Also found this : https://www.motius.com/post/how-to-build-a-secure-iot-prototype-with-arduino-and-esp32

It seems esp-idf is only needed for the encryption part, the code can be written with arduino framework

@lukasmaximus Same question here, but which module use to add an external wifi antenna. I need a longer range.

Hi,

What is for you the best way to distribute an app I developped to my customers ?

• customers are not technicians or makers, it must be simple to burn it (no IDE usage)
• the app must be closed source and protected from copy and reverse eng (encrypted bin)
• users must be able to update the application, by downloading a new version and burning it onto the card

@ajb2k3 Thank you, I found the schematics (https://github.com/m5stack/M5-Schematic), but do you know where I can find Gerber files ?

@teastain I am adding DS18B20 sensor

Hi,

I have a project based on M5 Tough : https://docs.m5stack.com/en/core/tough

I need to modify the extension board (TOUGH.EXT).

In the documentation there is the schematics, but where can I find building files (dimensions, Gerber, BOM) ?

Thank you !

Now the next challenge, use esptool-js to upgrade core2 ota.

Do someone know if esptool-js support transfert for encrypted files?

Also found this : https://www.motius.com/post/how-to-build-a-secure-iot-prototype-with-arduino-and-esp32

It seems esp-idf is only needed for the encryption part, the code can be written with arduino framework

I just found that M5unified support ESP-IDF : https://github.com/m5stack/M5Unified

@m5stack or @felmue can confirm we can use boot and flash encryption with M5unified ?

Did you found a solution? I am looking for the same feature.

As I understand we need to use ESP-IDF

I found this but not tested it for now : https://github.com/ropg/m5core2_esp-idf_demo

Hi,

What is the method to prevent code from being copied ?

I read that it is easy to reverse to code from the memory, so using esp32 flash encryption should prevent that. Right?

But then is it possible to upgrade the code ?

If I use a webpage with esptool-js and .bin files, then the users can upgrade, but can I provide encrypted only files, and not the originals .bin ?

Thanks

I've never had any problems with the DS18B20 sensor powered at 5V, with an external 4.7k resistor. Never any esp32 or even Raspberry Pi burnt out.

I did a few tests:

• 24 m cable with 8 sensors of 1m at the end
• sensors powered by 3.3V

Works well with 4.7k external resistor
Also works well with internal resistor using pinMode(33, INPUT_PULLUP)
No errors (-127 or not detected) at all in all cases

I'll test soon with longer cables.

But, most important I use certified DS18B20, not bad quality copies that are good only for short distance.