
+libraries scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html
diff --git a/firmware/platformio.ini b/firmware/platformio.ini
new file mode 100644
index 0000000..d453463
--- /dev/null
+++ b/firmware/platformio.ini
@@ -0,0 +1,14 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:wemos_d1_uno32]
+platform = espressif32
+board = wemos_d1_uno32
+framework = arduino
\ No newline at end of file
diff --git a/firmware/src/main.cpp b/firmware/src/main.cpp
new file mode 100644
index 0000000..2f8fcdb
--- /dev/null
+++ b/firmware/src/main.cpp
@@ -0,0 +1,70 @@
+#include <Arduino.h>
+#include <chrono>
+#include <cinttypes>
+
+#define u64 uint64_t
+#define timeMillis() std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch()).count()
+#define min(a, b) ((a) < (b) ? (a) : (b))
+
+u64 start_time = 0;
+
+const int NUM_SENSORS = 2;
+int pins[] = {34, 39};   // GPIO34
+int notes[] = {84, 86};  // C6, D6
+int lasts[NUM_SENSORS];  // variable to store the value coming from the sensor
+u64 last_hit_times[NUM_SENSORS];
+
+int max_sensor = 4096;
+int max_threshold = 700;
+int active_threshold = 400;  // Minimum value to be considered as a hit
+
+void setup()
+{
+    // Initialize pin and serial
+    for (int pin : pins) pinMode(pin, INPUT);
+    Serial.begin(9600);
+    Serial.printf("Initialized\r\n");
+
+    start_time = timeMillis();
+}
+
+/**
+ * Called when the sensor value changes
+ *
+ * @param id Sensor index
+ */
+void on_sensor_update(int id, u64 time, int last, int current)
+{
+    // If the last value is larger than the current value, check timeout
+    if (last > current && last > active_threshold) {
+        u64 elapsed = time - last_hit_times[id];
+        if (elapsed < 150) {
+            // If the last hit is too close, ignore this hit
+            return;
+        }
+
+        // The last value is a local maximum,
+        // and we read it as the hit strength of our note. Send midi command to the host.
+        // /hit <note> <velocity>
+        Serial.printf("/hit %d %d\r\n", notes[id], min((last - active_threshold) * 127 / (max_threshold - active_threshold), 127));
+
+        // Update last hit time
+        last_hit_times[id] = time;
+    }
+}
+
+void loop() {
+    u64 time = timeMillis();
+
+    // Read sensor value from each pin
+    for (int i = 0; i < NUM_SENSORS; i++) {
+        int v = analogRead(pins[i]);
+        if (v != lasts[i]) {
+            u64 elapsed = time - start_time;
+            Serial.printf("Sensor #%d - %" PRIu64 ": %d\r\n", i, elapsed, v);
+
+            on_sensor_update(i, time, lasts[i], v);
+        }
+        lasts[i] = v;
+    }
+}
\ No newline at end of file
diff --git a/models/ringring.py b/models/ringring.py
new file mode 100644
index 0000000..d4d142d
--- /dev/null
+++ b/models/ringring.py
@@ -0,0 +1,41 @@
+# A REST-API webhook endpoint for OctoEverywhere to make a noise when a print is done.
+import os
+
+import fastapi
+import uvicorn
+
+import logging
+from rich.logging import RichHandler
+
+FORMAT = "%(message)s"
+logging.basicConfig(
+    level="NOTSET", format=FORMAT, datefmt="[%X]", handlers=[RichHandler()]
+)
+
+log = logging.getLogger("rich")
+
+# Create HTTP Server
+app = fastapi.FastAPI()
+
+
+# Create a webhook endpoint
+@app.post('/webhook')
+async def webhook(request: fastapi.Request):
+    # log.info(f"Request: {request}")
+    # log.info(f"Request Headers: {request.headers}")
+    # log.info(f"Request Query: {request.query_params}")
+
+    # Get the JSON body
+    obj = await request.json()
+    if obj.get('Progress') == 100:
+        # Make a noise
+        os.system("say 'Meow Meow Meow! Print Complete, Print Complete, Meow Meow Meow Meow Meow!'")
+
+    log.info(obj)
+
+    return 'OK'
+
+
+if __name__ == '__main__':
+    # Run the server
+    uvicorn.run(app, host='0.0.0.0', port=8484)
\ No newline at end of file