We have Esp8266 implemented in our products, a customer of ours reported difficulties when connecting in WPA TKIP mode, he uses a Cisco 1242 router. When changing to TKPIP + CCMP the communication works.
We work with static IP, we notice that the module is associated with the router, it receives the ARP request, the module responds to the request, but we cannot see the response.
When running wifi sniffer we see the ARP response, but the router does not understand that packet as valid data.
SDK version: 3.0.5
AP Cisco not getting ARP reply from ESP8266
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Espressif Systems is a fabless semiconductor company providing cutting-edge low power WiFi SoCs and wireless solutions for wireless communications and Internet of Things applications. ESP8266EX and ESP32 are some of our products.