Code 128
Code 128 is a compact, variable-length linear barcode symbology, developed in 1981 and standardized as ISO/IEC 15417. It is used extensively in logistics, healthcare, transportation, and the most widely used 1D symbology outside of retail.
A sample Code 128 barcode is shown below.
Symbology Characteristics
Configuration name |
|
ISO specification | ISO/IEC 15417:2007 |
Encodable character set | All 128 ISO/IEC 646 (ASCII) characters, i.e. characters 0 to 127 inclusive, and characters with byte values 128-255 |
Integrity protection | Mandatory checksum character |
Quiet zone | Leading and trailing quiet zone of ten modules (10X) is required |
Configuration Options
Option | Description | Sample Configuration | Default |
|---|---|---|---|
minLen | The minimum length of scanned codes |
const config = {
engine: {
symbologies: [
{ name: "code128", minLen: 8 }
]
}
}
| 4 |
maxLen | The maximum length of scanned codes |
const config = {
engine: {
symbologies: [
{ name: "code128", maxLen: 16 }
]
}
}
| 32 |
qz | The minimum size of the quiet zone, in modules (X) |
const config = {
engine: {
symbologies: [
{ name: "code128", qz: 10 }
]
}
}
| 5 |
GS1-128 (formerly UCC/EAN-128)
GS1-128 is a subset of a Code 128 which encodes structured information in Application Identifiers (AIs), such as a GTIN, a lot number, etc.
For example, the GS1-128 barcode below encodes a GTIN 40614141006364, a production date 220101 (YYMMDD) in AI 11 of and a batch or lot number A1B2C3D4 in AI 10.
