ESP8266 Community Forum

So this may not be the correct place to ask this, but I can't flash my ESP8266 (ESP-01). I have 3.3v and ground connected, Rx to Tx and Tx to Rx on my usb to serial adaptor. I also have GPIO0 connected to ground too.

I am using an external power supply but the usb adaptor and power adaptor share a common ground.

I'm using a mac and esp tools to flash it, and it has worked before.
The command I am using is:

But the response is:

This make me think something is wrong with receiving data from the ESP because when attempting to connect, the ESPs blue LED flashes.

My usb to serial adaptor works fine though as i've tested it with my arduino.

GPIO2?

I've flashed it before whilst not having GPIO2 connected to anything, what should I connect it to?

Same problem with mine esp-01 1M black with serial FDTI . It's not flashing. All connection is ok, but end of the flash is giving "......................." uploading ...............bin file 0x000000 . And also I have to close with OK button. Than when I test it unground GPIO0 from GND blue led is lighting allways.