ESP8266 Community Forum

- Sat Nov 12, 2016 5:45 am #58022 Hi,

I'm doing a project which involves running the ESP as an access point, connecting a PC to that access point, and making a socket from the PC to the ESP.

Very much abbreviated, I do this:

Code: Select all    WiFi.softAP(CONFIG_SSID, CONFIG_PSK);
    WiFiServer wifiServer = new WiFiServer(1234);
    wifiServer->begin();
    while (! wifiServer->hasClient()) { delay(10); }
    WiFiClient wifiClient = new WiFiClient(wifiServer->available());
    // ...some more stuff involving reading from and writing to wifiClient...


When I run this, the access point appears, my PC can connect to it, and I can make the socket connection to it from my PC (Linux) on port 1234 using something like

Code: Select allnetcat 192.168.4.1 1234

but the connection drops about a second later, every time. If I'm quick I can transfer data in and out, proving that the connection works.

If, instead of doing

Code: Select allWiFi.softAP

I do

Code: Select allWiFi.mode(WIFI_STA); WiFi.begin("myHomeSsid", "password");

then the ESP connects to my home WiFi, I can make the socket connection to it, AND it is reliable - stays up for as long as I've tested it.

Should what I'm doing work, or have I misunderstood something? I am relying on the small amount of documentation in the source and header files to understand how to use this, as I haven't been able to find an example which does this sort of thing - they mostly seem to use the ESP in AP mode, and/or run HTTP servers which is more complex than I want/need - but if there is more extensive documentation and/or an example I haven't found, i'd be glad to see it.

Thanks!
-Mark

- Sun Nov 13, 2016 4:29 am #58067 After quite a bit of hackery and searching I found a solution here: put

Code: Select allWiFi.disconnect(true);

before all the other WiFi stuff. Works perfectly now.

BUUUUG!