OG_MU2-ESP_v10e
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Circuit Design, Inc.
OPERATION GUIDE
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2.3.2 JPEG image/file transmission
A JPEG image and file transmission sample that exceeds one packet.
The MU-2-R can send up to 255 bytes of user data at one time, but to send larger amounts of data, it is necessary to
make a file transfer protocol in the user program.
This program uses a data transmit command with an ACK response.
However, since the program does not perform ACK response detection using ARQ (resend request), files may not
be transmitted normally due to radio transmission errors.
* Ensure that the file size is less than 20 KB.
* Do not specify images other than JPEG images.
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[1] Transmitting box
Shows the contents of the file for transmission (including the JPEG image file).
[2] Data size of the file for transmission (JPEG image)
Indicates the data size of the file for transmission in bytes.
[3] Transmit screen mode switcher
Switches the display mode of the transmitting box between Hex and Text.
In the text mode, text files are displayed normally, but binary files cannot be displayed.
Binary files should be displayed as Hex.
[4] JPEG image for transmission
The selected JPEG image is displayed.
[5] JPEG image samples
JPEG samples for image transmission. Clicking with the mouse selects the image to transmit. The data size of the
files is 4.5, 5.7, and 8.3 KB from the top. Displaying and transmitting the image takes some time.
[6] Transmit indicator
Shown in red when data is being transmitted.
[7] ACK indicator
Displays the ACK response from the target station.
[8] Transmit button (F9)
The contents shown in the transmitting box (JPEG image and file) are transmitted.
[9] Open JPEG file button
Clicking this button opens the open JPEG image file dialogue. You cannot test transmission with an image bigger
than 20 KB. Processing files with a larger data size takes some time.
