Configure and verify the three TG-BT5-IN beacons #9

New Issue

2026-08-11T15:41:39Z

lars commented

2026-08-11 15:41:39 +00:00

Question

Configure the 3 beacons per the TG-BT5-IN research and prove a phone can see all three continuously.

Done when:

Each beacon has a unique ID, a known TX power, and the fastest advertising interval it supports.
A phone detects all three at once, and the observed update rate per beacon is recorded (a rate below ~1Hz makes any accuracy number meaningless).
Filtered RSSI at exactly 1m from each beacon is measured — the reference for any distance model, and per-beacon spread here is itself a finding.
Anything that makes them unusable for the bake-off is reported loudly and early, since it invalidates the BLE side of it.

Part of the wayfinder map #1.

## Question Configure the 3 beacons per the TG-BT5-IN research and prove a phone can see all three continuously. Done when: - Each beacon has a unique ID, a known TX power, and the fastest advertising interval it supports. - A phone detects all three at once, and the **observed update rate per beacon** is recorded (a rate below ~1Hz makes any accuracy number meaningless). - Filtered RSSI at exactly 1m from each beacon is measured — the reference for any distance model, and per-beacon spread here is itself a finding. - Anything that makes them unusable for the bake-off is reported loudly and early, since it invalidates the BLE side of it. --- Part of the wayfinder map #1.

lars added this to the Wayfinder: RN prototyping spec milestone 2026-08-11 15:41:39 +00:00

lars added the wayfinder:task label 2026-08-11 15:41:39 +00:00

lars added a new dependency 2026-08-11 15:42:12 +00:00

#4 Research: MikroTik TG-BTS-IN beacon capabilities and configuration

lars added a new dependency 2026-08-11 15:42:13 +00:00

#13 Write the Session 0 spec (positioning bake-off)

lars changed title from ~~Configure and verify the three TG-BTS-IN beacons~~ to Configure and verify the three TG-BT5-IN beacons

2026-08-11 15:50:36 +00:00

lars commented

2026-08-11 15:50:36 +00:00

Prerequisites established by #4 (part number corrected: TG-BT5-IN, not TG-BTS-IN):

Bring a magnet. Tags ship asleep — hold a magnet to the reed switch 3–10s to wake, then 5–10s more to enter config mode. Without one this ticket cannot start.
Config is phone-only, via the free MikroTik Beacon Manager app over BLE. No RouterOS device required (RouterOS cannot configure tags at all).
Set advertising interval to 100ms — the floor is 20ms, but the factory default is 5s, which is useless for positioning.
Battery is non-replaceable (220mAh). ~2–4 months at 100ms, extrapolated — check the app's on-device estimator and record what it says.
Geometry: 3 tags is the degenerate minimum. Place them as a fat triangle, never near-collinear. Consider buying 3 more (~$10) before the bake-off.
Expect 1.5–3m RSSI accuracy — set the gate in #11 accordingly; this is quadrant-level, not AR-grade pose.

**Prerequisites established by #4** (part number corrected: **TG-BT5-IN**, not TG-BTS-IN): - **Bring a magnet.** Tags ship asleep — hold a magnet to the reed switch 3–10s to wake, then 5–10s more to enter config mode. Without one this ticket cannot start. - **Config is phone-only**, via the free *MikroTik Beacon Manager* app over BLE. No RouterOS device required (RouterOS cannot configure tags at all). - **Set advertising interval to 100ms** — the floor is 20ms, but the factory default is 5s, which is useless for positioning. - **Battery is non-replaceable** (220mAh). ~2–4 months at 100ms, extrapolated — check the app's on-device estimator and record what it says. - **Geometry:** 3 tags is the degenerate minimum. Place them as a fat triangle, never near-collinear. Consider buying 3 more (~$10) before the bake-off. - Expect **1.5–3m** RSSI accuracy — set the gate in #11 accordingly; this is quadrant-level, not AR-grade pose.

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#13 Write the Session 0 spec (positioning bake-off)

lars/splat-indoor-navigation

Depends on

#4 Research: MikroTik TG-BTS-IN beacon capabilities and configuration

lars/splat-indoor-navigation

Reference: lars/splat-indoor-navigation#9