[[searchwing-image-download-station]]

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searchwing-image-download-station [2020/02/14 14:36]
beckmanf created
searchwing-image-download-station [2020/02/27 09:06]
beckmanf changed SSID names
Line 1: Line 1:
 ===== Image Download station ===== ===== Image Download station =====
  
-The images are stored on the two Raspberry Pi Zeros. The Image download station provides image download via two parallel Wifi links from the drone. The image download station is based on two [[https://​www.gl-inet.com/​products/​gl-ar750/​|GL-AR750]] access points.+The images are stored on the two Raspberry Pi Zeros. The Image download station provides image download via two parallel Wifi links from the drone. The image download station is based on two [[https://​www.gl-inet.com/​products/​gl-ar750/​|GL-AR750]] access points. ​The datatransfer itself is handled by rsync via its rsync protocoll which doesnt rely on SSH. SSH is not used as the pi zero is not fast enough to encrypt the huge data we want to transfer for each flight. 
 + 
 +==== Access points ==== 
 + 
 +=== AP1 === 
 + 
 +This is the main router which provides DHCP service. 
 + 
 +Router IP: 192.168.8.1 
 + 
 +Admin password: XXXXXXXXXXXXXXX 
 + 
 +WAN Port is Lan Port  
 + 
 +2.4 GHz SSID: SW-AP1 
 +Channel 1 
 +WIFI Password: XXXXXX 
 +TX Power: 10 dBm 
 +300 MBit 
 + 
 +5 GHz SSID: SW-AP1-5G 
 +Channel 36 
 +WIFI Password: XXXXX 
 +TX Power: 20 dbm 
 + 
 +=== AP2 === 
 + 
 +This router is connected with the WAN port to a LAN port of AP1.  
 + 
 +Router IP: 192.168.8.200 
 + 
 +Admin Password: XXXXX 
 + 
 +WAN Port is Lan Port  
 + 
 +2.4 GHz SSID: SW-AP2 
 +Channel 11 
 +WIFI Password: XXXXX 
 +TX Power: 10 dBm 
 + 
 +5 GHz SSID: SW-AP2-5G 
 +WIFI Password: XXXXX 
 +Channel: 44 
 +433MBit 
 +TX Power: 20 dbm  
 + 
 +====  setup Laptop ==== 
 +Configure datastorage with rsync in ''/​etc/​rsyncd.conf''​ on ship laptop. 
 + 
 +Each flight should have a unique name and needs two folders to be configured.  
 +e.g. 
 + 
 +<​code>​ 
 +[ringo-05032020_0915h-cam-r] 
 +path=/​home/​USER/​flightdata/​ringo-05032020_0915h-cam-r 
 +hosts allow = * 
 +list = true 
 +uid = root 
 +gid = root 
 +read only = false 
 + 
 +[ringo-05032020_0915h-cam-l] 
 +path=/​home/​USER/​flightdata/​ringo-05032020_0915h-cam-l 
 +hosts allow = * 
 +list = true 
 +uid = root 
 +gid = root 
 +read only = false 
 +</​code>​ 
 + 
 +__**IMPORTANT** Please add cam-r or cam-l at the end, as this encoding is needed for the searchwing-gui to work in correct manner **IMPORTANT**__ 
 + 
 + 
 +start rsync daemon on ship laptop 
 + 
 +  sudo systemctl start rsync 
 + 
 +====  transfer images ==== 
 + 
 +run datatransfer task on each pi ( later triggered via script @ groundcontrol pc): e.g. 
 + 
 +  rsync -avv -u --progress -h /​data/​bilder/​ rsync://​GROUNDSTATIONIP/​ringo-05032020_0915h-cam-r 
 +   
 +Don't use the -z option which compresses the data. The images are already compressed and the CPU load will result in 1 MB/s transfer rate compared to 3-4 MB/s without the -z option. (Beck, 23.2.20) 
 + 
 +====  troubleshooting ==== 
 + 
 +  rsync error: error starting client-server protocol (code 5) at main.c(1675) [sender=3.1.3] 
 + 
 +Check if folder on receiverside exists.  
 + 
 +To get an idea whats the cause of the error - checkout rsync service status on receiverside (laptop): 
 + 
 +  sudo systemctl status rsync 
  • searchwing-image-download-station.txt
  • Last modified: 2021/03/20 14:44
  • by bjoernh1