> For the complete documentation index, see [llms.txt](https://docs.yudash.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.yudash.com/device-to-cloud-api/yudash-iiot-stack.md).

# YuDash IIoT Stack

**IoT** involves flow of information from ***things*** (field instruments, PLC, sensor etc) to the **internet** (Cloud, local server, Edge device) . 

IoT Gateways/Data Loggers play a critical role in the flow of information across layers. **YuDash IIoT stack** in the figure below, explains various components of IIoT, which our products support.

Different components of the stack will be explained in subsequent sections and Integration Guides.

<figure><img src="/files/LjdYrN6XFW2nrGILTQe3" alt=""><figcaption></figcaption></figure>

YuDash IoT gateways (LYNX and ZENYX) can be easily integrated with any IoT platform on cloud. It can be integrated with on-premise server. This is enabled by flexible, no-code features. The IIoT stack is explained through the diagram below:

### [Multiple Cloud Protocols Support ](/device-to-cloud-api/cloud-protocols.md)

* Support of MQTT and HTTP/S protocol (REST APIs) for connection to IoT platform.
* YuDash IoT devices support FTP protocol for enterprise customers with legacy servers. Please contact us if you wish to add FTP support for your server.

### [Flexible Payload Formats](/device-to-cloud-api/payload-formats.md)

* Flexible payload formats in JSON and TXT formats for smooth plug and play with servers.
* Support of Time Stamp in payload with RTC enabled versions.
* Support of backfill in server through flexible time formats to suit all platforms.
* Besides process information, support of device status to monitor health of device.

### [Choice of Network Connectivity](/device-to-cloud-api/network-connectivity.md)

* Choice of connectivity through 4G/LTE, Wi-Fi and Ethernet.

Following are the main steps to connect to external IoT platform:

1. Selection of Cloud Protocol
2. IoT platform server details and credentials under Custom Cloud Server Settings in LYNX
3. Payload Format Selection