Reads a single byte from the given register. In some cases, the I2C device can be read without providing a register. In such case, the functions must be called with the register value 0.

This function is equivalent to readUInt8.

(new_state, new_t, data_out) = readByte(device, state, t, stage, register, data)

device	Type: Device
state	Type: State
t	Type: Transaction
stage	Type: Stage
register	Type: Integer
data	Type: Integer

new_state	Type: State
new_t	Type: Transaction
data_out	Type: Integer