Lageeni: ühendatud side

Projekti ülevaade

What is Alin Li Lageeni?

Alin Li Lageeni (لاقيني — araabia keeles "Leia mind / Kohtu minuga") on ESP32-l põhinev avatud lähtekoodiga võrguväline hädaabisidesüsteem. See kasutab kahte sidekihti: ESP-NOW for fast, low-power short-range and LoRa for long-range — no internet, no WiFi networks, no cellular service required.

ESP32ESP-NOWLoRa 433/868 MHzWeb UI (temp)SOS SystemDeep SleepAvatud lähtekood

Use Cases

Emergency Situations — Natural disasters, power outages, or network failures where cellular/internet is unavailable
Õueseiklused — Camping, hiking, or field trips where groups need to stay connected across long distances
Educational Projects — Teaching students (ages 9–14) about wireless communication, networking, and IoT
Community Events — Coordination at large gatherings without relying on WiFi infrastructure
Search & Rescue — Locate lost group members using signal strength and GPS sharing

v3.0 ArchitectureWiFi AP mode is used only during initial setup for the configuration web UI, then turned OFF. ESP-NOW + LoRa provide the runtime communication backbone. This saves battery and removes the single-point-of-failure WiFi master.

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Olemasolevad lahendused ja meie eripära

The Landscape

Several solutions exist for off-grid communication. Some are open-source community projects, others are commercial products. Here's how they compare — and why we built Alin Li Lageeni to fill a gap none of them address.

Meshtastic

The most popular open-source LoRa mesh project. Community-driven, supports many hardware boards, uses flood-based routing. Available on ESP32 and nRF52 platforms with companion mobile apps for iOS and Android.

Avatud lähtekoodLoRa silmusvõrkMobiilirakendusLarge Community

MeshCore

Uuem avatud lähtekoodiga LoRa silmusvõrgu püsivara (MIT-litsents), mis kasutab üleujutamise asemel pakettide valikulist edastamist. Toetab kordisteid, ruumiservereid ja kaasraadio režiime. Kasvav kogukond mobiilirakenduste ja veebikliendiga.

Avatud lähtekoodSelective RoutingWeb ClientUuem projekt

goTenna

Kaubanduslik silmusvõrguseade. Tarbijaversioon toetab tekstsõnumeid ja GPS-i seotud nutitelefoni kaudu. Pro-versioon pakub sõjalise taseme krüpteerimist ja lõimingut taktikaliste rakendustega nagu ATAK. Suletud lähtekoodiga omandtoode.

CommercialClosed SourceVajab telefoniSõjaväetasemel

Garmin inReach

Satelliitsideseade, mis ühendub Iridiumi satelliidivõrguga ülemaailmseks kahesuunaliseks sõnumivahetuseks ja SOS-häireteks koos professionaalse ööpäevaringse päästeseirekeskusega. Vajab tasulist tellimust. See pole silmusvõrk — ühendus käib seadmest satelliidini.

Commercial ($300–500)Subscription RequiredSatellite / Global24/7 abikeskus

Head-to-Head Comparison

Feature	Alin Li Lageeni	Meshtastic	MeshCore	goTenna	Garmin inReach
Cost	~$15–30 DIY	~$20–60 DIY	~$20–60 DIY	$180–300+	$300–500+
Subscription	Puudub — tasuta	Puudub	Puudub	Puudub	$15–65 kuus
Communication	ESP-NOW + LoRa (dual)	Ainult LoRa	Ainult LoRa	Proprietary radio	Iridium satellite
Range	200m–15 km	1–15 km	1–15 km	1–6 km	Global
Kas telefon on vajalik?	Ei — sisseehitatud veebiliides	Yes (BLE app)	Yes (BLE app)	Yes (BLE app)	Valikuline
Setup Complexity	Rühmita 1 klõpsuga	Keskmine (rakenduse seadistus)	Keskmine (püsivara laadimine + CLI)	Easy (app pairing)	Easy (account setup)
Target Audience	Youth / Education	Hobbyists / DIY	Hobbyists / Technical	Välitingimused / taktikaline	Välitingimused / Pro
SOS System	Dual-channel + ACK + countdown	Basic (via app)	Sisseehitatud SOS puudub	Indirect only	24/7 abikeskus
Sleep / Battery Save	4 režiimi (kuni 0.01mA)	Energiasäästurežiim	Sleep optimized	~24h battery life	Days to weeks
Arabic / RTL UI	Yes — built-in	Community translation	Ei	Ei	Ei
Classroom Mode	Yes — quizzes, attendance	Ei	Ei	Ei	Ei
Audit Logs	Full on-device + export	App-side only	Piiratud	App-side	Cloud only
Avatud lähtekood	Yes (MIT)	Yes (GPL-3)	Yes (MIT)	Ei	Ei
Silmusvõrgud	Relay via peers	Flood-based mesh	Selective routing	Silmusvõrgu võimekus	Ei (punktist satelliidini)

What Makes Alin Li Lageeni Different?

