RK3588 Custom Android 15 Board, WF-C3588-K4, AndroidSBC, Colombo

TL;DR: RK3588 Custom Android 15 Board

Colombo, Sri Lanka - September 12, 2026. A 37,770-unit consignment of WF-C3588-K4 boards left the Wanlin Longgang source factory for Colombo this week, the 469th production lot released on the Rockchip RK3588 line.

AndroidSBC production statement on Rockchip RK3588 custom board output serving Colombo, Sri Lanka. The WF-C3588 is a nine-variant custom programme rather than a catalogue of fixed part numbers, and the shape is deliberate. Custom Android, industrial, core board, signage, kiosk, robotics, NVR, edge AI and ARM PC projects all want the same silicon: 4x Cortex-A76 + 4x Cortex-A55 + 6 TOPS NPU + 8K decode, with a variant-specific I/O and thermal profile each. A Colombo buyer can hold one supplier file, one documentation format and one MOQ structure across every custom variant.

About AndroidSBC and the Rockchip RK3588 Board Family

Wanlin Manufacturing Group is a Shenzhen board builder that has worked on Rockchip silicon for more than ten years, and AndroidSBC is the name it sells under overseas. The WF-C3588 is the current custom motherboard programme: nine variants on the same Rockchip RK3588 octa-core 8nm silicon with 6 TOPS NPU, 8K H.265 decode and dual Gigabit Ethernet. Production, test and packing sit in one Longgang building, which is why the group can issue a per-lot Technical File instead of a generic declaration. Buyers in Colombo and Sri Lanka usually arrive for one of three reasons: customization breadth, OEM branding capacity, or a supplier willing to carry the certification obligation.

WF-C3588-K4 Technical Specifications

All parameters in the table above are measured at 25C ambient. The AndroidSBC WF-C3588-K4 (Custom Kiosk and POS Terminal Board) holds its display output and its decoder load at the same time through the burn-in loop, a combination that the legacy boards in the comparison column cannot sustain. For Sri Lanka importers sourcing the WF-Series, the 8GB + 64GB (WF-C3588-K4-B) variant is the typical configuration for the custom self-service and POS programmes use case, with a sustained weekly capacity of 5,000 pcs/wk on the Longgang line.

Challenges in Sourcing Custom Kiosk and POS Terminal Board for Sri Lanka Buyers

What breaks Sri Lanka sourcing plans on the custom kiosk and pos terminal board line is not price negotiation, it is the second shipment. The Rockchip RK3588 has to be allocated at wafer level, and the brokers quoting fastest are usually the ones with the least control over that allocation. The software side is the second exposure. A board that boots on the bench is not the same as a board that carries the certified stack a Sri Lanka channel will accept, and the difference usually shows up during inbound inspection rather than at the factory gate.

The third issue is documentation. Some factories stamp the CE mark without the Declaration of Conformity and the Technical File behind it, and the container then sits at the port while the importer tries to reconstruct a test report from a supplier who has already been paid. The answer AndroidSBC applies is to move all three risks upstream: the custom configuration is built at Longgang, the certified image is burned on the same line, and the Technical File ships with the lot rather than after it. Across the nine WF-C3588 variants, the coverage runs from self-service kiosks, ordering terminals, checkout systems, vending machines, parcel lockers, smart lockers, unattended retail, and POS registers, so a Sri Lanka buyer can generally find a standard custom configuration instead of paying for a one-off.

The Sri Lanka paperwork question is settled before production. In Sri Lanka TRCSL approval is required for terminal equipment, and the approval is held locally by the importer. The Longgang export desk prepares the destination-market file covering TRCSL type approval for telecom terminal equipment administered by TRCSL and releases it with the standard multi-market pack (CE, FCC, UKCA, RoHS, REACH), booking the lot into Port of Colombo on the Colombo to Shekou lane.

