This problem is about the Arduino-ESP32 Rainmaker demo

[fary_young]

I tried to use the Rainmaker example provided by Arduino-ESP32, but when I ran it, I printed out the result like this. How can I solve this problem?

QQ图片20210618095226.png (12.76 KiB) Viewed 25023 times

[ESP_Piyush]

Seems that your board already had the Wi-Fi credentials stored in the persistent memory (NVS) while your programmed it with the ESP RainMaker firmware. Please press and hold the BOOT button for more than 3 seconds and then release so that the credentials get erased . Thereafter, repeat the provisioning using the ESP RainMaker phone apps.

[fary_young]

Hello, thank you for your answer. After trying according to your method, the QR code can be successfully output, but the style interval of the QR code is too large to identify the information. How should I solve this problem?

QQ图片20210618183852.png (10.25 KiB) Viewed 24983 times

[John__]

Hi there, It looks like you are using windows. The serial monitor on windows cannot properly display the 2D barcode but there are 2 solutions:

1. Use a different serial monitor as I did here: https://youtu.be/g-Mw0-lzxdg

2. Enter the credentials manually as I mention in this video: https://youtu.be/g-Mw0-lzxdg

Hope this helps

[marcelstoer]

the QR code can be successfully output, but the style interval of the QR code is too large to identify the information

Right below the QR code you should also see a URL that you can paste into any browser. I will render the same QR code there.

[Baruna1221]

Why my serial monitor in arduino ide cannot display qrcode? I already install library esp32, etc