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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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SIM800 数据表(PDF) 55 Page - SIMCom |
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SIM800 数据表(HTML) 55 Page - SIMCom |
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55 / 380 page  Smart Machine Smart Decision SIM800 Series_AT Command Manual_V1.09 55 2015-08-03 Max Response Time - Reference V.25ter Note Factory setting is AT+IPR=0（auto-bauding）. 2.2.41.1 Auto-bauding Synchronization between DTE and DCE ensure that DTE and DCE are correctly synchronized and the baud rate used by the DTE is detected by the DCE (= ME).To allow the baud rate to be synchronized, simply issue an "AT" string. This is necessary when you start up the module while auto-bauding is enabled. It is recommended to wait 3 to 5 seconds before sending the first AT character. Otherwise undefined characters might be returned. If you want to use auto-bauding and auto-answer at the same time, you can easily enable the DTE-DCE synchronization, when you activate auto-bauding first and then configure the auto-answer mode. Restrictions on auto-bauding operation The serial interface has to be operated at 8 data bits, no parity and 1 stop bit (factory setting). Only the strings "AT" or "at" can be detected when auto-bauding is enabled. AT+IPR=0 setting to auto-bauding will take effect after module resets. Unsolicited Result Codes that may be issued before the ME detects the new baud rate (by receiving the first AT Command string) will be sent at the previously detected baud rate.The Unsolicited Result Codes "RDY" and so on are not indicated when you start up the ME while auto-bauding is enabled. It is not recommended to switch to auto-bauding from a baud rate that cannot be detected by the auto-bauding mechanism (e.g. 300 baud). Responses to +IPR=0 and any commands on the same line might be corrupted. Auto-bauding and baud rate after restart The most recently detected baud rate can not be stored when module is powered down. 2.2.42 AT+HVOIC Disconnect Voice Call Only AT+HVOIC Disconnect Voice Call Only Execution Command AT+HVOIC Response Disconnect existing voice call by local TE from Command line and terminate call with existing PPP or CSD connection on. OK Parameter Saving Mode NO_SAVE Max Response Time 20s |
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