The data logger dedicated to hydrological monitoring

Pluvi-ONE is a data logger dedicated to rain monitoring plus other related quantities for hydrological applications where early warnings activities are required. Pluvi-ONE has a series of unique features currently available in a single device and represents the current “state of the art” for rain measurement system and early warnings activity in hydrometric monitoring networks.



  • Linux operating system for data processing and communications. Open architecture based on integrated Linux PC;
  • Smart rain analysis: totals, intensity, mobile total, current total;
  • Integrated web server for real-time data, diagnostic information and data download to Excel files via Internet browser;
  • Alarms: use of instant messaging system MQTT, SMS, email and local digital outputs;
  • 400 Mb large multi-level data memory. Removable 8 Gb external memory;
  • 3G/4G communication, wireless router, Ethernet, WIFI, satellite;
  • Redundant dual system with automatic switch from one mode to another;
  • Data communication protocols: Modbus TCP data, FTP (client/server), SFTP, SMTP, SAP, MQTT, HTTP;
  • Setup of the correction formula for Class A Rain gauges. Management of double Rain gauge with redundancy logics and data quality;
  • Additional inputs for optional sensor: Temperature, RH%, Water Level, Storm front distance;
  • Remote system configuration also via modem, without the need of fixed IP SIM Card with or VPN. Data logger configuration saved on FTP server ready for its upload on a remote Alpha-Log system. Local uploading using USB Flash drive or connected PC;
  • Remote firmware update.

Inputs for analog and digital sensors

  • 2 digital inputs for two independent rain gauges, or double reed relay;
  • 1 dedicated input for storm front distance sensor;
  • 1 analogue input for Pt100 temperature sensor;
  • 1 0 ÷ 2 V input;
  • 1 integrated atmospheric pressure sensor;
  • 1 integrated internal temperature sensor.

Integrated Web server

Pluvi-ONE has a web-server on board. Using any Internet browser you can:

  • View the diagnostic data (system date / time, IP address, battery status, memory status, event / alarm logic, actuator status, etc.);
  • View instant measurements;
  • Download the data in memory to Excel file.

Sensors sampling rate

It is possible to configure the acquisition rate for each input (from 1 second to 12 hours). To limit the energy consumption of the sensors that require power, it is possible to set an advance power supply, with respect to the acquisition (warm-up) which is interrupted immediately after the acquisition itself.

Data processing

Statistical processing of the raw values ​​measured on one or more time bases that can be selected individually for each input (from 1 second to 24 hours).

Calculation of rain intensity

Pluvi-ONE calculates the rain intensity (mm / hr). This parameter is based on the time elapsed between two swings of the rain gauge. For a correct calculation, it is possible to set a maximum time in the absence of tilting beyond which Pluvi-ONE resets the calculation of the rainfall intensity.

Data memory

Pluvi-ONE has a 400 MB circular internal memory and a removable USB external memory (capacity up to 32 GB) with FAT32 file system. The external memory can be read directly from a PC. Pluvi-ONE stores data in ASCII format. The open operating system allows to develop alternative storage formats.

Data transmission devices

It is possible to send data to multiple independent remote servers (up to 3) with different transmission devices:

  • 3G and 4G modem;
  • 3G and 4G router;
  • Ethernet, Wi-Fi;
  • Satellite.

Pluvi-ONE can be simultaneously connected to two transmission devices and automatically choose the best option according to signal availability, thus optimizing communication performance and its cost.

Communication protocols

Pluvi-ONE supports the following communication protocols to send data:

  • FTP (ASCII format);
  • SFTP (ASCII format);
  • SAP (Simple ASCII Protocol, proprietary);
  • Modbus-TCP;
  • MQTT (to Broker MQTT);
  • SMTP (via Email);
  • HTTP (see chapter Integrated web server);
  • SMS.

Data communication rate

Depending on the protocol and transmission device used, it is possible to choose the following data transmission rates to the remote server:

  • Via FTP: at least 3 minutes;
  • Via MQTT: minimum 1 second.

It is possible to set the data communication rate according to the alarm status. For example: increase the communication rate when the intensity of the rain is greater than a certain programmable threshold.

ASCII file format via FTP

Pluvi-ONE can send data files, in ASCII format to one or more FTP servers, whose content can be configured in columns.

Electrical outputs

The outputs are used to power sensors and external devices that can be activated with configurable logics according to the acquired data.
They can become relay outputs with the addition of an external module.

Alerts via SMS, email e MQTT

Sending notifications / alarms:

  • E-mail: with message scheduling and distribution lists. The email contains the file with the data that generated the event attached. Ability to replicate the email message via SMS via Web services that can be activated.
  • SMS: with message programming and distribution lists, up to 5 users. Active only if the device is in low-power mode and connected to Modem 3-4 G.
  • MQTT: Pluvi-ONE can be programmed to send data (instantaneous, processed, alarms) to an MQTT broker server, from which they are conveyed to the programmed users.

Firmware update

The Pluvi-ONE firmware can be updated remotely via the web or locally with a USB pendrive.


Pluvi-ONE can be configured with the LSI LASTEM 3DOM program on a PC and the configuration file can be sent to an FTP server; Pluvi-ONE is programmed to import the configuration file directly from this FTP server. The file can also be saved on a USB flash drive.

Local display

This data logger is equipped with a backlit LCD display (4×20 chrs) for viewing the main diagnostic data.


Pluvi-ONE can manage the switching on and off of an independent camera with programmable actuation logics in order to increase / decrease the number of images according to the programmed events, reducing the system’s power consumption and communication costs.
The IP camera can be connected to the same Router used by Alpha-Log for data communication.

Internal clock update

The internal clock (accuracy 30 seconds / month) is updated through NTP (Network Time Protocol) every time Pluvi-ONE activates an Internet connection. The time zone is defined by the configuration.

Power supply

Pluvi-ONE is powered at 9÷30 Vdc and can charge, with solar panel or mains power supply, an external Pb battery using the integrated regulator.

Electric consumption

The average electrical consumption of Pluvi-ONE is 0.03 W in stand-by and measures, 2.4 W with active communication, this consumption does not include the external transmission device.


Pluvi-ONE can be housed in IP66 boxes, against shock, water, dust and atmospheric agents. Depending on the models, the boxes can also house power systems, communication devices and batteries. In the case of sporadic monitoring, Pluvi-ONE can be housed in a customizable IP66 case.

documents LSI Lastem