Difference between revisions of "Raspberry Pi 3B+ 802.15.4/6LoWPAN Setup"
Line 273: | Line 273: | ||
* [[Raspberry_Pi_3,_Model_B%2B,_WLAN,_BT]] | * [[Raspberry_Pi_3,_Model_B%2B,_WLAN,_BT]] | ||
* https://openlabs.co/store/Raspberry-Pi-802.15.4-radio | * [[Raspberry_Pi_802.15.4_radio_module]] https://openlabs.co/store/Raspberry-Pi-802.15.4-radio | ||
* Optional/alternatively (not tested): [[Raspberry_Pi_6LoWPAN_SLIP_radio_module|Raspberry Pi 6LoWPAN SLIP radio module]] | * Optional/alternatively (not tested): [[Raspberry_Pi_6LoWPAN_SLIP_radio_module|Raspberry Pi 6LoWPAN SLIP radio module]] | ||
* SAMR21-xpro: | * SAMR21-xpro: |
Revision as of 19:30, 28 November 2023
Summary
Information on how to setup a Raspberry Pi 3B+ for 802.15.4 radio/6LoWPAN communication by utilizing an Openlabs 802.15.4 radio module.
This was tested successfully with Raspbian 10 (Buster) and Raspbian 11 (Bullseye). I assume it is also working on the latest Raspbian 12 (Bookworm).
Requirements
- Raspberry Pi 3B+
- Operating system: Raspberry Pi OS (Raspbian)
- Openlabs 802.15.4 radio module: https://openlabs.co/store/Raspberry-Pi-802.15.4-radio
- Optional/alternatively (not tested yet): Raspberry Pi 6LoWPAN SLIP radio module
Setup/Config 802.15.4/6LoWPAN on a Raspberry
Install Raspbian on Raspberry Pi 3B+
- Use Raspberry Pi Imager
- Optional: Download Raspbian/Raspberry Pi OS from https://www.raspberrypi.com/software/operating-systems/
Preparation of Raspbian
Access the Raspberry Pi by attaching it via HDMI to a monitor. After enabling SSH it is possible to connect via SSH/terminal (default credentials are pi:raspberry).
- (Optionally) Change keyboard setting to "German" and reboot:
sudo dpkg-reconfigure keyboard-configuration
- Activate and start SSH on Raspberry:
sudo systemctl start ssh sudo systemctl enable ssh
- Upgrade of Raspbian:
sudo apt update && sudo apt upgrade
Enable support for IEEE 802.15.4/LoWPAN devices
- Plug the OpenLabs 802.15.4 radio module directly onto pins 15-26 of the Raspberry's P1 header (in the middle):
- There is an existing overlay for this transceiver shipped with Raspbian, should be in
/boot/overlays/at86rf233-overlay.dtb
or/boot/overlays/at86rf233.dtbo
:
ls /boot/overlays/at86rf233.dtbo
- Enable transceiver by modifying the
/boot/config.txt
file and reboot:
Installation of Linux WPAN tools
Sources/Links: see References:#Linux WPAN tools
- First install
git
and clone the wpan-tools Repository:
sudo apt install git sudo mkdir /opt/src sudo chown pi /opt/src cd /opt/src git clone https://github.com/linux-wpan/wpan-tools
- Install some required packages before building the wpan-tools:
sudo apt install dh-autoreconf libnl-3-dev libnl-genl-3-dev
- Configure, build and install wpan-tools:
cd /opt/src/wpan-tools ./autogen.sh ./configure CFLAGS='-g -O0' --prefix=/usr --sysconfdir=/etc --libdir=/usr/lib make sudo make install
- Verification/test of wpan-tools installation:
iwpan dev
MANUAL WPAN interface configuration
Sources/Links: see References:#WPAN interface configuration
- Configure the default PAN ID of RIOT-OS/SAMR21-xpro:
0x23
- Configure the default channel ID of RIOT-OS/SAMR21-xpro:
26
ip link set lowpan0 down ip link set wpan0 down iwpan phy phy0 set channel 0 26 # same network ID and channel as RIOT default iwpan dev wpan0 set pan_id 0x23 # same network ID and channel as RIOT default ip link add link wpan0 name lowpan0 type lowpan ip link set wpan0 up ip link set lowpan0 up
- Afterwards the
lowpan0
interface on Raspberry has a link-local IPv6 address:
root@raspberrypi:~# ip a 1: lo: [...] 2: eth0: [...] 3: wlan0: [...] 4: wpan0: <BROADCAST,NOARP,UP,LOWER_UP> mtu 123 qdisc pfifo_fast state UNKNOWN group default qlen 300 link/ieee802.15.4 36:3a:07:cc:65:41:2b:31 brd ff:ff:ff:ff:ff:ff:ff:ff 5: lowpan0@wpan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1280 qdisc noqueue state UNKNOWN group default qlen 1000 link/6lowpan 36:3a:07:cc:65:41:2b:31 brd ff:ff:ff:ff:ff:ff:ff:ff inet6 fe80::343a:7cc:6541:2b31/64 scope link valid_lft forever preferred_lft forever
NOTE/CAUTION: Every reboot changes the link-local IPv6 address of the lowpan0
interface on the Raspberry!
