Lageeni: connected communication

Project Overview

What is Alin Li Lageeni?

Alin Li Lageeni (لاقيني — Arabic for "Find Me / Meet Me") is an open-source, off-grid emergency communication system built on ESP32. It uses two communication layers: 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 SleepOpen Source

Use Cases

Emergency Situations — Natural disasters, power outages, or network failures where cellular/internet is unavailable
Outdoor Adventures — 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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Existing Solutions & What Makes Us Different

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.

Open SourceLoRa MeshMobile AppLarge Community

MeshCore

A newer open-source LoRa mesh firmware (MIT license) with selective packet forwarding instead of flooding. Supports repeaters, room servers, and companion radio modes. Growing community with mobile apps and a web client.

Open SourceSelective RoutingWeb ClientNewer Project

goTenna

A commercial mesh networking device. The consumer version supports text messaging and GPS via a paired smartphone. The Pro version offers military-grade encryption and integration with tactical apps like ATAK. Closed-source and proprietary.

CommercialClosed SourcePhone RequiredMilitary Grade

Garmin inReach

A satellite communicator that connects to the Iridium satellite network for global two-way messaging and SOS with a professional 24/7 rescue monitoring center. Requires a paid subscription. Not a mesh — it's device-to-satellite.

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

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	None — Free	None	None	None	$15–65/mo
Communication	ESP-NOW + LoRa (dual)	LoRa only	LoRa only	Proprietary radio	Iridium satellite
Range	200m–15 km	1–15 km	1–15 km	1–6 km	Global
Phone Required?	No — built-in web UI	Yes (BLE app)	Yes (BLE app)	Yes (BLE app)	Optional
Setup Complexity	1-click group	Moderate (app config)	Moderate (flash + CLI)	Easy (app pairing)	Easy (account setup)
Target Audience	Youth / Education	Hobbyists / DIY	Hobbyists / Technical	Outdoor / Tactical	Outdoor / Pro
SOS System	Dual-channel + ACK + countdown	Basic (via app)	No built-in SOS	Indirect only	24/7 rescue center
Sleep / Battery Save	4 modes (down to 0.01mA)	Power save mode	Sleep optimized	~24h battery life	Days to weeks
Arabic / RTL UI	Yes — built-in	Community translation	No	No	No
Classroom Mode	Yes — quizzes, attendance	No	No	No	No
Audit Logs	Full on-device + export	App-side only	Limited	App-side	Cloud only
Open Source	Yes (MIT)	Yes (GPL-3)	Yes (MIT)	No	No
Mesh Networking	Relay via peers	Flood-based mesh	Selective routing	Mesh capable	No (point-to-satellite)

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.
No phone dependency — 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 fills a unique nicheIt'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.

Why ESP-NOW over WiFi?

WiFi AP is Wrong for Emergency Devices

Maintaining a WiFi Access Point drains the battery fast, requires one device to always be the "router", and creates a single point of failure. For emergency and field use, we need something far leaner and more resilient.

Feature

WiFi AP/STA

ESP-NOW

Power Draw

~150–200 mA continuous

~2–5 mA per burst

Setup Required

SSID, password, DHCP, IP

MAC address only

Single Point of Failure

AP dies = network dies

Peer-to-peer, no master

Range

~30–100 m

~200–500 m (open)

Latency

HTTP overhead (50–200ms)

~1–5 ms (direct)

Sleep Compatible

No (connection drops)

Yes (wake → send → sleep)

Max Peers

10 clients (ESP32 limit)

20 peers (10 encrypted)

Our 3-Layer Architecture Layer 1 — WiFi AP: Only during initial setup. User connects phone → web UI → rename + group. Then WiFi is OFF.
Layer 2 — ESP-NOW: Short-range (200–500m), ultra-low power, for nearby devices.
Layer 3 — LoRa: Long-range (1–15 km), for distant devices and emergency broadcasts.

System Architecture

System Flow

Power On — Temporary WiFi AP

Each ESP32 boots and creates a temporary WiFi AP named "Lageeni-XXXX" (last 4 of MAC). The user connects their phone to this WiFi and opens the web setup page at 192.168.4.1. This is the only time WiFi runs.

Rename Device

On the setup page, the user gives the device a friendly name (e.g., "Ahmed", "Base Camp", "Tent 3"). Saved to NVS flash — persists across reboots.

Scan & Discover Peers

From any device's setup page, the user taps "Scan for Devices". The device broadcasts a LoRa discovery beacon. All powered-on Lageeni devices within range respond with their MAC, name, and LoRa address. The setup page shows discovered devices in real-time. Any device can be the one to initiate grouping — there is no fixed master.

