API返回码
返回码说明：
| 返回码 | 含义说明 |
|---|---|
| 0 | 正确返回 |
| -1 | 缺少基本请求参数 |
| -2 | 请求参数存在敏感信息（存在SQL的关键字） |
| -3 | 请求超时 |
| -4 | 请求参数Mac格式不正确 |
| -5 | Mac对应的设备未开放分享 |
| -6 | 无效的Mac |
| -7 | 无效的AK |
| -8 | 签名验证不通过 |
| -9 | Key对应的产品数据点未开放分享 |
| -10 | API异常返回 |
| -11 | API未开放 |
| -12 | 上报数据为空或格式不正确 |
| -13 | 产品未创建数据点 |
| -14 | 公司未创建产品 |
| -15 | AccessToken失效 |
| -16 | 无效的签名时间戳 |
| -17 | 下发指令数量超过限制 |
| -18 | 手机号已经注册 |
| -19 | 手机号未注册 |
| -20 | 用户token验证失败 |
| -21 | 设备已被绑定 |
| -22 | 用户和设备无绑定关系 |
| -23 | 用户无绑定设备 |
| -24 | 用户不属于该公司 |
| -25 | 设备已分享该用户 |
| -26 | 设备已取消分享 |
| -27 | 子设备不存在 |
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