Camera WiFi Remote Module

CWRM stands for Camera WiFi Remote Module. It is a ESP8266-based device that allows to trigger the focus/shutter of a camera via WiFI. It is in early stage but it works with my Canon camera™.

Schematic

Parts

• 1 x ESP8266-01 (U1)
• 2 x 2.2k ohms (R1 and R2)
• 2 x 3.3k ohms (R3 and R4)
• 2 x 2N2222 (Q1 and Q2)
• 2.5mm male stereo plug (connected to J1, for Canon cameras)
• 3.3V power supply (like 2 AAA batteries)

Case

A STL file is provided to 3D-print a case for this module. It costs ~20 euros on Shapeways.

Software

The module creates its own WiFi network, and then acts as a captive portal, redirecting everything to 192.168.10.1. A simplistic web page is served to control the camera.

Development

The source code can be found in the cwrm/ folder (Arduino IDE requires the same name for both the main sketch and its directory). You can compile the firmware using make (recommended):

$ make clean
$ make

By default, it is compiled for release purpose. You can also compile a debug version with:

$ make debug

You will need html-minifier installed to compile the HTML code and generate the cwrm/cwrm_generated.h file:

$ npm install html-minifier -g
$ make compile-html

This project uses the following libraries/tools:

• AJAX lib: https://github.com/yanatan16/nanoajax
• Makefile: https://github.com/plerup/makeEspArduino
• CI build: https://github.com/adafruit/travis-ci-arduino

Similar projects

• https://guillermoamaral.com/read/canon-wifimote/

License

CWRM is released under the MIT License. See the bundled LICENSE file for details.