Added Mentor Sandbox and ADXL345 test code and library from https://github.com/rsxtrix/ESP32-ADXL345-MicroPython-Driver

uC/main_uC/Mentor/_Sandbox/ADXL345/adxl345.py

@@ -0,0 +1,26 @@
+from micropython import const
+from machine import Pin, SoftI2C
+
+# ADXL-345 Registers
+_DATA_FORMAT = const(0x31)
+_POWER_CTL = const(0x2D)
+_DATAX0 = const(0x32)
+
+class ADXL345:
+    def __init__(self, i2c, address=0x53):
+        self.i2c = i2c
+        self.address = address
+        self.i2c.start()
+        self.i2c.writeto(self.address, bytearray([_POWER_CTL, 0x08])) # power on
+        self.i2c.writeto(self.address, bytearray([_DATA_FORMAT, 0x08])) # full resolution mode
+        self.i2c.stop()
+
+    def read(self):
+        self.i2c.start()
+        self.i2c.writeto(self.address, bytearray([_DATAX0]))
+        data = self.i2c.readfrom(self.address, 6)
+        self.i2c.stop()
+        x = ((data[1] << 8) | data[0])
+        y = ((data[3] << 8) | data[2])
+        z = ((data[5] << 8) | data[4])
+        return (x, y, z)d

uC/main_uC/Mentor/_Sandbox/ADXL345/main.py

@@ -0,0 +1,13 @@
+from machine import Pin, SoftI2C
+from adxl345 import ADXL345
+
+# Define I2C pins
+i2c = SoftI2C(scl=Pin(15), sda=Pin(16))
+
+# Initialize ADXL345
+accel = ADXL345(i2c)
+
+# Read accelerometer data
+while True:
+    x, y, z = accel.read()
+    print("x = {}, y = {}, z = {}".format(x, y, z))