WRONG FW in the selected board : Getting ID/PAC/KEY information for custom board having S2-LP

[Nikhil D&K]

Hello,

I have a custom board based on STM32L073 MCU with S2LP radio device to provide SIGFOX functionality.

I am looking to provision my on chip S2LP device (i.e get ID/PAC/KEY) information from ST. I have referred "Getting started with the Sigfox S2-LP kit" and also this video https://www.youtube.com/watch?v=JD6UE7ekRxE but all the information is related to NUCLEO boards and not regarding any custom S2-LP board. 

Tested: When i flash SIGFOX_CLI_DEMO_NUCLEO_L0.bin to my custom board and try to open the COM Port (ST-DK) in SIGFOX GUI App i get the error of "Wrong FW in the selected board".

So can anyone please tell me how can i get ID/PAC/KEY for S2LP custom board based on STM32L073 MCU as i am unable to perform the same.

[BPRAS.1]

In case of FLASH, Sigfox Flasher need to be used for writing credentials. Please see section 6.6 of UM2169.

Please use command from any serial utility to send Message(Image attached).

Can you please also confirm, if EEPROM case is working using the SIGFOX GUI?

[Nikhil D&K]

Hello, we have a board (from our client) in hand that has STM32L073RZ MCU and S2LP transceiver on it for Sigfox communication but it's not a Nucleo board. So far that reason, its possible that i am getting that error of wrong firmware. I asked the question on Sigfox Slack community regarding whether the ID/PAC info will be provided by the ST or i have to get it from Sigfox build procedure and they told me to get ID/PAC info from Sigfox Build procedure as the hardware in question is a custom hardware using STM32L0 and S2LP chip.

Current update : I have received the set of 5 credentials from Sigfox Build procedure for testing phase.

I have followed the given link : https://build.sigfox.com/development#network-credentials

which in the end gives me id_key.bin file (contain decrypted binary data of 5 Keys) and ID/PAC text file.

Now i would like to know what are the information i have to write in flash ? ID/PAC ? In Sigfox documentation, it's written that i have to flash the board with id_key.bin file but how and at which particular address ?

Can you please tell the details steps of how i can flash/write the ID/PAC/KEY (received from Sigfox Build) and other info required for S2LP in flash.

Regards,

Nikhil Komalan

[BPRAS.1]

Hello,

The parameter details are there in Table 13 of UM2169.

Once output bin file is generated, the FLASH can be written manually using firmware(Memory Read/write).

The FLASH Address can be choosen as defined by user.

If you are using ,"STSW-S2LP-SFX-DK" v1.7.1 from st.com, FLASH Address are defined in "icf" file.

"SIGFOXUSER_FLASH_DATA".

Once credentials has been written , try to execute commend sent in snapshot.

get_id<CR><LF>

get_pac<CR><LF>

Try to verify, if this is same as the one that has been written.

[Nikhil D&K]

hello, the binary file is generated and i have currently used STCubeProgrammer for flashing at default location of 0x0800FF00.

"

Once credentials has been written , try to execute commend sent in snapshot.

get_id<CR><LF>

get_pac<CR><LF>

"

Which program have you flashed to perform this ?

[BPRAS.1]

Hello,

Ok, Good to know Initialization has been done without ERROR.

Try to execute "SIGFOX_API_send_frame" , by setting "but_pressed" variable either by Push Button or by Firmware.

If this function Get executed without any "error" (SFX_ERR_NONE) . This indicates, the message has been transmitted.

"use_public_key" can be set as per requirement.

[Nikhil D&K]

Getting error code 126 (0x7e) . Will my device send data ? its currently not registered at backend on Sigfox.

[BPRAS.1]

Hello,

For testing purpose , Please comment below lines to disable low Power Mode:

 // ST_MCU_API_GPIO_LowPower();

 // HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON,PWR_STOPENTRY_WFI);

//  ST_MCU_API_SetSysClock();

//  ST_MCU_API_GPIO_Restore();

After successful transmission , LED3 will blink 3 times.

But No Error should be returned by the function "SIGFOX_API_send_frame".

[Nikhil D&K]

Still getting same error while using SIGFOX_API_send_frame function. Shouldn't my device be registered at the Sigfox backend for testing ?

[BPRAS.1]

Hello,

Sorry, Can't confirm you the issue, As all nodes is already registered on my side.

I will suggest to Register the node and have some sigfox Emulator or network for receiving the Sigfox packet.

CLI examples can also be used for testing in interactive way using some serial utility.

Thanks

[Nikhil D&K]

Hello,

okay i will try it after registering.

Currently i have to develop firmware using Lower level drivers. I have successfully used read cut version of S2LP using LL driver of SPI. Aim is to send data packets once or twice a day at 12 hrs duration.

I would like to know whether the following step will work for initializing Sigfox communication and sending packet:

• Exit shutdown mode of S2LP (i.e S2868A1_RADIO_ExitShutdown())
• Initialize SPI bus for S2LP (i.e S2868A1_SPI_Init())
• Setting XTAL frequency and base (i.e S2LP_RADIO_SetXtalFrequency ,  S2LP_ManagementSetBand)
• Init the Sigfox Library (i.e ST_Sigfox_Init)
• Send the data packet (i.e SIGFOX_API_send_frame)

As there are many others functions called such as ST_MCU_API_TimerCalibration(), FEM_Operation etc , are they really needed. If i skip using this function will it effect my sigfox communication (i.e will my device connect to sigfox network).

Asking this because i have to develop the whole firmware using lower level drivers.