diff --git a/basics/ESP32-Pinout2.jpeg b/basics/ESP32-Pinout2.jpeg
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diff --git a/bluetooth/zs_040/README.md b/bluetooth/zs_040/README.md
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+# Blue tooth with the ZS-040 module
+
+
+
+## Resources
+- https://protosupplies.com/product/hc-05-zs-040-bluetooth-module/
+- https://docs.micropython.org/en/latest/esp32/quickref.html#uart-serial-bus
+- https://learn.adafruit.com/introducing-the-adafruit-bluefruit-le-uart-friend/command-mode-1
+- https://learn.sparkfun.com/tutorials/serial-communication/rules-of-serial
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diff --git a/bluetooth/zs_040/bluetooth_serial_echo.py b/bluetooth/zs_040/bluetooth_serial_echo.py
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+++ b/bluetooth/zs_040/bluetooth_serial_echo.py
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+"""
+This modul implements a simple serial connection to the ZS-040 and will echo out to the console
+any messages it receives. This board is a Bluetooth SPP (Serial Port Protocol) module.
+
+When powered on the device will broadcast as BT-05 by default. Default passwords are usually 1234 or 0000.
+"""
+from machine import Pin, UART
+from utime import sleep_ms
+
+BT_STATE_PIN = Pin(5,  Pin.IN)
+uart = UART(2, baudrate=38400, tx=17, rx=16, bits=8, stop=1, parity=None)
+
+
+while True:
+    if BT_STATE_PIN.value():
+        if uart.any():
+            data = uart.read(1)
+            print(data.decode('utf8'))
+        else:
+            print("No data. Sleeping")
+    else:
+        print("No Bluetooth device paired.")
+    sleep_ms(500)
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diff --git a/ir_encoder/main.py b/ir_encoder/main.py
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+++ b/ir_encoder/main.py
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+from machine import Pin
+import utime
+
+MOTOR_LEFT_DIR = True  # False if Reverse
+MOTOR_RIGHT_DIR = True  # False if Reverse
+ENCODER_LEFT_COUNT = 0
+ENCODER_RIGHT_COUNT = 0
+
+ENCODER_LEFT_PIN = Pin(4, Pin.IN)
+ENCODER_RIGHT_PIN = Pin(5, Pin.IN)
+
+
+def handle_encoder_left(pin):
+    global ENCODER_LEFT_COUNT
+    if MOTOR_LEFT_DIR:
+        ENCODER_LEFT_COUNT += 1
+    else:
+        ENCODER_LEFT_COUNT -= 1
+
+
+def handle_encoder_right(pin):
+    global ENCODER_RIGHT_COUNT
+    if MOTOR_RIGHT_DIR:
+        ENCODER_RIGHT_COUNT += 1
+    else:
+        ENCODER_RIGHT_COUNT -= 1
+
+
+def main():
+    global MOTOR_LEFT_DIR
+    ENCODER_LEFT_PIN.irq(trigger=Pin.IRQ_RISING, handler=handle_encoder_left)
+    ENCODER_RIGHT_PIN.irq(trigger=Pin.IRQ_RISING, handler=handle_encoder_right)
+
+    while True:
+        print("LEFT: {} , RIGHT: {}".format(ENCODER_LEFT_COUNT, ENCODER_RIGHT_COUNT))
+        utime.sleep(3)
+        print("LEFT: {} , RIGHT: {}".format(ENCODER_LEFT_COUNT, ENCODER_RIGHT_COUNT))
+        utime.sleep(3)
+        print("LEFT: {} , RIGHT: {}".format(ENCODER_LEFT_COUNT, ENCODER_RIGHT_COUNT))
+        utime.sleep(3)
+        print("SWITCH DIR")
+        MOTOR_LEFT_DIR = not MOTOR_LEFT_DIR
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