ESP8266 Community Forum

Hi there.
I just successfully flashed my ESP-01 with using Now I want to send AT commands.

After flashing, I unpowered, removed connection to GPIO0, and repowered.

I tried and it takes me to a blank terminal. I try to type, and nothing shows up. I tried baud rates of and , but neither of those worked either. On all three baud rates, when I cycle power, I get some jibberish question mark things in the terminal.

Anyone have an idea of what my problem might be?

When the chip fires up it shoots out some stuff on 75800 baud or thereabouts . Then it switches to another baud rate which on my modules is 115200. Thats probably what you are seeing . Change to 75800 and have a look . It might be continually resetting.

Thanks for the suggestion. I tried that baud rate, and lots of others. They're all yielding the same results.

[code]�<Վ���8�
���8����<Y����<��
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[/code]

To confirm, I'm using a USB-TTy cable. I have the following connections:

USB GND -> GND
USB RX -> ESP TX
USB TX -> ESP RX
+3.3V -> ESP VCC
GND -> ESP GND
+3.3V -> ESP CH_PD

I've also tried connecting ESP RESET to +3.3V (HIGH).

Any other suggestions?

I'm not familiar with a "USB-TTy" Is that the same as an FTDI cable?Mine was putting out 4.76 Volts I found so I should have had a 3.3V one . Used a couple of diodes in series to drop it .

Your connections look right but I'll stick my note on the ESP12 in here just in case . When you flash GPIO0 is kept low and when running High or floating but I notice mine keeps running after loading until a reset occurs.

Actually someone else quoted that frequency as 74800 or so . try that then you might have to look it up for the right one . I'll come back and edit it when I can. User cal says

The boot code uses 74880/115200 until the firmware sets otherwis...