http - How can I send data to a web server and read that by sim800 or sim900?

Question

I've heard that there are two methods to do that, GET and POST and I know the differences like in GET method we send data in URL and in POST method we do that in some rules. But I don't know how to do that with sim800 or sim900 and how to configure my module.

Answer 1

首先你必须初始化 SIMCOM 模块：

初始化

1. 设置上下文类型：AT+SAPBR=3,1,"CONTYPE","GPRS"\r\n
2. 设置 APN: AT+SAPBR=3,1,"APN","YourAPN"\r\n
3. 打开承载：AT+SAPBR=1,1\r\n
4. 查询承载：AT+SAPBR=2,1\r\n
5. 开启 HTTP 功能：AT+HTTPINIT\r\n
6. 设置承载配置文件标识符：AT+HTTPPARA="CID",1\r\n
7. 设置网址：AT+HTTPPARA="URL","YourURL"\r\n
8. 在 HTTP 头中设置 Content-Type 字段：AT+HTTPPARA="CONTENT","application/json"\r\n

SIMCOM 模块初始化后，您可以 POST 或 GET：

对于 POST 请求

1. 设置要发送的 JSON 字符串：AT+HTTPDATA=StringLength,20000\r\nYourJSONString
2. HTTP POST: AT+HTTPACTION=1\r\n

对于 GET 请求

1. HTTP GET: AT+HTTPACTION=0\r\n