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I got an ESP-12Q ESP8255 module and I am trying to upload Arduino firmware on it. But I can't even get any response from the module at all. No LEDs anywhere are on, I don't even know if the thing is dead or if my wiring is wrong. I get not even a single sign this thing is alive on the serial monitor. I have tried different baud rates. I don't know if it is a faulty unit because I can't tell if it is on. Absolutely nothing.

I have wired it up as follows:

enter image description here

I have also tried using 10k resistors to connect between the GPIOs and the VCC and ground but no luck. I also tried using the Arduino UNO to act as USB to Serial (tx-tx, rx-rx) but nothing.

I am about to toss this unit in the bin because I am completely at a loss right now. Any help would be greatly appreciated.

share|improve this question
    
what baud rate are you trying to use - some (most) ESP's use 74880 - have to admit though, never heard of the ESP-12-Q – Jaromanda X Jul 11 at 12:07
    
I tried 74880 as well using Putty but nothing. Won't I atleast see gibberish if the baud rate is incorrect? – Bruno Jul 11 at 12:08
    
that's true - does the PL2303 "handle" 3.3v signals? (I've just looked up thye 12-Q, and see that it's default baud rate is a standard 115200) – Jaromanda X Jul 11 at 12:12
    
I think it does, I read somewhere that says that if it has 3.3v out then it should. I could be wrong though. – Bruno Jul 11 at 12:14
    
only one thing to suggest is to use a pullup resistor on reset (RST) - I've never had to with any of the ESP8266's I've got, but I don't have a 12Q - I take it you've confirmed the PL2303 is not faulty? – Jaromanda X Jul 11 at 12:17

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