DFRobot TEL0051 Manual page 18

/ / P r o d u c t n a m e : G P S / G P R S / G S M M o d u l e V 3 . 0
/ / # P r o d u c t S K U : T E L 0 0 5 1
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/ / # V e r s i o n
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3
/ / # D e s c r i p t i o n :
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/ / # T h e s k e t c h f o r d r i v i n g t h e g p s m o d e v i a t h e A r d u i n o b o a r d
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6
/ / # S t e p s :
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/ / # 1 . T u r n t h e S 1 s w i t c h t o t h e P r o g ( r i g h t s i d e )
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/ / # 2 . T u r n t h e S 2 s w i t c h t o t h e A r d u i n o s i d e ( l e f t s i d e )
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/ / # 3 . T a k e o f f t h e G S M / G P S j u m p e r c a p s f r o m t h e U a r t s e l e c t
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/ / # 4 . U p l o a d t h e s k e t c h t o t h e A r d u i n o b o a r d
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/ / # 5 . T u r n t h e S 1 s w i t c h t o t h e c o m m ( l e f t s i d e )
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/ / # 6 . R e m o v e t h e j u m p e r s ( o l d v e r s i o n ) o r s e t t h e U A R T s e l e c t s w i t c h t o
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m i d d l e .
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/ / # 7 . R S T t h e b o a r d
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/ / # I f y o u g e t ' i n f ' v a l u e s , g o o u t d o o r s a n d w a i t u n t i l i t i s c o n n e c t e d .
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/ / # w i k i l i n k -
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h t t p : / / w w w . d f r o b o t . c o m / w i k i / i n d e x . p h p / G P S / G P R S / G S M _ M o d u l e _ V 3 . 0 _ ( S K U : T E L 0 0 5 1 )
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d o u b l e D a t a t r a n s f e r ( c h a r * d a t a _ b u f , c h a r n u m ) / / c o n v e r t t h e d a t a t o t h e f l o a t t y p e
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{
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a r r a y
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d o u b l e t e m p = 0 . 0 ;
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p o i n t
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u n s i g n e d c h a r i , j ;
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i f ( d a t a _ b u f [ 0 ] = = ' - ' )
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{
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i = 1 ;
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/ / p r o c e s s t h e d a t a a r r a y
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w h i l e ( d a t a _ b u f [ i ] ! = ' . ' )
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t e m p = t e m p * 1 0 + ( d a t a _ b u f [ i + + ] - 0 x 3 0 ) ;
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f o r ( j = 0 ; j < n u m ; j + + )
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t e m p = t e m p * 1 0 + ( d a t a _ b u f [ + + i ] - 0 x 3 0 ) ;
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/ / c o n v e r t t h e i n t t y p e t o t h e f l o a t t y p e
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f o r ( j = 0 ; j < n u m ; j + + )
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t e m p = t e m p / 1 0 ;
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/ / c o n v e r t t o t h e n e g a t i v e n u m b e
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t e m p = 0 - t e m p ;
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}
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e l s e / / f o r t h e p o s i t i v e n u m b e r
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{
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i = 0 ;
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: 0 . 1
/ / * d a t a _ b u f ：t h e d a t a
/ / t h e n u m b e r o f t h e r i g h t o f a d e c i m a l