Group All — Click to Join

User clicks "Group All Devices". A GROUP_INIT packet is broadcast via LoRa containing: group ID, encryption key, sync word, and the full device registry. All devices store this config.

WiFi OFF — ESP-NOW + LoRa Active

After grouping, WiFi turns OFF to save battery. All communication switches to ESP-NOW (short-range, low-power) and LoRa (long-range). Smart routing auto-selects the best channel per peer.

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.

Ongoing: Heartbeats & Monitoring

Periodic heartbeats (ESP-NOW every 10s, LoRa every 30s) report battery %, RSSI, and GPS (if available). All devices track each other's online/offline status and signal strength.

Emergency? — SOS with Panic Countdown

Long-press (3s) on button triggers a 5-second visual countdown (can cancel!). After countdown: SOS broadcasts on BOTH channels simultaneously, repeated 3 times. All receiving devices show full-screen alert + LED + buzzer.

Device Renaming

Naming Rules

3–16 characters (shorter to fit LoRa packet size limits)
Only letters, numbers, and spaces — no special characters
Names must be unique within the group
Stored in NVS flash — survives reboots and power loss
Default name: Lageeni-XXXX (last 4 MAC characters)
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 } ] }

After Grouping

All devices store group config in NVS flash
LoRa tunes to agreed frequency and sync word
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

Messaging System

Message Types

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) { // Nearby → ESP-NOW (fast, low power) espnow_send(target.mac, payload) } else if (target.lora_reachable) { // Far → LoRa (long range) lora_send(target.lora_addr, payload) } else { // Unreachable → queue + try relay via nearby peers queue_for_relay(target, payload) } } function sendSOS() { // SOS ALWAYS uses BOTH channels simultaneously espnow_broadcast(sos_payload) lora_broadcast(sos_payload) repeat(3, interval=2000ms) // 3 times, 2s apart }

Message Delivery Rules

Max payload: 200 bytes (LoRa limit) / 250 bytes (ESP-NOW limit)
Each message gets a unique ID to prevent duplicates
Direct messages expect ACK within 3 seconds; 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)
Messages stored locally: last 200 messages in SPIFFS flash
Undelivered messages shown with failure indicator in UI

SOS Emergency System

Life-Safety Design — Works Even on Low BatterySOS uses the absolute minimum power needed for transmission and repeats across both channels to maximize the chance of being received.

How SOS Works

Trigger: Long-press button (3s) OR tap SOS button in web UI
Panic Countdown: 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
On Receive: Full-screen red alert on web UI, rapid LED blink, buzzer siren (if connected)
ACK Required: Every receiving device sends ACK — sender sees who heard them
Logged Permanently: 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": "Injured at river crossing", "repeat": 1, // 1 of 3 "timestamp": 1711000120 }

Predefined Quick SOS Messages

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

"Need help immediately!"
"Injured — send medical help"
"Fire / Danger — evacuate area"
"Need water / supplies"
"Lost — please locate me"
"I'm safe — all clear" (cancels active SOS)

Power Management & Sleep

Power Modes

Mode	WiFi	ESP-NOW	LoRa	Current	Use Case
Setup	ON	OFF	ON	~160 mA	Initial config via web UI
Active	OFF	ON	ON	~80 mA	Normal operation
Light Sleep	OFF	Wake	Listen	~10 mA	Battery saving, still reachable
Deep Sleep	OFF	OFF	Timer	~0.01 mA	Max battery, wakes on timer
SOS Mode	OFF	MAX	MAX	~200 mA	Emergency — all power to TX

Deep Sleep Behavior

Wakes every N minutes (user-configurable: 1, 5, 10, 30 min)
On wake: send heartbeat, check queued LoRa messages, update status, sleep again
LoRa DIO0 interrupt wakes ESP32 immediately on incoming SOS (hardware interrupt)
Physical button press always wakes from any sleep mode
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 pin reads battery voltage through a voltage divider circuit
Battery % included in every heartbeat — all peers see your battery level
Low battery warnings broadcast at 20%, 10%, and 5% thresholds
Estimated runtime displayed in web UI based on current power mode
Support for solar panel charging via TP4056 — indefinite runtime in deep sleep

Logs & Audit Trail

What Gets Logged

Messages: All sent/received (last 200, FIFO — oldest auto-deleted)
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 init failures, ESP-NOW failures, low battery events, relay failures
Signal History: RSSI values per peer over time (useful for range testing)

