Embedded Systems LM5p-GSM, Product Manual

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13. 'writebits' ,
14. 'writemultiplebits' ,
15. 'writeregisters' ,
16. 'writemultipleregisters' ,
17. 'reportslaveid' ,
18. 'getcoils' ,
19. 'getdiscreteinputs' ,
20. 'getinputregisters' ,
21. 'getregisters' ,
22. 'setcoils' ,
23. 'setdiscreteinputs' ,
24. 'setinputregisters' ,
25. 'setregisters' ,
26. } ,
27. -- new connecton init
28. new = function ()
29. require ( 'rpc' )
30. local mb = setmetatable ({} , { __index = mbproxy })
31.
32. mb.slaveid = 0
33. mb.rpc = rpc.client ( '127.0.0.1' , 28002 , 'mbproxy' )
34.
35. for _, fn in ipairs ( mbproxy.functions ) do
36. mb [ fn ]= function ( self, ... )
37. return mb:request ( fn, ... )
38. end
39. end
40.
41. return mb
42. end
43. }
44.
45. -- set local slave id
46. function mbproxy:setslave ( slaveid )
47. self.slaveid = slaveid
48. end
49.
50. -- send rpc request for a spefic function
51. function mbproxy:request ( fn, ... )
52. local res, err = self.rpc:request ({
53. fn = fn,
54. params ={ ... } ,
55. slaveid = self.slaveid or 0 ,
56. })
57.
58. -- request error
59. if err then
60. return nil , err