/********************************************************************************
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* Copyright: (C) 2019 LingYun IoT System Studio
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* All rights reserved.
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*
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* Filename: relay.h
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* Description: This head file
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*
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* Version: 1.0.0(30/01/19)
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* Author: Guo Wenxue <guowenxue@gmail.com>
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* ChangeLog: 1, Release initial version on "30/01/19 08:49:31"
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*
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********************************************************************************/
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#ifndef _RELAY_H_
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#define _RELAY_H_
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#ifndef ON
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#define ON 1
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#define OFF 0
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#endif
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/* I/O Pin connected to PIN#40, BCM code pin number is 21 and wPi pin number is 29,
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* can check by linux command <gpio readall> on RPi */
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#define RELAY_PIN 29
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void init_relay(void);
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void turn_relay(int cmd);
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#endif /* ----- #ifndef _RELAY_H_ ----- */
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