diff --git a/COMMANDS.txt b/COMMANDS.txt
new file mode 100644
index 0000000..e69de29
diff --git a/SI_COMMAND_MESSAGES.txt b/SI_COMMAND_MESSAGES.txt
new file mode 100644
index 0000000..bb6db73
--- /dev/null
+++ b/SI_COMMAND_MESSAGES.txt
@@ -0,0 +1,19 @@
+STOP_STREAM
+START_STREAM
+RESET
+WIPE_STM
+UPTIME
+PING
+GET_STATE
+ARM
+DISARM
+STATIC_FIRE1
+STATIC_FIRE2
+STATIC_FIRE3
+ABORT
+SERVO_SWEEP
+SERVO_SET
+GET_READINGS
+SET_ST_SPEED
+START_FLASH
+START_USB
\ No newline at end of file
diff --git a/SI_LOG_MESSAGES.txt b/SI_LOG_MESSAGES.txt
new file mode 100644
index 0000000..248a8b2
--- /dev/null
+++ b/SI_LOG_MESSAGES.txt
@@ -0,0 +1,27 @@
+        EMPTY_LOG = 0,
+        LOGGING_DATA,
+        FLASH_ERROR,
+        FLASH_START_ERROR,
+        FLASH_FULL,
+        FLASH_LOG_FULL,
+        ENTER_STATIC_FIRE,
+        EXIT_STATIC_FIRE,
+        ENTER_ARM,
+        UPDATE_ARM,
+        EXIT_ARM,
+        LOX_OPEN,
+        LOX_OPEN_FULL,
+        ETHANOL_OPEN,
+        ETHANOL_OPEN_FULL,
+        NITROGEN_OPEN,
+        NITROGEN_OPEN_FULL,
+        LOX_CLOSING,
+        LOX_FULL_CLOSED,
+        ETHANOL_CLOSING,
+        ETHANOL_FULL_CLOSED,
+        NITROGEN_CLOSING,
+        NITROGEN_FULL_CLOSED,
+        ETHANOL_DRAIN_OPEN,
+        LOX_DRAIN_OPEN,
+        ETHANOL_DRAIN_CLOSED,
+        LOX_DRAIN_CLOSED
\ No newline at end of file
diff --git a/Serial_decoder.py b/Serial_decoder.py
new file mode 100644
index 0000000..e825228
--- /dev/null
+++ b/Serial_decoder.py
@@ -0,0 +1,185 @@
+import serial
+from dataclasses import dataclass
+import threading
+from dataclasses import dataclass, field
+from typing import List
+from datetime import datetime
+import queue
+import re
+
+PORT = "COM9"
+
+SerialPort = serial.Serial(port=PORT,baudrate=250000)
+input_queue = queue.SimpleQueue()
+output_queue = queue.SimpleQueue()
+
+
+@dataclass
+class ReturnDecoder:
+    name: str
+    text_respons: str = ""
+    ADC_data: List[int] = field(default_factory=lambda: [])
+    timestamp: int = 0
+    log_message: str = ""
+    bytes_read: int = 0
+
+
+
+#length is 3*16+4+1
+def ADC_FULLRANK(buffer: bytes) -> ReturnDecoder:
+    if len(buffer)<53 : return ReturnDecoder("EMPTY")
+    return_var = ReturnDecoder("ADC_FULLRANK")
+    for i in range(16):
+        return_var.ADC_data.append(int.from_bytes(bytes=buffer[3*i:3+3*i],byteorder="big",signed=True))
+    return_var.timestamp = int.from_bytes(bytes=buffer[48:52],byteorder="big",signed=False)
+    if buffer[52] != 0xFA:
+        return_var.name = f"FAULT_DECODER_END"
+        return_var.bytes_read = 1
+        print(buffer.hex(sep=" "))
+    return_var.bytes_read = 55
+    return return_var
+
+LOG_MESSAGE_ENUM_LIST = []
+with open("SI_LOG_MESSAGES.txt") as file:
+    for message in file:
+        LOG_MESSAGE_ENUM_LIST.append(re.sub("[\n,=0    ]","",message))
+
+def SI_DECODER(buffer: bytes) -> ReturnDecoder:
+    if(len(buffer)<7): return ReturnDecoder("EMPTY")
+    return_var = ReturnDecoder("SI_DECODER")
+    LogNumber = int.from_bytes(bytes=buffer[0:2],byteorder="big",signed=False)
+    try:
+        return_var.log_message = LOG_MESSAGE_ENUM_LIST[LogNumber]
+    except:
+        return_var.name = "WRONG_SI_NUMBER"
+        return_var.log_message = LogNumber
+        return_var.bytes_read = 1
+        return return_var
