Code 196

Command 196 - Get Function Version

Unknown, but was sent 8 times before printing a Photo. The Map that is filled is then sent in an internal Android Handler message. Sadly the decompiler failed to decompile the code that handles the incoming HashMap so I'm not sure what it's used for..

Decompiled source investigation:

doSomething(Map<Int, Int> map):
    for (int number : map.keys):
        Bytes[4] bytes
        bytes[0] = 0;
        bytes[1] = 0;
        bytes[2] = (num >> 8) & 255;
        bytes[3] = (num >> 0) & 255;

        response = sendCommand(196, bytes, 4); // 4 is the length of bytes
        if(response == OK):
            map[number] = response.getTwoByteInt(2); // Byte 16+2 = byte 18

Command Code: 196

Example Command Payload

Byte	Description	Hex	Notes
Payload
Byte 1	Unknown..	00
Byte 2	Unknown..	00
Byte 3	Unknown..	00
Byte 4	Unknown..	08

Example Response Payload

Byte	Description	Hex	Notes
Payload
Byte 12	Return Code	00	See [Return Codes](https://github.com/jpwsutton/instax_api/wiki/Return-Codes)
Byte 13		00	Unknown..
Byte 14	Ejecting	00	(b14 >> 2 )& 1
Byte 15		3a	Unknown..
Byte 16		00
Byte 17		08
Byte 18	Thing MSB	00
Byte 19	Thing LSB	00

Example Command Payload Pairs

These command and response payloads were recorded just before a picture was printed. Although they are in an odd order, from looking at the code, they would have been sent in order from 1 to 8. In all cases, only 1-8 is sent, no more no less.

Command	Response	Notes
00000008	00080000	0
00000005	00050001	1
00000003	00030002	2
00000004	00040001	1
00000001	00010002	2
00000007	00070000	0
00000006	00060000	0
00000002	00020002	2