I have problems with the ESP-chips, too. The wierd thing is is that it's working just fine the first time the device calling the DHCP-server, and recieve 10.0.0.128 - but after this moment, it's DHCPDECLINE over and over again. However the `deauthentication` is also present in our logs for the ESP-devices. Our AP's is in bridge-mode, and they have the 2.4 GHz-option (and it's enabled) for the SSID - and all ESP-chips are trying to connect to the 2.4GHz SSID. But it doesn't help. WPA1 and WPA2 vs WPA2-only is, sadly, the same story. The ESP-chips works just fine on one of our old and dump ASUS AP's - no problems at all... The devices works fine without static DHCP-mapping in pfSense (dhcpd), so temporary we manage to just use fx. SonOff's with the MQTT-protocol, but it's not an option for some of our other devices, fx. a few ESP-based smart light-bulbs.
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