+    return_var.timestamp = int.from_bytes(bytes=buffer[2:6],byteorder="big",signed=False)
+    if buffer[6] != 0xFA:
+        return_var.bytes_read = 1
+        return_var.name = f"FAULT_SI_DECODER_END"
+        print(buffer.hex(sep=" "))
+    return_var.bytes_read = 7
+    return return_var
+
+
+AF_DECODERS = {
+    0x01: ADC_FULLRANK,
+    0x02: SI_DECODER
+}
+
+def AFDecoder(buffer: bytes) -> ReturnDecoder:
+    if len(buffer) < 2: return ReturnDecoder("EMPTY")
+    ret = ReturnDecoder("FAULT_DECODER")
+    ret.bytes_read = 1
+    if buffer[1] in AF_DECODERS:
+        try:
+            return AF_DECODERS[buffer[1]](buffer[2:])
+        except:
+            return ret
+    else:
+        print("unkown message")
+        return ret
+
+def PRDecoder(buffer: bytes) -> ReturnDecoder:
+    if buffer.find(b"\n") < 0:
+        return ReturnDecoder("EMPTY")
+    temp_str = buffer.decode("ascii",errors="replace")
+    ret = ReturnDecoder("PR_DECODER")
+    ret.text_respons = temp_str.split(sep='\n',maxsplit=2)[0]
+    ret.bytes_read = len(ret.text_respons)
+    return ret
+
+def input_loop():
+    while True:
+        input_str = input()+'\n\r'
+        if input_str.find("exit") != -1:
+            return
+        input_queue.put(input_str)
+
+def output_loop():
+    ret_DEC : ReturnDecoder = ReturnDecoder("EMPTY")
+    buffer : bytes = bytes(b"")
+    SerialPort.timeout = 0.1
+    input_str: str = ""
+    ret_DEC.name = "EMPTY"
+    ret_DEC.bytes_read = 0
+    while True:
+        try:
+            input_str = input_queue.get_nowait()
+            print(f"SD: sending {input_str}")
+            SerialPort.write(input_str.encode("ascii"))
+        except:
+            pass
+        buffer = buffer + SerialPort.read_all()
+        AF_index = buffer.find(0xAF)
+        PR_index = buffer.find(b"PR")
+        if AF_index >= 0 and PR_index >= 0:
+            if AF_index < PR_index:
+                #if(AF_index): print(buffer[:AF_index].decode("ascii","replace"))
+                buffer = buffer[AF_index:]
+                ret_DEC = AFDecoder(buffer)
+            else:
+                #if(PR_index): print(buffer[:PR_index].decode("ascii","replace"))
+                buffer = buffer[PR_index:]
+                ret_DEC = PRDecoder(buffer)
+        elif AF_index >= 0:
+            #if(AF_index): print(buffer[:AF_index].decode("ascii","replace"))
+            buffer = buffer[AF_index:]
+            ret_DEC = AFDecoder(buffer)
+        elif PR_index >= 0:
+            #if(PR_index): print(buffer[:PR_index].decode("ascii","replace"))
+            buffer = buffer[PR_index:]
+            ret_DEC = PRDecoder(buffer)
+
+        if ret_DEC.bytes_read != 0:
+            buffer = buffer[ret_DEC.bytes_read:]
+        if ret_DEC.name != "EMPTY":
+            output_queue.put(ret_DEC)
+            ret_DEC = ReturnDecoder("EMPTY")
+        
+        
+def GetReturn(timeout: float) -> ReturnDecoder | None:
+    try:
+        return output_queue.get(timeout=timeout)
+    except queue.Empty:
+        return None
+
+def SendCommand(input_str: str):
+    input_queue.put(input_str)
+
+def StartInputOutput() -> tuple[threading.Thread, threading.Thread]:
+    t1 = threading.Thread(target=output_loop,daemon=True)
+    t2 = threading.Thread(target=input_loop, daemon=True)
+    t1.start()
+    t2.start()
+    return (t1,t2)
+
+def StartOutput() -> threading.Thread:
