RAK10702 Indoor Comfort Node Datasheet

Overview

Description

The RAK10702 WisBlock Indoor Comfort Node is an indoor air quality sensor kit. It features measurement of CO2, particulate matter, VOC (volatile organic components), temperature, humidity, and light and has in addition a PIR sensor to detect room occupancy.

It is a feature-packed air quality sensing device for application development. This device can be used as a quick prototyping tool for Internet-of-Things (IoT) and LoRaWAN Integration. The Indoor Comfort Node comes with an open-source firmware that covers all sensors and functionality. If this firmware doesn't cover your needs, you can use it as a base to develop your firmware.

Features

• Supports sleep mode, low power consumption
• Nordic nRF52840 MCU combined with the Semtech SX1262 LoRa transceiver for powerful, yet low-power applications and additional BLE functionality.
• Sensirion SCD30 CO2 Sensor: CO2 sensor with a measurement range from 400 ppm to 10,000 ppm and an accuracy of ±(30 ppm + 3%)
• Plantower PM sensor: Particle Matter Sensor module allows to capture standard PM1.0, PM2.5, and PM10 values.
• Sensirion SGP40 VOC Sensor: Detects a wide range of Volatile Organic Compounds (VOCs) with a measurement range of 0 to 1000 ppm (Ethanol in clean air), combined with the Sensorion VOC algorithms it delivers a VOC index from 0 to 500.
• Vishay Semiconductor VEML7700 Light Sensor: Can measure light exposure with an ambient light range from 0 lx to about 120,000 lx with a resolution of 0.0036 lx.
• Sensirion SHTC3 Temperature and Humidity Sensor: Low power T&H sensor with a temperature sensor accuracy of ±0.2° C, a temperature range from -40° C to +125° C, a humidity sensor accuracy of ±2.0% RH and a humidity range from 0 to 100%
• Senba Technology AM312 PIR Sensor: Detects occupancy and motion from infrared radiated objects.
• RGB LED: Shows the air quality status in 3 levels.
• Micro Crystal RV-3028-C7 RTC Module: Keeps the real-time accurate on the device.
• Button: To switch between display variants, enable BLE for debug or firmware updates and show hardware device information
• LoRaWAN 1.0.2 Standard support - ABP or OTAA mode
• LoRa P2P support
• LoRa and BLE antenna are integrated inside the casing
• Micro USB for configuration
• Supports global license-free frequency band: RU864, IN865, EU868, RU864, US915, AU915, KR920, and AS923
• (Optional) E-Ink Display: Shows the current values of all integrated sensors, with a resolution of 400x300 pixel
• (Optional) 3D printed enclosure in SLS quality: Perfect protection for the Indoor Comfort Node with a flexible mounting option
• (Optional) Open-sourced enclosure design for 3D printed enclosures: Enclosure design available in different 3D formats to either print your enclosure or use it as a base for your enclosure design

Specifications

Overview

The overview shows the RAK10702 WisBlock Indoor Comfort Node with the optional E-Ink display and the optional enclosure.

Figure 1: RAK10702 WisBlock Indoor Comfort Node

Block Diagram

The block diagram in Figure 2 shows the different WisBlock modules used in the RAK10702 WisBlock Indoor Comfort Node and their position.

Modules on the RAK13013 sensor carrier

Figure 2: RAK10702 WisBlock Indoor Comfort Node Block Diagram

Modules on the top side of the RAK19024 Base Board

Figure 3: RAK10702 WisBlock Indoor Comfort Node Block Diagram

Modules on the bottom side of the RAK19024 Base Board

Figure 4: RAK10702 WisBlock Indoor Comfort Node Block Diagram

Hardware

The hardware of the RAK10702 WisBlock Indoor Comfort Node is built with a custom Base Board (RAK19024) with integrated RAK4630, a custom WisBlock Module carrier (RAK13013) and several WisBlock Sensor and IO modules.

Interfaces

The RAK10702 WisBlock Indoor Comfort Node has multiple interface options:

• USB interface
• UART pin header
• I2C pin header
• SWD/JLink header
• 5-24 V supply connector
• Reset button

Figure 5: RAK10702 WisBlock Indoor Comfort Node Interfaces

Pin Definition

USB Interface

Standard USB Type C connector, only USB serial and power supply supported.

Figure 6: RAK10702 WisBlock Indoor Comfort Node UART

UART Pin Header

The UART pin header allows to connect to the RAK4630 module for debugging purposes or to connect additional modules with a 3.3 V UART interface:

Figure 7: RAK10702 WisBlock Indoor Comfort Node UART

Pin	Pin Name	Description
1	Unused	-
2	GND	Ground connection
3	TX	data transmit, max 3.3 V, connected to P0.16/UART2_TX of RAK4630
4	RX	data receive, max 3.3 V, connected to P0.15/UART2_RX of RAK4630

I2C Pin Header

The I2C pin header allows to connection of external I2C devices to the RAK10702. The pinout is compatible with the WisBlock Base Boards:

