Emergency Light, decoding of status

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You can access any value up to 4 bytes the same way. Second argument for getbit function is bit number (starting from 0, up to 31).

You can also access bytes separately by using the code from the first example:

Code:

hex = event.datahex
bytes = {}

for i = 1, #hex, 2 do
  bytes[ #bytes + 1 ] = tonumber(hex:sub(i, i + 1), 16)
end

function getbit(value, nr)
  value = bit.rshift(value, nr)
  return bit.band(value, 1)
end

-- first byte
grp.checkupdate('32/1/1', getbit(bytes[ 1 ], 0))
grp.checkupdate('32/1/2', getbit(bytes[ 1 ], 1))
grp.checkupdate('32/1/3', getbit(bytes[ 1 ], 2))
grp.checkupdate('32/1/4', getbit(bytes[ 1 ], 3))
grp.checkupdate('32/1/5', getbit(bytes[ 1 ], 4))
grp.checkupdate('32/1/6', getbit(bytes[ 1 ], 5))
grp.checkupdate('32/1/7', getbit(bytes[ 1 ], 6))
grp.checkupdate('32/1/8', getbit(bytes[ 1 ], 7))

-- second byte
grp.checkupdate('32/2/1', getbit(bytes[ 2 ], 0))
grp.checkupdate('32/2/2', getbit(bytes[ 2 ], 1))
grp.checkupdate('32/2/3', getbit(bytes[ 2 ], 2))
grp.checkupdate('32/2/4', getbit(bytes[ 2 ], 3))
grp.checkupdate('32/2/5', getbit(bytes[ 2 ], 4))
grp.checkupdate('32/2/6', getbit(bytes[ 2 ], 5))
grp.checkupdate('32/2/7', getbit(bytes[ 2 ], 6))
grp.checkupdate('32/2/8', getbit(bytes[ 2 ], 7))