PC Printer Driver

The PC printer driver is a local Windows service for Plato POS printing. It accepts print jobs over HTTP, stores them in Redis-backed BullMQ queues, and writes ESC/POS bytes to network thermal printers over TCP. It is not an operating-system printer driver. It is a small local bridge between Plato’s browser POS and raw ESC/POS printers.

What It Does

Receives print jobs from Plato Console through POST /print.
Converts incoming base64 ESC/POS raster chunks into queued printer jobs.
Keeps a separate queue per printer address.
Processes one job at a time per printer.
Sends raw ESC/POS bytes to TCP printers.
Supports printer status checks, cash drawer kick, beep commands, queue inspection, HTTPS proxying, and PeerJS mesh signaling.

Runtime Shape

Plato POS browser
  |
  | POST /print
  v
PC printer HTTP server
  |
  | build print chunks
  v
PrinterStores
  |
  | one BullMQ queue per ip:port
  v
PrinterStore worker
  |
  | TCP socket
  v
ESC/POS thermal printer

Main Files

File	Role
`drivers/pc-printer/src/index.ts`	Express app, CORS, startup, HTTPS, mesh server, shutdown handlers.
`drivers/pc-printer/src/routes.ts`	HTTP endpoints for print, status, beep, cash drawer, health, and queue state.
`drivers/pc-printer/src/printer-stores.ts`	Per-printer queue, worker, socket lifecycle, status probing, retry recovery.
`drivers/pc-printer/src/printer.ts`	Low-level TCP writes, write timeout, printer init command, local IP discovery.
`drivers/pc-printer/src/lib/config.ts`	`config.json` defaults, parsing, and sanitization.
`drivers/pc-printer/src/lib/redis.ts`	Embedded or external Redis runtime.
`drivers/pc-printer/src/lib/receipt-encoder.ts`	ESC/POS chunk wrapping, cut, beep, and cash drawer commands.
`drivers/pc-printer/src/scripts/*`	Caddy HTTPS setup and release helpers.

Network Ports

Port	Default	Used For
`server.port`	`8080`	Main HTTP API.
`caddy.httpsPort`	`443`	HTTPS reverse proxy when enabled.
`redis.port`	`6379`	Embedded or external Redis.
Printer port	Usually `9100`	Raw TCP connection to the printer.

Capabilities

Network printers that accept ESC/POS over TCP.
Raster print jobs generated by Plato Console.
Deferred print jobs through runAt.
Persistent retry queues.
Cash drawer pulse through ESC/POS.
Repeated beep sequence.
HTTPS through Caddy on Windows.
PeerJS mesh signaling on /mesh.

Point Of Sale (POS)

Kitchen Display (KDS)

Device Setup

Drivers & Downloads

PC Printer Driver

PC Printer Driver

What It Does

Runtime Shape

Main Files

Network Ports

Capabilities

​PC Printer Driver

​What It Does

​Runtime Shape

​Main Files

​Network Ports

​Capabilities

PC Printer Driver

What It Does

Runtime Shape

Main Files

Network Ports

Capabilities