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Help Center/ IoT/ User Guide/ Developer Center/ Product/ Product Development/ Device Development

Device Development

Updated on 2022-02-24 GMT+08:00

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Based on the protocol used by the device to connect to the IoT platform, there are two access scenarios:

Access using CoAP or LWM2M. In this scenario, devices can connect to the IoT platform by integrating NB-IoT modules or LiteOS SDK.

Integrating NB-IoT Modules

Devices integrated with NB-IoT modules can connect to the IoT platform through NB-IoT networks.

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Features	Wide coverage: The gain is 20 dB higher than that of LTE. Low power consumption: The solution focuses on applications with small data volume at a low rate. Massive amounts of connections: A single sector supports a maximum of 50,000 connections. Low cost: NB-IoT chipsets or modules are cost-effective for its low rate, low power consumption, and low bandwidth.
Scenarios	Low requirements on data timeliness, small data packets, fixed locations, and power supply from batteries. For example, smart metering and smart street lamp.
Applicable Networks	NB-IoT network: constructed by carriers NB-IoT SIM card: purchased from NB-IoT network carriers NB-IoT module: purchased from the module manufacturers.
Communication Protocols	CoAP/LWM2M

Integrating LiteOS SDK

The LiteOS SDK is a lightweight SDK integrated on the device. Its features are as follows:

Features	Protocols and security details are shielded. Users can focus on their applications without paying attention to the implementation of protocols and security policies. An adaptation layer is provided. Users can migrate LiteOS SDK by adapting only a few interfaces. Data reported by devices can be cached and retransmission and acknowledgment mechanisms are provided to ensure data reporting reliability. Firmware upgrade, resumable download, and integrity protection for firmware packages are supported. Security and non-security connection modes are supported.
Running Environment Requirements	RAM > 32 KB FLASH > 128 KB
Applicable Networks	NB-IoT, 2G/3G/4G, and wired networks
Communication Protocols	CoAP and LWM2M

Access using MQTT/MQTTS. In this scenario, devices can connect to the IoT platform by integrating AgentLite SDK.

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AgentLite SDK is a lightweight SDK integrated on the device. Its features are as follows:

Features	Multiple network access modes are supported, such as Wi-Fi, 2G/3G/4G, and wired network. After devices are integrated with the lightweight SDKs, they can be connected to the IoT platform by calling APIs. Data in JSON format is used for frequent communication and communication involving huge amount of data.
Running Environment Requirements	RAM > 4 MB FLASH > 600 KB Currently, the following platforms are supported: ARM Linux (Embedded Linux) MIPS Linux (Embedded Linux) x86 Linux x86_64 Linux x86 Windows x86_64 Windows Android (Java)
Applicable Networks	2G/3G/4G and wired network
Communication Protocols	HTTPS, MQTT, and MQTTS