The list of all error codes returned by the API call is as follows：
| Error Code | Description |
| 0 | Normal, operation successful |
| 1 | App_id is Illegal |
| 2 | Validity check failed |
| 3 | Unknown error |
| 4 | The device requesting activation is not networked |
| 5 | App_id or secret key error |
| 6 | URL error |
| 7 | Device not activated |
| 8 | Device activation failed |
| 9 | Device activated, no need to reactivate |
| 10 | Device bound, activation failed |
| 11 | SN error, activation failed |
| 12 | Illegal operation |
| 13 | Operation is not supported |
| 100 | SSID does not meet specification |
| 101 | Illegal password |
| 102 | Wifi is not supported |
| 110 | Illegal focus range |
| 111 | Illegal focus area |
| 112 | Auto focus percentage error |
| 113 | Illegal parameters of night vision mode |
| 114 | The sensitivity of dynamic detection screen is illegal |
| 115 | The sensitivity of dynamic sound detection is illegal |
| 116 | Illegal date for dynamic detection |
| 117 | Illegal start time or end time of dynamic detection |
| 118 | Name length out of range |
| 119 | Parameter error of indicator switch |
| 120 | Illegal rotation parameter |
| 121 | Video data does not exist in the specified time period |
| 122 | he specified page number does not exist |
| 200 | Face group duplicate name |
| 201 | Illegal face group name |
| 202 | Packet capacity out of range |
| 203 | Face group ID does not exist |
| 204 | The specified face group does not exist |
| 205 | To delete face groups and faces, please delete all faces in the group first |
| 206 | The same face ID exists |
| 207 | The specified face ID does not exist |
| 208 | Beyond the capacity of face grouping |
| 209 | Face ID operation not allowed |
| 210 | Face photo is unqualified |
| 211 | Face service not started |
| 212 | Illegal face grouping description |
| 220 | SD card does not exist |
| 221 | SD card format failed for unknown reason |
| 230 | Incorrect parameters for playback time |
| 231 | Incorrect parameters for querying recording time |
| 232 | RTSP service not started |
| 233 | Screenshot unsuccessful |
| 234 | The page parameter of the query video is incorrect |
| 235 | Video does not exist |
| 240 | Illegal face attribute name |
| 241 | Duplicate name of face attribute |
| 242 | The number of face attributes exceeds the maximum limit |
| 243 | The specified face attribute does not exist |
| 260 | X coordinate of left end point of mixing line is out of range |
| 261 | Y coordinate of left end point of mixing line is out of range |
| 262 | X coordinate of right end point of mixing line is out of range |
| 263 | Y coordinate of right end point of mixing line is out of range |
| 264 | Resolution setting out of range |
| 265 | People flow statistics granularity parameter out of range |
| 266 | Start time setting exception, UNIX time stamp must be used |
| 267 | End time setting exception, UNIX time stamp must be used |
| 268 | Query parameter (order) setting exception |
| 269 | Query parameter (group name) setting exception |
| 270 | Query parameter (gender) setting exception |
| 271 | Query parameter (age) setting exception |
| 272 | Query parameter (age_range) setting exception |
| 273 | Query parameter (page_num) setting exception |
| 274 | Query parameter (page_size) setting exception |
| 275 | Query parameter (faceid) setting exception |
| 276 | X coordinate difference between right end point of mixing line and left end point of mixing line is less than 100 |
| 277 | The passed in parameter is not a reasonable JSON table format |
| 278 | Configuration save failed |
| 279 | Configuration read failed |
| 280 | No face information found in database |
| 281 | Query parameter (user added face attribute) setting exception |
| 282 | Query parameter (user added face attribute value) data type setting exception |
| 310 | The subscribed message event does not exist |
