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I have set up my Raspberry Pi as Access Point. Working! I have my wlan0 as access point. Working! I have my eth0 as connection to my Homenetwork (connection to the internet). Working!

Now to my question,

I have an ESP 8266 which I have already connected successfully to my Raspberry Pi wlan0. (Serial output of ESP 8266 shows an IP in the wlan0 range!

But I can't connect to Webserver on ESP ... I tried an Portscan: Portscan in Raspberry Pi Wifi -> No Port open. Portscan in my Homenetwork (changed the credentials in ESP->main.c) -> Port is open!

I tried to Ping my ESP8266 -> Ping is working within Raspberry Pi Access Point!

So does anyone has an idea, why port 80 is blocked within raspberry pi wifi Access Point?

Thanks!

nikomax
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  • After reading your question I am not sure from where exactly you are trying to connect to ESP. Are you attempting TCP connection from within Pi to port 80 of ESP IP? – Slimak May 19 '20 at 15:28
  • Yes, I want to connect from the Raspberry Pi directly to the ESP IP to port 80. – nikomax May 19 '20 at 15:40
  • Have you tried connecting to something else than ESP and connected to WiFi? Have you tried logging IP traffic from inside Pi (tcpdump/iptables rules to log packets/...) to confirm stage/place where the packet is dropped/lost? – Slimak May 19 '20 at 16:02
  • I found the error! While connecting from the ESP to the wifi Network i had to set my WiFi mode: —> WiFi.mode(WIFI_STA); // was missing WiFi.begin(ssid, password) – nikomax May 20 '20 at 11:32

1 Answers1

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I found the error! While connecting from the ESP to the wifi Network i had to set my 

WiFi.mode(WIFI_STA); // this line was missing in main.c of Esp
WiFi.begin(ssid, password)

Thanks.

nikomax
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