Question

我已经为此苦苦挣扎了一段时间。

我正在尝试使用ESC / POS命令直接打印到热敏打印机。

我正在使用node-printer模块从node发送数据：

https://www.npmjs.com/package/printer

或ipp模块

https://www.npmjs.com/package/ipp

两者都给我完全相同的行为，这就是我发送的前几个命令似乎被完全忽略了。

为了进行测试，我使用了本教程中的命令：

https://www.neodynamic.com/articles/How-to-print-raw-ESC-POS-commands-from-Javascript/

例如，在我的节点程序中，我可以拥有：

stop_words = ["and","lang","naman","the","sa","ko","na",
              "yan","n","yang","mo","ung","ang","ako","ng",
              "ndi","pag","ba","on","un","Me","at","to",
              "is","sia","kaya","I","s","sla","dun","po","b","pro"
             ]

newdata = pd.DataFrame({'Verbatim':['I love my lang','the boss come to me']})

pat = '|'.join(r"\b{}\b".format(x) for x in stop_words)
newdata['Verbatim1'] = newdata['Verbatim'].str.replace(pat, '')


top_words = set(stop_words)
f = lambda x: ' '.join(w for w in x.split() if not w in stop_words)
newdata['Verbatim2'] = newdata['Verbatim'].apply(f)

print (newdata)
              Verbatim       Verbatim1     Verbatim2
0       I love my lang        love my        love my
1  the boss come to me   boss come  me  boss come me

然后将这些命令直接发送到打印机。使用node-printer（直接取自他们的print_raw示例）：

        let esc = '\x1B'; //ESC byte in hex notation
        let newLine = '\x0A'; //LF byte in hex notation

        let cmds = esc + "@"; //Initializes the printer (ESC @)
        cmds += esc + '!' + '\x38'; //Emphasized + Double-height + Double-width mode selected (ESC ! (8 + 16 + 32)) 56 dec => 38 hex
        cmds += 'BEST DEAL STORES'; //text to print
        cmds += newLine + newLine;
        cmds += esc + '!' + '\x00'; //Character font A selected (ESC ! 0)
        cmds += 'COOKIES                   5.00'; 
        cmds += newLine;
        cmds += 'MILK 65 Fl oz             3.78';
        cmds += newLine + newLine;
        cmds += 'SUBTOTAL                  8.78';
        cmds += newLine;
        cmds += 'TAX 5%                    0.44';
        cmds += newLine;
        cmds += 'TOTAL                     9.22';
        cmds += newLine;
        cmds += 'CASH TEND                10.00';
        cmds += newLine;
        cmds += 'CASH DUE                  0.78';
        cmds += newLine + newLine;
        cmds += esc + '!' + '\x18'; //Emphasized + Double-height mode selected (ESC ! (16 + 8)) 24 dec => 18 hex
        cmds += '# ITEMS SOLD 2';
        cmds += esc + '!' + '\x00'; //Character font A selected (ESC ! 0)
        cmds += newLine + newLine;
        cmds += '11/03/13  19:53:17';

或使用ipp：

let printer = require("printer");
this.printer.printDirect({data: cmds
    , type: 'RAW' // type: RAW, TEXT, PDF, JPEG, .. depends on platform
    , success:function(jobID: any){
        console.log("sent to printer with ID: "+jobID);
     }
    , error:function(err: any){console.log(err);}
});

由于这两种技术，出于某种原因，打印仅从“ FL oz”（假收据上的牛奶项目）开始。之前的所有命令（包括对齐或字体选择）都将被完全忽略。

现在，如果我在此之前添加一堆命令，则使用类似的

const ipp = require('ipp');
const uri = "ipp://localhost/printers/myPrinter";

let msg = {
       "operation-attributes-tag": {
       "requesting-user-name": "William",
       "job-name": "My Test Job",
       "document-format": "text/plain"
    },
    data: new Buffer(cmds)
};

const rawPrinter = ipp.Printer(uri);
rawPrinter.execute("Print-Job", msg, function(err: any, res: any){
    console.log(res);
});

然后我将整个收据打印出来。但是，这感觉让人感到恐惧，几乎肯定会再次困扰我。我还需要发送其他信息给打印机以使其从头开始读取命令吗？也许我需要以更好的方式格式化命令？

我正在Ubuntu上运行此打印机，并且该打印机是Bixolon热敏打印机350III，其命令可以在此处找到：

http://www.bixolon.com/upload/download/unified%20command%20manual_rev_1_01.pdf

很显然，我对此很陌生，我非常希望我缺少明显的东西。

ESC / POS打印忽略前几个命令。使用nodeJS

0 个答案: