10 · Wireless Channel Setup

Wireless Channel Setup

Scan for an RF (LoRa) channel and change it safely with every receiver powered on. Also covers isolating neighboring Tally systems with the Sync Word.

Ready-made kit · master only

Before you start

07 · License activated (Active badge)
09 · Switcher Integration done
For changes: all target receivers can be powered on

Channel scan#

Only Frequency (MHz) and Sync Word are editable on the web. The band (868/433MHz) is auto-detected from the hardware at boot.

1
Start Scan
Channel Scan card → sweeps the chip band at 1MHz steps (850-930 on an 868MHz chip)
2
Read results
Rows fill every 0.5s → each row = frequency + bar + RSSI + Clear/Busy (-80dBm or below = Clear)
3
Click a row
Clicking fills the settings form (saving is separate → toast reminds you)

Scanning interrupts tally

The scan monopolizes the RF chip (seconds to tens of seconds). No cancel button.

Changing channels#

Broadcast screen — scan results and settings card — Broadcast screen

Receivers that were off stay on the old channel

A receiver powered off during the change misses the announcement and stays on the old channel — it will not reconnect until you move the master back or reconfigure it.

1
All receivers ON
Power every target receiver and keep them near the master → ready
2
Confirm values
Check Frequency and Sync Word sliders → already filled from a scan row
3
Save Channel Settings
Button shows Applying settings… → applied after 5-10 seconds
4
Verify
All receivers Online on the Devices screen → change complete

Multi-system isolation (Sync Word)#

The Sync Word identifies LoRa packets — one system (a master and its receivers) shares one value; give neighbors different ones to separate systems.

Item	Value
Input	Slider (integer 1-150 = 0x01-0x96), no presets
Default	0x12 (18)
Example	Three systems on 868MHz → 0x12 / 0x40 / 0x80

Range and interference#

Factor	Recommendation
Line of sight	Unobstructed direct path — avoid concrete walls and metal structures
Placement · height	Keep the internal antenna clear of metal, mounted as high as possible

All receivers Online after the change
Current channel is Clear (or the recommended one)

Post-change issues: Troubleshooting · communication.

Next steps

11 · Managing Receivers— Status, numbers, brightness

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