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User avatar
By Okeanos
#37891 Hey everyone,

i've bought an ESP8266 - 01 and something with my "Chip Power Down" doesn't work as I thought it will. :(
ESP8266.jpg


I uploaded a blank sketch on my arduino uno and connected it as I listed here:
ESP8266_2.jpg

Gnd->Gnd
Vcc->3.3V (using the 5V pin from the arduino and a voltage divider; 2 resistors)
TXD->RX (Pin 0)
RXD->TX (Pin 1)

Then the red LED turns on. But if I now plung in the CH_PD to 3.3V the red LED goes off. Can someone please help me. I thought the blue LED should blink one time and the red LED is on for the whole time when it is connected to power.

I'm sorry for my bad english. I would be very thankful for every tip.

Patrick
User avatar
By eduperez
#37910 Yes, the ESP is supposed to boot when the CH_PD line is held high. Considering the red LED is just wired to VCC through a resistor, my first bet is that you are not powering the device properly, and it draws so much current that the voltage drops. I guess that your voltage divider is not a proper solution.
User avatar
By lethe
#37957 You can't use a voltage divider to power things, they only work on high impedence inputs, since the high side resistor is in series with the load and its voltage drop will increase with the load current.
Use a proper voltage regulator with an output rating of at least 300mA instead.