+    t1 = threading.Thread(target=output_loop,daemon=True)
+    t1.start()
+    return t1
+
+if __name__ == "__main__":
+    t1 = threading.Thread(target=output_loop,daemon=True)
+    t2 = threading.Thread(target=input_loop)
+    t1.start()
+    t2.start()
+    while True:
+        value = GetReturn(0.5)
+        if t2.is_alive() == False:
+            break
+        if value == None:
+            continue
+        match value.name:
+            case "ADC_FULLRANK":
+                print(f"time:{value.timestamp},{value.ADC_data}")
+            case "SI_DECODER":
+                print(f"\033[Ftime:{value.timestamp}, SI:{value.log_message}",end="\r")
+            case "PR_DECODER":
+                print(f"PRD:{value.text_respons}")
+            case _:
+                print(f"Error {value.name}")
+    print("stopping")
+
diff --git a/mainplot.py b/mainplot.py
new file mode 100644
index 0000000..6c18de5
--- /dev/null
+++ b/mainplot.py
@@ -0,0 +1,168 @@
+
+import Serial_decoder as SD
+import tkinter as tk
+from tkinter import ttk
+from datetime import datetime
+import time
+from collections import deque
+
+# Matplotlib embedding in Tkinter
+from matplotlib.figure import Figure
+from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
+
+# === Serial threads (unchanged) ===
+tasks = SD.StartInputOutput()  # t1: output_loop (daemon), t2: input_loop (daemon)
+FILENAME = f"SaveData/{datetime.today().strftime('%Y_%m_%d_%H_%M')}"
+
+# === Plot history ===
+MAX_POINTS = 100  # rolling window length
+history_x = deque(maxlen=MAX_POINTS)                 # timestamps
+history_y = [deque(maxlen=MAX_POINTS) for _ in range(16)]  # per-channel values
+
+# === GUI setup ===
+root = tk.Tk()
+root.title("Live 4x4 Grid + Selectable Real-Time Plot")
+
+# Left: 4x4 grid
+grid_frame = ttk.Frame(root)
+grid_frame.grid(row=0, column=0, padx=10, pady=10, sticky="n")
+
+labels = []
+for row in range(4):
+    for col in range(4):
+        idx = row * 4 + col
+        lbl = tk.Label(
+            grid_frame, name=f"channel{idx}",
+            text="0", width=10, height=3,
+            borderwidth=2, relief="groove", font=("Arial", 14)
+        )
+        lbl.grid(row=row, column=col, padx=5, pady=5)
+        labels.append(lbl)
+
+# Last tick label (as you had)
+last_tick_lbl = tk.Label(
+    grid_frame, text="Last Tick: -", width=20, height=3,
+    borderwidth=2, relief="groove", font=("Arial", 14)
+)
+lbl = tk.Label(root, text="Last Tick:0", width=20, height=3, borderwidth=2, relief="groove", font=("Arial", 14))
+lbl.grid(row = 4, column=0, columnspan=2)
+labels.append(lbl)
+lbl = tk.Label(root, text="Delta Tick:0", width=20, height=3, borderwidth=2, relief="groove", font=("Arial", 14))
+lbl.grid(row=4, column=2, columnspan= 2)
+labels.append(lbl)
+
+# Checkboxes to select plotted channels
+check_frame = ttk.LabelFrame(root, text="Plot Selection")
+check_frame.grid(row=1, column=0, padx=10, pady=(0, 10), sticky="nw")
+
+check_vars = []
+for i in range(16):
+    var = tk.IntVar(value=0)
+    chk = ttk.Checkbutton(check_frame, text=f"Ch {i+1}", variable=var, command=lambda: update_plot())
+    chk.grid(row=i//4, column=i%4, sticky="w", padx=4, pady=2)
+    check_vars.append(var)
+
+# Right: Matplotlib plot
+plot_frame = ttk.Frame(root)
+plot_frame.grid(row=0, column=1, rowspan=2, padx=10, pady=10, sticky="n")
+
