How do I test example project iot mqtt publish and subscribe projects?

RE: How do I test example project iot mqtt publish and subscribe projects?

bjorn-spockeli — Thu, 21 Feb 2019 14:43:42 GMT

Hi Pih,

I apologize for the late reply.

Are you running the command as sudo? i.e.

sudo ifconfig bt0 add 2001:db8::1/64

I beleive things must be done in the following order

# Log in as a root user.

sudo su

# Mount debugfs file system.

mount -t debugfs none /sys/kernel/debug

# Load 6LoWPAN module.

modprobe bluetooth_6lowpan

# Enable the bluetooth 6lowpan module.

echo 1 > /sys/kernel/debug/bluetooth/6lowpan_enable

# Look for available HCI devices.

hciconfig

# Reset HCI device - for example hci0 device.

hciconfig hci0 reset

# Read 00:AA:BB:XX:YY:ZZ address of the nRF5x device.

hcitool lescan

# Connect to the device.

echo "connect 00:AA:BB:XX:YY:ZZ 1" > /sys/kernel/debug/bluetooth/6lowpan_control

# Check if you have established a connection.

ifconfig

# Set IPv6 forwarding (must be present).

sudo echo 1 > /proc/sys/net/ipv6/conf/all/forwarding

# Run radvd daemon.

sudo service radvd restart

#Assign prefix

ifconfig bt0 add 2001:db8::1/64

# Observe if new IPv6 prefix is disseminating over bt0 interface.

ifconfig

# Try to ping the device using its link-local address, for example, on bt0 interface.

ping6 -I bt0 fe80::2AA:BBFF:FEXX:YYZZ

# Disconnect from the device.

echo "disconnect 00:AA:BB:XX:YY:ZZ" > /sys/kernel/debug/bluetooth/6lowpan_control

# Check if there are active connections left.

ifconfig

RE: How do I test example project iot mqtt publish and subscribe projects?

Olaf — Wed, 13 Feb 2019 07:19:33 GMT

"ifconfig bt0 add 2001:db8::1/64" didn't help

How can I find the root cause of why it's not working? Is it possible for you to run the example project on the same HW?

RE: How do I test example project iot mqtt publish and subscribe projects?

bjorn-spockeli — Fri, 08 Feb 2019 16:43:56 GMT

Hi Pih

you need to call

ifconfig bt0 add 2001:db8::1/64

to add the prefix, the radvd service does not do this as it shold i thinnk.

Bjørn

RE: How do I test example project iot mqtt publish and subscribe projects?

Olaf — Fri, 08 Feb 2019 00:22:03 GMT

Thanks good to know!

I am going through the 16 test steps of "pca10056 MQTT Client Publisher"

https://www.nordicsemi.com/DocLib/Content/SDK_Doc/nRF5_SDK/v15-2-0/iot_sdk_app_mqtt_publisher?1649#iot_sdk_app_mqtt_publisher_test

And the client startup advertising, push button 1 and it connect to 6lowpan router, push button 2 result in error code 0000c943, instead of connecting to the MQTT Broker.

What does the error code mean?

Can you tell me how to insert the brokers IPv6 addr correctly, please!

Is this correct inserted it in MQTT Client Publisher's main.c file. m_broker_addr

when:

linux mosquitto broker's IPv6 addr fe80::8292:9e6f:cc08:1520/64

windows mosquitto broker's Link-local IPv6: fe80::bdeb:857e:f92b:730f%13

This is the only place I have setup the MQTT brokers addr, is that correct?

In step 8 "Prepare the IPv6 global prefix for the btX interface" in the 6lowpan router.

I followed the guide

https://www.nordicsemi.com/DocLib/Content/SDK_Doc/nRF5_SDK/v15-2-0/iot_sdk_user_guides_radvd

Enter root user

sudo su

sudo apt-get install radvd

I modified the /etc/radvd.conf file

and ran

# Set IPv6 forwarding (must be present).

sudo echo 1 > /proc/sys/net/ipv6/conf/all/forwarding

# Run radvd daemon.

sudo service radvd restart

Commands had no errors, but not sure I could see this happen

"Observe if new IPv6 prefix is disseminating over bt0 interface"

ifconfig gave me this: bt0: inet6 fe80::b827..... and it should be 2001:db8::...

