Hi, Did you check whether your WiPy is connected to wifi? If WiPy is not connected to wifi, you can receive oserror. After being sure that your WiPy connected to wifi, please try your code. Best,

@seb Everything work fine, after sync again! Thank you very much

@livius Thanks for your help, the gc.collect() has worked and the loop has remained stable for a few hours now.

@RobTuDelft Try closing the socket after each request you make as @this-wiederkehr suggested here. It worked for me.

@wolli01 Hier mein Code import urequests userdata = {"p1": "Wohnzimmer", "p2": "24.12.2018", "p3": "23.97"} url = 'https://Homepage.de/live1.php' res = urequests.post(url, headers={"Content-Type": "application/json", "Accept": "application/json"}, data= str(userdata)) res.close() auf den PHP Server: <?php //Sensor1 $p1 = $_GET["p1"]; $p2 = $_GET["p2"]; $p3 = $_GET["p3"]; $inhalt = array($p1, $p2, $p3); // Speichern der Datei $eintrag = implode(";", $inhalt); file_put_contents("sensor1.txt", $eintrag); ?>