一文教會(huì)你嵌入式網(wǎng)絡(luò)模塊的聯(lián)網(wǎng)操作

時(shí)間：2020-09-07 21:43:44

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[導(dǎo)讀]今天介紹一下我使用過(guò)的一款2G網(wǎng)絡(luò)模塊，在車載行駛中使用，在很惡劣的情況下，依舊可以保證網(wǎng)絡(luò)快速鏈接。因?yàn)楝F(xiàn)在的網(wǎng)絡(luò)模塊都是差不多的，尤其是IOT、LORA以及2G 3G 4G這些通過(guò)基站進(jìn)行組網(wǎng)的模塊。

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作者：良知猶存

轉(zhuǎn)載授權(quán)以及圍觀：歡迎添加微信公眾號(hào)：Conscience_Remains

總述

????現(xiàn)在物聯(lián)網(wǎng)的概念越來(lái)越突出，軟件云端小米IOT平臺(tái)、阿里物聯(lián)網(wǎng)云等等，嵌入式百度手環(huán)開(kāi)源很久了，此外網(wǎng)上關(guān)于ESP8266接入網(wǎng)關(guān)進(jìn)行遠(yuǎn)程控制的源碼不計(jì)其數(shù)。

? ?物聯(lián)網(wǎng)嵌入式端開(kāi)發(fā)使用中都是各大主流網(wǎng)絡(luò)模塊，其中無(wú)線方式通信方式區(qū)分的話，主要分為兩類：一類是Zigbee、WiFi、藍(lán)牙、Z－wave等短距離通信技術(shù)；另一類是LPWAN（low－powerWide－AreaNetwork，低功耗廣域網(wǎng)），即廣域網(wǎng)通信技術(shù)。

? ?至于幾種通信模塊使用的技術(shù)區(qū)別，改天可以寫(xiě)一篇文章進(jìn)行詳細(xì)介紹。不過(guò) 今天我來(lái)介紹一下，我使用過(guò)的一款2G網(wǎng)絡(luò)模塊，在車載行駛中使用，在很惡劣的情況下，依舊可以保證網(wǎng)絡(luò)快速鏈接。因?yàn)楝F(xiàn)在的網(wǎng)絡(luò)模塊都是差不多的，尤其是IOT、LORA以及2G 3G 4G這些通過(guò)基站進(jìn)行組網(wǎng)的模塊。

有興趣的朋友可以看看百度手環(huán)的開(kāi)源資料，后臺(tái)回復(fù) find me?加我好友進(jìn)行分享。

一、概念介紹

2G：第二代移動(dòng)通信技術(shù)加入更多的多址技術(shù)，包括TDMA和CDMA，同時(shí)2G是數(shù)字通信，因此在抗干擾能力上大大增強(qiáng)。第二代移動(dòng)通信可以說(shuō)對(duì)接下來(lái)的3G和4G奠定了基礎(chǔ)，比如分組域的引入，和對(duì)空中接口的兼容性改造，使得手機(jī)不再只有語(yǔ)音、短信這樣單一的業(yè)務(wù)，還可以更有效率的連入互聯(lián)網(wǎng)（電路域也可以提供internet業(yè)務(wù)，只是相對(duì)來(lái)說(shuō)分組域更適合internet業(yè)務(wù)）。2G主要的制式也是兩個(gè)，分別是來(lái)自歐洲ETSI組織的GSM（GPRS/EDGE）和來(lái)自美洲以高通公司為主力的TIA組織的CDMA IS95/CDMA2000 1x。

百科

????看到這里大家就有疑問(wèn)了，上面巴拉巴拉一堆介紹中，2G網(wǎng)絡(luò)看上去都是很落后的了，畢竟現(xiàn)在5G都出了。2G都沒(méi)人用了，有什么好講的。那我這里就給2G正個(gè)名。

????現(xiàn)在網(wǎng)絡(luò)通信技術(shù)發(fā)展的很快，手機(jī)等終端對(duì)最新通信技術(shù)的支持也是很及時(shí)，但是也是在手機(jī)這塊。要知道手機(jī)現(xiàn)在的售價(jià)是很高的，在長(zhǎng)時(shí)間的快速更新?lián)Q代中，消費(fèi)者也逐漸接受了這些技術(shù)指標(biāo)以及消費(fèi)價(jià)格。但是在一些工業(yè)領(lǐng)域，物聯(lián)網(wǎng)產(chǎn)品中，只要很小的帶寬，網(wǎng)絡(luò)覆蓋率廣，流量費(fèi)用足夠低，甚至需要低功耗的模塊。IOT LORA就是現(xiàn)在物聯(lián)網(wǎng)選擇比較多的模塊，但是IOT依舊也有自己的缺點(diǎn)。

????“NB-IOT實(shí)際使用沒(méi)有理論宣傳那么好，NB-IOT，功耗低、傳輸距離遠(yuǎn)、系統(tǒng)容量大，這些都是耳熟能詳?shù)暮锰幜?。但是，功耗低：在大部分?chǎng)景下，NB并不比2G功耗低多少;傳輸距離遠(yuǎn)：現(xiàn)在2G網(wǎng)絡(luò)全覆蓋，NB-IOT還在鋪網(wǎng)階段，體現(xiàn)不出來(lái)優(yōu)勢(shì);系統(tǒng)容量大：當(dāng)前物聯(lián)網(wǎng)產(chǎn)品遠(yuǎn)遠(yuǎn)沒(méi)有把2G網(wǎng)絡(luò)占滿，更體現(xiàn)不出來(lái)NB能容納更多設(shè)備的優(yōu)勢(shì)了。價(jià)格貴：NB-IOT模塊比2G模塊貴3-4倍，算上運(yùn)營(yíng)商補(bǔ)貼還是要貴不少?！?/p>

