StarSync ATAK Plugin
Direct-to-cell satellite SMS is the cheapest off-grid comms ever built — but the engineering to make it carry encrypted ATAK CoT is non-trivial. StarSync hides the complexity. The team installs, scans a QR, and the picture flows.
When 50,000 phones overrun a tower, data dies before the towers do — but SMS keeps moving on the cellular control channel. When you cross past the cell grid entirely, you're dark unless you're carrying a satellite terminal. Either way, the team's CoT picture goes flat right when it matters most.
Every cellular generation since 1992 carries SMS — 2G/GSM, 3G, 4G LTE, 5G — and so do modern direct-to-cell satellite carriers. SMS rides the control channel: separate from data, prioritized for delivery, the last thing to die when networks fail. StarSync rides whatever leg is alive — saturated cell, 3G fallback, satellite — without an Iridium terminal, roof antenna, or second device. Hardware cost: zero. Bandwidth cost: a few SMS.
StarSync intercepts every CoT event in ATAK — PLI, GeoChat, SOS, routes, shapes, markers — serializes to compact protobuf, encrypts with AES-256-GCM, and ships over SMS. The receiving plugin reverses the path and the marker lands on the team's map. HAIL physiological data from operator smartwatches feeds the same pipeline — heart rate, injury status, location all flow as encrypted SMS to the COP.
Setup feels like configuring a messaging app — because that's exactly what it is, with the encrypted ATAK pipeline hidden underneath. Install, scan a QR, and the team is on net in five minutes. No certificates. No field engineer. No infrastructure to stand up. The same setup that took a comms officer two days last decade fits in a coffee break now.
Add a phone-number gateway to your TAK Server and StarSync becomes the federation glue between connected and SMS-only operators. The HQ comms NCO sees field SMS units on the same Common Operating Picture as IP-connected EUDs — one TAK_OS server, two transports, every CoT event flowing both ways. The gap between the wire and the wireless closes.
Every CoT event is serialized to compact protobuf, encrypted with AES-256-GCM (12-byte IV, 16-byte auth tag), and sent over standard SMS. Shared passphrase derives the key — same passphrase on both ends, no certificate exchange, no key server.
Auto-detects every cellular generation (5G, 4G LTE, 3G, 2G/GSM) and direct-to-cell satellite legs (T-Mobile / Starlink T-Sat, AST SpaceMobile, Apple Globalstar). Operators don't pick a leg — StarSync rides whichever transport the modem can reach and surfaces it in the device list.
Position reports (PLI), GeoChat text, SOS alerts, routes, shapes, markers, video links, and HAIL data — all encoded in protobuf for compact wire format. Generic CoT XML falls back to gzip + Base64 for any unknown type.
Send PLI, alerts, and chat to multiple phone numbers in one operation — comma-separated destination list in preferences. Each message replicates across the team without requiring a TAK Server in the middle.
PLI transmission is rate-limited per contact (default 15s) so a busy team doesn't burn through SMS budget. GeoChat and SOS alerts bypass the limiter so urgent traffic always lands. Live countdown timer in the plugin pane shows time-to-next.
Encode every plugin setting — destination phones, encryption passphrase, TX interval — into a QR. Scan it on every team device to bring the unit online in seconds. No shared docs, no copy-paste mistakes.
When 50,000 phones overrun a tower's data backhaul — stadiums, festivals, mass-casualty incidents, multi-agency responses — the data plan collapses but SMS keeps moving on the cellular control channel. StarSync rides that path, so the team's PLI, GeoChat, and SOS land when nothing else does.
Modern tactical comms assume bandwidth. SMS doesn't. It rides the cellular control channel on every generation (5G/4G/3G/2G), survives saturation when the data plane collapses, and works on direct-to-cell satellite carriers when there's no tower at all. Four resilience tiers, one transport, every operator stays on net.
Every cellular generation: 2G/GSM, 3G, 4G LTE, 5G. SMS rides the control channel — separate from data and prioritized for delivery, even when the data plane is congested or deprioritized to nothing.
Stadiums. Festivals. Mass-casualty incidents. Multi-agency responses. The data plane collapses first — SMS rides the control channel and keeps the team's CoT picture moving when nothing else does.
T-Mobile / Starlink T-Satellite, AST SpaceMobile, Apple Globalstar, and the carriers behind them. Modern direct-to-cell sat networks deliver SMS to a stock smartphone — no terminal, no antenna. StarSync auto-detects T-Sat and rides it the moment the operator crosses out of cell coverage.
Routes, shapes, and large CoT payloads exceed SMS's 153-character ceiling. StarSync auto-fragments into multipart SMS and falls back to MMS for the largest events — transparent to the operator, no extra config, no manual size checks.
Verified on production builds. The plugin uses the device's native SMS stack — if the modem can send SMS, StarSync can use it.
