Android POS System DCA-155A

Android at the Till: What You Gain and What You Give Up

An Android POS terminal is not a cheaper Windows terminal. It is a different platform with a different app model, a different support story and a different set of limits — and the choice between them is usually decided by the software, not the hardware.

The DCA-155A is the Android side of that choice: a 15.6-inch G+G capacitive touchscreen on a Rockchip RK3566 or RK3568, 2 GB DDR4 with a 4 GB option, 16 GB eMMC, Android 11, in a plastic body on an aluminium base.

Why Android, and Where It Stops

The gains are real:

• No operating system licence. On a Windows terminal the OS is a per-unit cost that recurs with every deployment. On a fleet of fifty, that is a meaningful part of the bill of materials.
• Remote management. Android has a mature device-management model. An MDM can push an app, lock the device to a kiosk mode, wipe it, and report its state without anyone visiting the site.
• App distribution. Web-based POS applications, React Native and Flutter apps, and Android-native apps all run. A vendor that ships an Android app can deploy it without a Windows installer.
• Power and heat. An ARM SoC draws a fraction of what an x86 platform does, which is why these units run quietly and cool and why the same chassis can be built smaller.

The limits are equally real:

• Windows-only software does not run. If the POS application is a Windows executable — and a very large share of installed retail software still is — the terminal is the wrong choice regardless of the hardware.
• Peripheral drivers are the risk. An Android POS SDK is required for a printer, a cash drawer, a scale or a customer display. Before ordering, confirm the SDK supports the exact peripherals on the site, not just the model family.
• Multitasking is not a strength. 2 GB of DDR4 runs one POS app comfortably. It does not run a POS app, a browser, a spreadsheet and a back-office tool at the same time.

RK3566 or RK3568: The Difference Is 1.8 GHz Versus 2.0 GHz

Both are quad-core ARM Cortex-A55 parts; the RK3568 runs at 2.0 GHz against the RK3566’s 1.8 GHz. On a POS workload — a product grid, a cart, a printer driver, a network sync — the practical difference is responsiveness on heavy screens: a large catalogue, a busy table map, a report preview.

Both support the same I/O layout on the RK3568 configuration: power button, 12 V DC input, one RJ45, four USB, one 15-pin VGA, one RS232, line out and mic in. That is a workable peripheral set for a till: printer and drawer on USB or serial, scanner on USB, and a second monitor on VGA if needed.

Memory is 2 GB DDR4 with a 4 GB option, storage 16 GB eMMC with a 32 GB option, plus a TF card slot for expansion up to 128 GB. If the deployment stores product images, video or a large local catalogue, take the 32 GB option — eMMC fills faster than buyers expect, and an Android device with a full data partition behaves badly rather than gracefully.

100 Mbps LAN: An Honest Limit

The LAN is 10/100 Mbps on a Realtek RTL8111F, with an embedded Wi-Fi module supported through the Mini-PCIe slot.

100 Mbps is not a defect at a till — a POS sends and receives kilobytes per transaction, and a cloud sync of a day’s sales is a few megabytes. It matters in exactly three situations, and they are worth checking before specifying:

• Local video or large image sync. Menu boards, product photography, training video — anything measured in gigabytes will crawl.
• A shared network with heavy local traffic. A 100 Mbps port saturates on a busy segment.
• Future-proofing a multi-year deployment. Gigabit costs very little more and removes the question.

If none of those apply, 100 Mbps is fine and the honest answer is that it is fine. We would rather say so than let a buyer discover the limit during a rollout.

The Display and the Second Screen

The main screen is 15.6 inches at 1366 × 768 or 1920 × 1080, 250 cd/m², with a horizontal viewing angle of 150° and vertical 140°, under multi-point projected G+G capacitive touch. G+G means glass-on-glass: a glass touch layer bonded to a glass cover, which is more durable and optically clearer than film-based alternatives, and less prone to the delamination that film sensors suffer in a counter that gets wiped daily.

A sub-display is available as a 15.6-inch or 12.1-inch non-touch panel for a dual-screen configuration, and a customer display can be specified as 2 × 20 VFD or 2 × 20 LCD mounted to the back cover.

The distinction matters: a sub-display is a full second screen driven by the video output, which can show anything the software renders. A 2 × 20 customer display shows only characters, driven by a display protocol. Choose the sub-display if the customer needs to see product names and a logo; choose the VFD or LCD character display if a total and a line item are enough.

Physical and Power

Plastic shell on an aluminium base, all black, with an optional side MSR. Net weight 6.5 kg, gross 8.0 kg for the single-screen configuration, packed in foam at 425 × 275 × 405 mm (440 × 295 × 425 mm for dual screen).

Power is an external 110–240 V adapter with DC 12 V / 5 A output, and the mains cable is available for US, EU and UK plugs or a custom type. Operating range is 0–40 °C at 10–80% RH non-condensing — a normal indoor retail envelope, not an outdoor or unventilated-kitchen one.

Where the DCA-155A Fits

• Retail and hospitality tills with an Android or web POS app. The core case.
• Fleets managed remotely. MDM deployment, kiosk mode, no Windows licence per unit.
• Sites needing a second customer-facing screen. 15.6 or 12.1-inch sub-display, or a VFD character display.
• Table-service and counter-service formats. 15.6-inch touch with a wide viewing angle.
• Not where the POS software is a Windows executable. The DCA-155W is the Windows terminal on the same chassis design.
• Not where a receipt printer must be inside the terminal. The DCA-KSA has a built-in 58 or 80 mm printer.

The All-in-One Range

• DCA-155A — this unit. 15.6-inch Android, RK3566/RK3568, 2–4 GB RAM, sub-display options.
• DCA-155W — 15/15.6-inch Windows terminal, J1900/J4125/i3/i5, two RS232 ports.
• DCA-KSA — 15.6-inch with a built-in 58 or 80 mm printer, scanner and NFC options.
• DCA-151WS, DCA-152W — 15-inch chassis variants including a foldable-stand format.

Frequently Asked Questions

Can it run Windows software?

No. It is an Android 11 device. If the POS application is a Windows executable, specify the DCA-155W instead.

Which processor should I choose?

RK3568 at 2.0 GHz for heavier screens and a larger catalogue; RK3566 at 1.8 GHz is adequate for a standard till workload.

Is 2 GB of RAM enough?

For one POS app, yes. The 4 GB option is worth taking if the app is web-based, uses a large local catalogue, or if more than one app runs at once.

Does it have a customer display?

Yes as an option — a 15.6 or 12.1-inch sub-display, or a 2 × 20 VFD or LCD character display on the back cover.

Can it drive a cash drawer?

Through the printer’s drawer port, or over USB or serial depending on the drawer model. Confirm the wiring at order.

What is the warranty?

12 months minimum. OEM branding, colour, pre-installed app and MDM provisioning are available — ask at quotation stage.

Next step: tell us the POS application and its platform, the peripherals on the site and whether a customer display is needed — we will confirm the configuration and quote factory-direct. Email sales@dcapos.com or contact us.

Related: DCA-156A 15.6-inch Android POS · POS systems · DCA-155W Windows terminal · DCA-KSA with built-in printer · all products