Please advise..

Help is appreciated!

RE: How do I test example project iot mqtt publish and subscribe projects?

bjorn-spockeli — Wed, 06 Feb 2019 15:22:55 GMT

Yes, after looking at some forums it should be ok to just create the REPORTING-BUGS file. It does not appear to be used by the kernel so this is a Ok way to fix the issue.

RE: How do I test example project iot mqtt publish and subscribe projects?

Olaf — Tue, 05 Feb 2019 06:40:58 GMT

Thanks, CCPREFIX was the problem. I exported in one terminal and I ran the build command from another terminal. It build successfully!

I hit the next error in step 6 Generate .deb packages.

plp@toby:~/Nordic-Semi/rpikernel/linux$ CONCURRENCY_LEVEL=5 DEB_HOST_ARCH=armhf fakeroot make-kpkg --append-to-version -plp --revision `date +%Y%m%d%H%M%S` --ARCH=arm --cross-compile ${CCPREFIX} kernel_image kernel_headers

...

install -p -o root -g root -m 644 REPORTING-BUGS /home/plp/Nordic-Semi/rpikernel/linux/debian/linux-headers-4.14.95-plp-v7+/usr/share/doc/linux-headers-4.14.95-plp-v7+/

install: cannot stat 'REPORTING-BUGS': No such file or directory

debian/ruleset/targets/headers.mk:40: recipe for target 'debian/stamp/install/linux-headers-4.14.95-plp-v7+' failed

make[1]: *** [debian/stamp/install/linux-headers-4.14.95-plp-v7+] Error 1

make[1]: Leaving directory '/home/plp/Nordic-Semi/rpikernel/linux'

debian/ruleset/local.mk:102: recipe for target 'kernel_headers' failed

make: *** [kernel_headers] Error 2

plp@toby:~/Nordic-Semi/rpikernel/linux$

One solution is just to create an empty REPORTING-BUGS file and it will compile,

but what do you say about it? Is there a better way to fix the error??

RE: How do I test example project iot mqtt publish and subscribe projects?

bjorn-spockeli — Mon, 04 Feb 2019 08:24:37 GMT

Have you exported the CCPREFIX correctly? You could try to replace ${CCPREFIX} with the actual path of the toolchain. See the two forum posts below:

https://www.raspberrypi.org/forums/viewtopic.php?t=76850

https://www.raspberrypi.org/forums/viewtopic.php?f=26&t=39592

RE: How do I test example project iot mqtt publish and subscribe projects?

Olaf — Fri, 01 Feb 2019 20:37:33 GMT

Hi,

Still moving forward..but I ran into some issues starting the cross compiling step 5! First issue was "No rule to make target '--j5'

I am using a Core i5 with 4 CPU cores, so it should be OK with --j5, anyway I tried again without --j5 and it resulted in GCC -option errors. see below.

The first 4 steps seem to be successful, not sure where the chain dropped off.

Some system info:

Ubuntu 16.04 LTS PC with 4 GB

plp@toby:~$ uname -a
Linux toby 4.4.0-141-generic #167-Ubuntu SMP Wed Dec 5 10:40:15 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

Any feedback is appreciated

Thanks.

plp@toby:~/Nordic-Semi/rpikernel/linux$ ARCH=arm CROSS_COMPILE=${CCPREFIX} make bcm2709_defconfig HOSTCC scripts/basic/fixdep

HOSTCC scripts/kconfig/conf.o

SHIPPED scripts/kconfig/zconf.tab.c

SHIPPED scripts/kconfig/zconf.lex.c

HOSTCC scripts/kconfig/zconf.tab.o

HOSTLD scripts/kconfig/conf

#

# configuration written to .config

#

plp@toby:~/Nordic-Semi/rpikernel/linux$ ARCH=arm CROSS_COMPILE=${CCPREFIX} INSTALL_MOD_PATH=${MODULES_TEMP} make –j5

scripts/kconfig/conf --silentoldconfig Kconfig

make: *** No rule to make target '–j5'. Stop.

