camera module
Only available with ESP32-cam board with OV2640 camera. Manages the camera settings and initialization, sends images to the server via socket.io.
No permanent settings, camera settings can be adjusted during operation.
| key | type | range | description |
|---|---|---|---|
| getStatus | boolean | – | send current status if true |
| gray | boolean | – | convert image to RGB grayscale if true |
| brightness | integer | (-2, 2) | adjust brightness of the image |
| exposure | integer | (0, 1200) | set exposure to adjust image brightness manually |
| contrast | integer | (-2, 2) | adjust contrast |
| stream | boolean | – | continuously send images to server if true, stop sending if false |
| virtualPan | integer | – | increase virtual pan stage if > 0 and decrease if < 0 |
| virtualTilt | integer | – | increase virtual tilt stage if > 0 and decrease if < 0 |
| virtualZoom | integer | – | increase virtual zoom stage if > 0 and decrease if < 0 |
| frame rate | float | (0, 30) | set the frame rate to the specified number of frames per second |
| frameSize | integer | (5, 13) | set the frame size to the specified value |
details of the available options for the frame size -- note that 7 and 11 are not permitted and will throw an error
| value | name | frame size |
|---|---|---|
| 5 | QVGA | 320 x 140 |
| 6 | CIF | 400 x 296 |
| 8 | VGA | 640 x 480 |
| 9 | SVGA | 800 x 600 |
| 10 | XGA | 1024 x 768 |
| 12 | SXGA | 1280 x 1024 |
| 13 | UXGA | 1600 x 1200 |
The following keys expose the native settings of the camera driver, use with caution:
| key | type | range | description |
|---|---|---|---|
| contrast | integer | (-2,2) | |
| brightness | integer | (-2,2) | |
| saturation | integer | (-2,2) | |
| sharpness | integer | (-2,2) | |
| denoise | integer | (0,255?) | actual range unknown, uint8 |
| gainceiling | integer | (0,6) | 0=2x, 1=4x, 2=8x, 3=16x, 4=32x, 5=64x, 6=128x |
| quality | integer | (0,63) | |
| colorbar | boolean | – | |
| whitebal | boolean | – | |
| gain_ctrl | boolean | – | |
| exposure_ctrl | boolean | – | |
| hmirror | boolean | – | |
| vlip | boolean | – | |
| aec2 | boolean | – | |
| awb_gain | boolean | – | |
| agc_gain | integer | (0,30) | |
| aec_value | integer | (0,1200) | |
| wb_mode | integer | (0,4) | |
| ae_level | integer | (-2,2) | |
| dcw | boolean | – | |
| bpc | boolean | – | |
| wpc | boolean | – | |
| raw_gamma | boolean | – | |
| lenc | boolean | – | |
| special_effect | integer | (0,6) |
"controlId":"screen",
"status":
{
"stream":true,
"frameSize":10,
"gray":false,
"exposure":500,
"contrast":0
}Meaning of status fields identical to Command Keys, see there for description
