I-CUBE_LRWAN End Node does not work stably

Forum|Forum|9 years ago
May 5, 2017
5 replies
2186 views

Posted on May 05, 2017 at 09:34

Hello.

I try to use I-CUBE-LRWAN example End Node for stm32L152. Base station is iC880A with raspberry pi 3. Also i use

https://community.st.com/discussion/thethingsnetwork.org

. I ported this example to iM880B (stm32L151CB-A + sx1272). And my end node device easy joined to base station and to cloud. But after first sending frame with data, LoRaMacState == LORAMAC_TX_RUNNING. And when time is gone for next send frame,

LoRaMacState not cleared. So next frame is not sending while not reboot device. I found that after first send frame, in function OnRxWindow2TimerEvent():

if( RegionRxConfig( LoRaMacRegion, &rxConfig, ( int8_t* )&McpsIndication.RxDatarate ) == true )

{

RxWindowSetup( rxConfig.RxContinuous, LoRaMacParams.MaxRxWindow );

RxSlot = rxConfig.Window;

}

Condition not met, because

SX1272.Settings.State == RF_RX_RUNNING, but must be

SX1272.Settings.State == RF_IDLE.

All parameters in example is default. What is wrong? How can I fix that problem? Thanks.

#stm32l151 #i-cube-lrwan

STM32L1 Series

This topic has been closed for replies.

Best answer by Mikk Leini

Posted on July 05, 2017 at 15:04

I managed to find the reason for my problem.

The root cause was that the DIO1 signal from SX1276 was not connected to the SMT32 MCU.

I asked same question here also (with more details):

https://github.com/Lora-net/LoRaMac-node/issues/217

Rafael Costa

Visitor II

Posted on June 16, 2017 at 10:53

Same problem here.

Does someone knows how to fix it?

Mikk Leini

Senior

Posted on June 24, 2017 at 21:37

Me too - same problem and similar setup (RPi GW + TTN back end). Except that I am building device on SX1276 and STM32F401 with FreeRTOS. First i thought my own implementation of timerServer based on CMSIS OS timers is buggy but now it seems something else. I also tried to remove frame counters and look for other settings from TTN console which might cause the device to stay in some intermittent state but nothing helped.

Have you guys found any solution meanwhile?

Edit:

I was using

I-CUBE-LRWAN version 1.1.0 but upgrading to

version 1.1.1 didn't help.