/usr/local/sbin/i2cget: invalid option -- '-'
Usage: i2cget [-f] [-y] [-a] I2CBUS CHIP-ADDRESS [DATA-ADDRESS [MODE [LENGTH]]]
  I2CBUS is an integer or an I2C bus name
  ADDRESS is an integer (0x08 - 0x77, or 0x00 - 0x7f if -a is given)
  MODE is one of:
    b (read byte data, default)
    w (read word data)
    c (write byte/read byte)
    s (read SMBus block data)
    i (read I2C block data)
    Append p for SMBus PEC
  LENGTH is the I2C block data length (between 1 and 32, default 32)