Built for education first — Designed specifically for students ages 9–14. Simple 1-click grouping, friendly web UI, no app install needed. Meshtastic and MeshCore are powerful but designed for hobbyists and require technical setup.
Dual-layer communication (ESP-NOW + LoRa) — No other solution combines ESP-NOW for ultra-low-power short-range with LoRa for long-range. Meshtastic and MeshCore use LoRa only. This gives us better battery life for nearby peers and automatic channel fallback.
Telefonisõltuvuseta — Meshtastic, MeshCore, and goTenna all require a paired smartphone via Bluetooth. Lageeni has a built-in web UI accessible from any device with a browser, plus physical button operation for phone-free use.
SOS with safety countdown — A 5-second cancellable countdown prevents accidental SOS triggers. Dual-channel broadcast ensures maximum reach. ACK tracking shows exactly who received the alert. No other LoRa solution offers this level of SOS design.
Arabic and bilingual support — Native Arabic (RTL) interface built-in. No existing LoRa mesh project offers this. Critical for classrooms and communities in the Middle East.
Classroom mode — Unique feature: teacher can broadcast quizzes, take attendance, and send group messages. Students respond via button press. No internet needed. No other mesh solution has this.
Full on-device audit logs — All events stored in flash with permanent SOS logs, filterable by type, exportable as JSON/CSV. Meshtastic only logs on the phone app; MeshCore has limited logging.
Zero ongoing cost — Unlike Garmin inReach ($15–65/month subscription) or goTenna Pro (commercial license), Lageeni has zero recurring costs. Hardware is $15–30 per device.

Alin Li Lageeni täidab ainulaadse nišiIt's not trying to replace Meshtastic (which excels at large community meshes) or Garmin inReach (which offers global satellite rescue). Lageeni is purpose-built for small groups, classrooms, and emergency preparedness where simplicity, low cost, bilingual support, and educational value matter most.

Miks ESP-NOW, mitte WiFi?

WiFi AP is Wrong for Emergency Devices

WiFi-pääsupunkt tühjendab kiiresti akut, nõuab ühe seadme pidevat „ruuterina” töötamist ja tekitab ühe tõrkepunkti. Hädaolukordadeks ning välitööks on vaja märksa säästlikumat ja töökindlamat lahendust.

Feature

WiFi AP/STA

ESP-NOW

Energiatarve

~150–200 mA continuous

~2–5 mA per burst

Setup Required

SSID, password, DHCP, IP

Ainult MAC-aadress

Single Point of Failure

Pääsupunkt lakkab töötamast = võrk lakkab töötamast

Võrdõiguslik, ilma keskse juhita

Range

~30–100 m

~200–500 m (open)

Latency

HTTP overhead (50–200ms)

~1–5 ms (direct)

Sleep Compatible

Ei (ühendus katkeb)

Yes (wake → send → sleep)

Partnerseadmete ülempiir

10 klienti (ESP32 piirang)

20 võrdseadet (10 krüpteeritud)

Meie 3-kihiline arhitektuur Layer 1 — WiFi AP: Ainult algse seadistamise ajal. Kasutaja ühendab telefoni → veebiliides → nime ja rühma muutmine. Seejärel on WiFi VÄLJAS.
Layer 2 — ESP-NOW: Short-range (200–500m), ultra-low power, for nearby devices.
Layer 3 — LoRa: Pikk leviala (1–15 km), kaugete seadmete ja hädaolukorra leviedastuse jaoks.

Süsteemi arhitektuur

Süsteemi töövoog

Sisselülitamine — ajutine WiFi-pääsupunkt

Each ESP32 boots and creates a temporary WiFi AP named "Lageeni-XXXX" (MAC-i viimased 4 märki). Kasutaja ühendab oma telefoni selle WiFi-võrguga ja avab veebipõhise seadistuslehe aadressil 192.168.4.1. See on only time WiFi runs.

