Error -304 in writeFields() | ThingSpeak API | Forum

Hi,

I am sending environmental data (float) once every 30 minutes from a NodeMCU, so the speed rate is low. Since a couple of months I am experiencing 3-5 errors a day, returning code -304 (Timeout waiting for server to respond).

I am sending data with this code (very straight-forward):

ThingSpeak.setField( 1, t );
ThingSpeak.setField( 2, h );
ThingSpeak.setField( 3, p );
ThingSpeak.setField( 4, vdd );

int writeSuccess = ThingSpeak.writeFields( myChannelNumber, myWriteAPIKey );

How can I improve communication?