I have written an application for Android which sends commands to an Arduino Wifi and an Android tablet. The 3 devices are connected into a wifi network of a internet router. This last one delivers an Ip adress to the 3 devices. Everything works correctly. From an android smartphone I can send strings to Arduino Wifi and to the Android tablet.
I would like to obtain the same result but without the internet router and use the Arduino Wifi as a dhcp server. I connect the smartphone and the tablet on the Arduino Wifi and they get an IP adress from the Arduino Wifi. From each device I can ping the Arduino Wifi. The Arduino Wifi is set to mode AP+STA.
But when I send a command from the smartphone to the tablet I get the error message : “impossible to reach this host”.
Does somebody has an idea of what is wrong ?
Thanks for your help.