I'm not sure if I'm puting this issue in the right place, so sorry in advance if I'm wrong. The thing is that I've built a row of 3W LED dimmer controllable through wifi with the HLK-rm04 module and an Atmega328 standalone. Everything is working fine, but the LEDs aren't as smooth as I wish. There is a really fast blink (almost imperceptible but annoying once you notice it) with a stable period of almost 1 second. First I thought it was a PWM frequency issue, but increasing it doesn't make any big improvement.
Accidentally I disconnected the rm04 module and realised that without it the LEDs work perfectly, no blink at all and a really smooth light. I have already tried puting a 10uF capacitor between source and ground, but still nothing.
Does anyone know how can I isolate the wifi module so it doesn't interfere with the rest of the components?