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Engineering FAQ · Wanlin

Terminal concourse projects: Board Qualification

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Review Terminal concourse projects requirements, interfaces, software and acceptance scope. Confirm the exact model configuration against current controlled project documents.

Published configuration: confirm against controlled documents

The AS-RK3568-TQS-CUS carrier board is a 6-layer PCB in a 3.5-inch SBC form factor, industrial-grade components throughout, with conformal coating optional. The specifications below are the OEM/ODM default; every line is re-specable on request.

BlockSpecification
SoCRockchip RK3588 octa-core Cortex-A76/A55 up to 2.4GHz; RK3568 / RK3566 quad Cortex-A55; RK3399; RK3288 on the value tiers
NPURK3588 6 TOPS INT8; RK3568 1 TOPS; value tiers without NPU
GPURK3588 Mali-G610 MP4; RK3568 Mali-G52 2EE; used for composited map and notice layers
MemoryLPDDR4 / LPDDR4X / LPDDR5, 2GB to 16GB depending on tier
StorageeMMC 5.1 8GB / 16GB / 32GB / 64GB / 128GB; UFS 2.1 option; TF card; M.2 NVMe on the RK3588 carrier
DisplaySingle, dual or triple independent outputs: LVDS / eDP / MIPI DSI / HDMI; 1920x1080, 3840x2160 or 7680x4320 decode; independent or mirrored; portrait or landscape per output
TouchCapacitive 10-point / 20-point; IR touch option; glove and wet-hand profile; dual touch controllers on request
Query and printThermal receipt printer, A4 document printer, document feeder, flatbed scanner, card dispenser, signature pad; current-budgeted rails with isolated returns
Identity and paymentID card reader, bank card reader, passport reader, NFC reader, RFID reader, fingerprint reader, face recognition option, QR payment
AudioOn-board decode, amplifier control, speaker module, microphone input, per-desk volume, runtime multi-language voice packs
CameraMIPI CSI 2-lane / 4-lane with ISP, plus USB camera lane for document capture and service analytics
I/O4x USB 2.0, 2x USB 3.0, RS232 / RS485, up to 6 isolated serial ports, GPIO island up to 32 channels, relay, PWM, I2C, SPI, CAN bus
SecuritySecure boot chain, trusted execution environment, trusted platform module option, encryption module, session wipe on logout, signed audit trail
NetworkDual Gigabit Ethernet, PoE+ option, WiFi 5 / WiFi 6, Bluetooth 5.0, 4G LTE / 5G module, SIM slot, GPS option
OSAndroid 11 / 12 / 13 / 14 / 15; Linux; Ubuntu; Debian; Kylin OS; UOS; OpenHarmony; AOSP; GMS or GMS-free; kiosk mode; runtime locale packs
Power12V DC standard; wide-voltage 9-36V on request; PoE+ on request; hold-up capacitor for brownout ride-through; RTC wake and scheduled power profile
Thermal and reliabilityFanless 6-layer carrier; 0C to 50C standard, -20C to 70C wide temp; 46C glazed-hall rating; 24/7 duty; hardware watchdog; RTC backup; ESD and EMC design
Form factor3.5-inch SBC, Pico-ITX, Mini-ITX, or core board plus custom carrier; counter-top, pillar, floor-standing and wall-mounted enclosures

Application matrix: 8 customization scenarios for the AS-RK3568-TQS-CUS

The AS-RK3568-TQS-CUS is one carrier platform across eight different query terminal deployments. The matrix below shows the most common OEM/ODM customization angles a mall operator technology buyer in Southeast Asia walks through in the first scoping call.

ScenarioCatalog board limitAS-RK3568-TQS-CUS customization
Government information counter4.1 s first lookup, no offline indexCached department index, offline search mirror
Hospital enquiry desk3.3 s registration lookup, no audio pathLocal appointment index, on-board audio
Bank enquiry terminal3.9 s balance read, no secure elementSub-700 ms aggregated call, secure element
Mall directory and price check22 fps map, no fuzzy tenant searchGPU composited map, local fuzzy index
Airport and station wayfindingRemote render, no offline fallbackLocal mirror, offline wayfinding index
Dual-screen enquiry plus noticeMirrored output, 340 ms driftTwo framebuffers, per-panel proof-of-play
Certificate and document printingPrinter brownout, no signature laneBudgeted print rails, on-board pad lane
Multi-platform query familyFour carriers, two contractsOne enclosure, one BSP train, one MOQ

OEM/ODM workflow: 8 steps from kickoff to first article

Below is the actual OEM/ODM workflow a mall operator technology buyer in Surabaya walks through when commissioning a custom self-service query terminal Android motherboard from AndroidSBC. No step is a placeholder.