See #PERSISTENT wpan0 and lowpan0 configuration to configure a persistent link-local address.
There are also scripts available to create/delete a lowpan interface (or to create/delete a monitor interface): https://github.com/RIOT-Makers/wpan-raspbian
PERSISTENT wpan0 and lowpan0 configuration
With static long hardware address and static link-local IPv6 address (to avoid a random link-local IPv6 address on each reboot).
Sources/Links: see References:#Persistent WPAN interface configuration
- Clone riot-makers/wpan-raspbian GitHub repo:
cd /opt/src git clone https://github.com/riot-makers/wpan-raspbian cd wpan-raspbian
- Copy some helper (shell) scripts to a well-known location:
sudo cp -r usr/local/sbin/* /usr/local/sbin/. sudo chmod +x /usr/local/sbin/*
- Afterwards copy files for systemd integration:
sudo cp etc/default/lowpan /etc/default/. sudo cp etc/systemd/system/lowpan.service /etc/systemd/system/.
- Modify 802.15.4 channel ID and PAN ID in
/etc/default/lowpan
as needed:
sudo nano /etc/default/lowpan CHN="13" PAN="0xbeef" # set MAC to "" for random mac/hw address MAC="02:0:0:0:0:0:0:1" # set IPv6 to "" if not required; note: set a prefix length #IP6="fdaa:bb:cc:dd::1/64" # Set ACK requests (Only enable if all devices on your PAN support ACKs) ACKREQ=0
Note: MAC="02:0:0:0:0:0:0:1"
was taken from https://jan.newmarch.name/IoT/LinuxJournal/Routing/, this results in a link-local address of fe80::1
for the Raspberry.
- Enable
lowpan.service
autostart, start 6LoWPAN service and verification:
sudo systemctl enable lowpan.service sudo systemctl start lowpan.service ifconfig lowpan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1280 inet6 fe80::1 prefixlen 64 scopeid 0x20<link> unspec 02-00-00-00-00-00-00-01-00-00-00-00-00-00-00-00 txqueuelen 1000 (UNSPEC) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 19 bytes 2114 (2.0 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 wpan0: flags=195<UP,BROADCAST,RUNNING,NOARP> mtu 123 unspec 02-00-00-00-00-00-00-01-00-00-00-00-00-00-00-00 txqueuelen 300 (UNSPEC) RX packets 72 bytes 2016 (1.9 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 74 bytes 5320 (5.1 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
Verification of 6LoWPAN connectivity between a Raspberry and a SAMR21-xpro
- Use RIOT's gnrc_networking example and build it for the SAMR21-xpro board, flash the firmware to the SAMR21-xpro and connect via
pyterm
:
cd RIOT/examples/gnrc_networking make BOARD=samr21-xpro make BOARD=samr21-xpro flash make BOARD=samr21-xpro term
- Use
ifconfig
to determine the 802.15.4/6LoWPAN interface ID of SAMR21-xpro (7
in this case):
ifconfig # Iface 7 HWaddr: 57:98 Channel: 26 Page: 0 NID: 0x23 PHY: O-QPSK [...] # Long HWaddr: E2:F9:02:0F:36:26:A2:68 [...] # inet6 addr: fe80::e0f9:20f:3626:a268 scope: link VAL
- Note: All
ifconfig
config options can be shown withifconfig <interface id> set
.
- RIOT-OS default 802.15.4 channel is 26 and default PAN ID 0x23. If you change them, make sure to change them in the SAMR21-xpro configuration aswell:
- [optional] Change the channel to 13 and the PAN ID to 0xbeef (see RIOT-OS and IEEE 802.15.4 / 6LoWPAN for more information):
ifconfig 7 set pan_id 0xbeef ifconfig 7 set channel 13
Ping test from Raspberry to SAMR21-xpro
- Multicast ping test through interface
lowpan0
to groupff02::1
(all nodes in the link-local):
ping ff02::1%lowpan0 PING ff02::1%lowpan0(ff02::1%lowpan0) 56 data bytes 64 bytes from fe80::1%lowpan0: icmp_seq=1 ttl=64 time=0.195 ms 64 bytes from fe80::e0f9:20f:3626:a268%lowpan0: icmp_seq=1 ttl=64 time=10.4 ms (DUP!)
- Unicast ping (change to link-local IPv6 address of your SAMR21-xpro):
ping fe80::e0f9:20f:3626:a268%lowpan0 ping fe80::e0f9:20f:3626:a268%lowpan0 PING fe80::e0f9:20f:3626:a268%lowpan0(fe80::e0f9:20f:3626:a268%lowpan0) 56 data bytes 64 bytes from fe80::e0f9:20f:3626:a268%lowpan0: icmp_seq=1 ttl=64 time=23.0 ms [...]
