一 概述

斷線重連是指在計算機網絡中，當網絡連接遇到異常中斷或者斷開時，系統會自動嘗試重新建立連接，以保證網絡通信的連續性和穩定性。這是一種常見的網絡通信技術，廣泛應用于各種計算機網絡場景，包括互聯網、局域網、廣域網等。下面我們分別從含義、步驟、實現方式、重要性的方面分別展開講解。

當計算機在進行網絡通信時，可能會遇到各種意外情況導致連接中斷，比如網絡故障、設備故障、鏈路故障、網絡擁塞等。當連接中斷時，原本建立的通信鏈路將無法繼續傳遞數據，此時就需要通過斷線重連技術來重新建立連接。在斷線重連過程中，首先會檢測當前連接是否已經中斷，可以通過發送心跳包、接收心跳回應等方式來檢測連接的可用性。如果發現連接已經中斷，系統會自動觸發斷線重連操作。

斷線重連操作通常包括以下幾個步驟：1. 斷開當前連接：當檢測到連接中斷后，系統會主動斷開當前連接，釋放相關資源。2. 嘗試重新建立連接：系統會按照預先設定的規則或者策略，嘗試重新建立連接。這個過程可以包括多次嘗試，每次嘗試可能采用不同的方式或參數進行。3. 連接驗證和協商：當重新建立連接時，通常需要進行連接驗證和協商，以確保雙方的通信能力和參數兼容，避免發生通信錯誤或者數據丟失。4. 恢復數據傳輸：一旦連接成功建立，系統會恢復之前中斷的數據傳輸，保證數據的完整性和連續性。這個過程可能包括重發未確認的數據包、重建傳輸隊列等。

斷線重連技術的實現可以采用多種方式，例如在應用層、傳輸層或者網絡層實現，具體的實現方法和機制會根據不同的網絡環境和應用需求而有所差異。

斷線重連技術的重要性在于保證網絡通信的可靠性和穩定性。在大規模的網絡環境中，網絡中斷或者故障是不可避免的，但通過斷線重連技術，系統能夠快速自動地進行連接恢復，減少網絡中斷對應用和用戶的影響。

綜上，斷線重連是一種計算機網絡中常用的技術手段，用于在網絡連接中斷時自動重新建立連接。通過斷線重連技術，可以確保網絡通信的連續性和穩定性，提升用戶體驗和應用性能。

二 掉線重連組件的使用

1 Gitee鏈接地址

組件位于amaziot_bloom_os_sdklibrariesamam_net.c

Gitee源碼地址：https://gitee.com/ning./hongdou

Github源碼地址：https://github.com/ayumid/hongdou

2 應用層組件功能介紹

提供重連機制，設備掉線后，需要重新連接服務器，可以參考本組件，或者直接在組件上修改。本例調用了部分TCP組件，MQTT組件和切卡組件API。

使用該組件，必須同時使用AT組件，文件組件，TCP組件，掉線組件，掉線重連組件。

3 代碼講解

1 dtu_wait_dev_reg_net

功能：該函數用于，駐網，每隔3s查詢一次駐網情況，超過20次后，復位模組。

參數：無

返回值：無

示例：

//等待駐網
dtu_wait_dev_reg_net();

2 dtu_main_check_net_thread

功能：該函數用于，維護網絡連接，掉線后重連。

參數：

返回值：無

示例：

//創建主任務，包括網絡連接，死循環中檢查網絡連接情況，斷連后重新連接
status = OSATaskCreate(&dtu_task_ref, dtu_task_stack, DTU_TASK_STACK_SIZE, 150, "main_task", dtu_main_check_net_thread, NULL);
ASSERT(status == OS_SUCCESS);

3 dtu_checknet_task_init

功能：該函數用于，創建網絡重連任務，以及相關資源初始化。

參數：無

返回值：無

示例：

//網絡保持任務初始化
dtu_checknet_task_init();

