LocalNetwork Concentrator-Sensor Connection issue

[JeffSm]

Hi, I tried the LocalNetwork demonstration in which one NUCLEO board acts as a concentrator and other NUCLEO boards act as sensor unit. Its available in STM32Cube_FW_WL_V1.0.0/Projects/NUCLEO-WL55JC/Demonstrations/LocalNetwork

I loaded and ran one NUCLEO board with LocalNetwork_Concentrator and one NUCLEO board with LocalNetwork_Sensor code. But my sensor NUCLEO board is not able to receive the beacon sent by the concentrator. I am not sure why this is happening. I have also attached the terminal image. Can you please guide why is the sensor not receiving the beacon?

[YBOUV.1]

Hello,

i tried the demo compiling LocalNetwork_Sensor and LocalNetwork_Concentrator with Keil 5.30.

I can not reproduce your issue.

Can you please detail the board version you are using? the IDE/compiler version? anything that could help us to reproduce.

On top of this, i'm wondering why you have the strange printing on the log, e.g. 0x0hx,hu,hu?

[JeffSm]

Hi, I compiled the concentrator and sensor code using STM32CubeIDE version = 1.5.1

The issue I am facing with the board is, after giving the concentrator board AT+Beacon_ON command, the concentrator starts sending beacon and green LED starts blinking. Similarly on sensor board, LED 3 blinks rapidly with red color. As soon as the sensor board receives the beacon, the concentrator LED stops (i.e. it stops sending beacon). I guess the issue is with the concentrator somehow, I am not sure why does it stops sending beacon after finding a sensor node. I have tried to upload the concentrator code on two different boards, the same issue exists with both.

I tried it using a new NUCLEO board without compiling it with STM32CubeIDE, it works well with in this case, I have attached the image below. I am able to establish a connection between concentrator and sensor node in this case. Not sure why the issue is occurring after compiling the NUCLEO board with STM32CubeIDE.

[YBOUV.1]

Can you please try compile the concentrator in release mode Cube IDE ?

thank you

[JeffSm]

CubeIDE version = 1.0.0 ?

[YBOUV.1]

in Cube IDE, there is 2 build configuration: the 'debug' and the 'release'

Could you please compile the concentrator project in release mode and try?

thank you

[JeffSm]

Thanks. I am able to connect the sensor now. But still one issue, in AT+RCV, the temperature data is correct, rest is not correct. Can you please tell why is this issue occurring?

[YBOUV.1 · Accepted solution]

Hi,

there seems to be an issue with the vsnprint and special formating with 'hh' or 'h' with gcc

They must be removed.

for example (in demo_report.c):

 APP_PPRINTF("AT+RCV=0x%08x,0x%02hhx,%hhu:%hhu,%hi,%hhi,",

      Header->eui, Header->packet_cnt, Header->version_major, Header->version_minor, Rssi, Snr);

should be replace by

 APP_PPRINTF("AT+RCV=0x%08x,0x%02x,%u:%u,%i,%i,",

      Header->eui, Header->packet_cnt, Header->version_major, Header->version_minor, Rssi, Snr);

sorry for the inconvenience

Let me know

[JeffSm]

Thanks for the help. It worked!

[JeffSm]

Hi,

In SubGHz_Phy_PingPong and LoRaWAN_AT_Slave applications, there is a way to change the preamble length by #define LORA_PREAMBLE_LENGTH. How can we change the preamble length in LoRaWAN_End_Node application?