I have a RPI local server and I connect my hardware to it. the version of the server is: server-0.39.4-java8.jar
in my test example I have this code:
#define BLYNK_PRINT Serial
// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth = “XXXXXX”;
// Your WiFi credentials.
// Set password to “” for open networks.
char ssid = “XXXX”;
char pass = “XXXX”;
// Debug console
//Blynk.begin(auth, ssid, pass);
Blynk.begin(auth, ssid, pass, IPAddress(X,X,X,X), 8080);
and also when I run this code I get this error in the blynk.log file of the server:
17:24:18.273 ERROR- Error sending push. Reason fcm.googleapis.com: unknown error
17:24:23.270 ERROR- Error sending push. Reason fcm.googleapis.com
Version of the Blynk App on my phone: 2.26.7
Android version :8.0.0
Forgot to say that I made a test project in the blynk cloud and the notifications worked correctly… so its probably server-sided problem…
problem solved it was an nameserver problem…