Some Wi-Fi problems are obvious the moment you walk in. This one was no different.
I got a call from a logistics company north of Toronto. Their warehouse workers were complaining that handheld scanners dropped connection every time they moved between zones. The IT manager had replaced the scanners twice. He had called the carrier. He had done everything except look at the Wi-Fi itself.
What I Saw Before Running a Single Tool
I arrived on site and walked the floor for twenty minutes before opening Ekahau. That walk told me everything I needed to know.
The APs were mounted at chest height on steel shelving racks. Not at ceiling height. Not above the obstructions. Furthermore, every AP was fighting its neighbours for airtime because none of them could see over the inventory. Steel racking is one of the worst RF environments possible. Signal bounces, absorbs, and attenuates in ways that ceiling-mounted APs can largely avoid.
Moreover, the channel plan was a mess. Channels 1, 6, and 11 were in use, which is correct on paper. However, nobody had audited the transmit power settings. Every AP ran at maximum power. Consequently, co-channel interference covered the entire floor. Scanners trying to roam from one AP to the next were competing with interference from every direction.
The Sticky Client Problem Nobody Named
Additionally, the client had configured all handheld devices to use 2.4 GHz only. That decision made sense in 2009. In a modern warehouse with 40 APs on the floor, it creates a serious problem. 2.4 GHz offers only three non-overlapping channels. With 40 APs sharing those three channels, interference is unavoidable regardless of how carefully you plan the layout.
The team had also never touched the roaming thresholds on the scanners. Specifically, the devices held onto weak signals far past the point where they should have switched to a stronger AP. That behaviour is called sticky client syndrome. It is one of the most common causes of dropped connections in warehouse environments, and also one of the most overlooked.
Consequently, workers would move 30 feet and the scanner would still cling to an AP 200 feet behind them. The connection did not drop because the Wi-Fi failed. It dropped because the device finally gave up and roamed, and that half-second transition was enough for the warehouse management system to log a disconnect.
The Fix Was Not Expensive
In practice, the solution was straightforward. We relocated eight APs to ceiling height above the racking. We adjusted transmit power down by 6 dB across the floor. Additionally, we enabled 5 GHz on the handheld devices and reconfigured the roaming thresholds to trigger earlier and more aggressively.
We ran a proper RF site survey before touching the channel plan. That survey took three hours. Notably, it identified four dead zones that nobody on the team knew existed because the symptoms always pointed to the scanners rather than the coverage gaps.
The results were immediate. Roaming events dropped by 80 percent in the first week. Importantly, the total cost of the remediation was less than one replacement scanner. The company had spent thousands on new hardware chasing a problem that was never in the hardware.
What This Means for Your Facility
I see this pattern constantly. An organization experiences Wi-Fi problems and replaces equipment, calls the carrier, and opens support tickets. However, they never think to look at the RF layer first. That is where almost every warehouse Wi-Fi problem actually lives.
Furthermore, most IT teams do not know that a proper RF site survey can identify these issues without buying a single piece of new hardware. In fact, the survey often pays for itself in the first week by eliminating unnecessary equipment purchases.
Similarly, most roaming problems in warehouse environments trace back to a small number of root causes: sticky clients, overpowered APs, poor AP placement, and wrong frequency band selection. Those are all fixable without major new spending.
Therefore, if your team is complaining about scanner dropouts or connection issues on mobile devices, do not order new hardware. Get an RF site survey done first. Understand the problem before you spend money on a solution.
That is what Baiden Group does. We walk the floor before we recommend anything.
Have questions about how these developments affect your network? Reach out to the Baiden Group team.