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 | 1 | initial version |
[FINALLY FIXED IT]
Reason:
I don't know that I need synchronize time between master (rpi4 ) and slave ( My labtop) . When the router connect to internet, It automatic synchronize time. When disconnect, time between master and slave is different.
How to solve: Reference this youtube link: https://www.youtube.com/watch?v=jxHP0Vycdaw&ab_channel=ICyb3r
Server My labtop
sudo apt install chrony -y
sudo nano /etc/chrony/chrony.conf
Add these like to the last line in chrony.conf. Allow client Ip to synchronize time
# Step the system clock instead of slewing it if the adjustment is larger than
# one second, but only in the first three clock updates.
makestep 1 3
local stratum 10
#manual
allow 192.168.1.0/24
smoothtime 400 0.01
Client : (Rpi4 board)
sudo apt install chrony -y
sudo nano /etc/chrony/chrony.conf
Disable update time from internet and add server Ip (My labtop) by adding # before them and add server 192.168.1.101 iburst prefer at last line:
#pool ntp.ubuntu.com iburst maxsources 4
#pool 0.ubuntu.pool.ntp.org iburst maxsources 1
#pool 1.ubuntu.pool.ntp.org iburst maxsources 1
#pool 2.ubuntu.pool.ntp.org iburst maxsources 2
server 192.168.1.101 iburst prefer
Check your setup:
sudo nano systemctl restart chrony
chronyc tracking
Reference ID : C0A80165 (192.168.1.101)
Stratum : 11
If it show like this, it is ok .
| | 2 | No.2 Revision |
[FINALLY FIXED IT]
Reason:
I don't know that I need synchronize time between master (rpi4 ) and slave ( My labtop) . When the router connect to internet, It automatic synchronize time. When disconnect, time between master and slave is different.
Slave
export ROS_IP=$(hostname -I | awk '{print $1;}')
export ROS_HOSTNAME=$ROS_IP
export ROS_MASTER_URI=http://192.168.1.100:11311
Master
export ROS_IP=$(hostname -I | awk '{print $1;}')
export ROS_HOSTNAME=$ROS_IP
How to solve: Reference this youtube link: https://www.youtube.com/watch?v=jxHP0Vycdaw&ab_channel=ICyb3r
Server My labtop
sudo apt install chrony -y
sudo nano /etc/chrony/chrony.conf
Add these like to the last line in chrony.conf. Allow client Ip to synchronize time
# Step the system clock instead of slewing it if the adjustment is larger than
# one second, but only in the first three clock updates.
makestep 1 3
local stratum 10
#manual
allow 192.168.1.0/24
smoothtime 400 0.01
Client : (Rpi4 board)
sudo apt install chrony -y
sudo nano /etc/chrony/chrony.conf
Disable update time from internet and add server Ip (My labtop) by adding # before them and add server 192.168.1.101 iburst prefer at last line:
#pool ntp.ubuntu.com iburst maxsources 4
#pool 0.ubuntu.pool.ntp.org iburst maxsources 1
#pool 1.ubuntu.pool.ntp.org iburst maxsources 1
#pool 2.ubuntu.pool.ntp.org iburst maxsources 2
server 192.168.1.101 iburst prefer
Check your setup:
sudo nano systemctl restart chrony
chronyc tracking
Reference ID : C0A80165 (192.168.1.101)
Stratum : 11
If it show like this, it is ok .
| | 3 | No.3 Revision |
[FINALLY FIXED IT]
Reason:
I don't know that I need synchronize time between master (rpi4 ) and slave ( My labtop) . When the router connect to internet, It automatic synchronize time. When disconnect, time between master and slave is different. And you need export enviroment parameter for ROS Communication:
Slave
export ROS_IP=$(hostname -I | awk '{print $1;}')
export ROS_HOSTNAME=$ROS_IP
export ROS_MASTER_URI=http://192.168.1.100:11311
Master
export ROS_IP=$(hostname -I | awk '{print $1;}')
export ROS_HOSTNAME=$ROS_IP
How to solve: Synchronize time use Chrony NTP Service [ Local Server ] and Client. Reference this youtube link: https://www.youtube.com/watch?v=jxHP0Vycdaw&ab_channel=ICyb3r
Server My labtop
sudo apt install chrony -y
sudo nano /etc/chrony/chrony.conf
Add these like to the last line in chrony.conf. Allow client Ip to synchronize time
# Step the system clock instead of slewing it if the adjustment is larger than
# one second, but only in the first three clock updates.
makestep 1 3
local stratum 10
#manual
allow 192.168.1.0/24
smoothtime 400 0.01
Client : (Rpi4 board)
sudo apt install chrony -y
sudo nano /etc/chrony/chrony.conf
Disable update time from internet and add server Ip (My labtop) by adding # before them and add server 192.168.1.101 iburst prefer at last line:
#pool ntp.ubuntu.com iburst maxsources 4
#pool 0.ubuntu.pool.ntp.org iburst maxsources 1
#pool 1.ubuntu.pool.ntp.org iburst maxsources 1
#pool 2.ubuntu.pool.ntp.org iburst maxsources 2
server 192.168.1.101 iburst prefer
Check your setup:
sudo nano systemctl restart chrony
chronyc tracking
Reference ID : C0A80165 (192.168.1.101)
Stratum : 11
If it show like this, it is ok .
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