As the outbreak of the Internet of Things equipment, more and more individuals or companies want to enter a piece of this area. In terms of wearable devices that entries, comprehensive power consumption, connection response time, communication distance and other factors, Bluetooth low power technology is undoubtedly the most ideal wireless communication solution. Moreover, as the Internet of Things ecological circles are constantly improving, the products based on Bluetooth low-power technology will also become more and more, forced this broad market demand, Bo Tong launched a low-power Bluetooth development kit WICED SENSE KIT, use Fast product development in helping companies, individuals, or DIY people.
WICED SENSE Development Kit
WiReless Internet Connectivity For Embedded Devices, is a wireless embedded device development platform for Bo Tong. Among them, Wiced Sense is an easy-to-use, easy-to-understand development kit for low-power Bluetooth design. It is mainly composed of BCM20727S SOC, five micro-electromechanical systems (MEMS), the latest Bluetooth 4.1 software stack, first met wiced. Sense development kit.
WICED SENSE Development Kit
The Wiced Sense Development Kit includes:
Wiced Sense Bluetooth Smart Sensor Tag (Built-in CR2032 Button Battery) * 1
MicroSB line * 1
A quick start description document * 1
As a development kit, Wiced Sense is a packaging or appearance, but also a classic appearance of a product, red black, is a delicate structure design. It is very convenient to carry, and before the pair of panels The search for the anti-lenders are a bit similar (or more winning).
However, you can also see some places that are not thoughtful on wiced Sense. If there is no clear indication at some external interfaces, you need to be familiar with the development documentation, not enough, as shown below.
Wiced Sense Bluetooth Smart Sensor Tag
Note: According to the information provided by Bo Tong, one of the LEDs of Wiced Sense and the application buttons are reserved to user customization.
WICED SENSE motherboard
In order to make a clear understanding of the hardware of Wiced Sense, we take the motherboard to explore.
WICED SENSE motherboard front
First presented in front of us, the motherboard sensor (we temporarily call it a front), and these sensors are provided by ST:
ST temperature, humidity sensor HTS221
ST electronic compass LSM303D
ST screw instrument L3GD20
ST acceleration sensor Lis3DSH
ST air pressure sensor LPS25H
The Wiced Sense motherboard is a green 4-layer PCB board. In the front of the motherboard, in addition to the sensor IC, we can also see the USB transfer dual serial port IC CP2105 provided by Silicon Labs. Therefore, the MicroSB interface is not only Can be used as a power supply, and also has a dual serial port function for development of debugging.
In addition, the WICED SENSE motherboard did not deliberately reduce the area of the PCB board as much as possible, as much as possible, but the overall layout is relatively loose, the space reserved in the PCB board is very large, so that the wiring design is relatively simple. But is this factor? If you look at the other side of the motherboard, the answer may have different (see below)
WICED SENSE motherboard back
Due to the button battery, the buzzer has been designed in the back of the motherboard, accounting for a lot of PCB area in structure processing, which makes the motherboard more smaller, if the engineer of the design product is to make Products have been more exquisite, and these factors are crucial. However, for the development kit, it is not a big problem.
Bo Tong BCM20737S low-power Bluetooth SIP module
On the back of the motherboard, with buzzer, buttons, the three-footed situation is the core device of the development kit - Bo Tong low-power Bluetooth BCM20737S, this only 6.5mm * 6.5mm size SIP module not only integrates Bluetooth Antenna, 24MHz high speed clock, 512KB EEPROM, etc., more integrated software stacks that are compatible with the latest low-power Bluetooth 4.1, see the figure below
Bo Tong low-power Bluetooth SIP module BCM20737S
Boyong BCM20737S features:
ARM Cortex-M3 processor, integrated 512KB EEPROM, 24MHz high speed clock, Bluetooth antenna
SIP package, 6.5 mm × 6.5 mm × 1.2 mm, LGA48-PIN
Working voltage: 1.62V ~ 3.63V
Power consumption: RX: 9.8 ~ 10mA, TX: 9.1 ~ 9.3mA, sleep: 12 ~ 19.2ua, deep sleep: 0.65ua
Sensitivity: -94dBM
Bo Tong Serial Control (BSC), SPI, UART Interface
Profile supported by ROM: battery status, sphygmomanometer, Find Me function, heart rate monitor, proximity sensor, thermometer, weight scale, time, blood glucose monitoring, RSA security library, support Le audio, support NFC pairing label
Support for additional configuration files in RAM: blood glucose monitoring, temperature alarm, location, other custom profiles
In addition to many of the above features, BCM20737S also supports the latest 4.1 specification of the Bluetooth Technology Union. It is to be explained here. In fact, low-power Bluetooth 4.1 does not change in hardware, and existing Bluetooth 4.0 can be upgraded through firmware upgrade. Updated to version 4.1. Bluetooth 4.1 mainly improves the availability of consumers, allowing product developers to innovate, and expand the foundation of Bluetooth technology, making it an important part of the Internet of Things, compared with 4.0, and the following points:
Transmission rate is faster
Support "more than one"
Support IPv6
Simplify device connection
Reduce interference between LTE networks
Back down, no need to replace the chip
Interested in seeing more Bluetooth 4.1 specification that can refer to the Bluetooth Technology Alliance.