4 Demo實戰

4.1 創建一個Demo

復制20.4_trans_xtu示例工程，到同一個文件夾下，修改文件名為20.7_netreconnect_xtu，如圖：

4.2 修改makefile

增加文件組件所在目錄頭文件路徑，和源文件路徑，如圖：

4.3 增加頭文件

使用代碼編輯器，將新建的工程文件加入代碼編輯器中，打開main.c，修改main.c，加入am.h等頭文件，如圖：

4.4 修改代碼

示例使用的是板載5x6卡，用戶的硬件可能是使用外置卡，或者是三合一全網通卡，因為硬件上三種卡使用的模組SIM卡接口不一樣（外置卡SIM1，5x6卡和三合一卡SIM2），所以，需要通過一個全局變量來制定SIM卡硬件接口。

extern外部變量SDK_INIT_SIM_SELECT_VALUE，這里判斷了是否使用外置卡，這個宏定義在Makefile里面定義。

在Phase1Inits_enter中，宏定義判斷是否要包含對SDK_INIT_SIM_SELECT_VALUE變量的修改。

在Phase2Inits_exit 調用文件組件提供的對外API，如圖：

4.5 編譯

在SDK根目錄打開命令行，輸入命令.build.bat -l .amaziot_bloom_os_sdksamplelibraries20.7_netreconnect_xtu

