Esoc Radio and Cybernetics Clubs

Satnogs (Esoc Radio and Cybernetics Club) and

Eumetcast Weather Satellite Image Reception Build Notes and Guidelines. Mark Drapes 20220729

Satnogs build

Satnogs operations

Eumetcast Weather Satellite SW Build

Eumetcast Weather Satellite SW operations

 

 

 
 
 
 
Satnogs Operations

Esoc Radio Club special instructions, no internet, using tethered mobile
Power up
Quick test of Internet Connectivity on RPI: Open Gpredict. If the connection to the internet has been made the current date and time will be correct and you can download the TLE updates. Note when it is powered down the RPI has no onboard CTC clock, on power up the time it displays is the time it last made contact with the internet
 
For RPI with Satnogs no-gui image build, SD4 connect via putty (no gui)

 

Test that the CP2102 TTY Interface and RTL SDR are connected ok (note:the RPI mainboard itself has 3 devices on it): lsusb

Bus 001 Device 005: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T

Bus 001 Device 004: ID 10c4:ea60 Cygnal Integrated Products, Inc. CP2102/CP2109 UART Bridge Controller [CP210x family]

Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp. SMSC9512/9514 Fast Ethernet Adapter

Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp. SMC9514 Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

 
 
Further test on RTLSDR: sudo rtl_test
Found 1 device(s):
0: Realtek, RTL2838UHIDIR, SN: 00000001
Using device 0: Generic RTL2832U OEM
Found Rafael Micro R820T tuner
Supported gain values (29): 0.0 0.9 1.4 2.7 3.7 7.7 8.7 12.5 14.4 15.7 16.6 19.7 20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4 37.2 38.6 40.2 42.1 43.4 43.9 44.5 48.0 49.6
[R82XX] PLL not locked!
Sampling at 2048000 S/s.
Info: This tool will continuously read from the device, and report if
samples get lost. If you observe no further output, everything is fine.
Reading samples in async mode...
Allocating 15 zero-copy buffers
lost at least 200 bytes
 
 

 

Testing rotctl and rotctld (hamlib)

Set and Test USB port speed and connection to CP2102 USB-TTY card. Check the CP2102 is plugged in.

sudo rotctl -m 204 -s 19200 -r /dev/ttyUSB0 -vvvvv

sets parameters for controller board type, port speed, port, verbose logging.

Should get the following:

rotctl,

Hamlib 3.3 Report bugs to <hamlib-developer@lists.sourceforge.net>

rot_init

called initrots3_easycomm called rot_register (201) rot_register (202) rot_register (204) rot_open

called serial_open called serial_setup

called Opened rot model 204, 'EasycommIII' rig_strstatus called Backend version: 0.4, Status:

Alpha Rotator command:

p (gets rotor position) blue led flashes on CP2102
 
 
Rotctl is used for test and setup. Rotctld (daemon that uses tcpip comunications) is for regular use. It can send rotator information to Gpredict
 
 
 
 

See IP-step1 diagram below.

a) RPI: Disable wireless: sudo ifconfig wlan0 down (temporary). Use sudo nano to check /etc/dhcpcd.conf to make sure static ip addresses are #‘ed out. Ie the RPI is on dhcp.

b) On the Win7 laptop disable Wireless adaptor 1. The ethernet adaptor2 should be set to DHCP.

c) smartphone not yet connected

 

See IP-step2 diagram below.

a) RPI:

b) On the Win7 Laptop when the smartphone is connected via USB a new NDIS network adaptor 3 will appear.

c) Connect smartphone USB to Laptop USB. Enable data usage. Enable tethering (via USB).

See IP-step3 diagram below.

a) RPI: When the laptop windows adaptors have finished reconfiguring themselves (takes 5mins) the RPI will take a matching dhcp address 192.168.137.x

b) On the Win7 laptop the NDIS adaptor ip4 properties should be set to shared. This then forces windows to reconfigure itself. The ethernet adaptor2 which is set to DHCP will assume the ip address 192.168.137.1

c) Smartphone is still connected to Laptop USB with data usage enabled and tethering enabled (via USB).

For Raspberry Pi with full GUI, SD1 or SD2 build, connect laptop to RPI direct via ethernet cable (it can also go through the 4 port Netgear switch).

On laptop open a cmd terminal and type arp -a , this will show the ethernet address of the laptop (which should be on 192.168.137.1) and after a few minutes the ethernet port of the RPI which will pick up a IP address from the laptop eg 192.168.137.53.

When you have the ethernet address of the RPI you can connect to it in VNC (gui).
 

 
     
     
     
     
     
     
     
     
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