I2C

sunlichao

1. from machine import Pin, I2C
   
2. # construct an I2C bus
   
3. i2c = I2C(scl=Pin(5), sda=Pin(4), freq=100000)
   
4. i2c.readfrom(0x3a, 4)   # read 4 bytes from slave device with address 0x3a
   
5. i2c.writeto(0x3a, '12') # write '12' to slave device with address 0x3a
   
6. buf = bytearray(10)     # create a buffer with 10 bytes
   
7. i2c.writeto(0x3a, buf)  # write the given buffer to the slave

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