diff --git a/src/components/modbus_component.py b/src/components/modbus_component.py
index 20618f3..55b89fe 100644
--- a/src/components/modbus_component.py
+++ b/src/components/modbus_component.py
@@ -14,12 +14,6 @@ else:
 
 from .component import Component
 
-# from pymodbus.client.sync import ModbusSerialClient as ModbusClient
-# import serial
-# client = ModbusClient(method="rtu", port="COM3", stopbits=serial.STOPBITS_ONE, bytesize=serial.EIGHTBITS, parity=serial.PARITY_NONE, baudrate=115200, timeout=1, strict=False)
-# client.connect()
-# client.read_holding_registers(1, count=1)
-
 
 class ModbusComponent(Component):
     def __init__(self, config=None, name=None, period=1, lazy=True, paused=False, threaded=True, registers=None):
diff --git a/src/components/tecna_marposs_provaset_t3_registers.py b/src/components/tecna_marposs_provaset_t3_registers.py
index 3b66ed3..08d22f5 100644
--- a/src/components/tecna_marposs_provaset_t3_registers.py
+++ b/src/components/tecna_marposs_provaset_t3_registers.py
@@ -81,7 +81,7 @@ registers = {
         2: "BLOCKAGE TEST",
         3: "LEAK TEST WITH VOLUME CHECK",
         4: "BURST TEST",
-    },}],
+    }, }],
     "Testing in progress: progressive sequence index": [48, {"dt": "16bit_uint", }],
     "Testing in progress: graphical sampling rate": [49, {"dt": "16bit_uint", }],
     "Testing in progress: number of samples of the graph": [50, {"dt": "16bit_uint", }],
diff --git a/src/main.py b/src/main.py
index d2efd41..4fec119 100644
--- a/src/main.py
+++ b/src/main.py
@@ -12,6 +12,7 @@ from pathlib import Path
 
 app = None
 
+
 def quit_app(signalnum=None, handler=None):
     logging.info(f"quitting app. signal: {signalnum!r}, handler: {handler!r}")
     global app
@@ -51,10 +52,9 @@ logging.basicConfig(
 
 try:
     # IMPORT PROJECT ONLY AFTER SETTING UP SIGNAL, FAULTHANDLER AND LOGGHING
-    from components import (ArchiveSynchronizer, NeoPixels,
-                            Os_Label_Printer, RemoteAPI,
-                            TecnaMarpossProvasetT3, TestComponent, Vision,
-                            VisionSaver)
+    from components import (ArchiveSynchronizer, NeoPixels, Os_Label_Printer,
+                            RemoteAPI, TecnaMarpossProvasetT3, TestComponent,
+                            Vision, VisionSaver)
     from lib.db import Users
     from lib.helpers import ConfigReader
     from PyQt5.QtCore import QObject, QThread, pyqtSignal
diff --git a/src/test/chart_memory_usage.py b/src/test/chart_memory_usage.py
new file mode 100755
index 0000000..1d53d92
--- /dev/null
+++ b/src/test/chart_memory_usage.py
@@ -0,0 +1,56 @@
+#!/usr/bin/env python3
+import sys
+import traceback
+from time import perf_counter
+
+import pyqtgraph as pg
+from pyqtgraph.Qt.QtCore import QTimer
+from pyqtgraph.Qt.QtWidgets import QApplication, QGridLayout, QWidget
+
+interval_ms = 250
+statm_index = 0  # use 5 to limit showing size of data + stack
+
+
+class App(QWidget):
+    def __init__(self):
+        super().__init__()
+        # GUI SETUP
+        self.layout = QGridLayout()
+        self.setLayout(self.layout)
+        # CHART SETUP
+        self.plot_widget = pg.PlotWidget()
+        self.plot_widget.enableAutoRange()
+        self.layout.addWidget(self.plot_widget)
+        self.plot_data = {"time": [], "size": []}
+        self.plot = self.plot_widget.plot(*self.plot_data.values())
+        # print(self.plot)
+        # self.plot_widget.addItem(self.plot)
+        # DATA SETUP
+        self.pid = sys.argv[1]
+        self.statm_file = f"/proc/{self.pid}/statm"
+        # PERIODIC SETUP
+        self.timer = QTimer()
+        # self.timer.setSingleShot(True)
+        self.timer.setInterval(interval_ms)
+        self.timer.timeout.connect(self.add_data)
+        self.start = perf_counter()
+        self.timer.start()
+
+    def add_data(self):
+        try:
+            with open(self.statm_file, "r") as f:
+                statm = f.read()
+            self.plot_data["time"].append(perf_counter() - self.start)
+            statm = statm.split()
+            self.plot_data["size"].append(int(statm[statm_index]))
+            self.plot.setData(*self.plot_data.values())
+        except Exception:
+            traceback.print_exc()
+        self.timer.start()
+
+
+if __name__ == "__main__":
+    app = QApplication(sys.argv)
+    window = App()
+    window.show()
+    sys.exit(app.exec_())