Log Storage

// Log entry structure { "ts": 1711000120, // Unix timestamp "type": "MSG_RX", // Event type code "from": "Ahmed", "ch": "ESPNOW", // Channel: LORA | ESPNOW "rssi": -65, "data": "Help at river" } // Storage: Messages 200, SOS unlimited, System 500 // Total: ~512 KB SPIFFS partition

Accessing Logs

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)
Persistent: All logs survive reboots — stored in SPIFFS flash, not RAM
OLED: Last 3 log entries shown on optional display screen

Factory Reset & Deregister

Reset Levels

Action	Trigger	What It Does	Keeps
Soft Reset	Web UI or button click	Restarts the device	Everything
Deregister	Web UI "Leave Group"	Leaves group, notifies peers, returns to setup	Name + Logs
Factory Reset	Hold button 10 seconds	Erases ALL: name, group, logs, config	Nothing

Deregister Flow

Device sends LEAVE_GROUP packet to all peers (both channels)
Other devices remove it from their member list and log the event
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
After 10s: LED goes solid → full NVS erase + SPIFFS format → reboot
Returns to first-boot state with default name Lageeni-XXXX
All logs, messages, group data, and settings permanently erased
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	Pattern	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
Light Sleep	Dim pulse / 5s	Power-saving, still reachable via LoRa
Deep Sleep	OFF	Hibernating, wakes on timer/interrupt
Message RX	3 rapid flashes	Received a message
Message TX	1 long flash	Sent a message
SOS Countdown	Accelerating pulses	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
Low Battery	3 slow red blinks	Battery below 10%
Error	Continuous fast red	LoRa failure or critical error

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 — Setup

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 (weak)

LoRa

WiFi will turn OFF after grouping to save battery

Ahmed's Device — WiFi enabled temporarily

Ahmed's Device

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

"Injured at river crossing"

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 Peer: 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 Light sleep · wake: 5 min

Additional Features

GPS Sharing

Optional NEO-6M module. Coordinates in heartbeats and SOS. Peers see your approximate location. Essential for search & rescue.

Buzzer / Siren

Optional piezo buzzer. Activated on SOS receive, Find Me, low battery, and panic countdown beeps. Audible when screen isn't visible.

Message Relay / Mesh

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 Display Support

Optional 0.96" SSD1306. Shows: last message, battery, peer count, signal, mode. Basic operation without a phone.

Multi-Language UI

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

AES-128 Encryption

All payloads encrypted. Unique key per group. ESP-NOW uses CCMP. Prevents eavesdropping from non-group LoRa receivers.

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

Pair two devices. If they lose ESP-NOW contact for N minutes, both get an alert. Keeps hiking partners connected and accountable.

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.

Night Beacon

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 Module

SX1278 (433MHz) / SX1276 (868MHz)

LoRa Antenna

SMA antenna for extended range

LiPo Battery

3.7V 1000–3000mAh + TP4056

Physical Button

Tactile switch: SOS, wake, navigate

Buzzer (opt.)

Piezo buzzer for audio alerts

OLED (opt.)

0.96" SSD1306 I2C display

GPS (opt.)

NEO-6M UART GPS module

Solar (opt.)

5V mini panel + TP4056

Enclosure

3D-printed or project box

Recommended: TTGO LoRa32 V2.1All-in-one board with ESP32 + SX1278 + OLED + battery connector + charge circuit. Just add a button, antenna, and battery — ready to deploy!

Technical Specifications

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

Protocol: Espressif ESP-NOW (802.11 vendor action frames)
Range: 200–500m open area
Latency: 1–5 ms
Max Peers: 20 total (up to 10 encrypted on ESP32)
Payload: 250 bytes per packet
Encryption: CCMP (hardware-level)

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

// Setup phase (WiFi AP active) GET /api/status // Device info, battery POST /api/rename // Set device name GET /api/discover // List discovered peers POST /api/group // Group all devices // Runtime (WiFi re-enabled) GET /api/members // Group members + status POST /api/send // Send {to, msg} POST /api/broadcast // Broadcast {msg} POST /api/sos // Trigger SOS {message?} POST /api/sos/cancel // Cancel active SOS POST /api/led // Remote LED {target} GET /api/messages // Message history GET /api/logs // Full audit log GET /api/logs/sos // SOS-only log GET /api/logs/export // Download CSV/JSON POST /api/sleep // Enter sleep {mode} POST /api/wifi-off // Disable WiFi POST /api/deregister // Leave group POST /api/factory-reset // Reset {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 Firmware

Web UI (SPIFFS)

SOS + Logs

Sleep Modes + Battery

PlatformIO Config

Setup Guide