RICOH THETA SC2 API Tests Using Public Information

RICOH THETA API requests for SC2. Based on community tests
of the public
API reference for V and Z1.
These tests do not use SC2 API documentation as the SC2 API is not listed
as a supported camera on the public documentation.

The SC2 API differs from the API for the V and Z1. See
this site for
more information.

As of July 16, 2020, these are the known issues with the SC2 API:

• listFiles does not return thumbnails even if the parameters are set for thumbnails
• RICOH SDK does not work reliably with livePreview frames. Will stop of EOF exception
• livePreview stops when certain commands are issued to the SC2
• getMetaData does not return correct values
• status cannot be used with startCapture.

See the site and written guide for more information.

The SC2 API is similar to the Z1 API.

Additional information is on the blog

Configuration and Installation

1. install dart
2. clone this repo
3. run pub get to install dependencies

$ pub get
Resolving dependencies... (1.2s)
Downloading args 1.5.3...
Downloading http 0.12.0+4...
Downloading pedantic 1.9.0...
Downloading async 2.4.0...
Downloading source_span 1.6.0...
Downloading charcode 1.1.3...
Downloading meta 1.1.8...
Got dependencies!

Usage

1. connect workstation to THETA with camera in access point (AP) mode
2. run main.dart file in bin with the appropriate command

Example with info

 dart bin/main.dart info

Instead of info, you can also use other commands:

Example with state

dart bin/main.dart state

Working commands:

• info
• state
• takePicture
• listFiles
• getOptions
• downloadFile
• getMetadata
• firmware – prints firmware version and camera model
• downloadReady – takes pictures and checks if picture is ready for download
• takeAndDownload – take picture and download using osc/state to get file URL
• setExposureDelayFive – set self-timer to five
• setExposureDelayZero – turn off self-timer
• setHdr – public API reference

Explanation

POST example

response from THETA SC2

Take Picture Example

If you send a payload such as {'name': 'camera.takePicture'} as part of your
request, you must encode the body as JSON. You can use json.encode(your-payload-object)
or the new jsonEncode() https://api.dart.dev/stable/2.7.1/dart-convert/jsonEncode.html

Test from THETA SC2. OK!

Response from SC2 shown below.

C:\Users\craigdev\Development\personal\dart>dart bin/main.dart
[]
200
{
  "name": "camera.takePicture",
  "id": "1588",
  "progress": {
    "completion": 0.0
  },
  "state": "inProgress"
}

List Files

https://api.ricoh/docs/theta-web-api-v2.1/commands/camera.list_files/

This shows a more complex nested payload with parameters.

Response

$ dart bin/main.dart 
[]
200
{
  "name": "camera.listFiles",
  "results": {
    "entries": [
      {
        "dateTimeZone": "2020:03:18 17:12:32-07:00",
        "fileUrl": "http://192.168.1.1/files/150100525831424d42079d18e0b6c300/100RICOH/R0010024.JPG",
        "height": 2688,
        "isProcessed": true,
        "name": "R0010024.JPG",
        "previewUrl": "",
        "_projectionType": "Equirectangular",
        "size": 4362617,
        "_thumbSize": 2749,
        "width": 5376
      },

Get Options

The camera options you want to get need to be specified individually in an array.
I do not think you can get all the options with a wildcard or “all” specification.

Format of the data request is below.

var url ='http://192.168.1.1/osc/commands/execute';

  Map data = {
    'name': 'camera.getOptions',
    'parameters': {
      'optionNames': [
        "iso",
        "isoSupport"
      ]
    }

Response from a THETA SC2 running firmware 1.20 is shown below.

{
  "name": "camera.getOpions",
  "state": "done",
  "results": {
    "options": {
      "iso": 0,
      "isoSupport": [
        64,
        80,
        100,
        125,
        160,
        200,
        250,
        320,
        400,
        500,
        640,
        800,
        1000,
        1250,
        1600,
        2000,
        2500,
        3200
      ]
    }
  }
}

Camera Firmware Tested

• Z1 1.31.1
• RICOH THETA SC 1.20
• V 3.21.1

Troubleshooting Camera

Testing Connection with GET info

The simplest command to the camera is GET info.

You can test it in a browser, curl, Postman. In the test program, you can
look for the URL below.

String url = 'http://192.168.1.1/osc/info';

If you are having problems getting a camera connection and want to test your
code with a known working API that returns a single JSON object, you can use a public Internet test server to return a single JSON object and print it out.

// String url = 'https://swapi.co/api/people/1';
// String url = 'https://jsonplaceholder.typicode.com/users/1';

Read about why we’re using Dart.

GitHub

View Github