Name: DFRobot Lark Weather Station EDU0157-EN
Brand: DFRobot
SKU: 6585114e0442dacd79859540
Price: 1248.0 HKD
Availability: InStock

DFRobot Lark Weather Station EDU0157-EN

DFRobot Lark Weather Station (EDU0157-EN) is an exceptionally compact weather station that provides key weather data such as wind speed, wind direction, temperature, humidity, and atmospheric pressure.

HK$1,248.00

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DFRobot Lark Weather Station (EDU0157-EN)

Introduction

Lark Weather Station's height is 16cm and diameter is 5.5cm so easy to carry and storeage

5 elements measurement, physical quantity output, support I2C/UART communication mode, Built-in storage with compact size

Highlights

The Earth's atmosphere is a dynamic and intricate system influenced by various factors, with wind speed, wind direction, temperature, humidity, and air pressure being pivotal.

A comprehensive understanding of atmospheric movement necessitates precise detection and recording of these elements.

Traditionally, acquiring meteorological data involved a cumbersome process of integrating multiple sensors, requiring time-consuming wiring, programming, debugging, and assembly. This posed significant challenges for educators and students interested in meteorological research.

Moreover, existing commercial weather stations are often specialized weather monitoring equipment that cannot be developed twice and lack adaptability, thus falling short in meeting the diverse needs of research

To address these issues, we present the Lark Weather Station

The Lark adopts a modular shell design, allowing for the expansion of additional sensors to collect a wider range of meteorological data, meeting diverse user needs for weather exploration.

Product Parameters

Name	Data
Working Voltage	3.3～5.5V DC
Working Current	40mA
Sleep Current	2mA
Communication Mode	I2C / UART
Wind Speed	0.5~12m/s
Wind Direction	Eight directions
Temperature	-20~60℃ ±0.2℃
Humidity	0~99%RH ±2%RH
Air Pressure	300~1100hPa ±1Pa
USB Disk	16M
Main Body Size	160x55mm
Main Body Weight	270g

Structural Overview

Name	Function
Compass	Assists in orientation identification
Anemometer	Wind speed detection device, works with internal sensor to measure wind speed
Anemometer Cover	Protects the anemometer cups when stored; should be removed when using the compass
Louvere Box	Ensures air circulation, used for temperature, humidity, and air pressure detection
Wind Vane	Wind direction detection device, works with wind direction shaft and internal sensor to measure wind direction
Wind Direction Shaft	Rotates driven by the wind vane, used for wind direction detection
Gravity Interface	Supports I2C/UART communication, can interact with development boards like Arduino
Type-C Interface	Used for configuration or data export
Adjustable Tripod	Supports the weather station
Expansion Port	Connects to the battery and data transmission module in the expansion bin
1/4 Inch Thread Hole	Used to secure the weather station, can be connected to a tripod
Firmware Upgrade	Upgrades the system firmware

Function Description

Wind Direction Measurement

Please calibrate the orientation of the weather station each time it is started to ensure accuracy. Adjust the angle of the weather station so that the Type-C interface faces the direction pointed by the S on the compass, i.e., align the Type-C port towards the south. Once the weather station starts normally, the yellow light will turn off, at which point you should rotate the wind vane once to complete the calibration

You can use the compass on the cover to assist in calibration. When using the compass, remove the cover and keep it at least 10 cm away from the weather station. Be aware of possible magnetic interference from nearby electronic devices like computers and mobile phones

Parameter Configuration

Connect the weather station to the computer via Type-C, and a 16M USB drive will pop up on the computer. Open the config file in the USB drive

Name	Function	Options	Default
Communication	Set communication mode	I2C/UART (115200)	12C
Sample_rate	Set data sampling rate	1-60S or 1-60M	30S
Record	Set whether to enable data storage	ON/OFF	ON
Delay_record	Set delay start time for storage	10~60	10S
Light_Switch	Set whether RGB light is always on	ON/OFF	OFF
Low_Power	Set whether to enable low power mode	ON/OFF	OFF

Data Storage and Export

Connect the weather station to the computer using a Type-C data cable, and open the config file in the popped-up USB drive
In the config file, set the "Record" configuration to "Record:ON". If not modified, it should already be in "Record:ON" by default
Disconnect the weather station from the computer and then connect it to an external power supply
After the weather station starts, it will begin storing data after reaching the time set in "Delay_Record". The interval of data storage is determined by the time set in "Sample_Rate"

Note: When connected to the computer, the weather station only provides data export function and cannot store data

Firmware Upgrade

To avoid data loss during firmware update, back up previously stored CSV files before the update: connect the module to the computer using a Type-C data cable, copy the previous data CSV files from the popped-up USB drive to the computer system, then disconnect the Type-C from the module
Use an M2 screwdriver, SIM card pin, or other pointed tool to insert into the firmware upgrade slot at the bottom of the weather station and press the button inside
While pressing the button, connect the weather station to the computer via the Type-C port. A USB drive named “RPI-RP2” will pop up on the computer, and you can then release the button
Drag the latest ".uf2" firmware file into the "RPI-RP2" USB drive to complete the firmware upgrade