PS F:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08
λ .build.bat -l .amaziot_bloom_os_sdksamplelibraries20.7_netreconnect_xtu
子目錄或文件 outbin 已經存在。
命令語法不正確。
子目錄或文件 buildobj 已經存在。
gnumake: Entering directory `F:/3.asr-b/cat.1-asr1606/1.software/BLOOM_OS_1606_OPENCPU_1191_A08/amaziot_bloom_os_sdk/sample/libraries/20.7_netreconnect_xtu'
armcc.exe -c  --cpu Cortex-R4 --no_unaligned_access -g -O2 --apcs /inter --diag_suppress 2084,1,2,177,188,223,550,1296,2795,6319,9931,9933 --diag_error=warning --gnu --thumb --loose_implicit_cast  -DDATA_COLLECTOR_IMPL -DISPT_OVER_SSP -DDIAG_SSP_DOUBLE_BUFFER_USE_DYNAMIC_ALLOCATION -DENV_XSCALE -DL1_DCXO_ENABLED -DLTE_HIGH_MOBILITY_OPTIMIZATION -DRUN_XIP_MODE -DCRANE_Z2 -DCA_LONG_IPC_MSG -DNEZHA3 -DNEZHA3_1826 -DUPGRADE_PLMS -DUPGRADE_PLMS_SR -DLTE_GSMMULTIBCCH -DGPLC_LTE_RSSI_SCAN -DL1V_NEW_RSSI -DUPGRADE_PLMS_3G -DUPGRADE_PLMS_L1 -DUPGRADE_FG_PLMS -DFG_PLMS_URR -DUPGRADE_L1A_FG_PLMS -DUPGRADE_PLMS_STAGE_2 -DUPGRADE_MBCCH -DMULTI_BCCH_READY_IND -DURR_MRAT_ICS_SEARCH -DUPGRADE_ICS -DMRAT_NAS -DUPGRADE_PLMS_SEARCH_API -DICS_MBCCH -DICS_MBCCH_2G_RSSI -DDIAG_NEWPP -DPHS_SW_DEMO -DPHS_SW_DEMO_TTC -DPHS_SW_DEMO_TTC_PM -DFULL_SYSTEM -D_DDR_INIT_ -D_TAVOR_HARBELL_ -DUPGRADE_ARBEL_PLATFORM -D_TAVOR_B0_SILICON_ -DTDL1C_SPY_ENABLE -DDLM_TAVOR -DTAVOR -DFLAVOR_DUALCORE -DDEBUG_D2_MOR_REG_RESEREVED_ENABLE -D_DIAG_USE_COMMSTACK_ -D_TAVOR_DIAG_ -DPM_DEBUG_MODE_ENABLED -DPM_D2FULL_MODE -DPM_EXT_DBG_INT_ARR -DFEATURE_WB_AMR_PS -DMACRO_FOR_LWG -DHL_LWG -DOPTIMIZE_FOR_2G_BCCH -DPLAT_TEST -D_FDI_USE_OSA_ -DPLAT_USE_THREADX -DLWIP_IPNETBUF_SUPPORT -DCRANE_MCU_DONGLE -DAT_OVER_UART -DPHS_SW_DEMO_TTC_PM -DUPGRADE_LTE_ONLY -DEXT_AT_MODEM_SUPPORT -DLTEONLY_THIN_SINGLE_SIM -DLFS_FILE_SYS -DLFS_FILE_SYS_V2 -DPSM_ENABLE -DNO_PAHO_MQTT -DNO_XML -DNO_LWM2M -DREMOVE_MBEDTLS -DNO_AT_NET -DCRANE_SD_NOT_SUPPORT -DNTP -DYMODEM_EEH_DUMP -DENABLE_DM_LTEONLY -DLTEONLY_THIN -DNO_EXTEND_MY_Q_AT -DNOT_SUPPORT_HTTPS -DNOT_SUPPORT_PM813 -DCRANEL_4MRAM -DREMOVE_PB -DUART_NEW_VERSION -DREMOVE_MEP -DREMOVE_SMS -DREMOVE_ENVSIM -DAPN_INCODE -DLTEONLY_THIN_SINGLE_SIM_2MFLASH -DASR160X_OPENCPU_FEATURE -DENABLE_UART3_FEATRUE -DENABLE_UART4_FEATRUE -DYUGE_MBEDTLS_3_2_1 -DENABLE_MAC_TX_DATA_LOGGING -DDISABLE_NVRAM_ACCESS -DINTEL_UPGRADE_EE_HANDLER_SUPPORT -DLTE_W_PS -DL1_DUAL_MODE -DUPGRADE_HERMON_DUAL -DINTEL_UPGRADE_DUAL_RAT -DINTEL_UPGRADE_GPRS_CIPHER_FLUSH -DUPGRADE_ENHANCED_QUAD_BAND -DINTEL_2CHIP_PLAT -DI_2CHIP_PLAT -DUPGRDE_TAVOR_COMMUNICATION -DRUN_WIRELESS_MODEM -DFLAVOR_DDR12MB_GB1MB5 -DFEATURE_SHMEM -DACIPC_ENABLE_NEW_CALLBACK_MECHANISM -DRELIABLE_DATA -DMAP_NSS -DTV_FNAME=""SW_PLATFORM=PMD2NONE PHS_SW_DEMO PHS_SW_DEMO_PM SRCNUCLEUS FULL_SYSTEM NOACRTC PDFLT PLAT_TEST PV2 DIAGOSHMEM NVM WITHL1V"" -DTV_FDESC=""SW_DESCRIPTION="" -DENABLE_ACIPC -D_DATAOMSL_ENABLED_ -DUSB_CABLE_DETECTION_VIA_PMIC -DMIPS_TEST -DMIPS_TEST_RAM -DFLAVOR_DIET_RAM -DNVM_INCLUDE -DMSL_INCLUDE -DMSL_POOL_MEM -DNO_AUDIO -DOSA_QUEUE_NAMES -D_DIAG_DISABLE_USB_ -DOSA_NUCLEUS -DOSA_USED -DPM_D2NONE_MODE -DCRANE_SOC_TEMPERATURE_SENSOR -DL1_SW_UPDATE_FOR_DIGRF -DPHS_L1_SW_UPDATE_R7 -DUPGRADE_LTE -DFRBD_CALIB_NVM -DFRBD_AGC_CALIB -DFRBD_FDT_CALIB -DHSPA_MPR -DCAPT_PARAMS_OPTIMIZE -DL1_WB_R99_ONLY -DL1V_WB_R99_ONLY -DINTERGRATED_RF_SUPPORT -DL1_RX_DIV_SUPPORT -DENABLE_OOS_HANDLING -DTAVOR_D2_WB_L1_SUPPORT -DL1_DDR_HIGH_FREQ -DUPGRADE_DIGRF3G_SUPPORT -DW_PS_PLUS_G_PAGING -D"NO_APLP=0" -DINTEL_UPGRADE_UNIFIED_VOICE_TASK -DINTEL_UPGRADE_R99 -DAPLP_SPY_ENABLE -D__TARGET_FEATURE_DOUBLEWORD -DWHOLE_UMTS_STACK -DUSE_TTPCOM_CSR_BLUETOOTH_AUDIO_GAIN_CONTROL -DL1_UPGRADE_R5 -DUPGRADE_EDGE -DUPGRADE_R4_FS1 -DINTEL_UPGRADE_GSM_CRL_IF -DUPGRADE_EGPRS_M -DINTEL_UPGRADE_EGPRS_M -DINTEL_UPGRADE_RF_PARAMS_IN_CF_TDS -DINTEL_UPGRADE_2SAMPLES_PER_SYMBOL -D"GPRS_MULTISLOT_CLASS=12" -D"EGPRS_MULTISLOT_CLASS=12" -DMARVELL_UPGRADE_BSIC_REDESIGN -DMSL_INCLUDE -DINTEL_HERMON_SAC -DCRANE_CUST_BUILD -DL1_SW_UPDATE_FOR_DIGRF -DFLAVOR_COM -DSILICON_PV2 -DSILICON_SEAGULL -DSILICON_TTC_CORE_SEAGULL -DPCAC_INCLUDE -Otime  -DBUILD_DATE=""11 21 