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Living_SDK/framework/uOTA/README.md

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+## Contents
+
+```sh
+OTA
+├── hal
+├── ota_service.c
+├── src
+│   ├── 2nd_boot
+│   ├── device
+│   ├── download
+│   ├── transport
+│   └── verify
+└── aos.mk
+```
+
+## Introduction
+
+An over-the-air update is the wireless delivery of new software or data to smart devices, especially IoT devices. Wireless carriers and OEMs typically use over-the-air (OTA) updates to deploy the new operating systems and the software app to these devices.
+
+## Features
+
+1. Differential incremental upgrade;
+2. Dual banker:AB partition upgrade to support rollback to old version;
+3. Secure download channel;
+4. Firmware digital signature verification.
+5. footprint: ROM-->12K~18K RAM: 3K~8K
+
+## Dependencies
+
+Linkkit MQTT channel
+Linkkit CoAP channel
+
+## API
+
+User service APIs:
+
+```c
+/*OTA export service APIs*/
+int ota_service_init(ota_service_t* ctx);
+int ota_service_deinit(ota_service_t* ctx);
+```
+
+for sample code please check [otaapp](../../../app/example/otaapp/).
+## RTOS build
+```sh
+cd ROOT DIR;
+aos make otaapp@board;
+```
+
+## run CLI CMDs
+1. connect network
+```
+netmgr connect ssid passwd
+```
+2. run ota demo
+
+```
+OTA_APP pk dn ds ps
+```
+
+## Reference
+
+* [AliOS-Things OTA使用说明](https://github.com/alibaba/AliOS-Things/wiki/OTA-Tutorial)
+* [OTA flash分区说明文档](https://github.com/alibaba/AliOS-Things/wiki/OTA-Flash-Partitions-Overview)
+* [云端一体化差分+安全升级，AliOS Things物联网升级“利器”](https://mp.weixin.qq.com/s/Pb8Lleuww1r7qQJHu5ON8g)