FREERTOS LORAWAN on ST B-L072Z-LRWAN1 in saclay

[andreavitaletti]

Hi all

GOAL: run lorawan on ST B-L072Z-LRWAN1 with freertos

I can compile the code available on https://github.com/Lora-net/LoRaMac-node on a saclay lorawan node specifying as platform the B-L072Z-LRWAN1

The only adjustment to the cmake command is -DTOOLCHAIN_PREFIX="/opt/gcc-arm-none-eabi-4_9-2015q1/" and clearly -DBOARD="B-L072Z-LRWAN1" -DSECURE_ELEMENT="SOFT_SE" -DSECURE_ELEMENT_PRE_PROVISIONED="OFF"

The build produces and ELF ... at least judging from the HEX content of the LoRaMac-periodic-uplink-lpp

I then follow the instructions available at https://www.iot-lab.info/legacy/tutorials/riot-ttn/index.html to upload the firmware

iotlab-node --flash LoRaMac-periodic-uplink-lpp -l saclay,st-lrwan1,10

However, when I connect by nc st-lrwan1-10 20000 I get binary characters. So something is going wrong.

I also tried to compile the serial_echo available on https://github.com/iot-lab/openlab, the freertos specifically for M3, but again the serial is not working as expected and I get binary characters

Any idea on the possible problem?

Thanks, Andrea

[aabadie]

Hello,

Not sure but it seems the baudrate configured by LoRaMac-Node [1], 921600, is not compatible with the serial client used by IoT-LAB, 115200. The openlab code base is built for iotlab-m3, which is ARM Cortex-M3 (STM32 F1), and thus is not compatible with ST B-L072Z-LRWAN1 since this boards embeds an ARM Cortex-M0+ (STM32 L0).

Regards,

Alex

[1] https://github.com/Lora-net/LoRaMac-node/blob/dcbcfb329b4a343ab007bc19ac43a8dc952b3354/src/boards/B-L072Z-LRWAN1/board.c#L128

----- Le 27 Mar 24, à 11:43, Andrea Vitaletti @.***> a écrit :

Hi all

GOAL: run lorawan on ST B-L072Z-LRWAN1 with freertos

I can compile the code available on [ https://github.com/Lora-net/LoRaMac-node | https://github.com/Lora-net/LoRaMac-node ] on a saclay lorawan node specifying as platform the B-L072Z-LRWAN1

The only adjustment to the cmake command is -DTOOLCHAIN_PREFIX="/opt/gcc-arm-none-eabi-4_9-2015q1/" and clearly -DBOARD="B-L072Z-LRWAN1" -DSECURE_ELEMENT="SOFT_SE" -DSECURE_ELEMENT_PRE_PROVISIONED="OFF"

The build produces and ELF ... at least judging from the HEX content of the LoRaMac-periodic-uplink-lpp

I then follow the instructions available at [ https://www.iot-lab.info/legacy/tutorials/riot-ttn/index.html | https://www.iot-lab.info/legacy/tutorials/riot-ttn/index.html ] to upload the firmware

iotlab-node --flash LoRaMac-periodic-uplink-lpp -l saclay,st-lrwan1,10

However, when I connect by nc st-lrwan1-10 20000 I get binary characters. So something is going wrong.

I also tried to compile the serial_echo available on [ https://github.com/iot-lab/openlab | https://github.com/iot-lab/openlab ] , the freertos specifically for M3, but again the serial is not working as expected and I get binary characters

Any idea on the possible problem?

Thanks, Andrea

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[andreavitaletti]

Hi Alex

thanks a lot ... I should have thought about it :-)

Anyway I changed the baudrate to 115200 as you suggested in src/boards/B-L072Z-LRWAN1/board.c the line with UartConfig( &Uart2, RX_TX, 115200, UART_8_BIT, UART_1_STOP_BIT, NO_PARITY, NO_FLOW_CTRL );

An now I can properly see the output on the serial

So I can now move to properly configure the LORA connection!

Regards, Andrea