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Use attribute syntax for heading IDs
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seaxwi committed Oct 3, 2025
commit e977ff2bf5aa8c5ee446b93c4f6cb194400ade6e
Original file line number Diff line number Diff line change
Expand Up @@ -13,9 +13,7 @@ In this article:

---

<a id="r4"></a>

## UNO R4 boards
## UNO R4 boards {#r4}

The new **Arduino UNO R4 Boards** use a **Renesas RA4M1 32-bit Arm® Cortex®-M4 processor**.

Expand Down Expand Up @@ -50,9 +48,7 @@ Documentation: [UNO R4 Minima](https://docs.arduino.cc/hardware/uno-r4-minima)

---

<a id="uno"></a>

## UNO R3 (inc. older revisions, SMD)
## UNO R3 (inc. older revisions, SMD) {#uno}

While "Arduino UNO" was also the name of the [first Arduino UNO board model](#arduino-uno), it is now more often used to refer to any board with these characteristics:

Expand Down Expand Up @@ -140,11 +136,9 @@ Documentation: [ARDUINO UNO](https://docs.arduino.cc/retired/other/arduino-older

The original UNO board. It is sometimes referred to as the "R1" or "Rev1" version to distinguish it from later versions.

<a id="uno-wifi"></a>

---

## UNO WiFi, UNO WiFi Rev2
## UNO WiFi, UNO WiFi Rev2 {#uno-wifi}

See also: [Arduino UNO R4 WiFi](#r4-wifi).

Expand Down Expand Up @@ -177,11 +171,9 @@ A version of the UNO R3 with an ESP8266 Wi-Fi module.

Not to be confused with the **Arduino UNO WiFi Rev2**.

<a id="uno-mini"></a>

---

## UNO Mini Limited Edition
## UNO Mini Limited Edition {#uno-mini}

<!-- ### UNO Mini Limited Edition -->

Expand All @@ -195,11 +187,9 @@ Documentation: [UNO Mini Limited Edition](https://docs.arduino.cc/hardware/uno-m

This limited edition UNO board comes in a smaller form factor, and has a USB-C connector.

<a id="compatible"></a>

---

## Arduino-compatible "UNO" boards by other manufacturers
## Arduino-compatible "UNO" boards by other manufacturers {#compatible}

There exists a variety of clone and derivative boards, as well as other products marketed as "Arduino-compatible", with "UNO" in the name.

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