Robot T440

Built for mobile equipment

The T440 carries the Robot architecture onto moving equipment. Where the T430 covers fixed stations on LAN, the T440 is purpose-built for fleets in motion: forklifts crossing a cold-store, roving terminals moving between zones, roving QC and weighing fixtures.

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 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

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.

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

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

Security

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.