1. General introduction
Solution MEI Group Provide monitoring system Remote temperature and humidity application LoRa E32 technology Super energy saving.
Each sensor node works by rechargeable battery, transmit data over the network Long range LoRa, and maintainable 3 months of continuous operation. When the battery is low, the system Send warnings to the center to actively recharge.
Data is collected The central server uses a Raspberry Pi embedded computer combine SSD storage and backup mechanism synchronized to the MEI ECO Cloud server, ensuring data safety and integrity.
2. System structure
LoRa sensor node (E32):
Microcontroller STM32/ESP32 combine module LoRa E32-433T20D.
Measurement sensor temperature - humidity SHT31/DHT22 High precision.
Li-ion rechargeable battery average activity 3 months/charge.
DeepSleep mode consumes only a few µA while waiting.
When the battery is low, node sends a “Low Battery” warning to the central Gateway.
Central Gateway (Raspberry Pi + SSD):
Collect LoRa data from nodes within a few kilometers.
Write the data down SSD 128–256 GB Helps increase durability and access speed.
Connect LAN/WiFi/4G to transmit data Server MEI ECO Cloud via MQTT or HTTPS.
There is a mechanism Local self-backup when losing one's life, and resynchronize automatically when the connection restores.
Server MEI ECO Cloud:
Store data centrally, preserve and synchronize information from multiple Gateways.
Display graph, warning temperature - humidity threshold, battery status above Web Dashboard or MEI ECO App.
Provide API RESTful for SCADA or other management system.
3. Outstanding features
Super energy saving: Each node only transmits data periodically (for example every 5–10 minutes), the rest are in deep sleep mode.
Long operating time: Rechargeable battery to use 3 months, can be recharged many times.
Smart warnings: Automatically send notifications when battery is low or temperature/humidity threshold is exceeded.
Long distance – stable transmission: LoRa E32 coverage 1–3 km in industrial environments.
Safe storage: SSD + mechanism Multi-level backup (Node → Gateway → Server).
Intuitive interface: Web/App displays realtime, alerts, charts and data history.
4. Practical application
Cold storage, food and pharmaceutical processing factory.
Smart agriculture, greenhouse, environmental station.
Server rooms, storage warehouses, remote technical electrical cabinets.
5. Advantages in the MEI ecosystem
Fully compatible with MEI ECO Platform (MQTT, Cloud, Dashboard).
Easy integration with other monitoring systems.
Flexible expansion: add new node without reconfiguring Gateway.
Data integrity: automatic backup & synchronization mechanism between Raspberry Pi and MEI server.
