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Home » Eclipse Projects » Mosquitto » MQTT no connection with ESP8266 but connect to Android(MQTT refuses connection with ESP8266 and Laptop but works with Android)
MQTT no connection with ESP8266 but connect to Android [message #1806607] Sat, 11 May 2019 17:15
Derek Belz is currently offline Derek BelzFriend
Messages: 1
Registered: May 2019
Junior Member
I have a connection problem with MQTT since I have to use ipv6 adresses.

I run Mosquitto on a raspberry with raspian jessie.It has been running nicely for over a year using ipv4 adresses.
Now I got broadband which can only adress ipv6. I have a ESP8266 that is sending data into mqtt on the raspberry while I am travelling. Since I use ipv6 it doesnt connect anymore from the outside.
If the ESP is in the home network it works. I am using a service that is giving me a domain which knows the ipv6 ip. Also if I use a mqtt client on my laptop and try to access from externally it still doesnt work.
If I use my cellphone ore tablet with the same external internetconnection then it does work.
To me this looks very strange.

Has anybody got an Idea?
Please excuse my bad english.
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