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GET_STATUS

CMD: 't'
DATA: none

RESPONSE:

The unit responds with a bit-map of GPIO states (1 if active, 0 if not active). The number of bytes depends of the unit model; for example, a unit with 16 GPIOs will response with four bytes of data: each one being a Hex digit (encoded in ASCII) equivalent to 4 bits.

Bit positions in the bit-map represent GPIO numbers (either GPIs or GPOs, depending of unit configuration). The least significant bit of the first byte corresponds to GPIO-1 and so on.