Main is the general site board: lockers, doors, I/O expansion, mesh and readers. Choose DIN for a single power channel with metering. Choose LoRa when Wi‑Fi is unreliable and you need a remote uplink.
Rule of thumb: when unsure and power is available on site — start with Main + sidecar.
Set the local admin password, codes and a test card before pointing the board at a server. You always keep a fallback control path if the cloud is down.
Place the hub where uplink exists and near the geometric center of neighbors. Metal cabinets and thick walls hurt more than expected — one extra node beats chronic offline states.
After issuing a grant on the server, wait for sync to the board. Test unlocks with uplink disabled — that is the incident behavior your client will see.
Start with a known poll template, one device on the bus and a short cable. Only after stable values add norms and alerts in bbxGrid.
Do not update the whole fleet at once. Start with a bench unit and one canary, then a group. Keep the previous image ready for rollback.
bbxTron is built to run doors and lockers from power-on: local UI, on-device credentials, mesh and sidecar without a server. bbxGrid adds organizations, analytics and AI later — without rewiring.
Main is the general site board. ETH fits cabled cabinets. DIN covers single-channel power plus metering. LoRa serves remote gates. Sidecar cheaply expands slots next to Main.
One online controller hubs neighbors and sidecars while bbxGrid shows topology and status — a common path for warehouses and utility rooms.