FX30 Connected, losing name resolution

[jyijyi]

Before problem happens, are you able to ping the DNS server?
when problem happens, are you still able to ping the DNS server?
when problem happens, are you still able to ping 8.8.8.8?

you can try if there is improvement by disabling edrx feature by AT+CEDRXS=0

WP7702 TCP no answer after 2s

Also you can have a look here: I wonder if this is related to RRC_IDLE, also you can bring it back to RRC CONNECTED by just doing a simple TCP transfer such as keep-alive packet. In addition, you can try if there is improvement by disabling edrx feature by AT+CEDRXS=0

Will the DNS work fine after disconnecting “cm data” and connecting “cm data”?

BTW, does it work with gethostname() by using real IP address instead of host name resolution?

MQTT Connection issues on WP7702 [AWS]