Looks like the issue is related to the power supply. I just plugged a 5V to the USB and It has been working fine for 24h. Need to review the Power supply in place.

additional info: Same situation having //#define MY_DEBUG defined or not.

Hi All,
I have an ethernet gateway base on arduino Pro mini with NRF24L01 radio and Funding ethernet card with W5100 chips. (As per description of this page)
All works fine when I'm connected to it with Arduino IDE. Works for hours/days.
If I unplug the IDE (disconnect USB) and run it alone it stop working after for minutes or few hours.
I have only one sensor (temperature) to test. It send Temperature and battery level every 10s (testing). Led attached to Gateway to show the traffic lit up twice each time it receive the information from the sensor. The LED lit up twice like half a second when everything is fine. Easy to see.
When the issue starts, the led lit up time to time but very quickly, and even very difficult to see. Some time I can ping the Gateway, some time not.
Any idea from anybody ?