Robot T440
Top-tier vehicle terminal and enterprise Wi-Fi roaming.
The T440 is the flagship of the vehicle-mounted Robot range, extending the T430 with Wifi roaming connectivity. Engineered for the most demanding fleet and packhouse-logistics deployments — forklifts, AGVs, and roving fixtures that must stay connected as they move across large facilities.
Key features
Powered by Raspberry Pi CM4
Enterprise-grade roaming Wi-Fi — dual-band Wi-Fi 5 with sub-100 ms handover (802.11r/k/v)
Auxiliary peripheral connectors (RFID, scanners)
Phone-based captive-portal setup — no app or laptop required
Applications
Forklift & AGV terminals — keep moving equipment connected across the full coverage map
Handheld scanners & PDAs — picking, putaway, and cycle-count flows with no session drops
Mobile packhouse stations — roving QC and weighing fixtures that follow the line
Cold-store & warehouse logistics — uninterrupted scanning across multi-AP facilities
Distribution & yard operations — coverage gaps no longer mean dropped transactions
Built for mobile equipment
Powered by the Raspberry Pi Compute Module 4.
The full Robot software stack — application profiles, JSON-over-HTTP transactions, and the Robot SCADA & IOT Server integration — runs on the same Linux platform as the rest of the range.
The T440 carries the Robot architecture onto moving equipment. Where the T430 covers fixed stations on a single AP, the T440 is purpose-built for fleets in motion: forklifts crossing a cold-store, handheld terminals moving between zones, roving QC and weighing fixtures. Extended I/O, dual-radio connectivity, GPS/IMU telemetry, and auxiliary peripheral connectors round it out as a flagship vehicle terminal.
Everything else in the Robot product line plugs in unchanged — the same application profiles, the same JSON-over-HTTP transactions, the same Robot SCADA & IOT Server fleet management.
Wi-Fi connectivity
The defining feature of the T440 is its enterprise-grade Wi-Fi subsystem, designed to keep mobile equipment online across an entire facility — not just within one access point’s coverage.
Why it matters
Most Raspberry Pi Wi-Fi solutions are designed for a desk, not a moving vehicle. They camp on one access point and only look for a better one once the connection has already failed — by which point a forklift has already driven through a dead spot and dropped its session.
The T440’s comms board is built around the opposite philosophy: stay ahead of the signal. It continuously tracks every access point in range, pre-authenticates with the best candidates, and hands over to a stronger AP before the current one fades — typically in under a tenth of a second, with no visible interruption to the application.
Radio specification
| Item | Specification |
|---|---|
| Standards | 802.11 a / b / g / n / ac (Wi-Fi 5) |
| Bands | 2.4 GHz + 5 GHz (dual-band) |
| MIMO | 2 × 2 |
| Peak data rate | 867 Mbps (80 MHz, 5 GHz, 2 × 2) |
| Channel widths | 20 / 40 / 80 MHz |
| Module | Ezurio ST60-2230C (Sterling-70 family) |
| Host platform | Raspberry Pi Compute Module 4 (CM4 I/O board) |
| Host OS | Raspberry Pi OS (Bookworm) |
| Antennas | 2 × U.FL, external |
T440 Wi-Fi vs. onboard Raspberry Pi Wi-Fi
The standard CM4 (and Pi 4/5) onboard radio is fine for a stationary device on a single access point. It was never designed for mobile equipment crossing a multi-AP facility. This is the gap the T440 closes.