Low Power Mode Description

When the "Low_Power" configuration is set to "Low_Power:ON", low power mode will be enabled
In low power mode, I2C/UART functionality will be disabled, and data cannot be obtained through controllers like Arduino
In low power mode, if not connected to a data transmission module, ensure that the storage function is turned on
In low power mode, the system will wake up periodically to collect data at intervals set in "Sample_Rate". If the storage function is enabled, the collected data will be stored. Note that the minimum value for "Sample_Rate" is 60 seconds; if a shorter interval is set, the system will automatically enforce a 60-second interval
In low power mode, after the weather station is powered on, it will perform a data collection operation and then enter sleep mode. If the storage function is enabled, the collected data will be stored before entering sleep
In low power mode, when the wind vane is blown by the wind and generates motion, the system will wake up for a data collection. If the storage function is enabled, the collected data will be stored, and then the system will re-enter sleep mode

RGB Indicator Light Status Explanation

Yellow Light: The system is initializing, approximately 1 second
Red Light: System anomaly, reasons include abnormal configuration in the config file, internal sensor failure

Explanation: Regardless of whether the Light_Switch is set to ON or OFF, the yellow light will illuminate for 1 second after startup. If there is a system anomaly, the red light will illuminate. When Light_Switch is set to OFF, the indicator light will usually be off after a normal startup and will briefly light up when data is stored. When Light_Switch is set to ON, the indicator light will usually be on continuously and will turn off briefly when data is stored

Green Light: Current communication mode is I2C
Blue Light: Current communication mode is UART
Green Light Flashing: Data is being stored, and the current communication mode is I2C
Blue Light Flashing: Data is being stored, and the current communication mode is UART
When Light_Switch is set to OFF, the indicator light is usually off and will flash when data is stored

System Time Setting

The Lark can set the time through the config file in the USB drive. Add a new line in the config file and enter “Time:2023/7/24/17:56:15”, then save. After restarting the Lark, it will automatically read and update the system time based on the time set in the config

Explanation: When setting the time using the config file, it is recommended to set the time 10 seconds ahead of the actual time to allow for system initialization and operation time. During system initialization, it will automatically check for the Time tag and corresponding data in the config file. If found, the system time will be updated, and the Time tag and data in the config file will be cleared to prevent resetting the time during the next startup
Note: There is a blank line at the end of the config file. If this blank line is deleted, it will cause abnormalities. When manually adding “Time:2023/7/24/17:56:15”, ensure there is a blank line at the end

The system time can also be set through code, as detailed in the UNO Tutorial and UNIHIKER Tutorial sections and visit https://rb.gy/7wx9z3

Power Supply & Reserved Communication Port Explanation

Name	Function
V_GNSS	Independent power supply port for positioning module
VBAT2	Charging port, connect to battery positive
GND	Battery negative terminal
VBAT1	Battery positive terminal
V_DTU	Independent power supply port for communication module
GND	System ground
SCL	I2C clock
SDA	I2C data

A battery installation space is reserved in the expansion bay. If you install the battery yourself without using the expansion bay, pay attention to the direction of the positive and negative terminals. Incorrect connection can cause damag

When connecting a rechargeable battery yourself, both VBAT1 and VBAT2 should be connected to the battery positive terminal. VBAT1 is for powering the Lark, and VBAT2 is for charging the battery

Quick Start

Before You Start

5V Mobile Power Supply/5V Adapter *1
Computer *1

STEP 1: Assemble

Align the wind vane with the slot on the wind direction shaft and gently press to complete the installation. To remove, gently press to pop it out, and do not pull forcefully
Connect the tripod to the 1/4-inch thread hole at the bottom of the weather station

STEP 2: Data Collection

Connect a 5V mobile power source or 5V adapter to the Type-C interface of the weather station to power it
Please calibrate the orientation of the weather station each time it is started to ensure accuracy. Adjust the angle of the weather station so that the Type-C interface faces the direction pointed by the compass S, i.e., align the Type-C port towards the south. Once the weather station starts up normally, the yellow light will turn off. At this time, you need to rotate the wind vane once to complete the wind direction calibration
After calibration, wait for 10 seconds. The weather station will automatically start data collection and storage, defaulting to collect and store data every 30 seconds. The Venetian blind will flash green when storing data

Note: At this time, do not power the weather station directly from a computer. If you connect the computer to the weather station, the weather station will only provide data export functionality and will not be able to store data

STEP 3: Data Export

After data collection is complete, first disconnect the weather station from the 5V power source. Connect the computer to the Type-C interface of the weather station, and a USB drive will pop up on the computer
Open the USB drive, locate the latest CSV file, and open it to view the recorded data