esp-idf-ftp-camera

Take a picture and Publish it via FTP.
This project use ESP32 Camera Driver.
This project use ESP32-FTP-Client.

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)

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-ftp-camera
cd esp-idf-ftp-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.

Wifi Setting

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

You can use static IP.

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

FTP server Setting

You can specify mDNS hostname for the FTP server.

Store pictures in FTP Server subdirectories.

Create index.html on FTP Server.
When your FTP server acts as an HTTP server, You can view picture using browser.

You can specify the rotation of the image.

My FTP server acts as an HTTP server.

Remote File Name Setting

You can choose the file name on the FTP 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.

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

Select Board

Select Frame Size

Large frame sizes take longer to take a picture.

Select Shutter

You can choose one of the following as shutter

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

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

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

Shutter is UDP Socket
You can use this command as shutter.
echo "take" | socat - UDP-DATAGRAM:255.255.255.255:9876,broadcast
You can use udp_send.py as shutter.
Requires netifaces.
python3 ./udp_send.py

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

Shutter is MQTT Subscribe
You can use this command as shutter.
mosquitto_pub -h broker.emqx.io -p 1883 -t "/take/picture" -m "take picture"
The firmware can be restarted when disconnected from the MQTT server.

Shutter is Remote file polling
Take a picture if there is a file on the FTP server.
Check if the file exists at 10 second intervals.

You can choose to create a file or delete a file.
If you use Android, deleting files is easier.

Flash Light

ESP32-CAM by AI-Thinker has a flash light on GPIO4.

PSRAM

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

Take picture using flask application

You can use flask application.
read this.

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.

Take pictures using Android

I use API Tester: HTTP Client app.
You can download from Google Play.
This app can easily issue HTTP requests.
You can easily take pictures by setting HTTP Request to shutter.
However, on Android, name resolution by mDNS is not possible.

Take & view pictures using Android

I use X-plore File Manager app.
You can download from Google Play.
This app can easily view the files on the FTP server.
This app can easily delete files on FTP server.
It's much easier to delete a file than to create a new one.
You can easily take pictures by setting remote file deletion to shutter.
You can operate the ESP32 with just your fingertips.
If you use a rental server, you can take pictures of London from New York.
Very Good!!