Other device names than GT01 are possible

[omgmog]

I see you've hard-coded the device search to GT01, with my cat printer the device name is GB02.

I bought my cat printer from Wish.com, it's a "Wirelessly BT 203dpi Mini Thermal Printer Photo Label Memo Wrong Question Printing with USB Cable imprimante portable".

After some searching around and looking at other cat printer_-related_ projects, there are a few variations: GB01, GB02, GT01

Visually the device looks identical to yours. It uses the same iPrint software from the Google Play Store.

Changing the hard-coded GT01 to GB02 in ble.py seems to make the script work with my cat printer.

(venv) max@mbp catprinter % python print.py ~/Desktop/cool.png
⏳ Applying Floyd-Steinberg dithering to image...
✅ Done.
✅ Read image: (384, 384) (h, w) pixels
✅ Generated BLE commands: 19009 bytes
⏳ Looking for a BLE device named GB02...
✅ Got it. Address: EF9E8FA3-81D1-4426-9451-38AA6EB13B71: GB02
⏳ Connecting to EF9E8FA3-81D1-4426-9451-38AA6EB13B71: GB02...
✅ Connected: True; MTU: 248
⏳ Sending 19009 bytes of data in chunks of 245 bytes...
✅ Done.
(venv) max@mbp catprinter %

[rbaron]

Hey @omgmog,

That's great to hear. Thanks for sharing the info and the links.

I think we can add a --name command line argument with a default value. I'll see to it when I'm at my computer, but feel free to contribute if you'd like.

I recall seeing a bunch of different names (something like 20 or so) in the decompiled app, each one had slightly different parameters (image dpi, whether it support the run-length compression etc). I'll also try and link that info in this issue as well.

[rbaron]

In the decompiled app, in src/main/java/com/blueUtils/PrinterModel.java, there is a bunch of printer names and some associated parameters:

