groupreadresponse

[vlietje87]

Hallo Liebe Leute!

how do i convert the value returned from a "groupreadresponse" ?
in PYTHON.
when i use struct.unpack:

var = call(["groupreadresponse","ip:127.0.0.1","4/2/0"])
print(var) -> it's always "0"

(1 bit light switch / c = char )
Response from 3.0.1: 01
print(struct.unpack('>c',var))
struct.error: unpack requires a string argument of length 1

( 4 bit Power measure / l = float )
Response from 3.1.3: 42 15 0A 3D
print(struct.unpack('>l',var))
struct.error: unpack requires a string argument of length 4

Danke im Vorraus.
Jonas

[vlietje87]

well i did and this i how.

pipe = Popen(["groupreadresponse","ip:127.0.0.1","4/2/0"], stdout=PIPE)
value, error = pipe.communicate()
print(value)
walue = value.replace(" ","")
walue = walue[-9:-1]
var = struct.unpack('!f', walue.decode('hex'))[0]
print(var)

36.2599983215 Watt

gruss
jonas