python & random gen esp32

11_python_ziskani_dat/poznamky.txt

@@ -0,0 +1,6 @@
+mkdir 11_python_ziskani_dat
+cd 11_python_ziskani_dat
+python -m venv .venv
+.venv\Scripts\activate
+pip install matplotlib pyserial
+code .

11_python_ziskani_dat/serial_read.py

@@ -0,0 +1,16 @@
+import serial
+#---nastaveni---
+PORT = "COM3" #JE POTŘEBA ZMĚNIT PODLE REALNÉHO ESP
+BAUDRATE = "115200"
+ser = serial.Serial(PORT,BAUDRATE,timeout=2)
+print(f"připojeno na {PORT}@{BAUDRATE} baud")
+try:
+    while True:
+        line = ser.readline().decode("utf-8").strip()
+        if line:
+            print(line)
+except KeyboardInterrupt:
+    pass
+finally:
+    ser.close()
+    print("Odpojeno")

11_python_ziskani_dat/serial_teplota_graf.py

@@ -0,0 +1,74 @@
+import serial
+import matplotlib.pyplot as plt
+import matplotlib.animation as animation
+from datetime import datetime
+
+# -- NASTAVENÍ --
+PORT = "COM3"
+BAUDRATE = "115200"
+MAX_POINTS = 50
+
+# Seznamy pro ukládání dat
+casy = []
+teploty = []
+
+# připojení na Seriovou linku
+ser = serial.Serial(PORT, BAUDRATE, timeout=2)
+print(f"Připojeno na {PORT}@{BAUDRATE} baud")
+
+#vytvoření grafu
+fig, ax = plt.subplots(figsize=(10,4))
+fig.suptitle("ESP32 - teplota v realném čase")
+
+#metoda pro dynamické vykreslování grafu
+def update(frame):
+    """Přečte řáděk ze seriové linky a aktualizuje graf"""
+    if ser.in_waiting > 0:
+        try:
+            line = ser.readline().decode("utf-8").strip()
+            if not line:
+                return
+            
+            #parsování - hledáme "teplota:XX.X"
+            #formát původní "teplota:XX.X,vlhkost:XX.X"
+            parts = line.split(",")
+            teplota = None
+            for part in parts:
+                key, value = part.split(":")
+                if key.strip() == "teplota":
+                    teplota = float(value.strip())
+            if teplota is None:
+                return
+            now = datetime.now().strftime("%H:%M:%S")
+            casy.append(now)
+            teploty.append(teplota)
+            #omezení na MAX_POINTS
+            if len(casy) > MAX_POINTS:
+                casy.pop(0)
+                teploty.pop(0)
+            
+            #vykreslení
+            ax.clear()
+            ax.plot(casy,teploty,"o",markersize=3,label="Teplota")
+            ax.set_ylabel("Teplota")
+            ax.set_xlabel("čas")
+            ax.legend(loc="upper left")
+            ax.grid(True)
+            ax.tick_params(axis="x",roation=45)
+
+            fig.tight_layout()
+            print(f"{now} teplota: {teplota}")
+
+
+        except (ValueError,UnicodeDecodeError) as e:
+            print(f"Chyba: {e}")
+
+#spuštění animace
+ani = animation.FuncAnimation(fig,update,interval=500,cache_frame_data=False)
+try:
+    plt.show()
+except KeyboardInterrupt:
+    pass
+finally:
+    ser.close()
+    print("Odpojeno.")

esp_random_temp_hum/.gitignore

@@ -0,0 +1,5 @@
+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

esp_random_temp_hum/.vscode/extensions.json

@@ -0,0 +1,10 @@
+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack"
+    ]
+}

esp_random_temp_hum/include/README

@@ -0,0 +1,37 @@
+
+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 convention is to give header files names that end with `.h'.
+
+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

esp_random_temp_hum/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 the executable file.
+
+The source code of each library should be placed in a separate directory
+("lib/your_library_name/[Code]").
+
+For example, see the structure of the following example libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional. for 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
+
+Example contents of `src/main.c` using Foo and Bar:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+The PlatformIO Library Dependency Finder will find automatically dependent
+libraries by scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html

esp_random_temp_hum/platformio.ini

@@ -0,0 +1,15 @@
+; 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:esp32dev]
+platform = espressif32
+board = esp32dev
+framework = arduino
+monitor_speed = 115200

esp_random_temp_hum/src/main.cpp

@@ -0,0 +1,16 @@
+#include <Arduino.h>
+float teplota = 22.0;
+float vlhkost = 40.0;
+void setup() {
+  Serial.begin(115200);
+}
+void loop() {
+  teplota = 22.0 + random(-50,50)/10.0;
+  vlhkost = 45.0 + random(-30,30)/10.0;
+  //formát: "teplota:XX.X,vlhkost:YY.Y"
+  Serial.print("teplota:");
+  Serial.print(teplota,1);
+  Serial.print(",vlhkost:");
+  Serial.println(vlhkost,1);
+  delay(1000);
+}

esp_random_temp_hum/test/README

@@ -0,0 +1,11 @@
+
+This directory is intended for PlatformIO Test Runner and project tests.
+
+Unit Testing is a software testing method by which individual units of
+source code, sets of one or more MCU program modules together with associated
+control data, usage procedures, and operating procedures, are tested to
+determine whether they are fit for use. Unit testing finds problems early
+in the development cycle.
+
+More information about PlatformIO Unit Testing:
+- https://docs.platformio.org/en/latest/advanced/unit-testing/index.html