diff --git a/13_sqlite_python/01_sqlite_zaklad.py b/13_sqlite_python/01_sqlite_zaklad.py
new file mode 100644
index 0000000..b754b75
--- /dev/null
+++ b/13_sqlite_python/01_sqlite_zaklad.py
@@ -0,0 +1,37 @@
+import sqlite3
+
+conn = sqlite3.connect("iot_data.sqlite")
+cursor = conn.cursor()
+
+cursor.execute("""
+    CREATE TABLE IF NOT EXISTS mereni (
+        id  INTEGER PRIMARY KEY AUTOINCREMENT,
+        cas TEXT NOT NULL,
+        teplota REAL NOT NULL,
+        vlhkost REAL NOT NULL           
+    )
+""")
+conn.commit()
+print("Tabulka mereni vytovřena (nebo již existuje).☺")
+
+testovaci_data = [
+    ("2026-03-18 08:00:00", 22.5,45.0),
+    ("2026-03-18 08:05:00", 23.5,48.0),
+    ("2026-03-18 08:10:00", 23.2,44.0),
+    ("2026-03-18 08:15:00", 22.8,49.0),
+    ("2026-03-18 08:20:00", 25.2,60.0),
+]
+cursor.executemany(
+    "INSERT INTO mereni (cas, teplota, vlhkost) VALUES (?, ?, ?)",
+    testovaci_data
+)
+conn.commit()
+print(f"Vloženo {len(testovaci_data)} záznamů")
+
+print("--- Všechna měření ---")
+cursor.execute("SELECT * FROM mereni")
+for radek in cursor.fetchall():
+    print(radek)
+
+conn.close()
+print("\nHotovo! Soubor iot_data.db vytvořen")
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diff --git a/13_sqlite_python/02_serial_to_sqlite.py b/13_sqlite_python/02_serial_to_sqlite.py
new file mode 100644
index 0000000..e69de29
diff --git a/13_sqlite_python/03_sql_dotazy.py b/13_sqlite_python/03_sql_dotazy.py
new file mode 100644
index 0000000..9b81c66
--- /dev/null
+++ b/13_sqlite_python/03_sql_dotazy.py
@@ -0,0 +1,37 @@
+import sqlite3
+
+conn = sqlite3.connect("iot_data.sqlite")
+cursor = conn.cursor()
+
+# Počet záznamů
+cursor.execute("SELECT COUNT(*) FROM mereni")
+pocet = cursor.fetchone()[0]
+print(f"Celkem záznamů v databázi: {pocet}\n")
+
+if pocet == 0:
+    print("Databaze je prázdná! spusťte nejdřív 01 nebo 04")
+    conn.close()
+    exit()
+
+# Pruměrná teplota a vlhkost
+cursor.execute("SELECT AVG(teplota), AVG(vlhkost) FROM mereni")
+avg_t, avg_v = cursor.fetchone()
+print(f"Průmerná teplota: {avg_t:.1f}°C")
+print(f"Průmerná vlhkost: {avg_v:.1f}%")
+
+#Maximalní a minimální hodnoty
+cursor.execute("SELECT MAX(teplota), MIN(teplota) FROM mereni")
+max_t, min_t = cursor.fetchone()
+print(f"Maximální teplota: {max_t:.1f}°C")
+print(f"Minimální teplota: {min_t:.1f}°C")
+
+cursor.execute("SELECT MAX(vlhkost), MIN(vlhkost) FROM mereni")
+max_v, min_v = cursor.fetchone()
+print(f"Maximální vlhkost: {max_v:.1f}°C")
+print(f"Minimální vlhkost: {min_v:.1f}°C")
+
+#Měření s teploutou nad 25°C
+cursor.execute("SELECT COUNT(*) FROM mereni WHERE teplota > 25")
+nad_25 = cursor.fetchone()[0]
+print(f"\nPočet měření s teplotou > 25°C: {nad_25}x")
+
diff --git a/13_sqlite_python/04_demo_generator.py b/13_sqlite_python/04_demo_generator.py