Figure 8: RAK10702 WisBlock Indoor Comfort Node I2C

Pin	Pin Name	Description
1	VCC	3.3 V output
2	GND	Ground connection
3	SCL	clock, max 3.3 V, connected to P0.14/I2C_SCL of RAK4630
4	SDA	data, max 3.3 V, connected to P0.13/I2C_SCL of RAK4630

SWD/Jlink Pin Header

The SWD/JLink pin header allows to flash firmware and debug firmware using a JLink adapter or a DAPLink adapter:

Figure 9: RAK10702 WisBlock Indoor Comfort Node SWD

Pin	Pin Name	Description
1	VCC	3.3 V output, voltage reference for JLink
2	IO	SWDIO data transmission
3	CLK	SWCLK clock
4	GND	Ground connection
5	RESET	MCU reset connection

5-24V Supply Connector

The 5-24  V supply connector is for the power supply of the RAK10702 WisBlock Indoor Comfort Node:

Figure 10: RAK10702 WisBlock Indoor Comfort Node Supply

Pin	Pin Name	Description
1	VCC	5-24 V input
2	GND	Ground connection

warning

When connecting an external supply, make sure

• The voltage is not below 5 V or exceeds 24 V in any case (including voltage spikes)
• The polarity of the connection is correct

RF Characteristics

Operating Frequencies

The RAK4630 module used in the RAK10702 WisBlock Indoor Comfort Node supports the LoRaWAN bands shown in the table below.

Region	Frequency (MHz)
Russia	RU864
India	IN865
Europe	EU868
North America	US915
Canada	US915
Australia	AU915
Korea	KR920
Asia	AS923-1/2/3

Antennas

The RAK10702 WisBlock Indoor Comfort Node has a built-in LoRa and BLE Antenna.

Power Supply

The RAK10702 WisBlock Indoor Comfort Node can be supplied with a DC voltage from 5 to 24  V through the screw terminal. Alternatively, the device can be supplied through the USB connector.

Figure 11: Power supply connector

warning

When connecting an external supply, make sure

• the voltage is not below 5V or exceeds 24V in any case (including voltage spikes)
• the polarity of the connection is correct

Environmental Characteristics

The table below lists the operation and storage temperature requirements.

Parameter	Min.	Typical	Max.
Operation Temp. Range	-40 C	+25 °C	+60 °C

Firmware

Download the latest firmware version of RAK10702 WisBlock Indoor Comfort Node in the table provided below.

Model	Version	Source
RAK10702 firmware for USB or BLE DFU	V1.0.0	Download
RAK10702 firmware for UF2 file update	V1.0.0	Download

Flashing the Updated Firmware over USB

1. Download the latest firmware to a folder on your computer.
2. Download the firmware update in the same folder.
3. In the same folder, open the command prompt.
4. Connect the WisBlock GNSS Tracker to the computer using USB.
5. Get the COM port the GNSS Tracker is using, for example, COM19.
6. Flash the new firmware with the command adafruit-nrfutil dfu serial --package RAK10702-Latest.zip -p COM19 -b 115200.

Flashing the Updated Firmware Over USB Using the UF2 File

1. Download the latest UF2 firmware file to your computer. You must extract RAK10702-Latest-UF2.uf2 from this zip file.
2. Connect the RAK10702 to the computer using USB.
3. Press the reset button twice.
4. There should be a new USB drive named RAK4631 on your computer after double-clicking on reset.
5. Open this drive and drag the extracted UF2 file RAK10702-Latest.uf2 to that USB drive. It will overwrite the CURRENT.UF2 file and automatically reset the RAK4631 module in the RAK10702.
6. After reset, the tracker has the updated firmware uploaded.

Flashing the Updated Firmware Over BLE

Using WisBlock Toolbox (Android Only)

1. Download the latest firmware into a folder on your computer.
2. Copy the firmware into a folder on your Android phone.
3. Install WisBlock Toolbox on your Android phone.
4. In the WisBlock Toolbox, open the DFU application.
5. Connect over BLE to the GNSS Tracker.
6. Select the firmware file on the Android device.
7. Push UPLOAD to start flashing the new firmware.

Using nRF Connect (Available for Android and iOS)

1. Download the latest firmware into a folder on your computer.
2. Copy the firmware into a folder on your Android phone.
3. Install the nRF Connect on your phone.
   • Android nRF Connect
   • iOS nRF Connect
4. In the nRF Connect, connect to the GNSS Tracker.
5. Click the DFU button in the top right of the screen.
6. Select the firmware file on the Android device.
7. The upload will start automatically.

Creating Your Own RAK10702 WisBlock Indoor Comfort Node Firmware

Build your own RAK10702 WisBlock Indoor Comfort Node firmware with our open-source code available on the Github Repo. The project structure is for PlatformIO. If you need to use ArduinoIDE, you must rename the file app.cpp to an .INO file to be able to load the file in ArduinoIDE.

You can extend the functionality of the RAK10702 WisBlock Indoor Comfort Node by using these sources. You can write, as well, your own RAK10702 WisBlock Indoor Comfort Node application based on these sources.