2023"" -DBUILD_TIME=""15:44:12"" -Iatcmdsinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhoptelephonyyugeinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhalUARTinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhalcoreinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhalPMUinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhalGPIOinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xosposixinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xdiagdiag_logicsrc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xcswSysCfginc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xcswplatforminc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xenvwin32inc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xcswBSPinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xcswplatformdev_platbuild -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xososainc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xosthreadxinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xosnu_xscaleinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcacpsminc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcachttpclientsrc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xdiagdiag_logicinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhoptimerinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhopintcinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xcswPMinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhoppminc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xsoftutilTickManagerinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhopBSPinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhoptelephonyatcmdsrvinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhoptelephonyatparserinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhoptelephonysdkinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcachttpclientinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcacciinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcaclwipv4v6srcinclude -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcaclwipv4v6srcincludearch -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcaclwipv4v6srcincludeipv4 -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcaclwipv4v6srcincludeipv6 -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcaclwipv4v6srcincludelwip -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcaclwipv4v6srcincludenetif -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhopmmi_matinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xtavorArbelinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xtavorenvinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhoptelephonymodeminc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcacdusterinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcacfotainc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhalI2Cinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhalACIPCinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xsoftutilfatsysflash -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xsoftutilFDIsrcINCLUDE -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhalMMUinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xsoftutilFDIsrcFDI_ADD -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xsoftutilFDIsrcFM_INC -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xsoftutilfatsysfshdr -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xsoftutillittlefsinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcacttsinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcacdialinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xsoftutilcsw_memoryinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhoputilitiesinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhopcommpminc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xsoftutilnvminc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xsoftutilEEhandlerinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xsoftutilEEhandlersrc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhopRTCinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhoptelephonyci_clientinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhalBT_deviceinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhalUARTinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhopmrdinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhopdmainc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xsoftutilsoftutilinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhalSPIinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcacwebsocketinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcacatnet_srvinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xsoftutilfotacomminc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xaud_swAudioinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xaud_swACM_COMMinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xaud_swaudio_stubsrc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhopaaminc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xaud_swAudioHALinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xhaldbgshellinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08includeasr160xpcacopencpuinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08amaziot_bloom_os_sdkutils -IF:/3.asr-b/cat.1-asr1606/1.software/BLOOM_OS_1606_OPENCPU_1191_A08/amaziot_bloom_os_sdk/sample/libraries/20.7_netreconnect_xtuaminc -IF:/3.asr-b/cat.1-asr1606/1.software/BLOOM_OS_1606_OPENCPU_1191_A08/amaziot_bloom_os_sdk/sample/libraries/20.7_netreconnect_xtuatcmdsinc -IF:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08/amaziot_bloom_os_sdk/librariesamxtu -DDTU_BASED_ON_TCP -DDTU_TYPE_5X6 -DDTU_UART_115200_BAUD  -o buildobj/ext_at_cmds.o F:/3.asr-b/cat.1-asr1606/1.software/BLOOM_OS_1606_OPENCPU_1191_A08/amaziot_bloom_os_sdk/sample/libraries/20.7_netreconnect_xtu/atcmds/src/ext_at_cmds.c
armlink.exe buildobj/main.o buildobj/ext_at_cmds.o buildobj/ext_at_controller.o buildobj/am_file.o buildobj/am_at.o buildobj/am_trans.o buildobj/am_socket.o buildobj/am_hb.o buildobj/am_net.o 
                -o F:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08outbinArbel_PMD2NONE_40M.axf 
                --via F:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08prebuilt_1606lArbel_PMD2NONE_targ_objliblist.txt 
                --elf 
                --scatter F:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08prebuilt_1606lCrane_DS_4M_Ram_2M_Flash_XIP_CIPSRAM_Common_SingleSIM.sct 
                --predefine="-DLTEONLY_THIN_SINGLE_SIM" --map --symbols --info sizes,totals 
                --list F:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08outbinArbel_PMD2NONE_40M.map 
                --keep init.o(Header) --keep init.o(Vectors) --diag_suppress 6312,6314,6319,6329 
                --feedback F:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08outfeedbackLinkOptLteonlyThin_SingleSim_NoSMS.txt
F:3.asr-bcat.1-asr16061.softwareBLOOM_OS_1606_OPENCPU_1191_A08toolsbuildimage_1606l.bat
SDK_PROD_TYPE   : [DM]
SDK_CUST_SKU    : [THIN_SINGLE_SIM_NO_SMS]
SDK_PS_MODE     : [LTEONLY]
SDK_CHIP_VER    : [Z2A0]
SDK_OS_TYPE     : [TX]
Platform Convertion Tools v4.01 with PS option extension
Convertion done!
|INPUT   |outbincp_1606L.bin
|MARK    |NAME    |EXEADDR .LOADADDR.LENGTH  .CPZLADDR|COMPRESS STASTIC              |
|--------|--------|--------.--------.--------.--------|------------------------------|
|This Is LteOnly 4M|
|RW_CPZ_1|DDR_RW_ |7e11c000.80066514.0000d188.80067000|0000d188->00003000
|This Is LteOnly 4M|
|RW_CPZ_2|PS_NCAH |7e388000.8007369c.00001300.8006a000|00001300->00001000
|This Is LteOnly 4M|
|RW_CPZ_3|ITCM    |7e3dac00.8007499c.0000f51c.8006b000|0000f51c->0000a000
|This Is LteOnly 4M|
|RW_CPZ_4|CODE_PS |7e1ad000.80083eb8.0002fc5c.80075000|0002fc5c->0001e000
|This Is LteOnly 4M|
|RW_CPZ_5|CODEPSB |7e1df000.800b3b14.000339bc.80093000|000339bc->0001b000
|This Is LteOnly 4M|
|RW_CPZ_6|CODEPSC |7e216000.800e74d0.000323ec.800ae000|000323ec->0001b000
|This Is LteOnly 4M|
|RW_CPZ_7|CODEPSD |7e24c000.801198bc.00028d88.800c9000|00028d88->0001a000
|This Is LteOnly 4M|
|RW_CPZ_8|CODEPSE |7e27a000.80142644.0002e310.800e3000|0002e310->0001a000
|This Is LteOnly 4M|
|RW_CPZ_9|CODEPSF |7e2ac000.80170954.0001c948.800fd000|0001c948->00011000
|This Is LteOnly 4M|
|RW_CPZ_A|CODE_PL |7e2cd000.8018d29c.0002f914.8010e000|0002f914->0001e000
|This Is LteOnly 4M|
|RW_CPZ_B|CODEPLB |7e2fd000.801bcbb0.00038d58.8012c000|00038d58->00021000
|This Is LteOnly 4M|
|RW_CPZ_C|CODEPLC |7e337000.801f5908.000268d4.8014d000|000268d4->00012000
|--------|--------|--------.--------.--------.--------|------------------------------|
|                                                     |      0x002051dc -> 0x00148000|
|                                                     |       2.020(MB) ->  1.281(MB)|
|------------------------------------------------------------------------------------|
cp_1606L.axf
cp_1606L.bin
cp_1606L.map
gnumake: Leaving directory `F:/3.asr-b/cat.1-asr1606/1.software/BLOOM_OS_1606_OPENCPU_1191_A08/amaziot_bloom_os_sdk/sample/libraries/20.7_netreconnect_xtu'
"copy NEZHAC_CP_CNR_MIFI_TX.bin to ./ "