Rename Device

Seadistuslehel annab kasutaja seadmele arusaadava nime (nt „Ahmed”, „Base Camp”, „Tent 3”). See salvestatakse NVS-välkmällu ja säilib taaskäivitamisel.

Scan & Discover Peers

From any device's setup page, the user taps „Otsi seadmeid“. Seade edastab LoRa avastusmajakas. Kõik levialas olevad sisselülitatud Lageeni seadmed vastavad oma MAC-aadressi, nime ja LoRa-aadressiga. Seadistusleht kuvab leitud seadmeid reaalajas. Rühmitamise võib algatada iga seade — kindlat ülemseadet pole.

Group All — Click to Join

User clicks „Rühmita kõik seadmed“. LoRa kaudu edastatakse GROUP_INIT pakett, mis sisaldab rühma ID-d, krüptovõtit, sünkroonimissõna ja täielikku seadmeregistrit. Kõik seadmed salvestavad selle seadistuse.

WiFi OFF — ESP-NOW + LoRa Active

Pärast rühmitamist WiFi turns OFF to save battery. All communication switches to ESP-NOW (lühikese levialaga ja väikese energiatarbega) ning LoRa (pikk leviala). Nutikas marsruutimine valib iga partnerseadme jaoks automaatselt parima kanali.

Communicate & Operate

Users interact via physical button (press = scroll messages, long-press 3s = SOS, double-press = re-enable WiFi temporarily for full web UI access). Messages route automatically via ESP-NOW (nearby) or LoRa (distant). WiFi auto-turns off after 5 minutes of inactivity.

Pidevalt: elusolekusignaalid ja jälgimine

Perioodilised elusolekusignaalid (ESP-NOW iga 10 s, LoRa iga 30 s) edastavad aku protsendi, RSSI ja GPS-i (kui saadaval). Kõik seadmed jälgivad üksteise võrgusolekut ja signaalitugevust.

Emergency? — SOS with Panic Countdown

Pikk vajutus (3s) on button triggers a 5-second visual countdown (saab tühistada!). Pärast loendust edastatakse SOS mõlemal kanalil korraga, 3 kordust. Kõik vastuvõtvad seadmed näitavad täisekraanil hoiatust ning käivitavad LEDi ja sumisti.

Seadme ümbernimetamine

Nimetamisreeglid

3–16 märki (lühem, et mahtuda LoRa paketi suuruse piiridesse)
Ainult tähed, numbrid ja tühikud — erimärkideta
Nimed peavad olema unique within the group
Stored in NVS flash — survives reboots and power loss
Default name: Lageeni-XXXX (MAC-i viimased 4 märki)
Rename happens during the WiFi setup phase only

Device Grouping

Grouping Packet (LoRa Broadcast)

{ "type": "GROUP_INIT", "group_id": "LAGEENI-A7F3", "lora_freq": 433E6, "lora_sync": 0xF3, "aes_key": "16-byte-key-here", "devices": [ { "mac": "A4:CF:12:7B:00:01", "name": "Base Camp", "lora_addr": 1 }, { "mac": "A4:CF:12:7B:00:02", "name": "Ahmed", "lora_addr": 2 }, { "mac": "A4:CF:12:7B:00:03", "name": "Tent 3", "lora_addr": 3 } ] }

Pärast rühmitamist

Kõik seadmed salvestavad rühma seadistuse NVS-välkmällu
LoRa häälestub kokkulepitud sagedusele ja sünkroonimissõnale
ESP-NOW peers registered using MAC addresses from the registry
WiFi turns OFF on all devices automatically
Heartbeat pings begin: LoRa every 30s, ESP-NOW every 10s
Smart routing: auto-selects ESP-NOW (nearby) or LoRa (distant) per peer

Sõnumisüsteem

Sõnumitüübid

Broadcast — To all group members (ESP-NOW + LoRa simultaneously)
Direct Message — To one device (tries ESP-NOW first, falls back to LoRa)
Heartbeat — Periodic alive ping with battery %, RSSI, GPS
SOS — Emergency broadcast, highest priority, repeated 3 times
LED Command — Remote blink to identify a device physically
ACK — Delivery confirmation for direct messages and SOS
Quick Reply — Predefined short responses (OK, Coming, Wait, Help, Safe)