plp@toby:~/Nordic-Semi/rpikernel/linux$ ARCH=arm CROSS_COMPILE=${CCPREFIX} INSTALL_MOD_PATH=${MODULES_TEMP} make –j5 modules

make: *** No rule to make target '–j5'. Stop.

plp@toby:~/Nordic-Semi/rpikernel/linux$ ARCH=arm CROSS_COMPILE=${CCPREFIX} INSTALL_MOD_PATH=${MODULES_TEMP} make

SYSHDR arch/arm/include/generated/uapi/asm/unistd-common.h

SYSHDR arch/arm/include/generated/uapi/asm/unistd-oabi.h

SYSHDR arch/arm/include/generated/uapi/asm/unistd-eabi.h

CHK include/config/kernel.release

UPD include/config/kernel.release

WRAP arch/arm/include/generated/uapi/asm/bitsperlong.h

WRAP arch/arm/include/generated/uapi/asm/errno.h

WRAP arch/arm/include/generated/uapi/asm/ioctl.h

WRAP arch/arm/include/generated/uapi/asm/ipcbuf.h

WRAP arch/arm/include/generated/uapi/asm/msgbuf.h

WRAP arch/arm/include/generated/uapi/asm/param.h

WRAP arch/arm/include/generated/uapi/asm/poll.h

WRAP arch/arm/include/generated/uapi/asm/resource.h

WRAP arch/arm/include/generated/uapi/asm/sembuf.h

WRAP arch/arm/include/generated/uapi/asm/shmbuf.h

WRAP arch/arm/include/generated/uapi/asm/siginfo.h

WRAP arch/arm/include/generated/uapi/asm/socket.h

WRAP arch/arm/include/generated/uapi/asm/sockios.h

WRAP arch/arm/include/generated/uapi/asm/termbits.h

WRAP arch/arm/include/generated/uapi/asm/termios.h

WRAP arch/arm/include/generated/asm/clkdev.h

WRAP arch/arm/include/generated/asm/current.h

WRAP arch/arm/include/generated/asm/early_ioremap.h

WRAP arch/arm/include/generated/asm/emergency-restart.h

WRAP arch/arm/include/generated/asm/exec.h

WRAP arch/arm/include/generated/asm/extable.h

WRAP arch/arm/include/generated/asm/irq_regs.h

WRAP arch/arm/include/generated/asm/kdebug.h

WRAP arch/arm/include/generated/asm/local.h

WRAP arch/arm/include/generated/asm/local64.h

WRAP arch/arm/include/generated/asm/mm-arch-hooks.h

WRAP arch/arm/include/generated/asm/msi.h

WRAP arch/arm/include/generated/asm/parport.h

WRAP arch/arm/include/generated/asm/preempt.h

WRAP arch/arm/include/generated/asm/rwsem.h

WRAP arch/arm/include/generated/asm/seccomp.h

WRAP arch/arm/include/generated/asm/segment.h

WRAP arch/arm/include/generated/asm/serial.h

WRAP arch/arm/include/generated/asm/simd.h

WRAP arch/arm/include/generated/asm/sizes.h

WRAP arch/arm/include/generated/asm/timex.h

WRAP arch/arm/include/generated/asm/trace_clock.h

CHK include/generated/uapi/linux/version.h

UPD include/generated/uapi/linux/version.h

CHK include/generated/utsrelease.h

UPD include/generated/utsrelease.h

HOSTCC scripts/basic/bin2c

SYSNR arch/arm/include/generated/asm/unistd-nr.h

GEN arch/arm/include/generated/asm/mach-types.h

SYSTBL arch/arm/include/generated/calls-oabi.S

SYSTBL arch/arm/include/generated/calls-eabi.S

CC kernel/bounds.s

gcc: error: unrecognized argument in option ‘-mabi=aapcs-linux’

gcc: note: valid arguments to ‘-mabi=’ are: ms sysv

gcc: error: unrecognized command line option ‘-mlittle-endian’

gcc: error: unrecognized command line option ‘-mapcs’

gcc: error: unrecognized command line option ‘-mno-sched-prolog’

gcc: error: unrecognized command line option ‘-mfpu=vfp’

