YO H2O

Overview

Description

YO H2O is a LoRaWAN-enabled device designed for efficient flood detection and environmental monitoring. In addition to detecting potential floods, it measures temperature and humidity while transmitting position data along the X, Y, and Z axes using its built-in accelerometer. Ideal for remote or urban deployment, the YO H2O ensures reliable performance in critical monitoring scenarios.

Figure 1. Device top view

Device sticker placed on the bottom of the device enclosure contains information about model, version, LoRaWAN region and 3 parameters important in case of device identification and configuration:

• DEV EUI: 64-bit unique device identifier in a LoRaWAN network,
• DEV ADDR: address required to connect via ABP activation type to LoRaWAN,
• BLE MAC: Bluetooth physical address.

Figure 2. Device sticker

Features

• LoRaWAN Technology: Available in multiple versions with LoRa radio configured for various regions and ISM frequency bands (e.g., EU868, US915, AU915), it is compatible with both private and public LoRaWAN networks and supports connections via ABP (Activation by Personalization) or OTAA (Over-The-Air Activation).
• Bluetooth Low Energy (BLE): Enables easy configuration through a user-friendly JSON data exchange format, supports firmware updates via OTA (Over-the-Air), and boasts very low energy consumption.
• Battery-Powered: CR2450 featuring very low self-discharge, ensuring long-term operation without the need for an external power supply.
• Temperature and Relative Humidity: Measures temperature and relative humidity within the device enclosure, providing valuable insights into the surrounding environment.
• Flood Detection: Instantly detects potential floods to enable rapid response and mitigate risks.
• Accelerometer: Provides position data on the X, Y, and Z axes for precise movement and orientation tracking.
• Yosensi Management Platform: Provides a web tool for device configuration, firmware updates, and infrastructure management. Enables comprehensive monitoring of transmitted data and easy device management.
• Yosensi Mobile App: Effortlessly manage devices with features to register new ones, configure settings, perform firmware updates, view/send logs, and test LoRaWAN connectivity. Learn more in our detailed Yosensi App blog post.

Specifications

Physical

Figure 3. Dimensions of the device

Device

Attribute	Description
Dimensions	Height: 13 mm Diameter: 47 mm
Colour	Light grey Black
Mounting method	No handles
Enclosure material	ABS
Level of protection	IP40
Weight	18.6 g (without batteries)

Operating Conditions

°C°F

Attribute	Description
Temperature	0°C to 70°C
Humidity	0 to 90%
Placement	Indoor use
Power supply	CR2450 3 V
Power consumption	Maximum: 110 mA DC (3 V DC)

Measured Values

°C°F

Parameter	Measurement range	Accuracy
Temperature (internal)	-40°C to 125°C	±0.2°C (5°C to 60°C)
Relative humidity (internal)	0% to 100%	±2% (20% to 80%)
Flood detection	0 - dry, 1 - flood detected	-
Accelerometer	±90° on X and Y axes 0-180° on Z axis	±0.1° (-40°C to 85°C)

Controls and Indicators

LED Status Indicator

YO H2O communicates its current behaviour to the user by RGBW LED placed on the top.

Diode statuses interpretation

Behavior	Colour	Status
Single flash	Green	General: device is working correctly (power and memory).
Single flash	Red	General: device is working incorrectly (power and memory). LoRaWAN communication: failed to receive an acknowledgement from LoRaWAN Server within specified timeout.
Single flash	White	LoRaWAN communication: LoRaWAN frame sent / confirmation from LoRaWAN Server after receiving the frame.
Slow flashing	Blue	BLE communication: connection to the device via BLE (configuration).
Rapid flashing	Blue	LoRaWAN communication: connecting to LoRaWAN network.

Buttons

The YO H2O has a button for resetting the device. Figure 4 shows its placement. To reboot the device, press the reset button for a moment.

Figure 4. Reset button

Installation

Package Contents

1. Device (without batteries).
2. Warranty card.

Safety Precautions

NOTE

Go to the Safety Precautions section to see important information on handling, disposal and maintenance.

Installation Guide

1. Unscrew the device: remove 4 screws from the enclosure.

Figure 5. Device opening instructions

2. Place CR2450 3 V battery in the device according to the polarity.

Figure 6. Device battery assembling instructions

3. Assemble the device. The order of the elements is important:

• Place the PCB (B) at the top of the enclosure (A)
• Then insert the seal (C)
• Fit the bottom part of the enclosure (D)
  

Important! Before assembling the device, be sure to check the tips in the following pictures.

Figure 7. Assemble device instruction

Tip 1: Adjust the flood probes as shown in the image below:

Figure 8. Tip 1 Assembly

Tip 2: Match the PCB (marked component) to the top enclosure to the according to the diagram:

Figure 9. Tip 2 Assembly

4. The device is on. Screw it back together.

Figure 10. Assembled device top view

Configuration

Configurable Parameters

A few parameters must be set before sending data to the gateway. The default firmware is configured in OTAA mode with predefined deveui, appkey (OTAA) and appskey, nwkskey (ABP).

