/*********************************************************************************
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* Copyright: (C) 2022 LingYun IoT System Studio
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* All rights reserved.
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*
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* Filename: packet.c
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* Description: This file is packet API functions
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*
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* Version: 1.0.0(18/04/22)
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* Author: Guo Wenxue <guowenxue@gmail.com>
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* ChangeLog: 1, Release initial version on "18/04/22 16:30:25"
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*
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********************************************************************************/
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <time.h>
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#include "packet.h"
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#include "logger.h"
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#include "ds18b20.h"
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int get_devid(char *devid, int size, int sn)
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{
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if( !devid || size<DEVID_LEN )
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{
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log_error("Invalid input arugments\n");
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return -1;
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}
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memset(devid, 0, size);
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snprintf(devid, size, "rpi#%04d", sn);
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return 0;
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}
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int get_time(struct tm *ptm)
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{
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if( !ptm )
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{
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log_error("Invalid input arugments\n");
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return -1;
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}
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time_t now = time(NULL);
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localtime_r(&now, ptm);
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return 0;
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}
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int packet_segmented_pack(pack_info_t *pack_info, char *pack_buf, int size)
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{
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char strtime[TIME_LEN] = {'\0'};
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struct tm *ptm;
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if( !pack_info || !pack_buf || size<=0 )
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{
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log_error("Invalid input arguments\n");
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return -1;
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}
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ptm = &pack_info->sample_time;
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snprintf(strtime, sizeof(strtime), "%04d-%02d-%2d %02d:%02d:%02d",
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ptm->tm_year+1900, ptm->tm_mon+1, ptm->tm_mday,
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ptm->tm_hour, ptm->tm_min, ptm->tm_sec);
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memset(pack_buf, 0, size);
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snprintf(pack_buf, size, "%s|%s|%.3f", pack_info->devid, strtime, pack_info->temper);
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return strlen(pack_buf);
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}
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int packet_json_pack(pack_info_t *pack_info, char *pack_buf, int size)
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{
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char strtime[TIME_LEN] = {'\0'};
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struct tm *ptm;
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if( !pack_info || !pack_buf || size<=0 )
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{
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log_error("Invalid input arguments\n");
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return -1;
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}
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ptm = &pack_info->sample_time;
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snprintf(strtime, sizeof(strtime), "%04d-%02d-%2d %02d:%02d:%02d",
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ptm->tm_year+1900, ptm->tm_mon+1, ptm->tm_mday,
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ptm->tm_hour, ptm->tm_min, ptm->tm_sec);
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memset(pack_buf, 0, size);
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snprintf(pack_buf, size, "{\"devid\":\"%s\", \"time\":\"%s\",\"temperature\":\"%.3f\"}",
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pack_info->devid, strtime, pack_info->temper);
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return strlen(pack_buf);
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}
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