Best microcontroller for WPA2 Enterprise connection?

[Lukisek]

Hello

I have to do a project which using WPA2 Enterprise connection to sending some data to the server application. I tried this on NodeMCU ESP8266 but this device has too small RAM memory because I have to use certificates to get access to the AP. So when I use nodemcu it works properly but sometime it crash... I need more stable device without any crashes. Can you recommend me some nice devices which I could program in Arduino IDE?

Thank you.

 

[KlausST]

Hi,

You already know that memory is low... but the same time miss to tell how much memory you need.

Klaus

 

[Lukisek]

Just a little more than ESP8266 but also it can has definitly more. ESP8266 is almost the best solution because it has deep sleep mode so power consumption is small.

 

[betwixt]

Without knowing how much memory you actually need it's difficult to advise but you could consider ESP32 as an alternative to ESP8266. From the outside they are similar but ESP32 has more memory/speed/IO pins and also has a Bluetooth interface. It can be programmed with Arduino IDE.

Brian.

 

[KlausST]

Hi,

Just a little more than ESP8266

Then 2 additional bytes sufficient!?

Klaus

 

[Lukisek]

I thought about ESP32 and now I consider to use it instead of ESP8266. Thank you Brian.
Sorry Klaus I have expressed myself in bad way and of course 2 bytes more would be still little. ESP8266 has 160 kBytes RAM and I think that doubling this value would be perfect. Sorry for understatement.

Lukas.

 

[betwixt]

I use WROOM32 modules with much larger memory in them than the basic processor. A WROOM32 with a spring socketed development board is a powerful tool to have. Do all the programming and debugging on the development board then pop the WROOM module out and solder it to the final PCB.
Example development board:
https://uk.banggood.com/ESP32-Test-...VCh0wQwGgEAQYBCABEgLEU_D_BwE&cur_warehouse=CN

Brian.

 

[Lukisek]

Ok then thank you for advice but I think that I will buy NodeMCU module with WROOM32 because I have to load certificate and this certificate expires after a year. So after this time I can plug usb to the nodemcu and reprogram controller with the new one certificate. I don't have any idea about how to update certificate in device without connecting to the usb. Is there possibility that certificate will be read from a sdcard? Then it's easy just replace the sdcard. Hmm I have to read about some solutions but it's not easy to find some useful informations. I figured out that most of projects on ESP are realized on simple wpa2 AP connection with login and password not with certificate.

 

[betwixt]

I've never tried it but I can't see any reason why the certificate can't be saved to an SD card. It is only a text file.
This might give you some ideas:


Brian.

 

[Lukisek]

Thank you so much Brian for tips. Yeah, certificate is only text file but when I use it to authentication on radius then it has to be in RAM after all... Ok I have to try some ways to get the required result. Anyway I will try.

Lukas.