[STM32WLE5JC][LoRaWan - End_Node] How to change device_eui, epp_eui, app_key from program ?

[SC26]

Hi,

I have build a custom application from end_node project example on LoRa-E5 board.

All works fine with comissioning from CubeMX.

But now I want to use values loaded from flash.

So I added 3 variables :

uint8_t device_eui[8];

uint8_t app_eui[8];

uint8_t app_key[16];

I can read/write values from flash.

But now : how to use this values for LoRa-Wan OTAA joining ???!!!!

How could this be sooooo hard to do ???!!!!!

Thanks for help.

[Andrew Neil]

The software does OTAA as-is - no changes needed. 😁

See this series of videos:

https://www.youtube.com/watch?v=vuc6914B0KM - Part 1; parts 2 & 3 follow

[SC26]

Hi,

I know OTAA is well done ... that's not my answer.

The question was : how to change End device commissioning parameters without rebuibind firmware for each device ?

( I already have read this parameters in variables from flash )

thanks.

[SC26]

I have look the 4 video ... not what I'm lokoing for ... he just edit identity.h to change commissioning parameters ...

[Andrew Neil]

As it tells you in those videos, the Device EUI is taken from the STM32's unique ID.

To change the other parameters, just look at where those values get used - use your IDE's browsing facilities - and supply your own instead.

[SC26]

I have try that ... And don't find.
So i ask here ...

[Andrew Neil]

So how far did you get with that? Where are you stuck?

[SC26]

The problem is to find where set parameters in the end_node example project.

Of course this must be in USER CODE BEGIN / USER CODE END section for not beiing overwrite by CubeMX on next code generation ...

[SC26]

In anycase : thanks for your answers 😉

[SC26]

Where am I ?

I have found in "se-identity.h" all the MX's #define :

#define LORAWAN_DEVICE_EUI                 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }

#define LORAWAN_JOIN_EUI                  { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }

#define LORAWAN_APP_KEY                  00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00

And also found where they are used :

[ soft-sec.c :: 527 ]

SecureElementStatus_t SecureElementInit( SecureElementNvmData_t *nvm, SecureElementGetUniqueId seGetUniqueId )

But this section is not user-allowed.

I also see some tools functions :

SecureElementStatus_t SecureElementSetKey( KeyIdentifier_t keyID, uint8_t* key )

SecureElementStatus_t SecureElementSetDevEui( uint8_t* devEui )

SecureElementStatus_t SecureElementSetJoinEui( uint8_t* joinEui )

But I don't found how (from where) I can use this ...