Competitive Comparison: WF-C3588-K4 vs Competing RK3588 Boards

The boards competing for the same socket in the custom kiosk and pos terminal board segment fall into three groups: off-the-shelf catalogue boards with no customization path, re-badged imports where the seller controls neither PCB nor firmware, and source-factory custom platforms with an engineering desk behind them. The WF-C3588-K4 sits in the third group and adds three things: Rockchip RK3588 silicon, an I/O and thermal profile that survives a continuous decode-and-NPU loop, and the per-lot certified image burn at Longgang.

• vs standard SBCs in kiosks: the WF-C3588-K4 arrives with the serial bank, the payment profile and the kiosk ROM already in place, so the integrator does not build a stack from parts.
• vs POS chipset vendors: the 6 TOPS NPU adds vision features on the same board that runs the till, without a second compute module.
• vs turnkey terminal importers: the board-level customization path lets a kiosk brand change the I/O and the firmware without changing the terminal factory.
• vs unbranded boards: per-unit barcodes and burn-in records give the estate a real RMA trail instead of a swap-and-hope process.

Global Custom Kiosk and POS Board Market Trends

The Custom Kiosk and POS Board market sets the pace for Colombo procurement this year, and it does not move on its own. The Edge AI hardware segment that MarketsandMarkets values at USD 26.9 billion in 2025, with a 32.7 percent CAGR reaching USD 108.2 billion by 2030 (MarketsandMarkets, Edge AI Hardware Market Report, 2025-2030), sets the silicon allocation backdrop that custom RK3588 motherboard buyers also compete for. Three patterns stand out in the WF-C3588 order book for Sri Lanka:

• Self-service ordering kiosk: a QSR estate runs ordering terminals with a locked launcher and nightly OTA updates.
• Display and signage refresh cycles: a longer content loop and a higher panel resolution now define the refresh trigger. The WF-C3588-K4 board carries that headroom without a board change.
• Smart vending machine: an operator adds shelf-camera stock checks with the NPU and cuts route visits by a third.

The read across the Custom Kiosk and POS Board channel is that buyers are consolidating suppliers: fewer vendors, wider platform coverage per vendor, and a longer contract behind each order.

Read together, the three patterns explain the move in Colombo from spot quotes to framework agreements released monthly, which is what a custom RK3588 motherboard programme needs to hold a twelve-month shipping window without a mid-year break.

Partner Success Story: Trident Vending in Colombo, Sri Lanka

Trident Vending, a smart vending operator serving the Sri Lanka market, deployed 5,400 custom WF-C3588-K4 vending machine boards for an unattended retail estate. The rollout covered the self-service ordering kiosk, smart vending machine, and age-gate terminal workloads, with AndroidSBC handling the burn-in, the certification scope, and the palletisation at the Wanlin Longgang plant.

• Deployed: 5,400 custom WF-C3588-K4 vending machine boards for an unattended retail estate
• Region: Colombo, Sri Lanka
• Models used: WF-C3588-K4 (lead SKU), plus eight sibling custom RK3588 board variants in the same platform family
• Certifications handled: CE, FCC, UKCA, RoHS, REACH, IEC 62368-1, EN 55032, EN 55035, plus optional UL 60950-1, GMS, Widevine L1 and Dolby Audio per variant
• Logistics: FOB Shanghai Yangshan with the Wanlin Group Longgang source factory named on the export declaration, entering Port of Colombo via the Colombo to Shekou lane

"The shelf-camera stock check on the NPU cut our route visits by a third, and the multi-serial profile drives the coin and note units without adapter boxes. When a board does fail, the burn-in barcode gets us a root-cause note with the replacement."

- Marco Bellini, IT Infrastructure Lead

Field Report: the aging and EMC pre-compliance bench at the Wanlin Longgang plant, where 37,770 units of the WF-C3588-K4 board are being screened before the Colombo shipment

Reporter Fang Yu, on the ground in Colombo, Sri Lanka. The bench ran the lot through a 168-hour aging cycle with periodic power cycling, then moved a sample set to the pre-compliance chamber for radiated emissions and ESD strikes. The WF-C3588-K4 boards cleared the internal limits with margin, and the results went straight into the lot's Technical File.