????而2G由于通信模塊成本較低，不到4G模塊的三分之一。市面上的共享單車定位和開(kāi)鎖、POS刷卡支付也采用2G網(wǎng)絡(luò)連接。所以2G網(wǎng)絡(luò)現(xiàn)階段應(yīng)用還是比較廣的，所以我們之前也是采用了2G網(wǎng)絡(luò)模塊進(jìn)行的開(kāi)發(fā)。

二、模塊情況

????2G模塊比較有名就是上海移遠(yuǎn)公司的M26模塊，出來(lái)時(shí)間比較長(zhǎng)了，但是M26只有GPRS的功能。

所以我們選擇了中移的M6313模塊GPRS和GNSS二合一模塊。相關(guān)的資料現(xiàn)在也是很多了，一般我們用到是AT命令使用手冊(cè)，通信流程示例手冊(cè)。通信手冊(cè)我開(kāi)發(fā)的時(shí)候還沒(méi)有，現(xiàn)在中移出了，挺開(kāi)心的，又解決了開(kāi)發(fā)者的一些難題。

首先我們開(kāi)發(fā)使用是也是云，嵌入式端沒(méi)有使用現(xiàn)在比較火的MQTT或者CoAP這些協(xié)議，而是直接使用TCP進(jìn)行端口鏈接到服務(wù)器。

因?yàn)镸6313模塊的功能和M26很像，所以這個(gè)TCP鏈接過(guò)程是可以沿用的。

三、聯(lián)網(wǎng)狀態(tài)機(jī)分析

?下面是當(dāng)初開(kāi)發(fā)時(shí)候的寫(xiě)一個(gè)聯(lián)網(wǎng)狀態(tài)機(jī)，最后基本達(dá)到在CSQ在12~24時(shí)候，聯(lián)網(wǎng)時(shí)候可以最快達(dá)到4~5秒。

這個(gè)狀態(tài)機(jī)可以實(shí)現(xiàn)聯(lián)網(wǎng)，設(shè)置模塊自動(dòng)心跳、切換IP等功能。具體的解釋也都在代碼里面展示了。

static void TCP_Conncect(const char* ipaddr, const char* ipport){ char* p = NULL; p = (char*) malloc(100); if(NULL == p) { LOG("malloc p error!\r\n"); } else { memset(p, 0, 100); sprintf(p, "AT+QIOPEN=\"TCP\",\"%s\",%s",ipaddr, ipport); mdm_send_cmd_noack((u8*)p); LOG("%s\r\n", p); //DEBUG } free(p); }/* ****************************************************************** * @brief 進(jìn)行IP修改時(shí)候IP正確性標(biāo)志清零 * @author Conqueror(征服者) * @version V1.0 * @date 2019-6-10 *******************************************************************/ u8 IsIPvalid = 0;static void ChangeIP(void){ IsIPvalid = 0; dprintf("Clear IsIPvalid!\r\n");}/* ****************************************************************** * @brief timer.c進(jìn)行調(diào)用此函數(shù)進(jìn)行判斷IP是否正常通訊 * @author Conqueror(征服者) * @version V1.0 * @date 2019-6-17 *******************************************************************/ TimTypeDef SecIPTimeManage;void SecIPManageTimer(void){ if(SecIPTimeManage.stat == TON) { (SecIPTimeManage.cunt < SecIPTimeManage.des)?(SecIPTimeManage.cunt++):\ (TimerManageInit(&SecIPTimeManage,TOFF,0),IsIPvalid=0); } }/* ****************************************************************** * @brief IP為正確可用的，可以進(jìn)行寫(xiě)進(jìn)FLASH * @author Conqueror(征服者) * @version V1.0 * @date 2019-6-17 *******************************************************************/ void IPValid(void){ if(devParam.secondTcp.addr[0] !=0) { IsIPvalid=1; TimerManageInit(&SecIPTimeManage,TOFF,0); LOG("IP Valid !\r\n"); }}/* ****************************************************************** * @brief 用于第一次連接新的IP地址的時(shí)候進(jìn)行發(fā)送測(cè)試 * @author Conqueror(征服者) * @version V1.0 * @date 2019-6-17 *******************************************************************/ static void TestTCP(void){ if(cntMdm == 1 && devParam.secondTcp.addr[0] !=0) { M6313SendTestData();/*確認(rèn)IP情況*/ TimerManageInit(&SecIPTimeManage,TON,2000);/*20s判斷*/ }}/* ****************************************************************** * @brief 判斷IP是否正確，不正確直接清零 * @author Conqueror(征服者) * @version V1.0 * @date 2019-6-17 *******************************************************************/ void IsTCPIPVaild(void){ if(gCnt.mdmTotalErr > 3&&mdmInfo.signalIntensity > 10) { memset(&devParam.secondTcp,0x00,sizeof(devParam.secondTcp));/*只要新的進(jìn)入則清除之前的數(shù)據(jù)*/ } if(IsIPvalid == 0 && SecIPTimeManage.stat == TOFF && cntMdm==1\ && econdTcp.addr[0] !=0) { LOG("IPInvalid !\r\n"); mdmFSMPWRRSTInit(); /*斷電重啟*/  memset(&devParam.secondTcp,0x00,sizeof(devParam.secondTcp));/*只要新的進(jìn)入則清除之前的數(shù)據(jù)*/ }}
void mdmFSMPWRRSTInit(void) { MDM_STA = MDM_EXE_PWRRST_ACT; /*設(shè)置mdmComFSM狀態(tài)*/  TBoxInfoType.userInfo.bit.cntMdm = 0; /*網(wǎng)絡(luò)默認(rèn)斷開(kāi)*/  SysFlag.mdmFSMRunSta = 1; /*啟動(dòng)MDM_FSM,TCP錯(cuò)誤處理程序?qū)⒃谝欢〞r(shí)間內(nèi)不執(zhí)行*/  gtimer.mdmFSMRun = gtimer.timer; /*MDM_FSM處理,開(kāi)始時(shí)刻*/  dprintf("-mdmFSM_PWRRST_Init\r\n"); }
void STOP_MDM_FSM(void){ SysFlag.mdmFSMRunSta = 0; /*MDM_FSM強(qiáng)制結(jié)束*/ gtimer.mdmFSMRun = 0;}

