Hello,
I was trying to setup nrf5 board with IoT sdk for tcp connections where the tcp board will act as a server and raspberry pi 3 model B 1.2 as client.
I downloaded the SDK from the following link
Because latest v17.0.2 IoT TCP example that I could locate. Once the sample TCP server was installed on nrf dk board. LED1 turned on.
For raspberry pi the following steps were done.
root@raspberrypi:/home/pi/blll# cat /etc/sysctl.conf | grep ipv6
net.ipv6.conf.all.forwarding=1
#net.ipv6.conf.all.accept_redirects = 0
#net.ipv6.conf.all.accept_source_route = 0
root@raspberrypi:/home/pi/blll# sudo dpkg -l | grep bluez
ii bluez 5.50-1.2~deb10u1+rpt2 armhf Bluetooth tools and daemons
ii bluez-firmware 1.2-4+rpt7 all Firmware for Bluetooth devices
root@raspberrypi:/home/pi/blll# sudo dpkg -l | grep radvd
ii radvd 1:2.17-2 armhf Router Advertisement Daemon
root@raspberrypi:/home/pi/blll# sudo dpkg -l | grep libcap-ng0
ii libcap-ng0:armhf 0.7.9-2 armhf An alternate POSIX capabilities library
root@raspberrypi:/home/pi/blll# uname -a
Linux raspberrypi 5.4.83-v7+ #1379 SMP Mon Dec 14 13:08:57 GMT 2020 armv7l GNU/Linux
root@raspberrypi:/home/pi/blll# cat /etc/radvd.conf
interface bt0
{
AdvSendAdvert on;
prefix 2001:db8::/64
{
AdvOnLink off;
AdvAutonomous on;
AdvRouterAddr on;
};
};
root@raspberrypi:/home/pi/blll# echo 1 > /proc/sys/net/ipv6/conf/all/forwarding
root@raspberrypi:/home/pi/blll# service radvd restart
The connection links were referred as follows -
root@raspberrypi:/home/pi/blll# mount -t debugfs none /sys/kernel/debug
root@raspberrypi:/home/pi/blll# modprobe bluetooth_6lowpan
root@raspberrypi:/home/pi/blll# echo 1 > /sys/kernel/debug/bluetooth/6lowpan_enable
root@raspberrypi:/home/pi/blll# hciconfig
hci0: Type: Primary Bus: UART
BD Address: B8:27:EB:7B:84:E8 ACL MTU: 1021:8 SCO MTU: 64:1
UP RUNNING
RX bytes:1476 acl:0 sco:0 events:90 errors:0
TX bytes:3512 acl:0 sco:0 commands:90 errors:0
root@raspberrypi:/home/pi/blll# hciconfig hci0 reset
root@raspberrypi:/home/pi/blll#
root@raspberrypi:/home/pi/blll# hciconfig
hci0: Type: Primary Bus: UART
BD Address: B8:27:EB:7B:84:E8 ACL MTU: 1021:8 SCO MTU: 64:1
UP RUNNING
RX bytes:2186 acl:0 sco:0 events:131 errors:0
TX bytes:4282 acl:0 sco:0 commands:131 errors:0
root@raspberrypi:/home/pi/blll# hcitool lescan
LE Scan ...
00:02:BE:51:03:08 TCP_Server
00:02:BE:51:03:08 (unknown)
^Croot@raspberrypi:/home/pi/blll# echo "connect 00:02:BE:51:03:08 1" > /sys/kernel/debug/bluetooth/6lowpan_control
Now on board LED2 has started and LED 1 is off which is as per documentation.
root@raspberrypi:/home/pi/blll# lsmod | grep bluetooth_6lowpan
bluetooth_6lowpan 20480 1
6lowpan 28672 8 nhc_udp,nhc_routing,nhc_mobility,bluetooth_6lowpan,nhc_fragment,nhc_dest,nhc_hop,nhc_ipv6
bluetooth 360448 30 bluetooth_6lowpan,hci_uart,bnep,btbcm,rfcomm
ipv6 458752 50 bluetooth_6lowpan,6lowpan
root@raspberrypi:/home/pi/blll# sudo echo 2 > /proc/sys/net/ipv6/conf/bt0/accept_ra
root@raspberrypi:/home/pi/blll# service radvd restart
root@raspberrypi:/home/pi/blll# ifconfig bt0
bt0: flags=4161<UP,RUNNING,MULTICAST> mtu 1280
inet6 fe80::b827:ebff:fe7b:84e8 prefixlen 64 scopeid 0x20<link>
inet6 2001:db8::b827:ebff:fe7b:84e8 prefixlen 64 scopeid 0x0<global>
unspec B8-27-EB-7B-84-E8-00-00-00-00-00-00-00-00-00-00 txqueuelen 1000 (UNSPEC)
RX packets 5 bytes 157 (157.0 B)
RX errors 0 dropped 2 overruns 0 frame 0
TX packets 40 bytes 3570 (3.4 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
root@raspberrypi:/home/pi/blll# ping6 -I bt0 fe80::02:beff:fe51:0308
ping6: Warning: source address might be selected on device other than bt0.
PING fe80::02:beff:fe51:0308(fe80::2:beff:fe51:308) from :: bt0: 56 data bytes
64 bytes from fe80::2:beff:fe51:308%bt0: icmp_seq=1 ttl=255 time=79.4 ms
64 bytes from fe80::2:beff:fe51:308%bt0: icmp_seq=2 ttl=255 time=101 ms
64 bytes from fe80::2:beff:fe51:308%bt0: icmp_seq=3 ttl=255 time=74.9 ms
64 bytes from fe80::2:beff:fe51:308%bt0: icmp_seq=4 ttl=255 time=97.6 ms
^C
--- fe80::02:beff:fe51:0308 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 7ms
rtt min/avg/max/mdev = 74.853/88.329/101.493/11.397 ms
The above ping shows that the board is pinging using lowpan module.
root@raspberrypi:/home/pi/blll# cat pyCode1.py
from socket import *
import struct
import sys
SERVER_ADDR = 'fe80::02:beff:fe51:0308%bt0'
SERVER_PORT = 9000
sequence_number = 1
addrinfo = getaddrinfo(SERVER_ADDR, SERVER_PORT, AF_INET6, SOCK_STREAM)
#sock = socket.socket(socket.AF_INET6, socket.SOCK_STREAM)
(family, socktype, proto, canonname, sockaddr) = addrinfo[0]
sock = socket(family, socktype, proto)
sock.connect(sockaddr)
while sequence_number < 101 :
data = struct.pack("!I", sequence_number)
data += 'Ping'
sock.sendto(data, (SERVER_ADDR, SERVER_PORT, 0, 0))
recv_data = sock.recvfrom(8)
print(recv_data)
rx_sequence_number = struct.unpack("!I", recv_data[0][:4])[0]
if sequence_number is not rx_sequence_number:
print("Sequence number mismatch!")
sequence_number+= 1
sock.close()
del sock
root@raspberrypi:/home/pi/blll# python3 pyCode1.py
Traceback (most recent call last):
File "pyCode1.py", line 11, in <module>
sock.connect(sockaddr)
TimeoutError: [Errno 110] Connection timed out
I have referred to one of the following links but no help -
Thanks in advance.
