ESP8266 Community Forum

- Tue Feb 10, 2015 6:46 am #9384 Hello everyone:

I'm trying to make a ESP-03 module to work but something is not working as expected.

This is my wiring:
CH_PD -> VCC
GPIO15 -> GND
TX,RX -> RX,TX on FTDI232

I'm powering up using a 9 volt battery and a LD33CV regulator.

When I try to communicate with the module I just receive gibberish no matter the baudrate I select. If I send commands I just receive the command I sent (echo). But it seems that the module is somehow working since I can see a new open AP in the air called "AI-THINKER_9C0E4F". I can connect to it and it will reply pings to 192.168.4.1 but no open ports.

If I set GPIO0 to GND I receive less gibberish and no AP in the air. Esptool refuses to connect.

I tried GPIO2 to VCC with no changes.
Tried GPIO16 to GND for a second (to reset?) but doesn't seem to reset the module.

Any advice? This is driving me nuts!

Thanks in advance

- Tue Feb 10, 2015 8:31 am #9390 CH_PD -> VCC
GPIO15 -> GND
TX,RX -> RX,TX on FTDI232
FTDI232 GND->esp03 GND
LD33CV GND-> FTDI232 GND
GPIO0 ->GND(for upload firmware)->VCC (for normal work)
GPIO2->VCC(for upload firmware)->VCC or NC (for normal work)

for resetting
GPIO16 to GND (for this you must to connect red rounded area in picture with 0 ohm resistor or direct solder.)

Attachments

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- Tue Feb 10, 2015 9:41 am #9394 My goodness, I think this is the most detailed info I've found so far. Thank you very much! I will test it in a few hours when arrive at home.

Also I've found about the reset thing and the bridging you told me. If I'm not wrong this will also enable the deep sleep option? If so, why is that bridge opened? It doesn't make sense (to me)

Thanks again!

- Tue Feb 10, 2015 9:50 am #9396 If it's open, you can use GPIO16 just like normal GPIO.