必须向传感器的寄存器发送2给字节数据，以下代码没用。求教大神如何使用I2C一次性发送2字节数据？
万分感谢！
```
from machine import Pin, I2C
import time, ustruct, binascii
from time import sleep

i2c = I2C(0, scl=Pin(9), sda=Pin(8), freq = 400000) #Define the I2C pin and frequency

# Print out any addresses found
devices = i2c.scan()
if devices:
for d in devices:
print(hex(d))

# Attitude sensor address
as_addr = 0x50

# Attitude sensor Regaddr
as_reg_addr = 0x1a # Set I2C address
as_reg_save = 0x00 # Save configuration
as_reg_unlock = 0x69 # Unlock the module


# Main
# Send 0x88 and 0xb5 to unlock the module
data2 = b'\x88\xB5'
i2c.writeto_mem(as_addr, as_reg_unlock, data2)
sleep(0.5)

# Send 0x10 and 0x00 to change the address of the module to 0x10
data3 = b'\x10\x00'
i2c.writeto_mem(as_addr, as_reg_addr, data3)
sleep(0.5)

#Send 0x00 and 0x00 to save the config
data4 = b'\x00\x00'
i2c.writeto_mem(as_addr, as_reg_save, data4)
sleep(0.5)
```