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README.md

1# IoT Hardware<a name="EN-US_TOPIC_0000001117425053"></a>
2
3-   [Introduction](#section11660541593)
4-   [Directory Structure](#section1464106163817)
5-   [Constraints](#section1718733212019)
6
7## Introduction<a name="section11660541593"></a>
8
9The Internet of Things \(IoT\) hardware subsystem provides APIs for operating IoT devices, including flash, general-purpose input/output \(GPIO\), Inter-Integrated Circuit \(I2C\), pulse width modulation \(PWM\), universal asynchronous receiver-transmitter \(UART\), and watchdog APIs.
10
11## Directory Structure<a name="section1464106163817"></a>
12
13```
14/base/iothardware/peripheral
15├── interfaces
16    └── inner_api                      # APIs for operating IoT devices
17```
18
19## Constraints<a name="section1718733212019"></a>
20
21The IoT hardware subsystem is compiled using the C language. Currently, only the Hi3861 development board is supported. If you want to use other chips, you need to implement OpenHarmony APIs.
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23