Smart Channel Selection

function sendMessage(target, payload) { if (target.espnow_reachable && target.last_rssi > -80) { // Lähedal → ESP-NOW (kiire, väikese energiatarbega) espnow_send(target.mac, payload) } else if (target.lora_reachable) { // Kaugel → LoRa (pikk leviala) lora_send(target.lora_addr, payload) } else { // Kättesaamatu → lisa järjekorda ja proovi lähedaste seadmete kaudu edastada queue_for_relay(target, payload) } } function sendSOS() { // SOS kasutab ALATI MÕLEMAT kanalit korraga espnow_broadcast(sos_payload) lora_broadcast(sos_payload) repeat(3, interval=2000ms) // 3 korda, vahega 2s }

Sõnumite edastamise reeglid

Kasuliku koorma ülempiir: 200 baiti (LoRa piirang) / 250 baiti (ESP-NOW piirang)
Each message gets a unique ID to prevent duplicates
Direct messages expect ACK-kinnitus 3 sekundi jooksul; auto-retry up to 3 times
If ESP-NOW fails, automatically retries via LoRa (channel fallback)
Broadcast messages are fire-and-forget (no ACK required)
Sõnumid salvestatakse kohalikult: viimased 200 sõnumit SPIFFS-välkmälus
Undelivered messages shown with failure indicator in UI

SOS Emergency System

Elusid kaitsev lahendus — töötab ka tühjeneva akugaSOS uses the absolute minimum power needed for transmission and repeats across both channels to maximize the chance of being received.

How SOS Works

Trigger: Hoia nuppu all (3s) VÕI puuduta veebiliidese SOS-nuppu
Paanika pöördloendus: 5-second visual countdown with LED + buzzer beeps — user can cancel during this window to prevent accidental triggers
Broadcast: SOS packet sent on BOTH ESP-NOW and LoRa simultaneously
Repetition: SOS sent 3 times with 2-second intervals for reliability
Priority: SOS interrupts any current operation — even wakes from deep sleep
Content: Sender name, battery %, GPS coordinates (if available), predefined or custom message
Vastuvõtmisel: Full-screen red alert on web UI, rapid LED blink, buzzer siren (if connected)
ACK-kinnitus nõutud: Every receiving device sends ACK — sender sees who heard them
Püsivalt logitud: SOS events are never auto-deleted from flash storage
Cancel SOS: Sender can broadcast an "All Clear" to dismiss alerts on other devices

SOS Packet Structure

{ "type": "SOS", "from": 2, "from_name": "Ahmed", "battery": 34, "gps": { "lat": 25.2854, "lng": 51.5310 }, "message": „Vigastatud jõeületuskohas“, "repeat": 1, // 1 / 3 "timestamp": 1711000120 }

Predefined Quick SOS Messages

For fast emergencies where typing isn't possible (selectable by button presses or UI tap):

„Vajan kohe abi!“
„Vigastatud — saatke arstiabi“
„Tulekahju / oht — evakueerige piirkond“
„Vajan vett / varustust“
„Eksinud — palun leidke mu asukoht“
„Olen turvalises kohas — kõik on korras“ (tühistab aktiivse SOS-i)

Toitehaldus ja puhkerežiim

Toiterežiimid

Režiim	WiFi	ESP-NOW	LoRa	Current	Use Case
Setup	SEES	VÄLJAS	SEES	~160 mA	Initial config via web UI
Aktiivne	VÄLJAS	SEES	SEES	~80 mA	Tavaline töö
Kerge unerežiim	VÄLJAS	Wake	Kuula	~10 mA	Battery saving, still reachable
Deep Sleep	VÄLJAS	VÄLJAS	Timer	~0.01 mA	Pikim akukestus, ärkab taimeriga
SOS Mode	VÄLJAS	MAX	MAX	~200 mA	Emergency — all power to TX

Deep Sleep Behavior

Wakes every N minutit (kasutaja seadistatav: 1, 5, 10, 30 min)
Ärkamisel: saada elusolekusignaal, kontrolli ootel LoRa sõnumeid, uuenda olekut ja mine uuesti puhkerežiimi
LoRa DIO0 interrupt wakes ESP32 immediately on incoming SOS (hardware interrupt)
Füüsilise nupu vajutus äratab seadme alati mis tahes puhkerežiimist
Battery below 10% → auto light sleep with 30-min wake interval
Battery below 5% → sends "low battery — going offline" alert, then hibernates

