Anyone know anything about this kind of behaviour? This is weird cause sometimes it works, but usually not.
I use :NodeMCU 1.0Relays (4 channel): Power step down controller:5A XL4005 75W Power supply (12V 3A):
I played a little while with those "LED" and "CC" screws in 5V regulator. And surprise.. Its started work at some point.
And that question of yours that why I've connected both (G and VIN) and NodeMCU´s USB-port for power. As I've understood it cuts the power in from the one input you're not using.So When I connect the 5V USB-cable to NodeMCU´s USB-port, NodeMCU takes power in only from that USB-port then, at the same time forgetting those (G- and VIN-pins). And other way round. If I take the 5V USB-cable off from that NodeMCU, it starts to take power in from those (G- and VIN-pins).So those are not feeding power from two different places at the same time.. Its the pins or the connected USB-cable overrides those pins.
Have you explained - and I cannot see where - what voltage you actually measure on the 5 V supply?