We have a IoT project using AZure. The product is working no problem in EU and US/Canada. But when we test it in China, we got 0x2700 error from mbedtls_ssl_handshake. What do we need to do to be able to use SSL connection in China. Do we need new CA certificate from Chinese government or they need ...

Just curious what does this mean?
My projects compile OK, but always wanted to know why the compiler is looking for Perl.
Thanks.

Hello. I am developing a product use ESP32 module. The firmware image will be released / sold with a license key based on MAC address on each module. My question is: - Is it a good idea to use nvs_storage.c lib to save the key? - Is it internal flash or SPI to the external. If it is external, it doe...

Thanks Angus. Now I understand!
A couple more questions:
1) After I set the module to release mode can I change it back to development mode or plain text mode?
2) I am trying to avoid OTA in production. Is it possible? Thanks again

After reading more about the encryption. Development Mode should work for me. (Forgot to mention that I am using ESP32-WROVER module) This is why I think it works for me: AES key is stored in the CPU, it is different on every ESP32-WROVER. My application is stored in the external SPI flash, encrypte...

Thank you for the deep explanation. The software development is finished, We are about into production now. Just want a way to protect the product from copied. I thought it is just like "turn on the read back protect" as I have done on other MPU's. Understand this is the Flash outside of the CPU. Se...

In that article.
What does this mean?
"Enabling flash encryption limits the options for further updates of the ESP32".
So I cannot update firmware anymore after the encryption??

Thanks. I was reading that article, but it seems like I have to use OTA to download the firmware. So far my product isn't using WiFi or BLE. In production they only plan to use UART0 to download the software. I will read the article again. Another question, how to verify that my firmware is protecte...

Does that mean the read back protection is enable automatically?
I am using the ESP_PROG to program and test my software using UART0.

What is the should I put after "idf.py"?
And is it possible to "brick" the ESP32?

All I want is simply stop people from copying my software.

Thanks

Sometimes it will flash the module automatically without me pressing the boot button, which is what I expected.
So is there some minor timing off in idf.py program?

Is there anyone using ESP-PROG board to program their ESP32 module?

Thanks

Paul