Tilt-pan ESP32-Cam firmware

Original base code taken from here: https://randomnerdtutorials.com/esp32-cam-pan-and-tilt-2-axis/

Also expressif demo code examples for ESP32-CAM

Stuff added

1. Converted to PlatformIO project (I am using PlatformIO plugin for VS Code
2. Added zeroconf/ mDNS via ESPmDNS library.
3. Control of 9G servos off ESP32CAM pins, using ESP32Servo library.
4. (web api) EEPROM on tilt and pan servo values
5. (web-api) User-control of amount of rotation as well as direction
6. (web api) Change framesize and jpeg-quality
7. Changed up web UI so you get tilt and pan updates.
8. (Local network) OTA updating

Config

<name>, the mDNS device name, is set in PanTiliWebCam.cpp Eneter wifi details in demo_network_credentials.h and rename to network_credentials.h

Api

Web ui

http://<name>.local

Video stream

http://<name>.local:81/stream

Commands

Move camera

Move default increment (5 degrees)

http://<name>.local/action?go=<left|right|up|down>

Move <x> degrees

http://<name>.local/action?go=<left|right|up|down>&degrees=<x>

200 response is a JSON with current tilt and pan angles

Change framesize/ resolution

<framesize> is an integer corresponding to framesize_t type in esp32_camera library sensor.h

http://<name>.local/action?framesize=<framesize>

Change quality

<quality> is an integer (0-63)

http://<name>.local/action?quality=<quality>

EEPROM

Reset camera to saved settings

http://<name>.local/action?eeprom=0

Save current camera settings to EEPROM

http://<name>.local/action?eeprom=1

Software reset on ESP32

http://<name>.local/action?reset=1

OTA (or USB) flashing to ESP32

Use esp32camUSB environment for uploading via USB - you'll have to do this first time anyway!

Use esp32camOTA for OTA updating. https://docs.platformio.org/en/latest/platforms/espressif32.html#over-the-air-ota-update