ESP DIGI-VIEW 4 System Uživatelský manuál stáhnout pdf (Strana 14)

6.6. Use common Linux commands

After Linux starts successfully, a basic shell is available in the Serial Console. Try entering some Linux

commands. To list files, use the ls command. To navigate through directories, use the cd command.

6.7. Check network connectivity

For development, it is important that the hardware target platform is able to communicate through the

network with the host computer.

6.7.1. Finding the IP address of the target

If the target is configured to obtain its IP address through DHCP, use this command to find the assigned IP

address:

# ifconfig eth0

Or, if the target platform has a wireless interface and no wired Ethernet, use this command:

# ifconfig wlan0

6.7.2. Ping the IP address of the host computer

To verify the network connectivity, ping the IP of the host computer and check that it responds. For

example, if the server IP is 192.168.42.1 do:

# ping 192.168.42.1

PING 192.168.42.1 (192.168.42.1) 56(84) bytes of data.

64 bytes from 192.168.42.1: icmp_seq=1 ttl=128 time=0.361 ms

64 bytes from 192.168.42.1: icmp_seq=2 ttl=128 time=0.253 ms

64 bytes from 192.168.42.1: icmp_seq=3 ttl=128 time=0.384 ms

64 bytes from 192.168.42.1: icmp_seq=4 ttl=128 time=0.255 ms

If it doesn't respond, check that both the target and host are in the same subnet. If the target is a wireless

only platform, you may need to configure it to connect to your wireless access point.

6.7.3. Configuring the wireless interface

If the hardware target platform doesn't have a wired Ethernet and it only has a wireless interface you must

correctly configure it to connect to your wireless access point.

By default, the target will try to connect to the nearest open wireless access point in range so the easiest

way to create the connection is to configure the access point to be open (no authentication or encryption).

Creating the connection to an encrypted access point requires further configuration steps using the Linux

wireless tools. Please refer to Digi ESP Online Help, accessible from menu Help > Help Contents > Digi

ESP for Embedded Linux and specifically to chapter WLAN adapter guide > Wireless connection

examples to see some examples to help you through.

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ESP DIGI-VIEW 4 System Uživatelský manuál Strana 14