LoRaWAN with MultiTech Conduit Gateway

[Andrew Neil]

Posted on October 20, 2017 at 19:16

I have:

• B-L072Z-LRWAN1 Discovery board (based on muRata module)
• P-NUCLEO-LRWAN1 Pack (Nucleo-64 board with Semtech SX1272 bare chip add-on).
• I-CUBE-LRWAN firmware pack, v1.1.2
• Keil MDK for STM32L0/F0, v5.24a
• MultiTech Conduit gateway (as part of a LoRaWAN Starter Kit)

all of the above purchased/downloaded in the last couple of weeks - so up-to-date.

I have watched this video: 

https://www.youtube.com/watch?time_continue=497&v=np6oYopJyFI

 

But it is out-of-date with both the 

I-CUBE-LRWAN firmware  and the Conduit.

See: 

https://community.st.com/community/stm32-community/blog/2016/11/30/stm32-lora-kit&sharpcomment-3834

 

It seems that the 

demo called ''Class A'' in the video is now called ''End Node''.

So I think I managed to find all the points to tweak as mentioned in the video.

Not mentioned in the video is that STATIC_DEVICE_EUI has to be set for the LORAWAN_DEVICE_EUI edits to be effective!

The code built fine for the two boards, and downloads and runs.

I only run one board at a time. Both boards behave identically.

The Conduit sees the board as ''Joined'', but the Node-RED does not see any incoming data.

I don't see any ''JOINED'' message in the UART output from the board (the video shows one, but the UM2073 documentation says nothing about what should currently be expected on the UART).

Using the 'Download Logs' from the Conduit, the messages log contains stuff like:

Oct 20 08:03:18 mtcdt user.info lora-network-server: Parsing 1 rx packets

Oct 20 08:03:18 mtcdt user.info lora-network-server: Received join request

Oct 20 08:03:18 mtcdt user.info lora-network-server: Device found in DB, assigning address: 1

Oct 20 08:03:18 mtcdt user.info lora-network-server: Queue join response 33 bytes

Oct 20 08:03:18 mtcdt user.info lora-network-server: Send Join Accept - EUI: be-7a-00-00-00-00-00-c8 ADDR: 00000001

Oct 20 08:03:18 mtcdt user.info lora-network-server: Schedule TX Time on air: 81 ms

Oct 20 08:03:19 mtcdt user.info lora-network-server: Frame transmitted to 00:00:00:01 via GW (00:80:00:00:a0:00:05:a8 Chan LC2 127.0.0.1:34778) Seq♯ 0

Oct 20 08:03:19 mtcdt user.info lora-network-server: Update DC Band: 1 Duration: 71 time-on-air available: 35929 ms

Oct 20 08:03:19 mtcdt user.info lora-network-server: Transmit UDP message to Gateway 208 bytes

Oct 20 08:03:48 mtcdt user.info lora-network-server: Parsing 1 rx packets

Oct 20 08:03:48 mtcdt user.warn lora-network-server:

Recv'd frame failed CRC check

Oct 20 08:03:49 mtcdt user.info lora-network-server: Parsing 1 rx packets

Oct 20 08:03:49 mtcdt user.warn lora-network-server:

Recv'd frame failed CRC check

CRC errors would explain why the received data is not being seen.

So: has anyone actually got this working with a Conduit gateway using the current firmware?

The fact that the behaviour is the same for the 2 boards suggests that it's a configuration issue rather than a HW fault.

I also have some MultiTech mDot modules, and they communicated with the Conduit as originally configured.

#b-l072z-lrwan1 #multitech #p-nucleo-lrwan1 #lora #lorawan #stm32-l0

[Andrew Neil]

Posted on October 21, 2017 at 17:52

The key thing that I'd missed (which is shown in the video) is that the Conduit's LoRa Network Server must be set to Public:

With that, I do now see 'JOINED' in the STM32 UART output, and there is something being received in the Node-RED - although it is currently barfing on it ...

[Andrew Neil]

Posted on October 23, 2017 at 14:06

For info, MultiTech's documentation says:

'Enable public compatibility mode: changes the join response time from 1 to 5 seconds and the sync word from 0×12 to 0×34'

http://www.multitech.net/developer/software/lora/conduit-aep-lora-communication/conduit-aep-advanced-lora-network-server-configuration/

In the I-CUBE-LRWAN code, commissioning.h has:

/*!
 * Indicates if the end-device is to be connected to a private or public network
 */
#define LORAWAN_PUBLIC_NETWORK true
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and the sx1h and sx1h files have:

/*!
 * Sync word for Private LoRa networks
 */
#define LORA_MAC_PRIVATE_SYNCWORD 0x12
/*!
 * Sync word for Public LoRa networks
 */
#define LORA_MAC_PUBLIC_SYNCWORD 0x34
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