Kbuild:21: recipe for target 'kernel/bounds.s' failed

make[1]: *** [kernel/bounds.s] Error 1

Makefile:1084: recipe for target 'prepare0' failed

make: *** [prepare0] Error 2

plp@toby:~/Nordic-Semi/rpikernel/linux$

RE: How do I test example project iot mqtt publish and subscribe projects?

bjorn-spockeli — Thu, 31 Jan 2019 08:27:46 GMT

Use the second kernel config command, it should be # If Raspberry Pi 2/3, see https://www.raspberrypi.org/documentation/linux/kernel/configuring.md.

# If Raspberry Pi 2.

pi@raspberry:~/raspbian/kernel/linux$ make bcm2709_defconfig

I am afraid that I do not know the requirements for the Ubuntu/Debian OS with the required modules and I do not know which single board computers that are equivalent to the Raspberry Pi.

RE: How do I test example project iot mqtt publish and subscribe projects?

Olaf — Thu, 31 Jan 2019 00:47:10 GMT

Thanks again,

Just a few more questions

https://www.nordicsemi.com/DocLib/Content/SDK_Doc/nRF5_SDK/v15-2-0/iot_rpi_kernel

What default kernel config command do I run if I am using RPi 3?

If I should replace the RPi with other HW, what are the requirements?

Any Ubuntu/Debian system with min. same amount of Flash and RAM as RPi, WiFi radio and

a USB port for the BLE dongle?

RE: How do I test example project iot mqtt publish and subscribe projects?

bjorn-spockeli — Wed, 30 Jan 2019 15:16:31 GMT

Yes, that is correct. Yes, I have set up the Raspberry Pi as BLE/ Wifi Router, see Setting up BLE 6LoWPAN Border Router.

RE: How do I test example project iot mqtt publish and subscribe projects?

Olaf — Wed, 30 Jan 2019 14:05:45 GMT

Thank you Bjorn for links to example projects and test documentation.

Learned a lot from ATT_MTU example, returning to MQTT example

I have a question to the "BLE enabled router"

The nRF52840DK doesn't have wifi so it cannot act as the BLE/WIFI router unless I add a wifi module to it! Is that correct? Can I use a Raspberry Pi as BLE/WIFI router?

What HW is best to test MQTT example project?

Thanks

RE: How do I test example project iot mqtt publish and subscribe projects?

bjorn-spockeli — Tue, 29 Jan 2019 15:29:23 GMT

You mean just a regular BLE connection ? If that is the case, then you should take a look at the Experimental: ATT_MTU Throughput Example.

RE: How do I test example project iot mqtt publish and subscribe projects?

Olaf — Tue, 29 Jan 2019 15:19:08 GMT

Thanks for your reply. If I don't have the option of a 3rd device MQTT broker, is there a preferred protocol / best way to send and receive data/commands between two BLE devices? I assume it has to be a master-slave relationship, and payload be structured as a JSON document, and it has to be BLE5 to have a payload size of 253 bytes.

Thanks

RE: How do I test example project iot mqtt publish and subscribe projects?

bjorn-spockeli — Tue, 29 Jan 2019 12:08:22 GMT

Yes, you need a 3rd device that acts as the MQTT Broker, see Setting up the Mosquitto MQTT broker for information on how to set this up on a Windows, Linux or OS X device.

The MQTT examples are documented here, Experimental: IoT Examples / MQTT. Each example have a Testing subsection in their documentation, explaining step by step how to test the examples, see

MQTT Client - Publisher / Testing

MQTT Client - Subscriber / Testing

Best regards
Bjørn