试了一下 http get, 基本正常.
参考链接: https://www.elecrow.com/download/SIM800%20Series_AT%20Command%20Manual_V1.09.pdf
参考链接: http://m2msupport.net/m2msupport/athttpinit-initialize-http-service/
//Check the registration status
AT+CREG?//Check whether bearer 1 is open.
AT+SAPBR=2,1//Enable bearer 1
AT+SAPBR=1,1//Wait untial bearer is activated
WAIT=6//Initialize HTTP service
AT+HTTPINIT//Set the HTTP URL
AT+HTTPPARA="URL","http://www.m2msupport.net/m2msupport/http_get_test.php"//Set the context ID
AT+HTTPPARA="CID",1//Set up the HTTP action
AT+HTTPACTION=0//Do a HTTP read
AT+HTTPREAD//Wait for the HTTP response
WAIT=6//Terminate the HTTP service
AT+HTTPTERM
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