Five stages from Operator A's tap to Operator B's map. Each stage shrinks the payload, hardens it, and keeps it moving — what travels is barely bigger than a text message.
0x0A 14 P L I 12 04 38 39
IV(12) ‖ ciphertext ‖ tag(16)
k7+8aLm2Yp...zQ==
marker · PLI · 38.9°N · live
Plugin overhead is ~22ms. The rest is carrier transit — same as any text message.
From a 1.2KB CoT XML down to a single 150-character SMS — 88% reduction.
Authenticated encryption with a 16-byte tag. Tampering is detected before injection.
Same pipeline runs in reverse on the receiving device. PLI, GeoChat, SOS, routes, HAIL — all flow both ways.
Add to cart and check out. JWT license key arrives by email within 2 minutes.
Download the StarSync APK from your activation email. Load it on your ATAK EUD through the standard plugin loader.
Tap the StarSync toolbar icon. Paste your license key — the plugin validates the Ed25519 signature offline, binds to the device hardware ID, and unlocks the pane.
Open StarSync Preferences. Add destination phone numbers (comma-separated, +country codes accepted). Enable AES-256 encryption and enter the team passphrase.
+15551234567, +447700900123
Tap the QR icon to encode every setting (phones, passphrase, TX interval) into a QR code. Scan it on every other team device — the receiving plugin auto-populates settings.
Watch the Next PLI countdown in the plugin pane. When it fires, the receiving device should show your callsign in its Device List and your marker on the map. You're operational.
The people who built the plugin are the people who support it. Not a ticket queue. Not a first-line rep reading from a script.
Setup guide, encryption configuration, T-Satellite enablement, troubleshooting, release notes. Every feature documented.
Active community of operators, comms officers, SAR teams, and TAK admins. Fast peer support, direct engineer access.
Step-by-step quick-start with screenshots. License activation, passphrase setup, QR provisioning, first PLI.
For fleet deployments, custom passphrase rotation policies, SEWP/GSA procurement, or anything that needs a real conversation.
$150 / device / year unlocks every feature. Renews each year on the activation anniversary. Volume pricing kicks in for fleets.
Common questions.
What buyers ask before they sign up. If yours isn't here, contact us — we'll get you a real answer in under 24 hours.
Any carrier. Every generation. 5G, 4G LTE, 3G, 2G/GSM — if the modem can send SMS, StarSync rides it. Same for direct-to-cell satellite: T-Mobile / Starlink T-Satellite (auto-detected), AST SpaceMobile, Apple Globalstar, and every carrier launching on top of them. The plugin uses the device's native SMS stack — no allowlist, no approved-carrier list. What the phone can text, StarSync can carry.
No. Any Android EUD already running ATAK 5.4+ with cellular SMS capability is enough. No Iridium handset, no roof antenna, no $5K dedicated terminal. Hardware cost of going off-grid is $0 + the phone you already field.
Yes — AES-256-GCM with a shared team passphrase. Each message carries a fresh 12-byte IV and a 16-byte authentication tag. Tampering is detected before the CoT event is injected on the receiving device. Keys are derived deterministically via SHA-256 of the passphrase, so peer plugins and TAK Server gateways stay in sync without certificate exchange.
PLI (position), GeoChat, SOS alerts, routes, shapes, markers, video links, and HAIL physiological / smartwatch data — heart rate, injury status, location all flow through the same encrypted SMS pipeline. Unknown CoT XML types fall back to gzip + Base64 so nothing gets dropped.
Yes — and this is where StarSync closes the gap. Add a phone-number gateway to your TAK Server (TAK_OS or any provider) and the server federates IP-connected ATAK devices with SMS-only operators on the same Common Operating Picture. CoT flows both ways through the gateway. The HQ comms NCO sees the field SMS units alongside the wired team — one server, two transports.
A PLI fits in 1 SMS (~150 chars). GeoChat fits in ~2 SMS. Routes and shapes auto-fragment into multipart SMS or fall back to MMS for the largest payloads. Plugin rate-limits PLI to 15-second intervals per contact by default — plan around ~4 SMS per minute per operator on active ops, well under any modern SMS plan.
Yes. StarSync is software-only — no hardware, no ITAR concerns. The plugin runs on stock Android EUDs, and modern handsets from approved vendors satisfy NDAA Section 889 / EAR-99 / TAA requirements. Built and signed in-house in Virginia Beach. We can sign a compliance attestation per deployment.
$150 / device / year. Single tier. Volume pricing kicks in for fleets of 10+ devices. Activation key arrives by email within 2 minutes of purchase; the plugin validates an Ed25519 JWT signature offline and binds to the device's hardware ID. Annual renewal on the activation anniversary. Transferable with a support ticket.
One bar of signal. Encrypted CoT on the team's map.
License the plugin in under 2 minutes. Or book a scoping call if you're deploying to a team of 10+ and need a volume quote.