Battery Monitoring

ADC viik loeb aku pinget pingejaguri kaudu
Battery % included in every heartbeat — all peers see your battery level
Akuhoiatused edastatakse 20%, 10% ja 5% tasemel
Estimated runtime displayed in web UI based on current power mode
Support for solar panel charging via TP4056 — indefinite runtime in deep sleep

Logid ja kontrolljälg

What Gets Logged

Sõnumid: Kõik saadetud/vastuvõetud (viimased 200, FIFO — vanim kustutatakse automaatselt)
SOS Events: Every SOS trigger and every ACK received — never deleted, permanent
Device Events: Join, leave, name change, group formation, deregister
System Events: Boot, sleep, wake, WiFi on/off, mode changes, channel switches
Errors: LoRa ja ESP-NOW algkäivitustõrked, tühjeneva aku sündmused, edastustõrked
Signal History: RSSI values per peer over time (useful for range testing)

Logide salvestus

// Logikirje struktuur { "ts": 1711000120, // Unixi ajatempel "type": "MSG_RX", // Sündmuse tüübi kood "from": "Ahmed", "ch": "ESPNOW", // Kanal: LORA | ESPNOW "rssi": -65, "data": „Vajan jõe ääres abi“ } // Salvestus: sõnumeid 200, SOS piiramatu, süsteem 500 // Kokku: ~512 KB SPIFFS-partitsioon

Juurdepääs logidele

Web UI: Re-enable WiFi briefly → view logs with filters (Messages / SOS / System / Errors)
Export: Download logs as JSON or CSV from web UI
Serial: Connect via USB → logs streamed to serial monitor (for developers)
Püsiv: Kõik logid säilivad taaskäivitamisel — neid hoitakse SPIFFS-välkmälus, mitte muutmälus
OLED: Last 3 log entries shown on optional display screen

Factory Reset & Deregister

Reset Levels

Toiming	Trigger	What It Does	Keeps
Soft Reset	Web UI or button click	Restarts the device	Kõik teemad
Deregister	Web UI "Leave Group"	Lahkub rühmast, teavitab partnerseadmeid ja naaseb seadistusse	Nimi + logid
Factory Reset	Hold button 10 seconds	Erases ALL: name, group, logs, config	Mitte midagi

Deregister Flow

Device sends LEAVE_GROUP packet to all peers (both channels)
Teised seadmed eemaldavad selle liikmeloendist ja logivad sündmuse
Device clears group config from NVS but keeps its name and logs
Device restarts WiFi AP → enters setup mode → ready to join a new group

Factory Reset Flow

Hold physical button 10 seconds → LED blinks rapidly as countdown confirmation
10 sekundi järel: LED jääb põlema → NVS-i täielik kustutamine + SPIFFS-i vormindamine → taaskäivitus
Returns to first-boot state with default name Lageeni-XXXX
Kõik logid, sõnumid, rühmaandmed ja sätted kustutatakse jäädavalt
Best-effort LEAVE_GROUP sent before reset (if currently in a group)

Factory Reset is irreversible. Web UI requires typing "RESET" to confirm. Physical button requires 10-second hold to prevent accidental triggers. LED countdown gives visual feedback.

Built-in LED Logic

LED Status Patterns

State	Muster	Description
Booting	Fast blink (5Hz)	Starting up, scanning
Setup Mode	Steady ON	WiFi AP active, waiting for config
Grouped Active	Double pulse / 3s	In group, listening on both channels
Kerge unerežiim	Dim pulse / 5s	Energiasäästlik, kuid endiselt LoRa kaudu kättesaadav
Deep Sleep	VÄLJAS	Hibernating, wakes on timer/interrupt
Message RX	3 kiiret välgatust	Received a message
Message TX	1 pikk välgatus	Sent a message
SOS Countdown	Kiirenevad impulsid	5-sec countdown — press again to cancel
SOS Sending	Rapid red bursts	Broadcasting SOS
SOS Received	SOS pattern (continuous)	Emergency alert from another device
Find Me	Blue SOS blink (10s)	Remote locate triggered by peer
Factory Reset	Fast blink → solid	Countdown → erase complete
Aku tühjeneb	3 aeglast punast välgatust	Battery below 10%
Error	Continuous fast red	LoRa tõrge või kriitiline viga

ESP32 built-in LED is single-color (blue). On RGB boards, actual colors are used. On mono boards, patterns differentiate states.

