Move the computer folder up - a bit easier to manage.

Integrate fixes found in earlier examples.

ch-13/full-version/robot/robot.py

@@ -4,7 +4,6 @@ import pio_encoder
 import busio
 import adafruit_vl53l1x
 import math
-import busio
 import adafruit_bno055
 
 uart = busio.UART(board.GP12, board.GP13, baudrate=9600)
@@ -18,6 +17,7 @@ ticks_to_mm = wheel_circumference_mm / ticks_per_revolution
 ticks_to_m = ticks_to_mm / 1000
 m_to_ticks = 1 / ticks_to_m
 wheelbase_mm = 170
+distance_sensor_from_middle = 40 # approx mm
 
 motor_A2 = pwmio.PWMOut(board.GP17, frequency=100)
 motor_A1 = pwmio.PWMOut(board.GP16, frequency=100)
@@ -36,10 +36,7 @@ i2c1 = busio.I2C(sda=board.GP2, scl=board.GP3)
 left_distance = adafruit_vl53l1x.VL53L1X(i2c0)
 right_distance = adafruit_vl53l1x.VL53L1X(i2c1)
 
-distance_sensor_from_middle = 40 # approx mm
-
 imu = adafruit_bno055.BNO055_I2C(i2c0)
-imu.mode = adafruit_bno055.NDOF_MODE # should be in chapter 12!
 
 def stop():
     motor_A1.duty_cycle = 0