For a month my heating-management project was running extremely stable on a an Arduino Mega + ethernet shield.
My Blynk app runs on One+ Android.
The history graphs and the commands worked without loss of data and quickly.
But since 24th of may, all graphs and buttoms are dead on my One+.
I tried to get connected with an refreshed “auth. token” : no change.
I tried the most simple program (1 buttom - one led): this worked for a while, but not stable (alternatively variable number of seconds access / no access to the cloud).
I tried this simple tests with new project under the same account, but also under a brand new account : same bad result
I tried external and USB power supply without any change.
I tried the USB connection (blynk-ser script) : this connection to the cloud was very stable !!!
I tried Blynk application
The laptop used for the USB tests, was connected with the same router to the internet.
To exclude hardware failure,I double checked all the (one led / one buttom) tests with 2 different Arduino Boards and two different ethernet shields. The results were identically bad. I paid attention to use different auth. codes for each ethernet shield.
internet quality recently upgrade to 200/20Mbps, (relevant ? )
``De schets gebruikt 20.900 bytes (8%) programma-opslagruimte. Maximum is 253.952 bytes.
Globale variabelen gebruiken 672 bytes (8%) van het dynamisch geheugen. Resteren 7.520 bytes voor lokale variabelen. Maximum is 8.192 bytes.
= serial debug ?
I upgraded today from arduino 1.6.5 to 1.6.9 and also installed the most recent libraries .
The unstable communication however on the small "led + buttom" program has not changed.
(communication working very well for a few seconds , than not, then again etc ).
I keep getting messages on my tablet " your Arduino mega was disconnected"
seems to be OK now.
Test-program runs without problems by slowing down the loop() …with a delay of 100ms .
when in an arduino sketch read or write instructions come to close after each other, Arduino comes in the disconnected situation …
(only reason I see for that is the recent speed update from my internet provider)