ESP8266 Community Forum

- Sat Dec 01, 2018 4:29 am #79355 Hi,
I have an ESP8266-01 and a USB development board for ESP8266-01. I uploaded Blink example code to and it blinks just fine with any USB port in my house. However, same thing won't happen when I wire my Arduino's 3V3 and GND pins to VCC and GND pins of ESP8266-01. I also tried wiring GND to GPIO0 too AND 3V3 to CH_PD too but no luck.

I just want it to run with Arduino's power just like it is working with power of my USB adapter. How can I resolve this?

Thanks in advance very much !

- Mon Dec 03, 2018 5:29 am #79381 the 3.3V regulator on your Arduino Board is much too weak to operate the ESP-01.
You might have some success soldering a 470µF/6V3 capacitor to the gnd/vdd pins of your ESP-01, but this is just a "work around". CHPD has to be pulled high anyways. For running your sketch, gpio0/2 should be pulled high during boot. 4k7 .. 10k pull up to vdd on all three plus one on rst as best practise.