77 lines
2.2 KiB
Markdown
77 lines
2.2 KiB
Markdown
Provide a JSON REST API to `ESC/POS` printers. Most of the time these printers will be thermal printers.
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# Usage
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GET `/api/printer/name` to get the UUID of the printer.
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GET `/api/printer/status` to get information about the current state of the printer.
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To actually print something use POST `/api/printer/print`. The body is an JSON array of print instructions. Following instructions are available.
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## Feed
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`lines` and `dots` can be used at the same time.
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```json
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{
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"type":"feed",
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"lines":4,
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"dots":50
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}
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```
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## Text
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Only `text` is required.
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`alignment`: Can be `Right`,`Left`,`Center`. Default is `Left`.
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`underline`,`bold`,`doubleHeight`,`doubleWidth` are obvious and default to `false`.
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`fontB`: Use different font. Based on printer model. Default is `false`.
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`lineSpacing`: Line spacings in dots. Default is unset.
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`newLine`: Insert a new line after printing the text. Default is `true`.
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```json
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{
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"type":"text",
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"text":"Hello world",
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"alignment":"Center",
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"underline": false,
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"bold": false,
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"doubleHeight":false,
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"doubleWidth":false,
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"fontB":false,
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"lineSpacing":23,
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"newLine":true
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}
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```
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## Barcode
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`barcode`: Value of the barcode. Depending on the `barcodeType` it may only contain numeric characters. Require.
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`barcodeType`: What type of barcode. Possible values are: `CODE128`, `UPC_A`,`UPC_E`,`JAN13_EAN13`,`JAN8_EAN8`,`CODE39`,`ITF`,`CODABAR_NW_7`,`CODE93`,`GS1_128`,`GS1_DATABAR_OMNIDIRECTIONAL`, `GS1_DATABAR_TRUNCATED`,`GS1_DATABAR_LIMITED`,`GS1_DATABAR_EXPANDED`. Default is `CODE128`. Depending on the printer modell not all types are supported.
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`barcodeCode`: I honestly have no idea what exactly this changes. But it changes something. Default is `CODE_B`.
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`alignment`: Just like `alignment` in the "Text" instruction.
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`labelPos`: Position of the value of the barcode in text form. Possible values are : `None`, `Above`, `Below`, `Both`. Default is `Below`.
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`height`: Height of the barcode in dots. Default is unset.
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```json
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{
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"type":"barcode",
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"barcode":"348234445AA",
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"barcodeType":"CODE128",
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"barcodeCode":"CODE_B",
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"alignment":"Center",
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"labelPos":"None",
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"height":45,
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}
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```
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