  1. Day 0-2 — Requirements intake. A 90-minute call captures the desk format, the I/O map, the language list, the OS choice, the query workflow, the print and reader peripherals and the volume profile. Output: a one-page requirements sheet.
  2. Day 3-6 — Feasibility study. AndroidSBC engineers validate the SoC choice (RK3588, RK3568, RK3566, RK3399 or RK3288), the carrier I/O map, the BSP availability, the certification gap and the thermal envelope. Output: a feasibility report with go / no-go on each customization.
  3. Day 7-10 — Schematic and PCB layout. The AS-RK3568-TQS-CUS carrier board is laid out on a 6-layer stack-up with the customer's I/O map. Output: schematic and PCB review package.
  4. Day 11-14 — BSP porting. Android, Linux, Ubuntu, Debian, Kylin OS, UOS or OpenHarmony BSP is ported to the customer's OS choice, with PREEMPT_RT patches, kiosk-mode locking, secure boot, offline index support and runtime locale packs where needed. Output: a BSP build for the customer's evaluation team.
  5. Day 15-18 — Sample fabrication. Five to ten engineering samples are fabricated at the Shenzhen source factory, with conformal coating and stencil rework as required. Output: samples shipped to the customer by air.
  6. Day 19-21 — Customer evaluation. The customer's evaluation team runs thermal, EMC, query latency, print, touch calibration and field-replication tests. Output: an evaluation report with sign-off or change requests.
  7. Day 22-23 — Design freeze and mass-production tooling. Any change requests are absorbed, the design is frozen, and mass-production tooling is opened at the source factory. Output: a frozen Gerber and a frozen BOM.

Twenty-eight days from kickoff to first article. Ninety days from kickoff to mass production. This is the OEM/ODM rhythm that the mall operator technology buyer in Southeast Asia learns to expect from a Shenzhen source factory that does this work for a living.

Frequently asked questions

What is the MOQ for a custom self-service query terminal Android motherboard?
Answer: 150 units for OEM (a re-spin of an existing carrier board), 500 units for ODM (a from-scratch PCB layout). Sample orders of five units are accepted with an engineering report.

How long does OEM/ODM customization take from kickoff to first article?
Answer: 28 days on the workflow described above, including schematic, PCB layout, BSP porting, sample fabrication and customer evaluation. Mass production starts around day 90.

Should I choose RK3588 or RK3568 for a query terminal?
Answer: RK3588 for dual-screen enquiry plus notice pillars, GPU composited wayfinding maps and multi-camera people analytics; RK3568 for government counters, hospital enquiry desks, bank enquiry terminals, printing counters and station wayfinding pillars where 1 TOPS and 4K dual display are sufficient; RK3566 for cost-driven single-screen enquiry tiers. AndroidSBC builds all of them on the same enclosure cut-out.

Can the terminal answer a query when the network is down?
Answer: Yes. A cached department or tenant index plus an offline search mirror keeps the enquiry desk answering questions through a patch window or a link outage, with no greyed-out search box.

Can one carrier drive the enquiry result and a second information feed?
Answer: Yes. Two independent framebuffers give per-panel resolution, refresh and rotation, so the wayfinding half keeps running while the notice half updates, with per-panel proof-of-play logs.

Can the board print a certificate and read an ID card at once?
Answer: Yes. The printer rail is current-budgeted with soft-start sequencing, the reader sits on an isolated rail, and the print job is signed and logged even if power drops mid-page.

Is there an on-board signature pad lane?
Answer: Yes. The carrier exposes a signature pad lane with pen vector capture, so the desk does not need a separate signing tablet and second PC.

Do you support multi-language enquiry interfaces?
Answer: Yes. Runtime locale packs are selected per desk with no per-language re-spin of the firmware image, including right-to-left layouts where the market requires them.

What certifications can you pre-scope for our market?
Answer: CE / FCC / RoHS standard. UL / UKCA / KC / PSE / SAA, GMS / Google EDLA and payment pre-scoping are all available on request. EMC pre-scanning is done in-house before third-party testing.

Do you accept sample and small-batch orders?
Answer: Yes. Samples ship in 1-3 days from stock where available; custom samples ship inside the 15-18 day window. Small-batch and large-volume pricing is available on request.