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I also found on this issues as QGroundControl won't resume on connection after manual plug in batter power back to wifi module. But my nvr or vrx will resume video...

If you want to refresh the token, call this service to allow clients to register/refresh their instance in your database from frontend if (navigator && navigator.serviceWorker) { navigator.serviceWorker.register(url + "sw.js").then(register...

More info can be found on "https://developers.google.com/instance-id/reference/server" After you have create new token from failed test of invalid token, stored it into your database for ready to sent out on...

Table Structure DeviceIds(Table) - For Valid token to Target Client Send Id | Name | Token TokenCredentials - Token Credential help you to refresh token and create a new once...