[chbot] Inexpensive ESP32+camera module.

[Mike Field]

Sadly I can't make Monday's meeting, but if I could I would show off an 
inexpensive  (US$7) ESP32 + 2MP camera module that arrived during the week.

With a little bit of hackery based on 
https://github.com/igrr/esp32-cam-demo I had a sub-matchbox size camera 
blutack-ed to the front window, (at an bit of an angle angle) and had a 
Linux box grabbing an image every 30 seconds or so.(The module can also 
can run in "streaming" mode at about 5 frames per second).

I then used ImageMagick to convert to a very poor quality MPG file, that 
you can see at https://youtu.be/WH1A13zad4o

Sure, the images are limited to at most 800x600, frame rates are low,  
and is quality is best described as "pretty bad", however you do get the 
controller, WiFi, Bluetooth, a uSD slot and 10 GPIO pins that you can 
use for other things.

Power is ~150mA when WiFi is active, and haven't tested the deep-sleep 
power, but guessing it is about 10mA based on the AMS1117 3V3 regulator.

Have a look at 
https://www.aliexpress.com/item/ESP32-CAM-WiFi-Bluetooth-Module-Camera-Module-Development-Board-ESP32-with-Camera-Module-OV2640-2MP/32919183232.html 
if interested.

Mike