Use this forum to chat about hardware specific topics for the ESP8266 (peripherals, memory, clocks, JTAG, programming)

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By Gian Carlo Salvati
#19919 Dears,

I tried to put to work my ESP-09 but nothing happens.
No AT commands output, no firmware flash working.

I used the pinout on the seller and postted here on this forum.

What shoud I do?

Thanks
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By Mirza Ceyzar
#21887 I have a similar issue.
I bought 50 x ESP-07 and had the crystal mounted 90 degrees off issue.
bought another 20 units that the seller promised good, and was OK.

Now I got 50 x ESP-09 and tried 2 units both are not working. I hope not to have 100 units in the rubbish bin.

The first unit I connected

antenna -> antenna
vcc -> 3.3v
ch_pd -> 3.3v
rst -> 3.3v
GPIO02 -> 3.3v
gnd -> gnd
GPIO15 -> gnd
GPIO00 -> gnd
tx_esp -> rx_cp2012
rx_esp -> tx_cp2012

Second unit I connected

antenna -> antenna
vcc -> 3.3v
ch_pd -> 3.3v
rst -> 3.3v
gnd -> gnd
tx_esp -> rx_cp2012
rx_esp -> tx_cp2012

Both tried BAUD rate 9600, 14400, 2880, 57600, 100000, 115200, 125000, 150000, 250000.
All return Gibberish...
Consistent gibberish though on both units. Looks like a symptom of wrong BAUD rate.

Does anyone actually get one working ?