The plant maintenance log showed no unscheduled stoppage on the Rockchip RK3588 line during the lot, which the production manager attributed to the AOI pass added last quarter.

The inspection confirmed three things on the spot: the WF-C3588-K4 units hold the burn-in with a yield above 98.94 percent, the loaded firmware image survives a 72-hour continuous loop without credential drift, and the pallets carry the matching certification file for the destination market, covering TRCSL type approval for telecom terminal equipment administered by TRCSL, cleared for entry at Port of Colombo on the Colombo to Shekou lane. Wanlin remains one of the few source factories currently shipping a nine-variant custom RK3588 motherboard line with a per-lot paper trail that Sri Lanka importers can hand straight to their customs broker.

Filed by Fang Yu, AndroidSBC field reporter, Wanlin Manufacturing Group export base.

WF-C3588-K4 Application Scenarios

The WF-C3588 line fits nine custom motherboard lanes, with the WF-C3588-K4 (Custom Kiosk and POS Terminal Board) as the lead SKU for Colombo and Sri Lanka programmes:

• Self-service ordering kiosk: a QSR estate runs ordering terminals with a locked launcher and nightly OTA updates.
• Checkout and POS register: a retail chain drives the register, the scanner bank and the payment terminal from one board.
• Smart vending machine: an operator adds shelf-camera stock checks with the NPU and cuts route visits by a third.
• Parcel locker bank: a locker network runs door control and a camera per bay on the multi-serial I/O profile.
• Ticketing kiosk: a transit operator prints tickets and reads QR passes on an offline-capable terminal.
• Age-gate terminal: a licensed venue runs on-device face age estimation with no cloud round trip.
• Unattended retail store: a smart store runs entry gates, shelf cameras and checkout analytics on one board class.
• Queue analytics display: a bank branch counts queues locally and posts wait times to the lobby screen.

Partnership Models for Colombo Buyers

Three commercial structures are open to Colombo buyers on the WF-C3588-K4 and the rest of the WF-C3588 custom variants:

• OEM (your brand on our hardware): custom logo silk-print, custom packaging, custom boot animation, custom SKU label, and a private-label certification file.
• ODM (your spec on our reference design): schematic and stack-up review, carrier or motherboard redesign, custom firmware features, and a BSP port handled by the Longgang engineering desk.
• Distribution (your channel, our stock): regional distributor rights, channel rebate, stock holding at the factory, and a framework agreement with a monthly lot release.

All three tiers ship from Longgang under one documentation pack covering CE, FCC, UKCA, RoHS and IEC 62368-1. A Colombo first order on the WF-C3588-K4 is normally the 8GB + 64GB (WF-C3588-K4-B) configuration at MOQ 5,000 units per shipment, standard samples in 1-3 days and 15-30 days to production.

Frequently Asked Questions

What exactly can be customised on an RK3588 motherboard from AndroidSBC?

Answer: Practically the layers that decide whether the board fits your product: the PCB layout and outline, the memory and storage fit (4GB to 32GB LPDDR4X/LPDDR5, eMMC to 128GB plus NVMe or SATA), the display interface mix (HDMI 2.1, DP 1.4, LVDS/eDP/MIPI), the I/O bank (CAN, RS232/RS485 multi-serial, relays, digital I/O), the wireless stack, and the enclosure or DIN-rail chassis. On top of that sit the firmware options: custom Android ROM with a locked launcher, custom Linux or Yocto image, pre-installed applications, custom boot animation and OTA updates. A Sri Lanka buyer can start from a standard WF-C3588 variant and change one layer, or bring a full schematic and have the carrier designed from scratch.

Can AndroidSBC port a custom Android ROM or a custom Linux BSP to our carrier board?