void mdmComFSM(void){ static u8 iTimes = 0; /*發(fā)AT CMD次數(shù)*/ static u8 mdmPwrOnCnt = 0; /*MDM開(kāi)機(jī)次數(shù)*/
 if(MDM_STA != MDM_IDLE_STA) /*FSM運(yùn)行中,刷新*/ { refreshWorkTimer(); }  switch(MDM_STA) { case MDM_IDLE_STA:  break;/*----------------------------------------------------------------------------------------------------------------------------------------------------------------------*/  /*模塊斷電復(fù)位*/ case MDM_EXE_PWRRST_ACT: LOG("*%d<-:MDM_PWR_RST[T:%d]\r\n", MDM_EXE_PWROFF_ACT, gtimer.timer); MDM_PWR_EN_L; gtimer.mdmFSMTimerout = 0; MDM_STA = MDM_WAIT_PWRRST_RES;  break; case MDM_WAIT_PWRRST_RES: if(gtimer.mdmFSMTimerout > 2000) /*超過(guò)10秒*/ { gtimer.mdmFSMTimerout = 0; MDM_PWR_EN_H;????????LOG("MDM_PWR_EN_H!\r\n"); MDM_STA = MDM_EXE_PWRON_ACT;  LOG("MDM_PWR_RST Finish!\r\n"); }??????break;??  /*模塊關(guān)機(jī)*/  case MDM_EXE_PWROFF_ACT: /*模塊關(guān)機(jī):開(kāi)機(jī)狀態(tài)模塊的PWRKEY拉低1s關(guān)機(jī)*/ LOG("\r\n*Step:%d,MDM_EXE_PWROFF_ACT,time:%d\r\n", MDM_EXE_PWROFF_ACT, gtimer.timer); MDM_PWRKEY_EN_H; gtimer.mdmFSMTimerout = 0; MDM_STA = MDM_WAIT_PWROFF_RES;  break; case MDM_WAIT_PWROFF_RES: if(gtimer.mdmFSMTimerout > 200) /*超過(guò)1秒*/ { gtimer.mdmFSMTimerout = 0; MDM_PWRKEY_EN_L; /*m6313的PWRKEY處產(chǎn)生高電平*/  MDM_STA = MDM_WAIT_PWROFF_DELAY; LOG("MDM_PWRKEY_EN_L,PWROFF_time:%d\r\n", gtimer.timer); } break;  case MDM_WAIT_PWROFF_DELAY: if(gtimer.mdmFSMTimerout > 2400) /*12秒等待,模塊關(guān)機(jī)完成*/ { LOG("MDM_POWER_OFF finish\r\n"); MDM_STA = MDM_EXE_PWRON_ACT;  }  break;  /*模塊開(kāi)機(jī)*/  case MDM_EXE_PWRON_ACT: /*模塊開(kāi)機(jī):在關(guān)機(jī)狀態(tài)模塊的PWRKEY拉低2s開(kāi)機(jī)*/ LOG("\r\n*Step:%d,MDM_EXE_PWRON_ACT,time:%d\r\n", MDM_EXE_PWRON_ACT,gtimer.timer); M6313ComInit(); MDM_PWRKEY_EN_H; gtimer.mdmFSMTimerout = 0; MDM_STA = MDM_WAIT_PWRON_RES;  break; case MDM_WAIT_PWRON_RES: if(gtimer.mdmFSMTimerout > 400) /*超過(guò)2秒*/ { MDM_PWRKEY_EN_L; /*PWRKEY開(kāi)機(jī)流程結(jié)束*/ mdmPwrOnCnt++; LOG("MDM_POWER_ON,,time:%d\r\n", gtimer.timer);  MDM_STA = MDM_TX_AT_CMD;  }  break;  /*檢查MDM通信*/  case MDM_TX_AT_CMD:  LOG("\r\n*Step:%d,AT\r\n", MDM_TX_AT_CMD);//step 1 LOG("AT-%d-\r\n", iTimes);??????mdm_send_cmd_noack((u8*)"AT");
 iTimes++;  gtimer.mdmFSMTimerout = 0; MDM_STA = MDM_WAIT_AT_RES; break; case MDM_WAIT_AT_RES: if(!mdm_check_str((u8*)"OK")) /*查詢到OK*/ {????????LOG("AT-OK-%d-\r\n",?iTimes);
 if(mdmPwrOnCnt > 0) { MDM_STA = MDM_WAIT_GSM_READY; /*模塊開(kāi)機(jī),需要一定時(shí)間,等待GSM注冊(cè)成功*/ gtimer.mdmFSMTimerout = 0; }????????else{ MDM_STA = MDM_START_INIT;  } } else if(gtimer.mdmFSMTimerout > 400) /*本次等待2秒超時(shí)*/ { if(iTimes < EXE_AT_TIMES)  { MDM_STA = MDM_TX_AT_CMD; /*繼續(xù)發(fā)送AT*/ LOG("continue-%d- send\"AT\"\r\n", iTimes); } else /*iTimes超過(guò)次數(shù)*/ {  iTimes = 0; LOG("AT error,%d times\r\n", EXE_AT_TIMES);  if(mdmPwrOnCnt < EXE_MDM_PWRON_TIMES) { MDM_STA = MDM_EXE_PWRON_ACT; //進(jìn)入開(kāi)機(jī)流程 LOG(".MDM_EXE_PWRON_ACT\r\n"); } else { mdmPwrOnCnt = 0; /*開(kāi)機(jī)次數(shù)清零*/ MDM_STA = MDM_IDLE_STA; STOP_MDM_FSM(); /*MDM_FSM結(jié)束*/  gCnt.mdmTotalErr++; LOG("send \"AT\" %d times error,mdmTotalErr++\r\n", EXE_AT_TIMES); } } }  break;