public static DataBean getModel(String str) {
    if ("XW001".equals(str)) {
        return new DataBean("XW001", "日历", 0, 2, C1797R2.attr.cameraPictureSizeMinHeight, C1797R2.attr.cameraPictureSizeMinHeight, 8, "PR20-", false, 200, 45, 35, 0, 0, false, 2, 2, false, 0, 0, 0, false);
    }
    if ("XW002".equals(str)) {
        return new DataBean("XW002", "日历", 0, 2, 576, 576, 12, "PR30-", false, 300, 45, 35, 0, 0, true, 2, 2, false, 0, 0, 0, false);
    }
    if ("XW004".equals(str)) {
        return new DataBean("XW004", "大嘴巴", 1, 2, 576, 576, 12, "PRM30-", false, 300, 45, 35, 0, 0, true, 2, 2, false, 0, 0, 0, false);
    }
    if ("XW005".equals(str)) {
        return new DataBean("XW005", "复古打字机款", 1, 3, 576, C1797R2.attr.cameraPictureSizeMinHeight, 8, "", false, 200, 45, 45, 0, 0, true, 2, 2, false, 0, 0, 0, false);
    }
    if ("XW006".equals(str)) {
        return new DataBean("XW006", "复古打字机款", 1, 3, 576, 576, 12, "", false, 300, 45, 35, 0, 0, true, 2, 2, false, 0, 0, 0, false);
    }
    if ("XW007".equals(str)) {
        return new DataBean("XW007", "4寸款", 1, 4, C1797R2.attr.cameraPictureSizeMinHeight, C1797R2.attr.cameraPictureSizeMinHeight, 8, "", true, 200, 45, 45, 183, 183, true, 2, 2, false, 0, 0, 0, false);
    }
    if ("XW008".equals(str)) {
        return new DataBean("XW008", "4寸款", 1, 4, 576, 576, 12, "", true, 300, 45, 35, 183, 183, true, 2, 2, false, 0, 0, 0, false);
    }
    if ("XW009".equals(str)) {
        return new DataBean("XW009", "大嘴巴", 0, 2, C1797R2.attr.cameraPictureSizeMinHeight, C1797R2.attr.cameraPictureSizeMinHeight, 8, "P25-", false, 200, 45, 45, 0, 0, true, 2, 2, true, 0, 0, 0, false);
    }
    if ("XW009_BLE".equals(str)) {
        return new DataBean("XW009_BLE", "大嘴巴", 0, 4, C1797R2.attr.menu_labels_maxLines, C1797R2.attr.menu_labels_maxLines, 8, "P25-", true, 300, 45, 45, 183, 183, true, 2, 2, false, 0, 0, 0, false);
    }
    if ("JX001".equals(str)) {
        return new DataBean("JX001", "2寸款", 0, 2, C1797R2.attr.cameraPictureSizeMinHeight, C1797R2.attr.cameraPictureSizeMinHeight, 8, "JX01-", false, 200, 90, 45, 0, 0, true, 2, 3, false, 0, 0, 0, false);
    }
    if ("JX002_BLE".equals(str)) {
        return new DataBean("JX002", "2寸款", 0, 2, 576, 576, 12, "JX02-", true, 300, 30, 25, 183, 163, false, 2, 2, false, 0, 0, 0, false);
    }
    if ("JX003_BLE".equals(str)) {
        return new DataBean("JX003_BLE", "4寸款", 0, 4, C1797R2.attr.menu_labels_maxLines, C1797R2.attr.menu_labels_maxLines, 16, "JX03-", true, 200, 20, 20, 183, 183, true, 2, 2, false, 0, 0, 0, false);
    }
    if ("JX004_BLE".equals(str)) {
        return new DataBean("JX004", "4寸款", 0, 4, C1797R2.C1799color.mtrl_scrim_color, C1797R2.C1799color.mtrl_scrim_color, 24, "JX04-", true, 300, 60, 20, 183, 183, true, 2, 2, false, 0, 0, 0, false);
    }
    if ("JX005_BLE".equals(str)) {
        return new DataBean("JX005_BLE", "8寸款", 0, 8, 1600, C1797R2.dimen.dp_279, 8, "JX05-", true, 200, 90, 20, 183, 183, true, 3, 2, false, 0, 0, 0, false);
    }
    if ("JX006".equals(str)) {
        return new DataBean("JX006", "2寸款", 0, 2, C1797R2.attr.cameraPictureSizeMinHeight, C1797R2.attr.cameraPictureSizeMinHeight, 8, "JX06-", false, 300, 30, 20, 0, 0, true, 2, 2, true, 0, 0, 0, false);
    }
    if ("XW003".equals(str)) {
        return new DataBean("XW003", "大嘴巴", 1, 2, C1797R2.attr.cameraPictureSizeMinHeight, C1797R2.attr.cameraPictureSizeMinHeight, 8, "PR25-", false, 200, 45, 25, 0, 0, true, 2, 5, false, 0, 0, 0, false);
    }
    if ("M01".equals(str)) {
        return new DataBean("M01", "小恶魔款，wifi款", 1, 2, C1797R2.attr.cameraPictureSizeMinHeight, C1797R2.attr.cameraPictureSizeMinHeight, 8, "M01-", false, 200, 45, 25, 0, 0, true, 2, 5, false, 0, 0, 0, false);
    }
    if ("PR07".equals(str)) {
        return new DataBean("PR07", "智伴，wifi款", 1, 2, C1797R2.attr.cameraPictureSizeMinHeight, C1797R2.attr.cameraPictureSizeMinHeight, 8, "PR07-", false, 200, 45, 25, 0, 0, true, 2, 5, false, 0, 0, 0, false);
    }
    if ("PR02".equals(str)) {
        return new DataBean("PR02", "多表情款，纯蓝牙", 0, 2, C1797R2.attr.cameraPictureSizeMinHeight, C1797R2.attr.cameraPictureSizeMinHeight, 8, "PR02-", true, 200, 10, 10, 123, 123, true, 2, 6, false, C1797R2.string.picture_not_crop_data, C1797R2.string.picture_not_crop_data, C1797R2.string.picture_not_crop_data, true);
    }
    if ("P10".equals(str)) {
        return new DataBean("P10", "多表情款，纯蓝牙", 0, 2, C1797R2.attr.cameraPictureSizeMinHeight, C1797R2.attr.cameraPictureSizeMinHeight, 8, "P10-", true, 200, 10, 10, 123, 123, true, 2, 6, false, C1797R2.string.picture_not_crop_data, C1797R2.string.picture_not_crop_data, C1797R2.string.picture_not_crop_data, true);