new file mode 100644
index 0000000..ccc5be6
--- /dev/null
+++ b/13_sqlite_python/04_demo_generator.py
@@ -0,0 +1,45 @@
+import sqlite3
+import random
+from datetime import datetime, timedelta
+
+DB_FILE = "iot_data.sqlite"
+POCET_MERENI = 50
+
+conn = sqlite3.connect(DB_FILE)
+cursor = conn.cursor()
+
+cursor.execute("""
+    CREATE TABLE IF NOT EXISTS mereni (
+        id  INTEGER PRIMARY KEY AUTOINCREMENT,
+        cas TEXT NOT NULL,
+        teplota REAL NOT NULL,
+        vlhkost REAL NOT NULL           
+    )
+""")
+conn.commit()
+print("Tabulka mereni vytovřena (nebo již existuje).☺")
+
+#Generovani dat - začínáme od aktualního času, měření probíha každých 5 vteřin
+cas_start = datetime.now() - timedelta(seconds=POCET_MERENI*5)
+zakladni_teplota = 22.0 #píšeme .0 z důvodu toho aby se počítalo s FLOAT dat.typem
+zakladni_vlhkost = 50.0
+
+data= []
+for i in range(POCET_MERENI):
+    cas = cas_start + timedelta(seconds=i*5)
+    #Simulace realistickych hodnot s mírným kolísáním
+    teplota = round(zakladni_teplota + random.uniform(-3.0,5.0),1)
+    vlhkost = round(zakladni_vlhkost + random.uniform(-20.0,15.0),1)
+    data.append((cas.strftime("%Y-%m-%d %H:%M:%S"),teplota,vlhkost))
+
+cursor.executemany(
+    "INSERT INTO mereni (cas, teplota, vlhkost) VALUES (?, ?, ?)",
+    data
+)
+conn.commit()
+print(f"Vygenerováno {POCET_MERENI} měření do {DB_FILE}")
+print(f"Časový rozsah: {data[0][0]} - {data[-1][0]}")
+print(f"Ukázka prvních 5 záznamů:")
+for cas, t, v in data[:5]:
+    print(f"{cas} | {t}°C | {v}%")
+conn.close()
\ No newline at end of file
diff --git a/13_sqlite_python/05_print.py b/13_sqlite_python/05_print.py
new file mode 100644
index 0000000..3fb0072
--- /dev/null
+++ b/13_sqlite_python/05_print.py
@@ -0,0 +1,12 @@
+import sqlite3
+
+conn = sqlite3.connect("iot_data.sqlite")
+cursor = conn.cursor()
+
+print("--- Všechna měření ---")
+cursor.execute("SELECT * FROM mereni")
+for radek in cursor.fetchall():
+    print(radek)
+
+conn.close()
+print("\nHotovo! Soubor iot_data.sqlite přečtený (možná vytvořený prázdný)")
\ No newline at end of file
diff --git a/13_sqlite_python/iot_data.db b/13_sqlite_python/iot_data.db
new file mode 100644
index 0000000..e69de29
diff --git a/13_sqlite_python/iot_data.sqlite b/13_sqlite_python/iot_data.sqlite
new file mode 100644
index 0000000..7b026e6
Binary files /dev/null and b/13_sqlite_python/iot_data.sqlite differ
diff --git a/13_sqlite_python/poznamky.txt b/13_sqlite_python/poznamky.txt
new file mode 100644
index 0000000..33dc4fa
--- /dev/null
+++ b/13_sqlite_python/poznamky.txt
@@ -0,0 +1,6 @@
+mkdir 13_sqlite_python
+cd 13_sqlite_python
+python -m venv .venv
+.venv\Scripts\activate
+pip install pyserial
+code .
\ No newline at end of file