> 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/felyx/product.md).

# Product Information

## YuDash FELYX Low-Power IoT Data Logger <a href="#felyx-overview" id="felyx-overview"></a>

YuDash **FELYX** is our flagship Industrial IoT data logger, built for **weather, hydromet and environmental monitoring** applications. It brings together flexible field-instrument connectivity — RS485 Modbus, SDI-12, RS232, pulse and analog inputs — with a dual-core, low-power ESP32 edge platform, on-board SD card logging, and multi-protocol cloud telemetry.

FELYX is purpose-built for solar and battery-powered remote sites. A dedicated ULP co-processor and sub-1mA sleep current keep power budgets small, while 4G/LTE with GNSS, Ethernet LAN and Wi-Fi connectivity keep data flowing to the cloud. A battery-backed RTC, 8 GB industrial SD card and store-and-forward backfill ensure no readings are lost during network outages.

FELYX can be configured over Wi-Fi/LAN from a laptop or mobile browser, with JSON-based configuration backup and restore for deployment at scale. An on-device OLED display shows live status for field diagnostics.

<figure><img src="https://1858257737-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FToww5EM1cml3ouN6fvnJ%2Fuploads%2F3S6U3dl96hpHZ4RaYSJd%2F1.png?alt=media&amp;token=87d2abd0-8a42-4bd0-8e4f-7ce6afbc6d45" alt=""><figcaption></figcaption></figure>

### Core Processor

* Dual-core 32-bit Xtensa LX6 @ 240 MHz
* ULP co-processor for low-power operation
* Battery-backed RTC

### Storage

* 8 GB industrial SD card
* Flexible CSV logging (hourly/daily/monthly/yearly files)

### Network Connectivity (as per part number)

* 4G/LTE with GNSS/GPS (EU, ANZ and Global variants available on request)
* Ethernet LAN
* Wi-Fi (2.4 GHz)

### Field Instrument Interfaces (as per part number)

* RS485 Modbus RTU / Modbus TCP-IP (up to 2 ports)
* SDI-12 sensor bus
* 8-channel 16-bit ADC analog inputs (0-20mA / 0-5V / optional 0-90V)
* RS232 (ASCII / custom string parsing)
* Pulse inputs: tipping-bucket rain gauge, wind speed

### Cloud Protocols and Payloads

* MQTT, REST, HTTP, FTP with SSL/TLS
* Inbuilt JSON payload library, generic CSV/JSON payload generator
* Multi-server push with store-and-forward backfill

## FELYX Product Variants <a href="#felyxpartnumbers" id="felyxpartnumbers"></a>

### FELYX81

FELYX81 is our standard product, mostly available in stock. This is the most versatile product supporting all major protocols. This product variant is used in the documentation reference. It supports&#x20;

### FELYX Part Numbers

| Part No | Analog 0-20mA | Analog 0-5V | Analog 0-90V | RS485 Modbus #1 | Rain Gauge Pulse | SDI-12 | Wind Speed Pulse | RS232 | RS485 Modbus #2 |
| ------- | ------------- | ----------- | ------------ | --------------- | ---------------- | ------ | ---------------- | ----- | --------------- |
| FELYX80 | 4 Ch          | 4 Ch        | -            | Yes             | Yes              | Yes    | Yes              | -     | -               |
| FELYX81 | 4 Ch          | 3 Ch        | 1 Ch         | Yes             | Yes              | Yes    | Yes              | -     | -               |
| FELYX82 | -             | 8 Ch        | -            | Yes             | Yes              | Yes    | Yes              | -     | -               |
| FELYX83 | -             | 7 Ch        | 1 Ch         | Yes             | Yes              | Yes    | Yes              | -     | -               |
| FELYX84 | 8 Ch          | -           | -            | Yes             | Yes              | Yes    | Yes              | -     | -               |
| FELYX85 | 7 Ch          | -           | 1 Ch         | Yes             | Yes              | Yes    | Yes              | -     | -               |
| FELYX86 | 4 Ch          | 4 Ch        | -            | Yes             | Yes              | Yes    | Yes              | Yes   | -               |
| FELYX60 | 4 Ch          | 4 Ch        | -            | Yes             | Yes              | -      | -                | -     | Yes             |
| FELYX62 | -             | 8 Ch        | -            | Yes             | Yes              | -      | -                | -     | Yes             |
| FELYX64 | 8 Ch          | -           | -            | Yes             | Yes              | -      | -                | -     | Yes             |
| FELYX50 | -             | -           | 1 Ch         | -               | Yes              | -      | -                | -     | -               |

**Common features across all FELYX models:**&#x20;

4G/LTE connectivity, Ethernet LAN, 8 GB industrial SD card.

## User Manual Overview

The FELYX user manual covers the following sections:

* Terminals and Peripherals
* FELYX Configuration

{% hint style="info" %}
As the FELYX UI is continuously evolving, some interfaces in your product may be slightly different from the ones in this manual.
{% endhint %}