    }
    if ("GB01".equals(str)) {
        return new DataBean("GB01", "公版设备", 0, 2, C1797R2.attr.cameraPictureSizeMinHeight, C1797R2.attr.cameraPictureSizeMinHeight, 8, "GB01-", true, 200, 35, 25, 63, 43, false, 4, 6, false, 8000, 12000, 17500, false);
    }
    if ("GB02(BLE)".equals(str) || "GB02".equals(str)) {
        return new DataBean("GB02", "公版设备", 0, 2, C1797R2.attr.cameraPictureSizeMinHeight, C1797R2.attr.cameraPictureSizeMinHeight, 8, "GB02-", true, 200, 26, 25, 83, 83, false, 4, 6, false, 8600, 12000, 16000, false);
    }
    if ("GB03(BLE)".equals(str) || "GB03".equals(str)) {
        return new DataBean("GB03", "公版设备", 0, 2, C1797R2.attr.cameraPictureSizeMinHeight, C1797R2.attr.cameraPictureSizeMinHeight, 8, "GB03-", true, 200, 26, 25, 83, 103, false, 4, 6, false, 8600, 12000, 16000, true);
    }
    if ("GB04(BLE)".equals(str) || "GB04".equals(str)) {
        return new DataBean("GB04", "公版设备", 0, 2, C1797R2.attr.cameraPictureSizeMinHeight, C1797R2.attr.cameraPictureSizeMinHeight, 8, "GB04-", true, 200, 26, 25, 83, 83, false, 4, 6, false, 8600, 12000, 16000, true);
    }
    if ("LY01".equals(str)) {
        return new DataBean("LY01", "丽印机芯，愤怒小猪款,纯蓝牙", 0, 2, C1797R2.attr.cameraPictureSizeMinHeight, C1797R2.attr.cameraPictureSizeMinHeight, 8, "LY01-", false, 200, 40, 25, 0, 0, true, 2, 4, false, 0, 9500, 20000, false);
    }
    if ("LY02".equals(str)) {
        return new DataBean("LY02", "丽印机芯，愤怒小猪款，AI款", 0, 2, C1797R2.attr.cameraPictureSizeMinHeight, C1797R2.attr.cameraPictureSizeMinHeight, 8, "LY02-", false, 200, 45, 35, 0, 0, true, 2, 2, false, 0, 0, 0, false);
    }
    if ("LY03".equals(str)) {
        return new DataBean("LY03", "丽印机芯，愤怒小猪款，纯蓝牙", 0, 2, C1797R2.attr.cameraPictureSizeMinHeight, C1797R2.attr.cameraPictureSizeMinHeight, 8, "LY03-", true, 200, 10, 10, 83, 83, true, 2, 6, false, C1797R2.styleable.ucrop_UCropView_ucrop_frame_stroke_size, C1797R2.styleable.ucrop_UCropView_ucrop_frame_stroke_size, C1797R2.styleable.ucrop_UCropView_ucrop_frame_stroke_size, false);
    }
    if ("LY05".equals(str)) {
        return new DataBean("LY05", "丽印机芯，愤怒小猪款，纯蓝牙", 0, 3, 576, 576, 12, "LY05-", true, 200, 10, 10, 183, 183, true, 2, 6, false, C1797R2.styleable.ucrop_UCropView_ucrop_frame_stroke_size, C1797R2.styleable.ucrop_UCropView_ucrop_frame_stroke_size, C1797R2.styleable.ucrop_UCropView_ucrop_frame_stroke_size, true);
    }
    if ("LY10".equals(str)) {
        return new DataBean("LY10", HanziToPinyin.Token.SEPARATOR, 0, 2, C1797R2.attr.cameraPictureSizeMinHeight, C1797R2.attr.cameraPictureSizeMinHeight, 8, "LY10-", true, 200, 26, 25, 83, 83, true, 2, 4, false, 100, 100, 100, false);
    }
    if ("AI01".equals(str)) {
        return new DataBean("AI01", "AI款", 1, 2, C1797R2.attr.cameraPictureSizeMinHeight, C1797R2.attr.cameraPictureSizeMinHeight, 8, "AI01-", false, 200, 45, 25, 0, 0, true, 2, 5, false, 0, 0, 0, true);
    }
    if ("GT01".equals(str)) {
        if ("jingzhunxuexi_wand".equals(StringUtils.getString(C1789R.string.app_info))) {
            return new DataBean("GT01", HanziToPinyin.Token.SEPARATOR, 0, 2, C1797R2.attr.cameraPictureSizeMinHeight, C1797R2.attr.cameraPictureSizeMinHeight, 8, "GT01-", true, 200, 55, 45, 123, 83, true, 2, 4, false, 12000, 12000, 12000, true);
        }
        return new DataBean("GT01", HanziToPinyin.Token.SEPARATOR, 0, 2, C1797R2.attr.cameraPictureSizeMinHeight, C1797R2.attr.cameraPictureSizeMinHeight, 8, "GT01-", true, 200, 30, 25, 123, 83, true, 2, 4, false, 12000, 12000, 12000, true);
    } else if (!"GT02".equals(str)) {
        return new DataBean("", "日历", 0, 2, C1797R2.attr.cameraPictureSizeMinHeight, C1797R2.attr.cameraPictureSizeMinHeight, 8, "", false, 200, 45, 45, 0, 0, true, 2, 2, false, 0, 0, 0, false);
    } else {
        if ("jingzhunxuexi_wand".equals(StringUtils.getString(C1789R.string.app_info))) {
            return new DataBean("GT02", HanziToPinyin.Token.SEPARATOR, 0, 2, C1797R2.attr.cameraPictureSizeMinHeight, C1797R2.attr.cameraPictureSizeMinHeight, 8, "GT02-", true, 200, 55, 45, 123, 83, true, 2, 4, false, C1797R2.C1801id.tv_nickname, C1797R2.C1801id.tv_nickname, C1797R2.C1801id.tv_nickname, true);
        }
        return new DataBean("GT02", HanziToPinyin.Token.SEPARATOR, 0, 2, C1797R2.attr.cameraPictureSizeMinHeight, C1797R2.attr.cameraPictureSizeMinHeight, 8, "GT02-", true, 200, 30, 25, 123, 83, true, 2, 4, false, C1797R2.C1801id.tv_nickname, C1797R2.C1801id.tv_nickname, C1797R2.C1801id.tv_nickname, true);
    }
}

