DL-02 Datalogger is a high-end integrated data logging solution specifically designed for rainfall monitoring stations, featuring the following outstanding characteristics:
- A 3-core microcontroller architecture including 2 main cores and 1 low-power core, enabling multitasking capability and optimized energy consumption;
- Fully compliant with datalogger standards, including a high-precision independent RTC clock and external SD card for backup data storage;
- Comprehensive interfaces compatible with common rain sensors such as Modbus RTU RS485/RS232, 4–20mA 24-bit, 0–10V / 0–20mA / 0–5V, and a high-speed Digital Input port configurable for rain gauges with 0.5mm / 0.2mm / 0.1mm resolution;
- Integrated communication modules including WiFi and GSM/2G/3G/4G;
- Fully compliant with the Center Data Hub (CDH) data structure of the Vietnam Meteorological and Hydrological Administration (VNMHA), supporting simultaneous data transmission to multiple servers (minimum of 3 servers);
- Simple parameter configuration, fully integrated with IoT platform servers, providing comprehensive remote server accessibility;
- Automatic data retransmission when communication is interrupted, or data retrieval from the SD memory card;
- Low power consumption with outstanding longevity;
- Cost-effective solution thanks to its high level of integration.
| CONTENT |
SPECIFICATIONS |
| Microcontroller |
01 Dual Core 32-bit 240MHz and 01 Ultra-low-power Core, 448KB ROM, 520KB SRAM, 16KB SRAM RTC, 16MB FLASH |
| Memory |
01 micro SD card slot, default 32GB included |
| Display |
1.3-inch OLED display |
| Real-time clock |
High-precision independent RTC ensuring accurate timestamping of data |
| Integrated communication |
- GSM/2G/3G/4G LTE: 01 SIM (compatible with existing mobile carriers in Vietnam)
- WiFi: 802.11 b/g/n/e, 10/100Mbps
- Bluetooth: BR/EDR & BLE v4.2 (optional)
- External SMS/2G/3G/4G antenna for weak signal conditions
|
| Device interfaces |
- 01 Modbus RS485/RS232 communication port
- 01 Digital Input port, pulse frequency counter: 0Hz to 1kHz, configurable rainfall resolution 0.5/0.2/0.1mm via software
- 01 Analog input 4–20mA, 01 input 0–5V
- 01 USB 2.0 port
- Isolated power output 24VDC and 12VDC for sensors
|
| Software features |
- Communication protocols: FTP, TCP/UDP IP, HTTP, MQTT
- Data formats: ASCII, JSON / CSV / TXT files
- Local configuration via WiFi AP using WebConfig or remotely via Internet (4G) or SMS through server APIs
- Sensor sampling and data transmission interval adjustable from 10 seconds to 24 hours
- Automatic data retransmission to server after offline period
- OTA firmware upgrade supported
|
| Power supply |
Default input: 4.5V – 40VDC, 15W |
| Operating environment |
- Temperature: -10℃ to +80℃
- Humidity: 0 – 99%RH (non-condensing)
|
| Enclosure material |
Premium aluminum
Lightweight, high heat resistance, excellent corrosion resistance
|
| Independent monitoring circuit |
Full system monitoring circuit (microcontroller, SIM) with automatic reset in case of system crash |
| Protection |
- E-fuse protection against overvoltage, undervoltage, overload, overcurrent, and TVS lightning protection
- Datalogger system temperature monitoring (mainboard)
- Anti-interference protection for motherboard, power supply, and I/O ports
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