ESP32cam - remote viewing and control remote door (from different network)

Remote door opener/closer with webcam. - Using a ESP32cam or similar - remotely open/close door - activate webcam remotely and view remotely (from different network) - ESP32 connects via wifi (and 3G/5G module) - motor (with motor controller L294N or similar) - motor with low rpm wormgear - turns from 0 deg CW then back 180 deg CCW to open/close door - motor has limit switch that indicated at 0 deg position. Door has spring on it to close 'push it in closed position'. - door has solenoid lock (which holds door open - solenoid lock has limit switch to indicate in open/closed state ) - touch sensor at door - touch sensor - solenoid lock releases - door closes. - can use a PCF8574 or similar to add gpio pins to esp32 - remote control - remove viewing on web and/or mobile phone - can turn on/off live view - can open/close door - should be able to store +/-20 seconds before door open/closed - and save that 40 seconds in a file - every time door closes. - I have the mechanical part done - and I can control the door with an ardunio Nano - open/close door (my code might not be pretty!) - need to make it work remotely (wifi and over 3G/4g) - need to make webcam (and open/close door) work remotely - able to view on browser (chrome, mozilla, safari) and on mobile devices (apple and android) - should be able to load wifi credentials into device with mobile or similar (so I don't have to flash device with specific router user/pass info) - needs OTA (and remote) updating of code - Note for remote access to esp32 - I don't want to deal with configuring router. - WebRTC - if possible and/or set up ICE to get through firewalls easily! Or similar.... - And if possible - integrate into HomeAssisant (and work remotely) - Note - there maybe be multiple devices in multiple areas - controlled by different people...