  case MDM_WAIT_GSM_READY: /*等待GSM網(wǎng)絡(luò)注冊(cè)成功*/ if(!mdmWaitGSMReady()) { MDM_STA = MDM_START_INIT; /*GSM注冊(cè)成功*/ LOG("MDM_GSM_READY\r\n"); } else if(gtimer.mdmFSMTimerout > WAIT_GSM_READY_MAX_TIME)  { MDM_STA = MDM_START_INIT; /*GSM注冊(cè)失敗*/ LOG("MDM_GSM_NO_READY\r\n"); } break;   /*MDM初始化配置*/  case MDM_START_INIT: /*開(kāi)始初始化*/ LOG("\r\n*Step:%d,MDM_START_INIT\r\n", MDM_START_INIT); MDM_STA = MDM_TX_ATQINDI_CMD; break;
 #if 1 //190115  case MDM_TX_ATQINDI_CMD://AT+QINDI配置是否緩存接收到的數(shù)據(jù)  LOG("*%d<-:AT+QINDI=2[%d]\r\n", MDM_TX_ATQINDI_CMD, iTimes); mdm_send_cmd_noack((u8*)"AT+QINDI=2"); //0-不緩存 2-緩存模式  iTimes++; MDM_STA = MDM_WAIT_ATQINDI_RES; gtimer.mdmFSMTimerout = 0; break; case MDM_WAIT_ATQINDI_RES: if(!mdm_check_result((u8*)"OK")) { MDM_STA = MDM_TX_ATCMVERSION_CMD;  LOG("->:OK[%d]\r\n", iTimes);  gCnt.fsmErrCnt = 0; } else if(!mdm_check_result((u8*)"ERROR")) { MDM_STA = MDM_TX_ATCMVERSION_CMD;  LOG("->:ERROR[%d]\r\n", iTimes);  gCnt.fsmErrCnt = 0; if(iTimes < 3) //190220 { MDM_STA = MDM_TX_ATQINDI_CMD;  } else { iTimes = 0; MDM_STA = MDM_TX_ATCMVERSION_CMD;  LOG("AT+QINDI=2,error 3 times!\r\n");  gCnt.fsmErrCnt++;  } } else if(gtimer.mdmFSMTimerout > 400) { if(iTimes < 3)  { MDM_STA = MDM_TX_ATQINDI_CMD;  } else { iTimes = 0; MDM_STA = MDM_TX_ATCMVERSION_CMD;  LOG("AT+QINDI=2,error 3 times!\r\n");  gCnt.fsmErrCnt++;  } } break; #endif    /*查版本*/ case MDM_TX_ATCMVERSION_CMD:  LOG("*<-%d:AT+CMVERSION\r\n", MDM_TX_ATCMVERSION_CMD);  memset(USART1_RX_BUF, 0, sizeof(USART1_RX_BUF));  mdm_send_cmd_noack((u8*)"AT+CMVERSION"); MDM_STA = MDM_WAIT_ATCMVERSION_RES; gtimer.mdmFSMTimerout = 0; break; case MDM_WAIT_ATCMVERSION_RES:  if(!mdm_check_str((u8*)"M6313")) {  char* p = strstr((const char*)USART1_RX_BUF, (const char*)"M6313"); /*USART1_RX_STA被mdm_check_str清0了*/ if(NULL != p)//格式:M6313-MBRH0S02-release-EXT-20181025 { char* p1 = NULL;  p1 = strchr((const char*)USART1_RX_BUF, '-'); /*第一個(gè)'-'內(nèi)容*/ if(NULL !=p1) {  strncpy(mdmInfo.MDMSoftInfo, p1+1, 8); /*取"MBRH0S02"*/  }  char* p2 = NULL; p2 = strrchr((const char*)USART1_RX_BUF, '-'); /*最后一個(gè)'-'內(nèi)容*/ if((NULL!=p2) && (p2!=p1)) { strncpy(&mdmInfo.MDMSoftInfo[8], p2+3, 6);/*取"181025"*/ } mdmInfo.MDMSoftInfo[14] = '\0'; p1 = NULL;  p2 = NULL;  LOG("Copy...\r\n");  } else { LOG("Copy error!\r\n"); }  p = NULL;
????????MDM_STA?=?MDM_TX_ATQITKA_CMD;????????? LOG("->:M6313...\r\n");  } else if(gtimer.mdmFSMTimerout > 200) {
????????MDM_STA?=?MDM_TX_ATQITKA_CMD;??????? LOG("Fault\r\n");  } break;   /*TCP自動(dòng)心跳 AT+QITKA=< keepalive >[,][,][,< keepcount>]*/ //MDM_AUTO_TICK_EN  case MDM_TX_ATQITKA_CMD:  LOG("*<-%d:AT+QITKA=1,60,300,3\r\n", MDM_TX_ATQITKA_CMD);  mdm_send_cmd_noack((u8*)"AT+QITKA=1,60,300,3");  MDM_STA = MDM_WAIT_ATQITKA_RES; gtimer.mdmFSMTimerout = 0; break; case MDM_WAIT_ATQITKA_RES:  if(!mdm_check_str((u8*)"OK")) { MDM_STA = MDM_TX_ATQSCLK_CMD; LOG("->:OK\r\n");  } else if(gtimer.mdmFSMTimerout > 200) { MDM_STA = MDM_TX_ATQSCLK_CMD; LOG("Fault\r\n");  } break; /*設(shè)置慢時(shí)鐘*/ case MDM_TX_ATQSCLK_CMD: /*慢時(shí)鐘*/  LOG("\r\n*Step:%d,AT+QSCLK\r\n", MDM_TX_ATQSCLK_CMD);??????mdm_send_cmd_noack((u8*)"AT+QSCLK=1");?/*開(kāi)啟慢時(shí)鐘*///修改?lyn?2018.10.6
