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# Common problem
### 1.1 Interface call specification?
- **More developer risk control documents will be provided after formal cooperation**。
### 1.2 Who will push the version update？
- **请关注客服微信朋友圈 会告知哦 **。
### 1.3 How to test efficiently?
- You can use postman to test. Please check the API documentation for specific steps. There will be teaching under each interface. I wish you a smooth test.
### 1.4 Interface process？
Overview of calling interface steps
- 1. Get the token according to appkey and appsecret, and put it into the access token of the header.
- 2. Call the device registration interface to generate device information. Pay attention to saving the device_ ID is OK. You must save it, or you can't retrieve it. During the test, the registered equipment will cost 10 yuan, which can be given away after formal cooperation, because the registered equipment will cost IP.
- 3. Call "get device connection interface" to get the connection WCID
- 4. Call "update proxy set_proxy", otherwise the calling interface will fail, and the heartbeat needs to be sent within 24 hours. The proxy needs to be a long-term proxy of S5. Agent service provider: [fun agent]（ https://www.xiequ.cn/index.html?a0a5af08 ）, the developer needs to manage the validity of the proxy IP on the client. If it fails, it needs to switch to another proxy IP;
- 5. Next, we can call the business interface.
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