Arduino IoT ESP32 MQTT: ZenAir

ZenAir is a professional JavaScript-driven tool for communication with microcontrollers (Arduino, ESP8266, ESP32) and IoT devices via USB Serial, Wi-Fi, MQTT, or Bluetooth.

Connect your serial device, ESP32 or Raspberry Pi, send and receive data, build interactive control panels, and automate logic — all from your Android device.

━━━ WHY ZENAIR ━━━

— No Ads. No paid features. No telemetry

— Works completely offline and locally

— JavaScript runtime engine: transform, filter, and react to incoming data in real time

— Placeholder Resolver: embed dynamic commands into messages ($js, $send, $file, $itemField and more)

— User File: write and read any data to application storage by one $file command

— SSDP Locator: auto-discover IoT devices on your local Wi-Fi and load terminals embedded in your microcontroller

— Grid Terminal: freely place UI elements on screen, configure layout with an editor — adapts to any screen size

— Import/Export terminals between devices via file, text, or Data Matrix (QR-like) image

— Encryption export: AES-256-GCM with PBKDF2 key derivation

— Fullscreen Terminal view mode

— Ability to choose background image for Terminal

— 5 color themes with auto theme switching system based on a configured time schedule

— Unique timestamps: Delta from last message, Relative, Human-style and etc

— Auto Connect, Auto Reconnect, Background operation

— Autosave with adjustable rate

— Keep-screen-on mode

— Line-keeping: in moving console keeps the line which you stay on

━━━ CONTROL ELEMENTS ━━━

8 interactive items available in Grid Terminal:

Button, Switch, Slider, Joystick, State,

Text Log, Text Field, Linear Chart

━━━ TERMINALS ━━━

All connected devices are represented as Terminals.

Two terminal types are available:

CLASSIC — streamlined intface with console, history,

sliders (up to 16), and butertons (up to 60).

GRID — drag-and-drop canvas where you place and configure

items freely. Supports editor mode,

per-element MQTT topics, and remote configuration

from your microcontroller via commands.

━━━ LINEAR CHART ━━━

High-performance chart item engineered for real-time IoT data:

— Up to 8000 data points

— Multiple view modes: Line, Point, Column, Area, Delta

— JavaScript-powered data and label transformation

— Day/Night indicator line

— Pinch-to-zoom with edge snapping

— Up to 56x faster than previous generation

━━━ OPEN & FREE ━━━

ZenAir is distributed completely free with no hidden purchases.

Change logs and privacy policy available on GitHub.