Problems
Farms needed resilient drying and irrigation control that works offline in the field, yet syncs securely to the cloud for remote schedules, OTA, and monitoring.
Solution
Devices run fail-safe local logic (auto-temp, product profiles, schedules, pressure cutoffs) while streaming telemetry and accepting twin/direct-method commands for modes, schedules, and OTA—surfaced in the mobile app.
Outcomes
2
Edge device lines
D2C+C2D
Azure IoT path
Offline
LittleFS + RTC
System suite
Devices & mobile. One farm control stack.
Mobigron Dryer Device
ESP32 smart dryer controller with DS18B20 indoor/outdoor sensing, master relay + exhaust fan, TFT/keypad UI, RTC + LittleFS offline state, Wi-Fi/cellular failover, and Azure IoT Hub telemetry plus twin/OTA control. Modes: Auto-Temp, Product (Coconut, Bitter Gourd, Mushroom, Green Chilli), Schedule, and Manual.
Mobigron Mini Irrigation
Single-module irrigation scheduler controlling a main pump and up to 4 valves (15 bitmask combinations), ADS1115 pressure cutoffs, make-before-break valve overlap, TFT/keypad local UI, DS3231 RTC + LittleFS, and Azure IoT MQTT D2C/C2D for modes, schedules, special control, and OTA.
Mobigron Mobile App
Flutter app for the Mobigron fleet—discover dryer and watering devices, run modes and schedules, review dryer history/products, and stay connected to Azure-backed device APIs (api.dev.aggen.lk).
Mobigron E-Commerce Store
Official commercial web store for purchasing Mobigron solar dryer units, multi-fan controllers, smart irrigation modules, and agricultural sensors. Includes full device catalog browsing, specifications, online order flow, and direct integration with farm operations.
- 01
Dryer: DS18B20 sensing, exhaust/master relays, crop product modes, Azure DPS + X.509
- 02
Irrigation mini: 4 valves + pump, ADS1115 pressure safety, schedule/special modes
- 03
Flutter mobile: device list, dryer/irrigation control, schedules, history
Engineered with
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