Configuration of the device is stored in a JSON file divided into the following sections:

• info (generic, read only): information about the device,
• lorawan (generic): configuration data for LoRaWAN connection,
• ble (generic): Bluetooth settings,
• device (dynamic): individual configuration for a specific device (this section’s structure differs for each device),

Sample configuration file for the YO H2O device.

{
	"info": {
		"devmodel": "LNFD",
		"fwver": "3.6.2",
		"loraradio": "SX1261",
		"lorawanver": "1.0.2",
		"loraregion": "EU868",
		"blemacaddr": "0123456789ab"
	},
	"lorawan": {
		"subband": 1,
		"nwktype": "public",
		"acttype": "otaa",
		"otaa": {
			"deveui": "0123456789abcdef",
			"appeui": "fedcba9876543210",
			"appkey": "000102030405060708090a0b0c0d0e0f",
			"trials": 1
		},
		"abp": {
			"devaddr": "01234567",
			"nwkskey": "0123456789abcdef0123456789abcdef",
			"appskey": "000102030405060708090a0b0c0d0e0f"
	}
	},
	"ble": {
		"power": 0,
		"interval": 900
	},
	"device": {
		"measinterval": 28800,
		"bleuptime": 86400,
		"blepwr": 0,
    	"bleadvinterval": 9000
	}
}

OTAA & ABP

OTAA	ABP
Device EUI	Device Address
Application EUI	Network Session Key
Application Key	Application Session Key
Number of Trials

Generic Parameters

Generic Parameters for Yosensi Devices.

Click here to see the generic parameters for Yosensi devices.

Parameters

Device Parameters

Name	Description	Possible Values	Default Value	Read/Write
measinterval	Measuring and sending interval LoRa [s]	601-999999	7200	R/W
bleuptime	Bluetooth LE uptime [s]	1-999999	86400	R/W
blepwr	Bluetooth LE transmit power [dBm]	0-99	0	R/W
bleadvinterval	Bluetooth LE advertising interval [ms]	10-9999	9000	R/W
OTAA minimum 60 [s], ABP minimum 120 [s]

Parameters description

• nwktype: used for setting the device in public or private network type.
• acttype: used for setting the device in ABP or OTAA mode.
• deveui, … , appskey: predefined addresses and keys, these parameters are generated using multiple IDs specific to the particular MCU and are unique for each device. They can be changed if needed.
• interval: determines the interval of sending broadcast packets, used to connect to every BLE receiver around the device.
• subband: used for setting the communication frequency sub-band in LoRaWAN.
• measinterval: measurement interval [s] between sending LoRa packets.
• bleuptime: time in seconds after Bluetooth advertising parameters conguration will change to those set in the “device” section. Unless the user shakes the device or the device detects a leak, then parameters “blepwr” and “bleadvinterval” are equal to the parameters given in the “ble” section. It helps the device to work longer on a single battery.
• blepwr: indicates the Bluetooth LE transmit power [dBm]. In YO H2O Bluetooth power changes after the time period set in the “bleuptime” parameter to the given value in the device section.
• bleadvinterval: indicates the Bluetooth LE advertising interval [ms]. In YO H2O Bluetooth advertising interval changes after the time period set in “bleuptime” parameter to the given value in the device section.

Downlink message

You can remotely adjust certain parameters by sending a downlink message through our platform. Simply navigate to the "COMMANDS" section for the selected device.

Update Measurement Interval

It is possible to change the measurement interval (measinterval) by using downlink. Information about changing the parameter will be sent from the server via the gateway.

Example of Downlink Message:

• Prefix: 0x03
• Measurement Index: 0x00
• Data (up to 4 bytes in hex): 0258

Sample Downlink: 0x03000258 - Sets a measurement interval of 600 seconds (10 minutes).

Connecting Nodes to the Network with Yosensi Management Platform

Click here to see how to connect a node using the Yosensi Management Platform.

Node Configuration with Yosensi Management Platform

See how to configure a node in Yosensi Management Platform

Node Configuration via Yosensi Mobile Application

Check how to adopt and configure a node via the Yosensi App.

Frequency Plan

Take a look at the list of frequency plans used in Yosensi.

Payload Description

This datasheet describes the payload protocol developed by Yosensi for communicating with our devices.

Payload Decoder

If you want to connect to your own server, it is necessary to decode the specific payload for each device. To accomplish this, a payload decoder is required, which can be downloaded using the following link: Payload decoder. You can also use our integrated Payload Decoder here. Extended documentation of the protocol can be found in the Payload description on our website.