 MDM_STA = MDM_WAIT_ATQSCLK_RES; gtimer.mdmFSMTimerout = 0; break; case MDM_WAIT_ATQSCLK_RES: if(!mdm_check_str((u8*)"OK"))  { MDM_STA = MDM_TX1_ATGSN_CMD;????????LOG("AT+QSCLK=1?ok\r\n"); } else if(gtimer.mdmFSMTimerout > 200) /*1s超時(shí)*/ { MDM_STA = MDM_TX1_ATGSN_CMD;????????LOG("AT+QSCLK=1?error\r\n"); } break; ????? /*第1次讀取IMEI*/ case MDM_TX1_ATGSN_CMD:  LOG("\r\n*Step:%d,read IMEI\r\n", MDM_TX1_ATGSN_CMD); mdm_send_cmd_noack((u8*)"AT+GSN"); /*讀取IMEI*/ MDM_STA = MDM_WAIT1_ATGSN_RES; gtimer.mdmFSMTimerout = 0;  break; case MDM_WAIT1_ATGSN_RES:/*讀取IMEI*/ if(!mdm_check_str((u8*)"OK")) /*查詢到OK*/ { Str2BCD(USART1_RX_BUF, (u8*)temp1IMEI); MDM_STA = MDM_TX2_ATGSN_CMD; /*第2次讀取IMEI*/ LOG("-1-get IMEI ok\r\n"); } else if(gtimer.mdmFSMTimerout > 400) /*2s超時(shí)*/ { MDM_STA = MDM_TX_ATCIMI_CMD; LOG("-1-get IMEI error\r\n"); }  break;   /*第2次讀取IMEI*/ case MDM_TX2_ATGSN_CMD:  LOG("\r\n*Step:%d,read IMEI\r\n", MDM_TX2_ATGSN_CMD); mdm_send_cmd_noack((u8*)"AT+GSN"); /*讀取IMEI*/ MDM_STA = MDM_WAIT2_ATGSN_RES; gtimer.mdmFSMTimerout = 0;  break; case MDM_WAIT2_ATGSN_RES:/*讀取IMEI*/ if(!mdm_check_str((u8*)"OK")) /*查詢到OK*/ { Str2BCD(USART1_RX_BUF, (u8*)temp2IMEI);  MDM_STA = MDM_TX_ATCIMI_CMD; LOG("-2-get IMEI ok\r\n"); if(memcmp(&temp1IMEI[0], &temp2IMEI[0], sizeof(temp2IMEI)) == 0) /*兩次結(jié)果相等*/ { LOG("read 2 times same IMEI\r\n"); LOG("IMEI1:\r\n"); printfHex(temp1IMEI,sizeof(temp1IMEI)); LOG("IMEI2:\r\n"); printfHex(temp2IMEI,sizeof(temp2IMEI)); if(memcmp(&deviceInfo.deviceIMEI[0], &temp2IMEI[0], sizeof(temp2IMEI)) != 0)/*和舊IMEI比較*/ { memcpy(&deviceInfo.deviceIMEI[0], &temp2IMEI[0], sizeof(temp2IMEI)); writeFlash(); //保存參數(shù) LOG("updata IMEI ok\r\n"); } else { LOG("old IMEI ok\r\n"); }  memset(temp1IMEI, 0x00, sizeof(temp1IMEI)); memset(temp2IMEI, 0x00, sizeof(temp2IMEI));  } else { LOG("read 2 times different IMEI\r\n"); }  } else if(gtimer.mdmFSMTimerout > 400) /*2s超時(shí)*/ { MDM_STA = MDM_TX_ATCIMI_CMD; LOG("-2-get IMEI error\r\n"); }  break;  /*讀取IMSI*/  case MDM_TX_ATCIMI_CMD: /*讀取IMSI*/ LOG("\r\n*Step:%d,read IMSI\r\n", MDM_TX_ATCIMI_CMD); mdm_send_cmd_noack((u8*)"AT+CIMI");  MDM_STA = MDM_WAIT_ATCIMI_RES; gtimer.mdmFSMTimerout = 0;  break; case MDM_WAIT_ATCIMI_RES: if(!mdm_check_str((u8*)"OK")) /*查詢到OK*/ { char tmpIMSI[8]; Str2BCD(USART1_RX_BUF, (u8*)tmpIMSI); /*TBoxInfoType.deviceInfo.deviceIMSI*/ MDM_STA = MDM_GPRS_INTI; LOG("get IMSI:\r\n"); printfHex(tmpIMSI,sizeof(tmpIMSI)); if(memcmp(&TBoxInfoType.deviceInfo.deviceIMSI[0], &tmpIMSI[0], sizeof(tmpIMSI)) != 0)/*和舊數(shù)據(jù)比較*/ { memcpy(&TBoxInfoType.deviceInfo.deviceIMSI[0], &tmpIMSI[0], sizeof(tmpIMSI)); writeFlash(); //保存參數(shù) LOG("updata IMSI ok\r\n"); } else { LOG("old IMSI ok\r\n"); } memset(tmpIMSI, 0x00, sizeof(tmpIMSI)); } else if(gtimer.mdmFSMTimerout > 400) /*2s超時(shí)*/ { MDM_STA = MDM_GPRS_INTI; LOG("get IMSI error\r\n"); }  break;    /*GPRS配置*/ case MDM_GPRS_INTI: LOG("\r\n*Step:%d,MDM_GPRS_INTI\r\n", MDM_GPRS_INTI); MDM_STA = MDM_TX_ATE_CMD; break;  case MDM_TX_ATE_CMD:/*開(kāi)關(guān)回顯*/ LOG("\r\n*Step:%d,%s\r\n", MDM_TX_ATE_CMD, ATEx); mdm_send_cmd_noack((u8*)ATEx); /*開(kāi)關(guān)回顯*/ MDM_STA = MDM_WAIT_ATE_RES; gtimer.mdmFSMTimerout = 0;  break; case MDM_WAIT_ATE_RES: if(!mdm_check_str((u8*)"OK"))  { MDM_STA = MDM_TX_ATCPIN_CMD; LOG("%s ok\r\n", ATEx); } else if(gtimer.mdmFSMTimerout > 200) /*1s超時(shí)*/ { MDM_STA = MDM_TX_ATCPIN_CMD; LOG("ATEx error\r\n"); }  break;   case MDM_TX_ATCPIN_CMD: /*非阻塞式,最大等待時(shí)長(zhǎng)5s*/ LOG("\r\n*Step:%d,AT+CPIN?\r\n", MDM_TX_ATCPIN_CMD); mdm_send_cmd_noack((u8*)"AT+CPIN?"); MDM_STA = MDM_WAIT_ATCPIN_RES; gtimer.mdmFSMTimerout = 0;  break; case MDM_WAIT_ATCPIN_RES: if(!mdm_check_str((u8*)"READY")) /*查詢*/ { MDM_STA = MDM_TX_ATCCID_CMD; LOG("AT+CPIN? ok\r\n"); } else if(gtimer.mdmFSMTimerout > WAIT_ATCPIN_MAX_TIME) /*超時(shí),最大5s*/ { MDM_STA = MDM_TX_ATCCID_CMD; /*next*/ gCnt.mdmTotalErr++; SIM_Handler();/*SIM卡故障*/ LOG("AT+CPIN? error\r\n"); }  break;   case MDM_TX_ATCCID_CMD: /*查詢SIM卡CCID*/ LOG("\r\n*Step:%d,read CCID\r\n", MDM_TX_ATCCID_CMD); mdm_send_cmd_noack((u8*)"AT+CCID"); MDM_STA = MDM_WAIT_ATCCID_RES; gtimer.mdmFSMTimerout = 0;  break;  case MDM_WAIT_ATCCID_RES: if(!mdm_check_str((u8*)"+CCID:")) /*查詢*/ { char* tempCCID = NULL; u8 ccidSize = 21;  tempCCID = (char*)malloc(sizeof(char)*ccidSize);  memset(tempCCID, 0x00, ccidSize);  memcpy(tempCCID, &USART1_RX_BUF[10], ccidSize);//保存CCID tempCCID[20] = '\0'; /*添加結(jié)束符*/  LOG("tmpCCID:%s\r\n", tempCCID);  if(strstr((const char*)tempCCID, (const char*)"OK")== NULL) //無(wú)OK { if(strstr((const char*)tempCCID, (const char*)"\r\n")== NULL) //無(wú)回車換行  { memcpy(m6313Debug.ccid, tempCCID, ccidSize);//更新CCID m6313Debug.ccid[20] = '\0'; /*添加結(jié)束符*/ LOG("newCCID:%s\r\n", m6313Debug.ccid);  } else { LOG("error\"OK\","); LOG("old CCID:%s\r\n", m6313Debug.ccid);  } } else { LOG("error\"0x0A,0x0D\"\r\n"); LOG("old CCID:%s\r\n", m6313Debug.ccid);  }  free(tempCCID);  MDM_STA = MDM_TX_ATCREG_CMD;  } else if(gtimer.mdmFSMTimerout > WAIT_ATCCID_MAX_TIME) /*超時(shí),5s*/ { MDM_STA = MDM_TX_ATCREG_CMD; LOG("CCID get timeout! "); LOG("old CCID:%s\r\n", m6313Debug.ccid); }  break; case MDM_TX_ATCREG_CMD: /*查詢2G網(wǎng)絡(luò)是否注冊(cè)*/ LOG("\r\n*Step:%d,AT+CREG?\r\n", MDM_TX_ATCREG_CMD); mdm_send_cmd_noack((u8*)"AT+CREG?"); MDM_STA = MDM_WAIT_ATCREG_RES; gtimer.mdmFSMTimerout = 0;  break; case MDM_WAIT_ATCREG_RES: if(!mdm_check_str((u8*)",1")) /*查詢,已注冊(cè)*/ {  MDM_STA = MDM_TX_ATCSQ_CMD; LOG("AT+CREG? ok:1\r\n"); } else if(!mdm_check_str((u8*)",5")) /*查詢,漫游*/ {  MDM_STA = MDM_TX_ATCSQ_CMD; LOG("AT+CREG? ok:5\r\n"); } else if(gtimer.mdmFSMTimerout > WAIT_ATCREG_MAX_TIME) /*超時(shí),3s*/ { USART1_RX_STA=0; MDM_STA = MDM_TX_ATCSQ_CMD; /*進(jìn)入下一步*/ LOG("AT+CREG? error\r\n"); }  break;   case MDM_TX_ATCSQ_CMD: /*查詢當(dāng)前信號(hào)質(zhì)量*/ LOG("\r\n*Step:%d,AT+CSQ\r\n", MDM_TX_ATCSQ_CMD); mdm_send_cmd_noack((u8*)"AT+CSQ"); MDM_STA = MDM_WAIT_ATCSQ_RES; gtimer.mdmFSMTimerout = 0;  break; case MDM_WAIT_ATCSQ_RES: if(!mdm_check_str((u8*)"OK")) /*查詢*/ { u8 len;????????mdmInfo.signalIntensity?=?NMEA_Str2num(&USART1_RX_BUF[8],&len);?/*得到MDM的CSQ*/????????????????

