High-Flying HF-LPT270

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Summary

PRODUCT OVERVIEW

General Description

Provides a general overview of the module's purpose and features.

Device Parameters

Details technical specifications and parameters of the device.

Hardware Introduction

Introduces the hardware aspects of the module.

HF-LPT270 Pins Definition

Explains the pinout and function of the HF-LPT270 module.

Electrical Characteristics

Outlines the electrical specifications, including voltage and temperature ratings.

HF-LPT270 Mechanical Size

Provides the physical dimensions and package details of the HF-LPT270 module.

On-board Chip Antenna

Details guidelines for using the internal on-board chip antenna.

External Antenna

Explains the option for connecting an external antenna via IPEX connector.

Evaluation Kit

Describes the evaluation kit provided for product familiarization and development.

Order Information

Details how to order different variants and physical types of the module.

Hardware Typical Application

Illustrates a typical hardware connection diagram for the module.

APPENDIX D: CONTACT INFORMATION

OEM;Integrators Installation Manual

List of applicable FCC rules

Lists FCC rules applicable to the module.

Specific operational use conditions

Specifies the conditions for operating the module in IoT devices.

Limited module procedures

Outlines any limited module procedures or requirements.

Trace antenna designs

Discusses antenna design considerations.

RF exposure considerations

Addresses FCC radiation exposure limits and installation guidelines.

Antennas

Provides details about the antenna type and gain.

Label and compliance information

Explains FCC ID labeling requirements for host devices.

Test modes and additional testing requirements

Covers testing requirements for host product manufacturers.

Additional testing, Part 15 Subpart B disclaimer

Provides a disclaimer regarding additional testing for Part 15B.

The HF-LPT270 is a versatile Wi-Fi and BLE module designed for integration into various IoT devices, offering a comprehensive set of features for wireless communication and control. This module is built upon a RISC SOC, providing a robust foundation for its operations.

Function Description

The primary function of the HF-LPT270 is to enable seamless wireless connectivity for IoT applications, supporting both Wi-Fi (IEEE 802.11b/g/n) and BLE 5.0 standards. This dual-mode capability allows for flexible communication options, catering to different application requirements. For Wi-Fi, it operates in the 2.412GHz-2.472GHz frequency range, while BLE communication utilizes the 2.402GHz-2.480GHz band. The module can function in both Wi-Fi STA (Station) and AP (Access Point) modes, providing adaptability for connecting to existing networks or creating its own.

A key aspect of its functionality is data communication, which can be established via UART for both Wi-Fi and BLE. This simplifies integration with host microcontrollers, allowing for straightforward data exchange. The module also supports various configuration methods, including SmartBLELink for BLE configuration and SmartAPLink/Sniffer SmartLinkV8 for Wi-Fi AP configuration. These features streamline the setup process, making it easier to deploy the module in different network environments.

The HF-LPT270 is designed to be a core component for a wide range of applications, including remote equipment monitoring, asset tracking and telemetry, security systems, industrial sensors and controls, home automation, and medical devices. Its compact size and SMT18 package make it suitable for space-constrained designs.

Usage Features

The HF-LPT270 offers several user-friendly features that enhance its usability and integration into end products. It operates on a single +3.3V power supply, simplifying power management for developers. The module provides multiple antenna options, including an internal PCB antenna for the HF-LPT270, HF-LPT170, HF-LPT271, and HF-LPB170 variants, as well as an external 1st IPEX antenna option for the HF-LPB170 and HF-LPB175, offering flexibility in antenna placement and performance optimization.

For debugging and configuration, the module includes a UART1 debug interface, which operates at a baud rate of 921600. This allows developers to monitor logs and program firmware efficiently. The module also features several indicator pins:

nReady Pin (LED): This pin indicates the completion of the OS initialisation. The UART function becomes available only after this pin outputs a low signal. High-Flying strongly recommends connecting this pin to an LED for visual feedback.
nLink Pin (LED): This pin serves multiple purposes. In wireless firmware and config upgrade mode, it indicates the configuration and upgrade status. In "SmartLink" config mode, it signals when the application has finished setting up. In normal mode, it acts as a Wi-Fi link status indicator, outputting low when in STA mode connected to an AP, or when another STA connects to it in AP mode. This pin is also recommended to be fanned out to an LED.
nReload Pin (Button): This pin is crucial for module configuration and maintenance. A short press (0.2s to 1.5s low) after power-up puts the module into SmartBLELink config mode, allowing an APP to set router SSID and password. A long press (greater than 4s low) after power-up restores the module to its factory default settings. High-Flying advises connecting this pin to a connector or button for "Manufacture" upgrade or "SmartLink" applications.

The module supports various data interfaces, including UART, GPIO, SPI, PWM, and ADC, providing extensive connectivity options for different peripherals and sensors. The operating voltage range is 2.7V to 3.6V, with varying current consumptions depending on the operational mode (e.g., peak, average STA, average AP, standby).

Maintenance Features

The HF-LPT270 incorporates features that facilitate maintenance and firmware management, ensuring long-term usability and adaptability.

Wireless and Remote Firmware Upgrade: The module supports both local wireless and remote OTA (Over-The-Air) firmware upgrades. This capability is vital for deploying bug fixes, security patches, and new features without physical access to the device, significantly reducing maintenance costs and effort.
Software SDK for Development: High-Flying provides a Software Development Kit (SDK), enabling developers to create custom applications and tailor the module's functionality to specific needs. This SDK supports IPv4, TCP/UDP/HTTP/TLS protocols, and an AT+instruction set, offering a powerful toolset for customization.
Factory Default Configuration Restoration: The nReload pin allows users to easily restore the module to its factory default configuration. This is particularly useful for troubleshooting or re-purposing the module in different environments. By de-asserting the nReload signal "0" for more than 4 seconds, the module will revert to its original settings and restart.
Module Reset: The nReset pin provides a hardware reset function. An internal pull-up resistor is present, eliminating the need for an external one. For a proper reset, the MCU should assert a "0" signal for at least 10ms, then set it to "1" to ensure the module is fully reset.
Evaluation Kit (EVK): High-Flying offers an EVK to help users familiarize themselves with the product and develop detailed applications. The EVK allows connection to the module via RS-232 UART, USB (internal USB to UART converter), or wireless interface for parameter configuration, module management, and functional testing. This kit simplifies the initial development and testing phases, aiding in quicker product integration.

The comprehensive set of functions, user-centric features, and robust maintenance capabilities make the HF-LPT270 a reliable and adaptable module for a wide array of IoT applications.