Neopixel Wiring to Xiao Super Mini

 

Note: All unused inputs (pins 4,10,13) are tied to ground

To wire the Seeed Studio  Xiao ESP32-C3 (or the popular "Super Mini" variant layout) to your SN74AHCT125N level shifter for addressable NeoPixels, use the mapping below.

By default, WLED and many standard ESP32-C3 LED projects utilize GPIO 2 (marked as D2 / A2 on the Xiao board pinout) as the primary data output pin.

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Guide to interface to cloud:

Controlling programmable LED lights connected to a Seeed Studio XIAO ESP32-C3 via the internet using Arduino Cloud (Arduino IoT Cloud) involves setting up an online "Thing," linking your board, writing the control sketch, and building a remote dashboard. [1, 2, 3]

1. Hardware Connections

Connect the data/signal pin of your LED lights (such as a digital pin or NeoPixel/WS2812 data line) to a usable GPIO pin on the XIAO ESP32-C3 (for example, GPIO 2 or D0/D10). [1, 2, 3]

Connect the VCC (power) and GND (ground) pins of your LED strip or lights to an appropriate external power supply or the 3.3V/5V pins (ensure your power supply can handle the current draw of the LEDs, as the XIAO board's internal regulator cannot power long or bright LED strips). [1]

Test with Adafruit Neopixel "Strandtest" example code.

2. Arduino Cloud Setup

1. Log in to the Arduino Cloud platform. [1]

2. Create a "Thing":

• Navigate to Things and create a new Thing.
•  Add a Variable (e.g., name it led, type CloudLight or Boolean / CloudSwitch, and set it to Read/Write with permission for dashboard updates). [1, 2]

3. Link a Device:

• Add your device and select ESP32-based or custom board, specifically registering your Seeed XIAO ESP32-C3.
• Download or save the auto-generated Device ID and Secret Key. [1]

    Configure Network:

• Enter your local Wi-Fi SSID and Password inside the network credentials section of the Thing. [1]

3. Write and Upload the Sketch

1. Go to the online IDE or use your local Arduino IDE (with the ESP32 board package installed for the XIAO ESP32-C3).

2. The Arduino Cloud will auto-generate a skeleton sketch containing your configuration files (arduino_secrets.h) and an event-handling function like onLedChange().

3. Fill in the logic inside onLedChange() to update your LED state or strip data using functions like digitalWrite() or a library like FastLED/Adafruit NeoPixel:

4. Connect the XIAO ESP32-C3 to your computer via USB, select the correct COM port and board target, and upload the sketch. [1, 2, 3, 4, 5]

4. Build the Dashboard & Control

1. In Arduino Cloud, go to Dashboards and create a new dashboard.

2. Add a Switch widget (or a Color Picker / Slider if you are using addressable RGB LEDs) and link it directly to your led variable.

3. Open the Arduino IoT Cloud Remote mobile app or use the web browser dashboard to toggle or adjust your lights from anywhere over the internet. [1, 2, 3, 4]