How to use wifi esp_at with ESP8285 ?

[moonlight83340]

I have an STM32 F429zi and a grove uart wifi V2(ESP8285) wifi module on my uart6.
I upgrade to the last firmware 2.2.1 my wifi module, but I have weird problem.
I try with net/wifi/shell sample.

I'm able to connect to my wifi but I can't ping any IP. I'm able to ping my STM32 device from my others PC(windows,ubuntu).
Is there a configuration or somehow I don't understand ? How can I check my wifi module is working ?

With wifi status I get :

uart:~$ wifi status
Status: successful
==================
State: COMPLETED
Interface Mode: STATION
Link Mode: UNKNOWN
SSID: 5C6199E310A7-2G
BSSID: 5C:61:99:E3:10:A8
Band: 2.4GHz
Channel: 6
Security:  UNKNOWN
MFP: UNKNOWN
RSSI: -36
Beacon Interval: 0
DTIM: 0
TWT: Not supported
Current PHY TX rate (Mbps) : 0

And with net iface I get :

uart:~$ net iface
Interface wlan0 (0x20000d70) (IP Offload) [1]
=====================================
Link addr : 9C:9C:1F:92:D6:10
MTU       : 2048
Flags     : AUTO_START,IPv4
Device    : wifi (0x80246b8)
IPv4 unicast addresses (max 1):
        192.168.3.100/255.255.255.0 DHCP preferred infinite
IPv4 multicast addresses (max 2):
        224.0.0.1
IPv4 gateway : 192.168.3.1
DHCPv4 lease time : 0
DHCPv4 renew time : 0
DHCPv4 server     : 0.0.0.0
DHCPv4 requested  : 0.0.0.0
DHCPv4 state      : disabled
DHCPv4 attempts   : 0
Interface eth0 (0x20000e98) (Ethernet) [2]
===================================
Interface is down.
uart:~$

When I try net ping :

uart:~$ net ping 192.168.3.4
PING 192.168.3.4
Failed to send ping,uart:~$

And my ping from ubuntu PC :

~/zephyrproject/zephyr$  ping 192.168.3.100
PING 192.168.3.100 (192.168.3.100) 56(84) bytes of data.
64 bytes from 192.168.3.100: icmp_seq=1 ttl=255 time=53.3 ms
64 bytes from 192.168.3.100: icmp_seq=2 ttl=255 time=72.2 ms
64 bytes from 192.168.3.100: icmp_seq=3 ttl=255 time=95.4 ms
64 bytes from 192.168.3.100: icmp_seq=4 ttl=255 time=15.4 ms
64 bytes from 192.168.3.100: icmp_seq=5 ttl=255 time=38.4 ms
64 bytes from 192.168.3.100: icmp_seq=6 ttl=255 time=60.7 ms
64 bytes from 192.168.3.100: icmp_seq=7 ttl=255 time=83.4 ms
64 bytes from 192.168.3.100: icmp_seq=8 ttl=255 time=107 ms
64 bytes from 192.168.3.100: icmp_seq=9 ttl=255 time=26.1 ms
^C
--- 192.168.3.100 ping statistics ---
9 packets transmitted, 9 received, 0% packet loss, time 8010ms
rtt min/avg/max/mdev = 15.423/61.338/107.132/29.439 ms
~/zephyrproject/zephyr$ 

If you need more informations, tell me.

[moonlight83340]

I use the esp_at driver, it seems that because it's an offloaded driver it doesn't handle ICMP packets.