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esp-idf-http-camera

Take a picture and Publish it via HTTP.
This project use ESP32 Camera Driver.

slide-0001 slide-0002

Server Side

Download the server from here.

http-server http-server-2 http-server-3


ESP32 Side

Hardware requirements

ESP32 development board with OV2640 camera.
If you use other camera, edit sdkconfig.default.
From the left:

  • Aithinker ESP32-CAM
  • Freenove ESP32-WROVER CAM
  • UICPAL ESPS3 CAM
  • Freenove ESP32S3-WROVER CAM (Clone)

es32-camera

Software requirements

esp-idf v4.4/v5.0.

Installation

For AiThinker ESP32-CAM, You have to use a USB-TTL converter.

ESP-32 USB-TTL
U0TXD RXD
U0RXD TXD
GPIO0 GND
5V 5V
GND GND
git clone https://github.com/nopnop2002/esp-idf-http-camera
cd esp-idf-http-camera
idf.py set-target {esp32/esp32s3}
idf.py menuconfig
idf.py flash monitor

Start firmware

For AiThinker ESP32-CAM, Change GPIO0 to open and press the RESET button.

Configuration

Set the following items using menuconfig.

config-main config-app

Wifi Setting

config-wifi-1

You can connect using the mDNS hostname instead of the IP address.
config-wifi-2

You can use static IP.
config-wifi-3

Using mDNS hostname

You can connect using the mDNS hostname instead of the IP address.

  • esp-idf V4.3 or earlier
    You will need to manually change the mDNS strict mode according to this instruction.
  • esp-idf V4.4
    If you set CONFIG_MDNS_STRICT_MODE = y in sdkconfig.defaults, the firmware will be built with MDNS_STRICT_MODE.
    If MDNS_STRICT_MODE is not set, mDNS name resolution will not be possible after long-term operation.
  • esp-idf V4.4.1
    mDNS component has been updated.
    If you set CONFIG_MDNS_STRICT_MODE = y in sdkconfig.defaults, the firmware will be built with MDNS_STRICT_MODE.
    Even if MDNS_STRICT_MODE is set, mDNS name resolution will not be possible after long-term operation.
  • esp-idf V5.0 or later
    mDNS component has been updated.
    Long-term operation is possible without setting MDNS_STRICT_MODE.
    The following lines in sdkconfig.defaults should be removed before menuconfig.
    CONFIG_MDNS_STRICT_MODE=y

HTTP Server Setting

config-http

Attached File Name Setting

You can choose the file name on the HTTP server side from the following.

  • Always the same file name
  • File name based on date and time
    When you choose date and time file name, you will need an NTP server.
    The file name will be YYYYMMDD-hhmmss.jpg.

config-filename-1 config-filename-2

  • Add FrameSize to Remote file Name
    When this is enabled, FrameSize is added to remote file name like this.
    20210520-165740_800x600.jpg

config-filename-3

Select Board

config-board

Select Frame Size

Large frame sizes take longer to take a picture.
config-framesize-1 config-framesize-2

Select Shutter

You can choose one of the following shutter methods

  • Shutter is the Enter key on the keyboard
    For operation check.
    When using the USB port provided by the USB Serial/JTAG Controller Console, you need to enable the following line in sdkconfig.
CONFIG_ESP_CONSOLE_USB_SERIAL_JTAG=y

config-shutter-1

  • Shutter is a GPIO toggle

    • Initial Sate is PULLDOWN
      The shutter is prepared when it is turned from OFF to ON, and a picture is taken when it is turned from ON to OFF.

    • Initial Sate is PULLUP
      The shutter is prepared when it is turned from ON to OFF, and a picture is taken when it is turned from OFF to ON.

I confirmed that the following GPIO can be used.

GPIO PullDown PullUp
GPIO12 OK NG
GPIO13 OK OK
GPIO14 OK OK
GPIO15 OK OK
GPIO16 NG NG

config-shutter-2

  • Shutter is TCP Socket
    You can use tcp_send.py as shutter.
    python3 ./tcp_send.py

config-shutter-3

  • Shutter is UDP Socket
    You can use udp_send.py as shutter.
    Requires netifaces.
    python3 ./udp_send.py

config-shutter-4

  • Shutter is HTTP Request
    You can use this command as shutter.
    curl "http://esp32-camera.local:8080/take/picture"

config-shutter-5

Flash Light

ESP32-CAM by AI-Thinker have flash light on GPIO4.

config-flash

PSRAM

When you use ESP32S3-WROVER CAM, you need to set the PSRAM type.

config-psram

View picture using Built-in WEB Server

ESP32 works as a web server.
You can view the pictures taken using the built-in WEB server.
Enter the ESP32's IP address and port number in the address bar of your browser.
You can connect using mDNS hostname instead of IP address.

browser

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