And the DataBean constructor provides some hints about these values:

public DataBean(String str, String str2, int i, int i2, int i3, int i4, int i5, String str3, boolean z, int i6, int i7, int i8, int i9, int i10, boolean z2, int i11, int i12, boolean z3, int i13, int i14, int i15, boolean z4) {
    this.modelNo = str;
    this.modelName = str2;
    this.model = i;
    this.size = i2;
    this.paperSize = i3;
    this.printSize = i4;
    this.oneLength = i5;
    this.headName = str3;
    this.canChangeMTU = z;
    this.devdpi = i6;
    this.imgPrintSpeed = i7;
    this.textPrintSpeed = i8;
    this.imgMTU = i9;
    this.textMTU = i10;
    this.newCompress = z2;
    this.paperNum = i11;
    this.interval = i12;
    this.useSPP = z3;
    this.thinEneragy = i13;
    this.moderationEneragy = i14;
    this.deepenEneragy = i15;
    this.hasId = z4;
}

Some of these params are constants in this C1797R2 class, which is defined in src/main/java/com/frogtosea/iprint/C1797R2.java. This file is huge (around 15k lines), so I won't paste it here. Instead, you can find it in this gist.

[omgmog]

Some of these params are constants in this C1797R2 class, which is defined in src/main/java/com/frogtosea/iprint/C1797R2.java. This file is huge (around 15k lines), so I won't paste it here. Instead, you can find it in this gist.

It looks like these constants are just incrementing values, do they correspond to something else?

Also the second parameter in the DataBean object uses HanziToPinyin.Token.SEPARATOR which seems to just be " " (if this HanziToPinyin.java source is anything to go by.. 🤔 )

I can take a look at porting the DataBean getModel across to a devices method that will return a sort of DataBean tuple containing the params for a device, and then using those values in the methods in cmds.py based on the selected device.