 MDM_STA = MDM_TX_ATQICLOSE_CMD; LOG("MDM_CSQ=%d\r\n", mdmInfo.signalIntensity); } else if(gtimer.mdmFSMTimerout > 200) /*1s超時(shí)*/??????{
 MDM_STA = MDM_TX_ATQICLOSE_CMD; LOG("get CSQ error.\r\n"); }  break;   /*AT+QICLOSE關(guān)閉TCPUDP連接*/  case MDM_TX_ATQICLOSE_CMD: /*關(guān)閉PDP使用場(chǎng)景*/ LOG("\r\n*Step:%d,AT+QICLOSE\r\n", MDM_TX_ATQICLOSE_CMD); mdm_send_cmd_noack((u8*)"AT+QICLOSE"); MDM_STA = MDM_WAIT_ATQICLOSE_RES; gtimer.mdmFSMTimerout = 0;  break; case MDM_WAIT_ATQICLOSE_RES: if(!mdm_check_str((u8*)"ERROR")) /*關(guān)閉連接失敗*/ {  MDM_STA = MDM_TX_ATQIDEACT_CMD; /*NEXT關(guān)閉PDP*/ LOG("AT+QICLOSE ok:\"ERROR\"\r\n"); } else if(!mdm_check_str((u8*)"CLOSE OK")) /*關(guān)閉連接成功*/ {  MDM_STA = MDM_TX_ATQIDEACT_CMD; /*NEXT關(guān)閉PDP*/ LOG("AT+QICLOSE ok:\"CLOSE OK\"\r\n"); } else if(gtimer.mdmFSMTimerout > WAIT_ATQICLOSE_MAX_TIME) /*超時(shí),最大2s*/ { MDM_STA = MDM_TX_ATQIDEACT_CMD; /*NEXT關(guān)閉PDP*/ LOG("AT+QICLOSE error\r\n"); }  break;  /*AT+QIDEACT關(guān)閉PDP使用場(chǎng)景*/ case MDM_TX_ATQIDEACT_CMD:  LOG("\r\n*Step:%d,AT+QIDEACT\r\n", MDM_TX_ATQIDEACT_CMD); mdm_send_cmd_noack((u8*)"AT+QIDEACT"); MDM_STA = MDM_WAIT_ATQIDEACT_RES; gtimer.mdmFSMTimerout = 0;  break; case MDM_WAIT_ATQIDEACT_RES: if(!mdm_check_str((u8*)"ERROR")) /*查詢*/ {  MDM_STA = MDM_TX_ATQIREGAPP_CMD; LOG("AT+QIDEACT ok:\"ERROR\"\r\n"); } else if(!mdm_check_str((u8*)"DEACT OK")) /*查詢*/ {  MDM_STA = MDM_TX_ATQIREGAPP_CMD; LOG("AT+QIDEACT ok:\"DEACT OK\"\r\n"); } else if(gtimer.mdmFSMTimerout > WAIT_ATQIDEACT_MAX_TIME) /*超時(shí),最大45s*/ { MDM_STA = MDM_TX_ATQIREGAPP_CMD;  LOG("AT+QIDEACT error\r\n"); }  break;    case MDM_TX_ATQIREGAPP_CMD: /*設(shè)置GPRS的APN（配置為 SIM卡簽約對(duì)應(yīng)的APN）*/ LOG("\r\n*Step:%d,AT+QIREGAPP\r\n", MDM_TX_ATQIREGAPP_CMD); mdm_send_cmd_noack((u8*)"AT+QIREGAPP=\"CMNET\""); MDM_STA = MDM_WAIT_ATQIREGAPP_RES; gtimer.mdmFSMTimerout = 0;  break;  case MDM_WAIT_ATQIREGAPP_RES: if(!mdm_check_str((u8*)"OK")) /*查詢*/ {  MDM_STA = MDM_START_ATQIACT_CMD; LOG("AT+QIREGAPP ok\r\n"); } else if(gtimer.mdmFSMTimerout > WAIT_ATQIREGAPP_MAX_TIME) /*超時(shí),3s*/ { MDM_STA = MDM_START_ATQIACT_CMD; /*NEXT*/ LOG("AT+QIREGAPP error\r\n"); }  break;
 case MDM_START_ATQIACT_CMD: /*開(kāi)始激活PDP*/ LOG("\r\n*Step:%d,MDM_START_ATQIACT_CMD\r\n", MDM_START_ATQIACT_CMD); iTimes = 0; MDM_STA = MDM_TX_ATQIACT_CMD; break;  case MDM_TX_ATQIACT_CMD: /*激活PDP,GPRS網(wǎng)絡(luò)*/ LOG("\r\n*step:%d,AT+QIACT\r\n", MDM_TX_ATQIACT_CMD); mdm_send_cmd_noack((u8*)"AT+QIACT"); iTimes++; LOG("AT+QIACT,count-%d-!\r\n", iTimes); gtimer.mdmFSMTimerout = 0; MDM_STA = MDM_WAIT_ATQIACT_RES;  break;  case MDM_WAIT_ATQIACT_RES: if(!mdm_check_str((u8*)"OK")) /*查詢到OK*/ {  MDM_STA = MDM_START_TCP_SETUP;  LOG("AT+QIACT-OK[%d]\r\n", iTimes);  } else if(gtimer.mdmFSMTimerout > WAIT_ATQIACT_MAX_TIME) /*10秒超時(shí)*/ { if(iTimes < EXE_ATQIACT_TIMES)  { MDM_STA = MDM_TX_ATQIACT_CMD; /*繼續(xù)激活PDP*/ LOG(".AT+QIACT,Continue-%d-!