The Arduino Cloud supports over-the-air (OTA) updates for ESP32 boards

dbeamonte_arduino · January 24, 2023, 12:24pm

We are really excited to announce that the Arduino Cloud now supports over-the-air (OTA) updates not only for Arduino boards but also for ESP32 boards.

OTA is one of the top rated features of the Arduino Cloud. It simplifies the programming experience as cables are not needed any more after the first programming. This is a big milestone for unifying the user experience of the Arduino Cloud for all the supported hardware.

There are plenty of ESP32 platforms available with different processors and memory sizes. This is an experimental feature that has been tested on the most popular ones, but there could be some limitations on some of the untested ones. We would be delighted to get your feedback.

Check out our blog post to learn more details.

If you want to get started with over-the-air updates, it is as simple as following the steps in the tutorial: Uploading sketches Over-The-Air (OTA).

noobmastha · January 24, 2023, 1:20pm

Great news, thanks, I`ll try this as soon as I can.

hammy · January 24, 2023, 2:55pm

I think you need a subscription to try it

whogarden1 · February 21, 2023, 5:12pm

Where can I find the sketch to flash an esp32 dev board to use OTA?
I found nothing here https://docs.arduino.cc/arduino-cloud/features/ota-getting-started
Thank you.

pennam · February 22, 2023, 7:47am

Hi @whogarden1,
you can use any ArduinoIoTCloud Sketch

whogarden1 · February 22, 2023, 8:58am

Hi pennam
Thank you.
I installed many libraries (ArduinoIoTCloud-master and many others)
I use 'ArduinoIoTCloud-Basic.ino'
I updated SECRET_SSID; SECRET_PASS; SECRET_DEVICE_KEY and BOARD_ID
And my device 'esp32 dev board' is now connected.
Thank you very much.

pennam · February 22, 2023, 9:12am

To trigger an OTA i suggest you to use the online editor, otherwise you need to manually create your OTA file and store it somewhere, see:

github.com

arduino-libraries/Arduino_ESP32_OTA/blob/main/examples/OTA/OTA.ino

/*
 * This example demonstrates how to use to update the firmware using Arduino_ESP_OTA library
 *
 * Steps:
 *   1) Create a sketch for your ESP board and verify
 *      that it both compiles and works.
 *   2) In the IDE select: Sketch -> Export compiled Binary.
 *   3) Create an OTA update file utilising the tools 'lzss.py' and 'bin2ota.py' stored in
 *      https://github.com/arduino-libraries/ArduinoIoTCloud/tree/master/extras/tools .
 *      A) ./lzss.py --encode SKETCH.bin SKETCH.lzss
 *      B) ./bin2ota.py ESP SKETCH.lzss SKETCH.ota
 *   4) Upload the OTA file to a network reachable location, e.g. LOLIN_32_Blink.ino.ota
 *      has been uploaded to: http://downloads.arduino.cc/ota/LOLIN_32_Blink.ino.ota
 *   5) Verify if a custom ca_cert is needed by default Amazon root CA are used
 *      https://www.amazontrust.com/repository/
 *   6) Perform an OTA update via steps outlined below.
 */

/******************************************************************************
 * INCLUDE

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system · August 21, 2023, 9:13am

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The Arduino Cloud supports over-the-air (OTA) updates for ESP32 boards

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