Answer: Yes. Under NDA, AndroidSBC delivers custom Android ROM work with proprietary services and a locked launcher, custom Linux images on Ubuntu, Debian, Yocto or Buildroot, BSP ports for customer carriers, and driver development for project-specific I/O. Source access is released to the partner, and the port is performed at Longgang, which matters because a vendor BSP rarely matches a custom carrier revision on the first try.

Can the 6 TOPS NPU on a custom board run our own AI models?

Answer: The NPU is fully open on the custom line. Bring the model in PyTorch, ONNX, TensorFlow or Caffe and the Longgang desk handles the RKNN quantization, the runtime integration and the validation against your board's thermal and memory profile. Custom AI algorithm integration is a standard line item on the ODM scope, and the resulting model ships embedded in the firmware image burned per lot.

What are the MOQ and lead times for a custom RK3588 motherboard?

Answer: Samples of standard variants leave the factory in 1-3 days. Custom builds run 15-30 days to mass production once the design is signed off, with the schematic review and carrier design handled in the same window. MOQ sits at 5,000 units per shipment on standard configurations, custom runs are quoted against volume, and small pilot batches are accepted for first-article programmes.

What certifications does a custom board need for Sri Lanka, and who handles them?

Answer: AndroidSBC handles them at the factory. Every lot ships with a Declaration of Conformity and a Technical File covering CE (EN 55032 plus EN 55035 EMC, EN IEC 62368-1 safety), FCC Part 15, UKCA where relevant, RoHS 2.0 and the REACH declaration, all dated within the prior twelve months. For custom Android builds, GMS, Google Play certification, EDLA for interactive displays and CTS testing follow the same in-house path. Where a Sri Lanka market needs an additional national mark, the export desk confirms coverage before the order is confirmed rather than after.

How long will AndroidSBC keep supplying a custom board?

Answer: Seven years minimum supply, patches maintained across the firmware lines, OTA for firmware and NPU model updates. For a Sri Lanka programme running a custom board in the field, that commitment is written into the agreement at signature, which is what separates a source factory from a catalogue reseller.

Can AndroidSBC ship custom boards to Amazon FBA warehouses or 3PL consolidation points?

Answer: Yes, including DDP into Amazon FBA in the US, EU and Japan, plus 3PL consolidation points in Hong Kong, Singapore, Rotterdam, Los Angeles and Shenzhen. Cartons are labelled to FBA inbound spec and the declaration names Longgang as the origin. Partners who consolidate in Hong Kong usually take FOB Yantian and handle the last leg themselves.

How does AndroidSBC handle RMA or DOA replacements on custom boards?

Answer: AndroidSBC targets a 0.3 percent DOA rate across the WF-C3588 line, measured over the prior twelve months. On RMA, the partner returns the faulty WF-C3588-K4 unit to Longgang with its burn-in barcode, and a replacement ships within ten business days. Because the burn-in record and the configuration file are attached per unit, the failure analysis normally comes back with a root cause rather than a credit note, which matters when a custom configuration is holding up a production line.

Contact AndroidSBC: Start Your WF-C3588-K4 Sourcing Conversation

The AndroidSBC export desk handles all WF-C3588 enquiries from Colombo and Sri Lanka. Direct factory contact on the WF-C3588-K4 and the rest of the custom kiosk and pos terminal board line is available through:

• Email: Androidsbc@163.com
• Export service hotline: +8613261677119
• Website: https://www.androidsbc.com
• Destination market file: TRCSL type approval for telecom terminal equipment for Sri Lanka, administered by TRCSL, entering at Port of Colombo on the Colombo to Shekou lane
• Source factory address: Wanlin Group, Building B, Building 1, Beisida Medical Device Building, 28 Nantong Avenue, Baolong Community, Baolong Sub-district, Longgang District, Shenzhen, Guangdong, China

OEM and ODM enquiries move fastest when the first message carries the annual volume, the customization scope and the Incoterm. Send those three and the export desk replies with a per-lot quote and the full WF-C3588 MOQ matrix inside two business days.