已復制         1 個文件。

4.6 生成固件

參考入門中開發工具，生成工具。

4.7 查看現象

固件下載到模組后，通過AT串口配置服務器地址，等待設備連接服務器后，斷開關閉服務器，設備會離線，之后打開服務器。設備會重新連接。

5 總結

根據實驗現象，按照本文所述流程，可以實現串口模式切換。

本文章源自奇跡物聯開源的物聯網應用知識庫Cellular IoT Wiki，更多技術干貨歡迎關注收藏Wiki：Cellular IoT Wiki 知識庫（https://rckrv97mzx.feishu.cn/wiki/wikcnBvAC9WOkEYG5CLqGwm6PHf）

歡迎同學們走進AmazIOT知識庫的世界！

這里是為物聯網人構建的技術應用百科，以便幫助你更快更簡單的開發物聯網產品。

Cellular IoT Wiki初心：

在我們長期投身于蜂窩物聯網 ODM/OEM 解決方案的實踐過程中，一直被物聯網技術碎片化與產業資源碎片化的問題所困擾。從產品定義、芯片選型，到軟硬件研發和測試，物聯網技術的碎片化以及產業資源的碎片化，始終對團隊的產品開發交付質量和效率形成制約。為了減少因物聯網碎片化而帶來的重復開發工作，我們著手對物聯網開發中高頻應用的技術知識進行沉淀管理，并基于 Bloom OS 搭建了不同平臺的 RTOS 應用生態。后來我們發現，很多物聯網產品開發團隊都面臨著相似的困擾，于是，我們決定向全體物聯網行業開發者開放奇跡物聯內部沉淀的應用技術知識庫 Wiki，期望能為更多物聯網產品開發者減輕一些重復造輪子的負擔。

Cellular IoT Wiki沉淀的技術內容方向如下：

奇跡物聯的業務服務范圍：基于自研的NB-IoT、Cat1、Cat4等物聯網模組，為客戶物聯網ODM/OEM解決方案服務。我們的研發技術中心在石家莊，PCBA生產基地分布在深圳、石家莊、北京三個工廠，滿足不同區域&不同量產規模&不同產品開發階段的生產制造任務。跟傳統PCBA工廠最大的區別是我們只服務物聯網行業客戶。

連接我們，和10000+物聯網開發者一起 降低技術和成本門檻

讓蜂窩物聯網應用更簡單~~

哈哈你終于滑到最重要的模塊了，

千萬不！要！劃！走！忍住沖動！~

歡迎加入飛書“開源技術交流群”，隨時找到我們哦~

點擊鏈接如何加入奇跡物聯技術話題群（https://rckrv97mzx.feishu.cn/docx/Xskpd1cFQo7hu9x5EuicbsjTnTf）可以獲取加入技術話題群攻略

Hey 物聯網從業者，

你是否有了解過奇跡物聯的官方公眾號“eSIM物聯工場”呢？

這里是奇跡物聯的物聯網應用技術開源wiki主陣地，歡迎關注公眾號，不迷路～

及時獲得最新物聯網應用技術沉淀發布