ESP8266 Community Forum

- Wed Dec 16, 2015 3:26 am #36560 Hi!

I have a few HUZZAH ESP8266 modules that run just fine when there is no electrical interference around.
I run a simple sketch that connect to a TCP-server and I can send data between the ESP and my server. I have also taken extra care of WiFi-reconnects and WDT in the sketch.

My problem is that when I use a small breadboard, just big enough for the HUZZAH, the ESP is stable even when I have interference from turning on/off fluorescent lights.

But if I use a bigger board I get reboots when turning on/off fluorescent lights in the room.

I power the HUZZAH from an iPad charger (5V/2A) and I have also tested other power sources and adding capacitors.
If using a battery (or USB power from computer) I do not have any problems.
If I use a battery (9V) on the BAT pin of the HUZZAH and 5V from the iPad charger to the Vin I still get reboots. The HUZZAH is suppose to run from the source that is greater so I guess it is run from the battery in this case but interference finds its way in to the module from the charger any way.

Picking up a NodeMCU v1.0 today to see if it behaves better.

Anyone else having this problem and have solved it somehow?

Best regards, L

- Wed Dec 16, 2015 3:17 pm #36609 What capacitors did you add where?

It sounds to me like RFI entering through perhaps the ground?

A bigger breadboard is a bigger antenna array, basically.