🔌 Cellhasher Chassis Connection Types (Ethernet/USB/Wireless)
USB mode and Ethernet and Wireless connections.
🎥 Video Guide
Watch the full tutorial on switching between USB and OTG (Ethernet) modes below:
CellHasher supports two primary chassis connection types: USB Mode (Direct Connection) and OTG Ethernet Mode (LAN Connection). This guide explains how each mode works, how to switch between them, and how to troubleshoot common connection issues.
⚙️ Connection Overview
USB Mode
Devices are connected directly to your PC via USB cables.
Best for setup, configuration, and debugging.
OTG (Ethernet) Mode
Devices communicate with the PC over a shared LAN network via Ethernet (OTG).
Best for wireless, rack, or remote setups where devices are not directly connected by USB.
💡 Tip: Ethernet (OTG) mode still requires an initial USB connection to enable LAN communication before devices can be discovered over the network.
🔵 USB Mode — Direct Connection
USB Mode is the default connection state when devices are first plugged into your chassis. In this mode, the device cards in CellHasher display a blue phone icon next to the device serial ID.
Steps to Use USB Mode
Connect all devices to your chassis via USB.
Open the Device Tab in CellHasher.
Verify that each device shows a blue phone icon next to its serial ID — this indicates an active USB connection.
You can now perform normal setup operations, installations, or ADB-based automation.
⚠️ Note: For large clusters, ensure all USB hubs are powered and recognized by Windows before proceeding.
🌐 OTG (Ethernet) Mode — LAN Connection
OTG Mode allows your devices to communicate wirelessly (over LAN) with your PC without maintaining a USB data link. However, an initial USB connection is required to enable Ethernet-over-USB and assign TCP/IP communication.
🧭 Switching from USB Mode to Ethernet Mode
From the Device Tab, select all devices currently connected via USB (blue phone icons).
You can select devices individually or use the Select All button.
Click the LAN Connect button at the top of the Device Tab. This opens the Connect to LAN popup.
Initial Connect to LAN popup
⚙️ Configure LAN and Port Settings
After clicking Continue, the setup window will appear with network configuration details.
Enter your host PC’s local IP address (e.g.
192.168.1.100) — this must be on the same subnet as your OTG chassis.Leave the default port set to
5555.Click Switch to LAN.
IP and port configuration screen
⚠️ Confirm the LAN Switch
Once your configuration looks correct, you’ll receive a confirmation window before the switch begins.
Final confirmation before enabling Ethernet mode
🔄 Physical Switch on Chassis
After confirming the switch:
On your CellHasher chassis, double-press the mode button quickly to toggle from USB to Ethernet mode.
The LED indicator will change from blue (USB) to green (Ethernet).
Wait for a few seconds until all devices stabilize in LAN mode.
🔍 Scanning for Devices on LAN
Once switched:
Return to the Device Tab.
Click Scan Ports at the top of the page.
The system will scan for devices on port 5555 and reconnect them over the LAN.
✅ Success: Devices discovered over Ethernet mode will appear again in the list — now connected wirelessly via LAN.
🧠 Troubleshooting & Developer Notes
⚙️ Developer Insight: When you click Convert to WiFi, it automatically enables TCP port 5555 on all devices. After converting to Ethernet mode, you may wish to disable Wi-Fi on each device to ensure stable OTG routing.
⚠️ ADB Connection Lock: If a port scan stalls, one of your devices may be waiting for an ADB authorization prompt.
Check the phones’ screens and accept the USB debugging prompt.
Alternatively, go to Settings → Restart ADB Server in the app to reset connections.
💡 If no devices appear after scanning:
Confirm that your host PC and CellHasher chassis are on the same network/subnet.
Check that port 5555 is open and reachable.
Verify that the chassis successfully switched to Ethernet mode (green lights).
🎥 Video Guide
Watch the full video tutorial on switching between USB and OTG (Ethernet) modes for a visual step-by-step demonstration. https://youtu.be/0B3hKAl8g80
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