LoRa-IoT Development Board
1 Introduction
"Things" from concept to widespread use today, the past twenty years, things developed rapidly and bloom in a variety of industries. In the process of development of things, the birth of a variety of wireless communication technologies: LoRa, GPRS, Bluetooth, Zig-Bee, WiFi and other wireless technologies based on these standards, and the birth of a range of products.
From the current perspective of Things industry, experts predict that by 2020, there will be about 12 billion things sensors and devices in use, and this trend continues to grow in number as well.
Low-power and long-range needs of more and more, regardless of application scenarios or design requirements, more users or developers want the product easy to use, lower power consumption, longer life, greater distances, LoRa communications technology advantages in this regard increasingly reflected.
2. LoRa communication
LoRa (Long Range) is a low-power, long-distance communication technology, the power consumption under the same conditions, over longer distances. In the anti-theft alarm, smart home, smart fire, remote meter reading, security monitoring and other fields of electricity, LoRa have been widely used.
LoRa using ISM (Industrial Scientific Medical) band without authorization can be used without charge related costs, enabling users to build the network; and NB-IoT using a carrier frequency band, which is provided by the network operator, the existing multiplexing the cellular base station. For some enterprises, they do not want the data acquisition device is the operator, hopes to build its own network, used to collect, control or data transmission equipment.
3. LoRa-IoT Development Board
In order to facilitate the relevant developers, academics and DIY enthusiasts, we LoRa based communications technology, developed an IoT development board KNT-DB8-LR (hereinafter referred to as LoRa-IoT), development board physical map as follows:
size is still small , LxW only 3.28cmx1.28cm.
Development board communications, programming interfaces, and an antenna have been set aside, the associated pin definitions have been given, the development board is designed to chose such a size and configuration, there are three main reasons:
First of all: the crowd, whether professionals or related learner, you can quickly get started;
Second: From a practical point of view, the use of personnel in learning or debugging is complete, you can directly into other products;
So LoRa-IoT development board looks currently on the market are not the same as other development boards, development boards are as many rich features, will lead out the use of all MCU pins, focused on helping users to understand and use the resources of the MCU; and LoRa- IoT development board focused on helping users to understand the LoRa communication process, as well as using the actual scene and products.
LoRa-IoT development board can be configured through programming interfaces Lora MCU also can be configured using the AT commands through the serial port assistant.
Stamp Interface boards employed, do not use metal vias, mainly from the viewpoint of size, availability and versatility and the like. If the metal vias required when connecting pin, to increase the height between the floor boards and, in order to avoid some of the devices due to limitations of the inner space, so the use of stamps hole.
When using the UART interface LoRa-IoT development board, the board can tunnel through the pin out of the external interfaces, particularly related operations can be viewed: LoRa-IoT welding video boards
Referring to FIG welding follows:
4. Applications
More and more electronic devices are battery-powered, these devices are very sensitive to power consumption, the device although usually dormant, but if the sleep current is too large, the battery life will be shortened. E.g. smoke alarms, such as remote meter reading, or handheld devices.
The following is LoRa-IoT development board application cases.
Examples of a product: the wisdom of smoke
The traditional smoke detectors are generally audible alarm if the user is out, even if there is an alarm message can not be learned immediately, it will cause serious accidents.
Wisdom scene smoke upon detection of smoke to reach a threshold concentration, in addition to audible alarm, the alarm will be sent to the internet through the gateway, the user can see the alarm information in the internet or a mobile terminal.
Wisdom Smoke Shape:
internal structure:
Product Example 2: Wisdom electrical safety monitoring device
Wisdom electrical safety monitoring device can acquire the measured line voltage, current, residual current, temperature and other parameters, the user can see these parameters in the internet. The device can be used in single-phase and three-phase power applications, reducing the safety line because the device or load reasons, triggered.
Equipment appearance:
internal structure:
From this point of view the development of the networking industry a few years, things have been involved in all aspects of our social life, which at the same time promote social change, but also to make our lives more convenient.