Review the characteristics of BCM207373s, you will find that when you use the BCM20737S design of the networked products, you can directly connect the sensor, no need to design the external high-speed crystal, no need to replace the Bluetooth antenna, while reducing the PCB layout while It can also be simple and convenient, accelerated product formation cycle, is it great?
After reading the basic situation of the hardware of the Wiced Sense motherboard, the hardware principle block diagram is as follows:
WICED SENSE motherboard hardware principle block diagram
How to develop
For WICED SENSE development, we only need to complete a few steps to prepare:
Install IDE development tools in the PC side WICED-SMART-SDK-2.1.1.1-Ide-installer.exe (need to register the account of the blog community)
Install wiced sense (CP2015) serial port driver
Install a Wiced Sense application on the mobile device (Apple iOS system, Android)
The first time I use Wiced Sense to remove the insulation plastic sheet at the button battery, open the mobile app (need to open Bluetooth), you can search for the Wiced Sense Kit device, where the app also reserves a Demo demo interface option, Don't take it, go directly to the Wiced Sense Kit interface.
WICED SENSE uses
The APP main interface is a screen that combines a variety of sensor data display, and the data will change according to the different environment of WICED SENSE, including gravity sensing, triaxial acceleration, compass, temperature, humidity, air pressure data, these The function is now achievable on a Wiced Sense, compared to some entry-level Internet of IT networks, which are relatively strong.
For Wiced Sense's factory built-in program, we have no more explore, but you can develop Wiced Sense through Bo Tong's unique Wiced Smart SDK development tools to achieve different functions.
Wiced Smart SDK
Wiced Smart SDK is a software development tool launched by Bo Tong, which is intended to provide a full set of solutions for engineers, such as:
Allow access to external settings, timers, protocol stacks, and profiles
Support ARM REALVIEW RVDS and CODESOURELE G ++ Lite Toolchain
Support in Linux or Windows development
Integrated an Eclipse IDE
Includes application examples
With WICED SMART SDK development tools, engineers can easily and quickly develop secondary development for Wiced Sense Kits. for example:
You can use the buzzer, temperature and humidity sensor, temperature and humidity, change alarm device, temperature and humidity sensor according to WICED SENSE
You can use the Bluetooth signal and the distance relationship as a mobile phone, wallet, key, etc., as a child, pet equivalent distance
You can install the Wiced Sense Suite on the fitness equipment, using accelerometer and electronic compass sensor to correct athletes, etc.
Of course, the secondary development for WICED SENSE is only the first step. We can design the corresponding App applications to achieve the excellent experience of product functions, which requires the development environment of Android or Apple iOS applications to develop the corresponding mobile app software. And these, Bo Tong official community also provides source code and is still slowly improved.
Throughout Wiced Sense, this is a good Internet of Things equipment development tool, based on low-power Bluetooth communication technology, equipped with 5 different sensors, the product appearance is small, but the function is powerful, if you need to deduct the branch in the details, Wiced Sense does have a deficiency, such as the product function is not enough, the software development package is difficult to download, the information is still not enough.
summary
Introduced the low-power Bluetooth WICED SENSE development kit for the Internet application, wiced Sense is based on the powerful BCM20737S SIP module, built-in Bluetooth antenna, 24MHz high-speed crystal, EEPROM, the latest Bluetooth 4.1 software stack, etc. And equipped with 5 different functions of STMicos, is also equipped with Bo Tong's unique WICED Smart SDK development tool (providing resources such as code routines), allowing engineers to make engineers for low-power Bluetooth technology. Networking sensing equipment for learning, development. In short, Wiced Sense is a "semi-finished product" between development tools and products, you can use to develop learning, you can also use him to use it as a product is so simple.
Reference
Bo Tong official website
WICED SENSE Purchase Link
WICED platform introduction
Wiced SESNE development resource collection
Original declaration: This article is originally created by the panel network, declined!
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