Create Upload-Arduino-sketches-to-boards-with-MicroPython-firmware.md

Author: gorillagripcore

content/Hardware Support/Generic/Upload-Arduino-sketches-to-boards-with-MicroPython-firmware.md

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+---
+title: Upload Arduino sketches to boards with MicroPython firmware
+---
+
+Uploading Arduino sketches to boards running MicroPython is simple, and in many cases, you can do it without removing the existing firmware manually.
+
+## Boards with MicroPython support
+
+- Arduino GIGA R1 WiFi
+- Arduino Nano 33 BLE
+- Arduino Nano 33 BLE Rev2
+- Arduino Nano 33 BLE Sense
+- Arduino Nano 33 BLE Sense Rev2
+- Arduino Nano ESP32
+- Arduino Nano RP2040 Connect
+- Arduino Nicla Vision
+- Arduino Opta Lite
+- Arduino Opta RS485
+- Arduino Opta WiFi
+- Arduino Portenta C33
+- Arduino Portenta H7
+- Arduino Portenta H7 Lite
+- Arduino Portenta H7 Lite Connected
+
+## Instructions for Nano ESP32
+
+1. Press the RST button two times, waiting 0.3 to 1 second between each press.
+
+   > [!IMPORTANT]
+   > The timing between presses is different compared to bootloader mode on most other Arduino boards. If bootloader mode won’t activate, try adjusting your timing.
+
+2. Check the on-board LED near the RST button:
+   - **If the LED pulses slowly in green[^colors]:** The board is in bootloader mode. Go to the next step.
+   - **If the LED is off:** Repeat step 1 or try [Option 2: Use the Esptool programmer option in Arduino IDE](#esp32-download-mode).
+
+3. Select Arduino Nano ESP32 in Arduino IDE or the Cloud Editor.
+
+4. Upload BareMinimum, or any other Arduino sketch to restore the standard Arduino bootloader.
+
+## Instructions for the remaining boards
+
+1. Open any Arduino development tool like Arduino IDE
+
+2. Select your board. If it does not appear, set your board to bootloader mode by double-pressing the reset button.
+
+3. Upload BareMinimum, or any other Arduino sketch.