+fig = Figure(figsize=(6, 4), dpi=100)
+ax = fig.add_subplot(111)
+ax.set_title("Selected Channels (rolling)")
+ax.set_xlabel("Timestamp")
+ax.set_ylabel("Value")
+canvas = FigureCanvasTkAgg(fig, master=plot_frame)
+canvas.get_tk_widget().pack(fill="both", expand=True)
+
+# Optional controls
+controls_frame = ttk.Frame(plot_frame)
+controls_frame.pack(fill="x", pady=5)
+# Clear selection button
+def clear_selection():
+    for v in check_vars:
+        v.set(0)
+    update_plot()
+ttk.Button(controls_frame, text="Clear Selection", command=clear_selection).pack(side="left")
+
+# === Update functions ===
+Last_tick: int = 0
+def update_grid(values: list,tick: int):
+    global Last_tick
+    with open(f"{FILENAME}_ADC.csv","+a") as file:
+        file.write(f"{tick}")
+        for i in range(16):
+            file.write(f",{values[i]}")
+            labels[i].config(text=f"{values[i]:n}")
+        labels[16].config(text=f"Last Tick:{tick:n}")
+        labels[17].config(text=f"Delta Tick:{(tick-Last_tick):n}")
+        Last_tick = tick
+        file.write("\n")
+
+
+def update_SI(value:SD.ReturnDecoder):
+    with open(f"{FILENAME}_SI.csv","+a") as file:
+        file.write(f"{value.timestamp},{value.log_message}\n")
+        print(f"\033[F\033[2Ktime:{value.timestamp}, SI:{value.log_message}",end="\n")
+
+def append_history(adc_values: list, timestamp: int):
+    """Store the new sample in the rolling history."""
+    history_x.append(timestamp)
+    for i in range(16):
+        history_y[i].append(adc_values[i])
+
+def update_plot():
+    """Redraw plot based on selected channels and available history."""
+    ax.clear()
+    ax.set_title("Selected Channels (rolling)")
+    ax.set_xlabel("Timestamp")
+    ax.set_ylabel("Value")
+
+    selected = [i for i, var in enumerate(check_vars) if var.get() == 1]
+    if len(history_x) == 0 or len(selected) == 0:
+        ax.text(0.5, 0.5, "No data / No channels selected", ha="center", va="center", transform=ax.transAxes)
+        canvas.draw()
+        return
+
+    x = list(history_x)
+    for idx in selected:
+        y = list(history_y[idx])
+        ax.plot(x, y, label=f"Ch {idx+1}")
+    ax.legend(loc="upper left", fontsize=8)
+    ax.grid(True, linestyle="--", alpha=0.3)
+    canvas.draw()
+
+def update_panel():
+    """Main polling loop that consumes Serial_decoder outputs (unchanged structure)."""
+
+    values: SD.ReturnDecoder = SD.GetReturn(0.1)  # non-blocking read with timeout
+    if values is None:
+        root.after(10, update_panel)
+        return
+
+    # Stop if input thread died
+    if tasks[1].is_alive() == False:
+        root.quit()
+
+    match values.name:
+        case "ADC_FULLRANK":
+            # Update grid + history + plot
+            update_grid(values=values.ADC_data, tick=values.timestamp)
+            append_history(values.ADC_data, values.timestamp)
+            update_plot()  # draw right away; if too heavy, throttle with a timer
+        case "SI_DECODER":
+            update_SI(values)
+        case "PR_DECODER":
+            print(f"PRD:{values.text_respons}")
+        case _:
+            print(f"Error {values.name}")
+
+    # Continue polling
+    root.after(10, update_panel)  # 10 ms
+
+# Start polling and GUI loop
+update_panel()
+
+# FC commands
+SD.SerialPort.write(b"SET_ST_SPEED 100\n\r")
+
+root.mainloop()