Command Control via the Network (continued)

2. Response code / Error code ("h" shows hexadecimal)

The connection ID is attached for the TCP#23's response / error codes are used. The connection ID is same as the sending command format.

(1) ACK reply : 06h + ××h

(××h : connection ID)

(2)NAK reply : 15h + ××h

(3)Error reply : 1Ch + 0000h + ××h

(4)Data reply : 1Dh + xxxxh + ××h

(5)Authentication error reply : 1Fh + 0400h + ××h

(6)Projector busy reply: 1Fh + ××××h + ××h

When the projector is too busy to receives the command, the projector returns the error code.

In such a case, check the sending code and send the same command again.

Automatic Connection Break

The TCP connection will be automatically disconnected after there is no communication for 30 seconds after being established.

Authentication

The projector does not accept commands without authentication success when authentication is enabled. The projector uses a challenge response type authentication with an MD5 (Message Digest 5) algorithm. When the projector is using a LAN, a random 8 bytes will be returned if authentication is enabled. Bind this received 8 bytes and the authentication password and digest this data with the MD5 algorithm and add this in front of the commands to send.

Following is a sample if the authentication password is set to “password” and the random 8 bytes are “a572f60c”.

1)Select the projector.

2)Receive the random 8 bytes “a572f60c” from the projector.

3)Bind the random 8 bytes “a572f60c” and the authentication password “password” and it becomes “a572f60cpassword”.

4)Digest this bind “a572f60cpassword” with MD5 algorithm. It will be “e3d97429adffa11bce1f7275813d4bde”.

5)Add this “e3d97429adffa11bce1f7275813d4bde” in front of the commands and send the data.

Send “e3d97429adffa11bce1f7275813d4bde”+command.

6)When the sending data is correct, the command will be performed and the reply data will be returned. Otherwise, an authentication error will be returned.

NOTE • As for the transmission of the second or subsequent commands, the authentication data can be omitted when the same connection.

ViewSonic

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Pro9500

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ViewSonic VS13835 warranty ACK reply 06h + ××h, ××h connection ID, 202
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VS13835 specifications

The ViewSonic VS13835 is a versatile and high-performance projector that caters to both home entertainment and professional presentation needs. This model has been designed to deliver stunning visual quality, making it an ideal choice for users looking for sharp and vibrant images.

One of the standout features of the VS13835 is its high brightness level. With a brightness of 3,600 ANSI lumens, this projector ensures that images remain clear and visible even in well-lit environments. This feature makes it suitable for classrooms, conference rooms, and even outdoor movie nights. Coupled with a native resolution of 1080p (1920x1080), it supports Full HD content, providing sharp detail and dynamic color reproduction.

Another key characteristic of the VS13835 is its advanced color technology. ViewSonic employs ColorMax technology, which enhances color accuracy and offers a broader color spectrum. This ensures that users experience rich and lifelike colors that are crucial for presentations and movie screenings alike. Additionally, the projector uses the SuperEco mode, which helps to extend the lamp life considerably, providing up to 15,000 hours in economy mode, thus lowering maintenance and replacement costs.

Connectivity options are abundant in the VS13835, with multiple ports available, including HDMI, USB, and VGA inputs. This allows for seamless connections to various devices such as laptops, Blu-ray players, and gaming consoles. Furthermore, the projector supports wireless connectivity, enabling users to project content from smartphones and tablets effortlessly.

The VS13835 also comes equipped with a vertical keystone correction, enabling straightforward adjustment of the image to fit any projection surface. This feature is particularly beneficial in environments where space may be limited or where the projector needs to be positioned at an angle.

In terms of design, the ViewSonic VS13835 has a sleek and portable build, making it easy to transport for on-the-go presentations. With its robust features, high-quality performance, and user-friendly design, the ViewSonic VS13835 stands out as a top option for anyone in need of a reliable projector for both professional and personal use.
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