UI Mockups

http://192.168.4.1 — Setup Mode (WiFi turns OFF after grouping)

Alin Li Lageeni — seadistamine

WiFi: Lageeni-7B01 · Temporary setup

Device Name:

Discovered Devices (LoRa scan):

Ahmed

A4:CF:12:7B:00:02 · RSSI: -42

LoRa

Tent 3

A4:CF:12:7B:00:03 · RSSI: -58

LoRa

Scout

A4:CF:12:7B:00:04 · RSSI: -89 (nõrk)

LoRa

WiFi will turn OFF after grouping to save battery

Ahmedi seade — Wi-Fi ajutiselt lubatud

Ahmedi seade

Group: LAGEENI-A7F3

72%ESP-NOWLoRa

Group Members:

Base Camp 91%

ESP-NOW: -38 · LoRa: -52 · 5s ago

Tent 3 55%

ESP-NOW: -62 · LoRa: -71 · 12s ago

Scout 18%

ESP-NOW: unreachable · LoRa: -89 · 45s ago

Chat with Base Camp · via ESP-NOW (-38 dBm)

We arrived at the river. Water level is high.

Base Camp · 2 min ago · ESP-NOW

Copy that. Taking alternate path.

You · 1 min ago · ESP-NOW

Good. Stay on channel. Update in 30 min.

Base Camp · 30s ago · LoRa

EMERGENCY ALERT

SOS ALERT

From: Ahmed

„Vigastatud jõeületuskohas“

Battery: 34% · GPS: 25.2854, 51.5310 · via LoRa (-65 dBm)

Received 12 seconds ago · ACK sent

Audit Logs — Ahmed's Device

32:05 BOOT Device started · Ahmed · LAGEENI-A7F3
32:06 ESPNOW Partnerseade: Base Camp (A4:CF:12:7B:01)
32:06 LORA Init OK · 433MHz SF7 Sync:0xF3
35:12 MSG_RX Base Camp via ESPNOW → "Water level high"
36:01 MSG_TX → Base Camp ESPNOW "Alternate path"
38:45 SOS_RX Scout → "Lost" (LoRa -89dBm)
38:45 ACK_TX SOS ACK → Scout
02:00 SLEEP Kerge unerežiim · äratus: 5 min

Lisafunktsioonid

GPS Sharing

Valikuline NEO-6M-moodul. Koordinaadid elusolekusignaalides ja SOS-is. Partnerseadmed näevad sinu ligikaudset asukohta. Hädavajalik otsingu- ja päästetöödel.

Buzzer / Siren

Valikuline piesosummer. Käivitub SOS-i vastuvõtul, Find Me kasutamisel, tühjeneva aku korral ja paanikanupu pöördloenduse helisignaalideks. Kuuldav ka siis, kui ekraani pole näha.

Sõnumite edastamine / silmusvõrk

If A can't reach C, B auto-relays the message. Extends effective range to 2–3x single-hop distance. Transparent to the user.

Solar Charging

TP4056 input supports 5V mini solar panel. In deep sleep, a small panel keeps the device running indefinitely — true off-grid operation.

Quick-Reply Templates

Predefined messages selectable by button presses: "OK", "Coming", "Wait", "Help", "Danger", "Safe". No phone needed for basic replies.

Signal Strength Map

Web UI charts RSSI per peer over time. Find optimal device placement, identify dead zones, and test antenna performance.

Check-In Timer

Configurable auto-check-in. If a device misses heartbeats for N minutes, all peers get a "no contact" warning. Catches lost devices.

OLED-ekraani tugi

Valikuline 0.96-tolline SSD1306. Näitab viimast sõnumit, akut, partnerseadmete arvu, signaali ja režiimi. Põhitoimingud ilma telefonita.

Mitmekeelne liides

Web UI in English and Arabic (RTL). Auto-detects browser language. Perfect for bilingual classrooms and Middle East field teams.

AES-128 krüpteerimine

Kõik andmekoormad on krüpteeritud. Igal rühmal on kordumatu võti. ESP-NOW kasutab CCMP-d. Takistab pealtkuulamist rühma mittekuuluvate LoRa vastuvõtjatega.

Auto Low-Battery SOS

At 5% battery, auto-sends "going offline" alert with last GPS to all peers before hibernating. No one is silently lost.

Classroom Mode

Teacher broadcasts quizzes, attendance, group messages. Students respond by button. Great for outdoor lessons with no internet.

Buddy Pair System

Seo kaks seadet. Kui nende ESP-NOW-ühendus kaob N minutiks, saavad mõlemad hoiatuse. Hoiab matkakaaslased ühenduses ja üksteise olukorraga kursis.