\r\n", iTimes); } else /*iTimes超過(guò)次數(shù)*/ {  iTimes = 0;  MDM_STA = MDM_START_TCP_SETUP; /*NEXT*/  LOG("AT+QIACT,%d times PDP active error\r\n", EXE_ATQIACT_TIMES);  } }  break;   /*建立TCP連接*/  case MDM_START_TCP_SETUP: LOG("\r\n*Step:%d,MDM_START_TCP_SETUP\r\n", MDM_START_TCP_SETUP); MDM_STA = MDM_TX_ATQIMUX_CMD; break;   case MDM_TX_ATQIMUX_CMD: /*配置單路連接*/ LOG("\r\n*Step:%d,AT+QIMUX\r\n", MDM_TX_ATQIMUX_CMD); mdm_send_cmd_noack((u8*)"AT+QIMUX=0"); MDM_STA = MDM_WAIT_ATQIMUX_RES; gtimer.mdmFSMTimerout = 0;  break; case MDM_WAIT_ATQIMUX_RES: if(!mdm_check_str((u8*)"OK")) /*查詢*/ {  MDM_STA = MDM_TX_ATQIMODE_CMD; LOG("AT+QIMUX ok\r\n"); } else if(gtimer.mdmFSMTimerout > 200) /*超時(shí),1s*/ { MDM_STA = MDM_TX_ATQIMODE_CMD; /*NEXT*/ LOG("AT+QIMUX error\r\n"); }  break;   case MDM_TX_ATQIMODE_CMD: /*配置非透?jìng)髂Ｊ?/ LOG("\r\n*Step:%d,AT+QIMODE\r\n", MDM_TX_ATQIMODE_CMD); mdm_send_cmd_noack((u8*)"AT+QIMODE=0"); /*非透?jìng)?/ MDM_STA = MDM_WAIT_ATQIMODE_RES; gtimer.mdmFSMTimerout = 0;  break; case MDM_WAIT_ATQIMODE_RES: if(!mdm_check_str((u8*)"OK")) /*查詢*/ {  MDM_STA = MDM_TX_ATQIDNSIP_CMD; LOG("AT+QIMODE ok\r\n"); } else if(gtimer.mdmFSMTimerout > 200) /*超時(shí),1s*/ { MDM_STA = MDM_TX_ATQIDNSIP_CMD; /*NEXT*/  LOG("AT+QIMODE error\r\n"); }  break;   case MDM_TX_ATQIDNSIP_CMD: /*使用域名訪問(wèn)*/  LOG("\r\n*Step:%d,AT+QIDNSIP\r\n", MDM_TX_ATQIDNSIP_CMD); mdm_send_cmd_noack((u8*)"AT+QIDNSIP=1"); /*非透?jìng)?/ MDM_STA = MDM_WAIT_ATQIDNSIP_RES; gtimer.mdmFSMTimerout = 0;  break; case MDM_WAIT_ATQIDNSIP_RES:  if(!mdm_check_str((u8*)"OK")) /*查詢*/ {  MDM_STA = MDM_START_ATQIOPEN_CMD; /*NEXT*/ LOG("AT+QIDNSIP ok\r\n");  } else if(gtimer.mdmFSMTimerout > 400) /*超時(shí)2s*/ { MDM_STA = MDM_START_ATQIOPEN_CMD; /*NEXT*/  LOG("AT+QIDNSIP error\r\n"); }  break;   case MDM_START_ATQIOPEN_CMD: /*開(kāi)始TCP連接*/ LOG("\r\n*Step:%d,MDM_START_ATQIOPEN_CMD\r\n", MDM_START_ATQIOPEN_CMD); iTimes = 0; MDM_STA = MDM_TX_ATQIOPEN_CMD; break; case MDM_TX_ATQIOPEN_CMD: LOG("\r\n*Step:%d,AT+QIOPEN\r\n", MDM_TX_ATQIOPEN_CMD);  if(devParam.secondTcp.addr[0] !=0)/*聯(lián)網(wǎng)IP選擇*/ { TCP_Conncect(devParam.secondTcp.addr,devParam.secondTcp.port); } else{ TCP_Conncect(IPaddr,IPport);}
 iTimes++; LOG("send\"AT+QIOPEN\",count-%d-\r\n", iTimes);  MDM_STA = MDM_WAIT_ATQIOPEN_RES; gtimer.mdmFSMTimerout = 0;  break;  case MDM_WAIT_ATQIOPEN_RES: if(!mdm_check_str((u8*)"CONNECT OK")) /*查詢CONNECT*/ {  MDM_STA = MDM_WAIT_TCPSEND_CMD; /*TCP建立成功,進(jìn)入空閑狀態(tài)*/ LOG(".get\"CONNECT OK\"\r\n");  } else if(!mdm_check_str((u8*)"ALREAY CONNECT")) { MDM_STA = MDM_WAIT_TCPSEND_CMD; /*TCP建立成功,進(jìn)入空閑狀態(tài)*/ LOG(".get\"ALREAY CONNECT\"\r\n");  } else if(gtimer.mdmFSMTimerout > WAIT_ATQIOPEN_MAX_TIME) /*超時(shí),30s*/ {  LOG("count-%d-,MDM_FSM timeout!\r\n", iTimes);  if(iTimes < EXE_ATQIOPEN_TIMES)  { MDM_STA = MDM_TX_ATQIOPEN_CMD; /*繼續(xù)建立TCP*/ LOG(".continue AT+QIOPEN!\r\n"); } else /*iTimes超過(guò)次數(shù)*/ {  iTimes = 0;  MDM_STA = MDM_IDLE_STA; /*中斷*/  STOP_MDM_FSM(); /*MDM_FSM結(jié)束*/  cntMdm = 0; /*MDM連網(wǎng)失敗*/ gCnt.mdmTotalErr++; //MDM錯(cuò)誤統(tǒng)計(jì) LOG("AT+QIOPEN:%d times exe error,TCP connect fail!\r\n",EXE_ATQIOPEN_TIMES);  }  }  break; /*進(jìn)行延時(shí)發(fā)送任務(wù)*/ case MDM_WAIT_TCPSEND_CMD: MDM_STA = MDM_WAIT_TCPSEND_RES; /*TCP建立成功,進(jìn)入等待發(fā)送任務(wù)*/ LOG("MDM_FSM:TCP connect suc!\r\n"); gtimer.mdmFSMTimerout = 0;  break;  case MDM_WAIT_TCPSEND_RES: if(gtimer.mdmFSMTimerout > 400) /*等待兩秒*/ {  MDM_STA = MDM_IDLE_STA; /*TCP建立成功,進(jìn)入空閑狀態(tài)*/ MDM_NET_CONNECT_OK_HANDLE(); STOP_MDM_FSM(); /*MDM_FSM結(jié)束*/  }  break; 
 default: break; }}

?這就是我分享的2G網(wǎng)絡(luò)模塊聯(lián)網(wǎng)的過(guò)程哈，里面代碼是實(shí)踐過(guò)的，如果大家有什么更好的思路，歡迎分享交流哈。

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