Like most of us, im a bit time poor, so sorry for the lack of info!
Essentially this uses: 2 esp32's - one with a camera, one without
I started with the 10 dollar webcam article (included below!) and added a button. When the button is pressed, a get request is pushed to the second esp32. The second esp32 then plays a tone through a 50mm speaker direct from the esp32 using a tone library.
The setup works very reliably. Both devices use the esp32 autowifi library which makes setup for wifi easier (there are some docs online for that)
THings this that could be improved: Dicoevery of master / slave to avoid manually mathcing the I.P. address of the devices. The webcam end needs to know the I.P. address of the chime.
The tone could be improved... anybody?
Hope you enjoy! if you need any info just let me know!
This little project has two goals:
- Be a little open source webcam (with so-so quality, but hey $10 and open source)
- Serve as an example app for the Micro-RTSP library.
These camera are very cheap (< $10) and the ESP32 has a fair amount of horsepower left over for other work.
Virtually any OV2460 + ESP32 board should work.
For boards other than this list you might (probably not) need to change esp32cam_config to use the GPIO assignments for your hardware.
I've tested the following boards with the stock config: ex1, ex2, ex3.
This board is great in some ways: it has PSRAM (so can in theory capture might higher res images than SVGA) and it is cheap and tiny. Two downsides:
- It has no built in USB port, so to program you'll need to use a USB serial adapter. See docs for a photo of the proper pins.
- The GPIO assignments are different for the camera, so you'll need to define USEBOARD_AITHINKER
@drmocm contributed a config file for this great board. It might be the current best choice because it
has an extra 8MB of RAM which makes it possible to use very high resolutions on the camera.
You will need to #define USEBOARD_TTGO_T in ESP32-devcam.ino to get the proper bindings for this board.
This project uses the simple PlatformIO build system. You can use the IDE, but for brevity in these instructions I describe use of their command line tool.
- Purchase one of the inexpensive ESP32-CAM modules from asia (see above).
- Install PlatformIO.
- Download this git repo and cd into it.
- pio run -t upload (This command will fetch dependencies, build the project and install it on the board via USB)
The first time you run your device you'll need to use an Android or iOS app to give it access to your wifi network. See instructions here.
At this point your device should be happily serving up frames. Either via a web-browser at http://yourdeviceipaddr or more interestingly via a standard RTSP video stream. If your device has an LCD screen it will be showing the IP address and boot messages to that screen.
To see the RTSP stream use the client of your choice, for example you can use VLC as follows:
vlc -v rtsp://yourdevipaddr:8554/mjpeg/1
Note: an older version of these instructions/code had you manually place your wifi keys into the source code. That code is now commented out, in favor of AutoWifi.