Ping test from SAMR21-xpro to Raspberry
- Multicast ping test through interface 7 to group ff02::1:
# ping6 ff02::1%7 # 12 bytes from fe80::1%7: icmp_seq=0 ttl=64 rssi=-61 dBm time=8.309 ms # 12 bytes from fe80::1%7: icmp_seq=1 ttl=64 rssi=-61 dBm time=6.124 ms # 12 bytes from fe80::1%7: icmp_seq=2 ttl=64 rssi=-59 dBm time=6.461 ms # # --- ff02::1 PING statistics --- # 3 packets transmitted, 3 packets received, 0% packet loss # round-trip min/avg/max = 6.124/6.964/8.309 ms
- Unicast ping from SAMR21-xpro to Raspberry 6LoWPAN interface:
# ping6 fe80::1%7 # 12 bytes from fe80::1%7: icmp_seq=0 ttl=64 rssi=-61 dBm time=8.467 ms # 12 bytes from fe80::1%7: icmp_seq=1 ttl=64 rssi=-61 dBm time=7.966 ms
Test CoAP communication between Raspberry and SAMR21-xpro
- Install
python3-pip
andaiocoap
on Raspberry:
sudo apt install python3-pip pip3 install --upgrade "aiocoap[all]"
- Clone
aiocoap
repo and start the included simple CoAP server:
git clone https://github.com/chrysn/aiocoap.git cd aiocoap python3 server.py
- Use gcoap example on SAMR21-xpro (RIOT-OS repo already cloned):
cd ~/RIOT/example/gcoap make BOARD=samr21-xpro //build gcoap example make BOARD=samr21-xpro flash //flah gcoap to samr21-xpro make BOARD=samr21-xpro term //start pyterm
- [optional] Reset SAMR21-xpro and change 6LoWPAN settings:
ifconfig 7 set pan_id 0xbeef ifconfig 7 set channel 13
- Send a CoAP request to the CoAP server:
coap put [fe80::1%7] 5683 /send test
Possible Problems with 6LoWPAN, SAMR21-xpro and Raspberry Pi (with Openlabs 802.15.4 radio)
- 6LoWPAN: RIOT does not receive packets from Linux when short_addr is set #11033
- GitHub issue: https://github.com/RIOT-OS/RIOT/issues/11033
- By default this is not set (i.e. in RIOT gnrc_networking example!)
- Do not use Raspberry Pi 4 with OpenLabs 802.15.4 radio module:
- At least with the newest available Kernel (i.e. 5.10 during our tests) it was only possible to send 802.15.4 packets to SAMR21-xpro and the Raspberry did not receive any packets from SAMR21-xpro.
- It is better to use a Raspberry Pi 3B(+)
- Successfully tested with Raspbian 9 (Stretch), Raspbian 10 (Buster) and Raspbian 11 (Bullseye)
- Monitoring 802.15.4/6LoWPAN traffic: Correct channel ID must be set (RIOT-OS default: 26)
- Communication SAMR21-xpro<->Raspberry: The same channel ID (RIOT-OS default: 26) and PAN ID need to be set (RIOT-OS default: 0x23)
TODO: Monitoring/Sniffing 802.15.4/6LoWPAN radio with a Raspberry
Used Hardware
- Raspberry_Pi_3,_Model_B+,_WLAN,_BT
- Raspberry_Pi_802.15.4_radio_module https://openlabs.co/store/Raspberry-Pi-802.15.4-radio
- Optional/alternatively (not tested): Raspberry Pi 6LoWPAN SLIP radio module
- SAMR21-xpro:
Courses
- IT-Security master's programme: Mobile and Embedded Security ILV
References
- Documentation was (mostly) created based on our CoMatrix project: https://comatrix.eu
- Wiki: Riot-OS Setup
- https://comatrix.eu/setup/raspberry_pi_setup/
- https://openlabs.co/store/Raspberry-Pi-802.15.4-radio
- Wiki: RIOT-OS and IEEE 802.15.4 / 6LoWPAN
- Linux WPAN Tools: https://github.com/linux-wpan/wpan-tools
- Python CoAP implementation/library: https://github.com/chrysn/aiocoap
Linux WPAN tools
- https://github.com/RIOT-OS/RIOT/wiki/How-to-install-6LoWPAN-Linux-Kernel-on-Raspberry-Pi
- https://github.com/RIOT-Makers/wpan-raspbian/wiki/Create-a-generic-Raspbian-image-with-6LoWPAN-support
- https://github.com/RIOT-Makers/wpan-raspbian/wiki/Spice-up-Raspbian-for-the-IoT
WPAN interface configuration
- https://linux-wpan.org/documentation.html
- https://www.linuxjournal.com/content/low-power-wireless-6lowpan-ieee802154-and-raspberry-pi
- http://morschi.com/2017/04/05/hands-on-riot-6lowpan/