Range Test Mode

Dedicated mode to test communication range between two devices. Sends ping-pong packets and displays real-time RSSI and success rate graph.

Öömajakas

LED stays on as dim continuous glow for nighttime visibility. Configurable color and brightness. Helps locate devices in the dark.

Device Health Monitor

Tracks CPU temperature, uptime, free memory, and flash wear. Alerts if device is overheating or running low on storage space.

Hardware Requirements

ESP32 Board

ESP32-WROOM-32 or TTGO LoRa32

LoRa moodul

SX1278 (433MHz) / SX1276 (868MHz)

LoRa antenn

SMA antenna for extended range

LiPo-aku

3.7V 1000–3000mAh + TP4056

Füüsiline nupp

Tactile switch: SOS, wake, navigate

Buzzer (opt.)

Piesosummer heliteavitusteks

OLED (valikuline)

0.96" SSD1306 I2C ekraan

GPS (opt.)

NEO-6M UART GPS-moodul

Solar (opt.)

5V mini panel + TP4056

Enclosure

3D-prinditud korpus või projektikarp

Recommended: TTGO LoRa32 V2.1Kõik-ühes plaat: ESP32 + SX1278 + OLED + akuühendus + laadimisahel. Lisa vaid nupp, antenn ja aku — kasutusvalmis!

Technical Specifications

Frequency: 433 MHz (configurable: 868/915 MHz)
Spreading Factor: SF7–SF12 (configurable for range vs speed)
Bandwidth: Vaikimisi 125 kHz
TX Power: 17 dBm
Sync Word: Unique per group
Range: 1–3 km linnas, 5–15 km avamaal
DIO0 Interrupt: Wakes ESP32 from deep sleep on incoming packet

Protocol: Espressif ESP-NOW (802.11 vendor action frames)
Range: 200–500m avamaal
Latency: 1–5 ms
Partnerseadmete ülempiir: Kokku 20 (ESP32-l kuni 10 krüpteeritud)
Koormus: 250 baiti paketi kohta
Encryption: CCMP (hardware-level)

Usage: Temporary AP during setup, user-triggered re-enable
SSID: „Lageeni-XXXX“ (igal seadmel kordumatu)
Security: WPA2-PSK
Web Server: ESPAsyncWebServer port 80
mDNS: lageeni.local
Auto-Off: 5 min after last client disconnects

// Seadistusfaas (WiFi AP aktiivne) GET /api/status // Seadme info ja aku POST /api/rename // Määra seadme nimi GET /api/discover // Loetle leitud võrdseadmed POST /api/group // Rühmita kõik seadmed // Käitusaeg (WiFi uuesti lubatud) GET /api/members // Rühma liikmed + olek POST /api/send // Saada {to, msg} POST /api/broadcast // Leviedasta {msg} POST /api/sos // Käivita SOS {message?} POST /api/sos/cancel // Tühista aktiivne SOS POST /api/led // Kaug-LED {target} GET /api/messages // Sõnumiajalugu GET /api/logs // Täielik auditilogi GET /api/logs/sos // Ainult SOS-i logi GET /api/logs/export // Laadi CSV/JSON alla POST /api/sleep // Sisene unerežiimi {mode} POST /api/wifi-off // Keela WiFi POST /api/deregister // Lahku rühmast POST /api/factory-reset // Lähtesta {confirm}

PlatformIO — Build system and project management
Arduino ESP32 Core — Framework
LoRa (Sandeep Mistry) — SX1278/SX1276 driver
ESP-NOW — Built-in ESP-IDF peer-to-peer API
ESPAsyncWebServer + AsyncTCP — Non-blocking web server
ArduinoJson — JSON serialization
SPIFFS — Flash file system for UI and logs
Preferences (NVS) — Key-value persistent storage
TinyGPS++ — GPS parsing (optional)
SSD1306Wire — OLED driver (optional)
mbedTLS — AES-128 encryption (built into ESP-IDF)

Ready to Build?

Confirm Solution & Start Coding

Review the full architecture, flows, and specifications above. Once confirmed, we build the complete PlatformIO firmware with ESP-NOW + LoRa dual-layer communication.

LoRa + ESP-NOW püsivara

Web UI (SPIFFS)

SOS + Logs

Sleep Modes + Battery

PlatformIO seadistus

Setup Guide