| Onboard Pi Wi-Fi | T440 Wi-Fi | |
|---|---|---|
| Chipset | Broadcom/Cypress CYW43455 | Marvell 88W8997 (Ezurio Sterling-70) |
| Standards | 802.11 b/g/n/ac | 802.11 a/b/g/n/ac |
| Bands | 2.4 / 5 GHz (one at a time) | 2.4 / 5 GHz dual-band |
| MIMO | 1 × 1 | 2 × 2 |
| Peak data rate | ~433 Mbps | 867 Mbps |
| Antennas | Single (internal or 1× U.FL) | 2 × external U.FL |
| 802.11r Fast Transition | ✗ | ✓ |
| 802.11k Neighbor Reports | ✗ | ✓ |
| 802.11v BSS Transition | ✗ | ✓ |
| Proactive roaming engine | ✗ (scan-on-failure only) | ✓ ranked candidates, roam-on-trend |
| Typical handover time | 1–2 s (often a dropout) | < 100 ms |
| WPA3-Enterprise / 192-bit Suite-B | Limited | ✓ |
| Cisco CCX support | ✗ | ✓ |
| Designed for | Stationary devices | Mobile equipment in motion |
The headline difference isn’t raw speed — it’s that the onboard radio only looks for a better access point after the current one has already failed. The T440 is always roam-ready, so a forklift driving through a coverage gap hands over seamlessly instead of dropping its session.
Roaming — the core capability
Built for environments where a device travels continuously between access points: warehouses, cold stores, packhouses, distribution centres, and manufacturing floors.
Standards-based fast roaming
| Standard | Capability | Benefit |
|---|---|---|
| 802.11r (Fast Transition) | Pre-authenticates and pre-keys candidate APs | Handover drops from 1–2 seconds to under 100 ms |
| 802.11k (Neighbor Reports) | AP advertises which neighbouring APs exist | Client skips slow blind scans — finds the next AP instantly |
| 802.11v (BSS Transition) | AP can steer the client to the optimal AP | Network-assisted load balancing and band steering |
Together: 802.11k tells the device where to look, 802.11v advises when to move, and 802.11r makes the move fast.
Proactive roaming engine
Beyond the standards, the T440 runs an active candidate-management loop that keeps the device permanently roam-ready:
- Maintains a ranked list of every known access point for the current network.
- Scans the best candidates first instead of sweeping the whole band.
- Polls signal strength continuously to catch degradation early — before it becomes a dropout.
- Roams on a sustained improvement, with hysteresis to prevent ping-ponging between two equally-strong APs.
- Prefers the 5 GHz band when signals are comparable, steering the device onto the less-congested band automatically.
- Tunable per site — scan cadence, signal thresholds, and roam aggressiveness can be matched to each deployment’s RF layout.
Real-world handover behaviour
| Scenario | Result |
|---|---|
| 802.11r fast roam | < 100 ms — imperceptible to the application |
| Standard reassociation fallback | 200–600 ms |
| Signal degradation | Detected and acted on before the link drops |
| AP-initiated steering (802.11v) | Honoured automatically |
Security
| Security mode | Supported |
|---|---|
| WPA3-Personal (SAE) | ✓ |
| WPA3-Enterprise (incl. 192-bit Suite-B) | ✓ |
| WPA2-Personal (PSK) | ✓ |
| WPA2-Enterprise / 802.1X (EAP-TLS, PEAP, TTLS, MSCHAPv2, EAP-FAST) | ✓ |
| OWE (encrypted open networks) | ✓ |
| Protected Management Frames (802.11w / PMF) | ✓ |
| Fast Transition on PSK and Enterprise (FT-PSK / FT-EAP) | ✓ |
Cisco CCX extensions are supported for Cisco-centric RF environments.
Provisioning & deployment
- Zero-touch field setup. On first boot — or after a Wi-Fi reset — the device raises its own setup hotspot. Connecting a phone to it opens a setup page automatically (captive portal); IT staff pick the network, enter the password, and the device joins. No app, no laptop, no cable.
- Static or DHCP addressing — configurable from the setup page to suit site networking policy.
- MAC identification — the setup page shows the device’s Ethernet MAC for asset-sticker matching during fleet rollout.
Regulatory
- Country-specific channel and power limits enforced via a signed regulatory database, configurable per deployment region.
- Operates within the strictest of factory, driver, and regional limits.
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