ESP8266 Community Forum

- Sun Feb 22, 2015 11:12 am #10415

Yes, I only connect the GPIO0 when I want to flash the module

Just asking, your connections seem sensible

Don't know these modules, BTW.

Another attempt : On the picture I see 3 GND pins, did you connect all 3 pins to GND, or could you verify that these pins are connected on the PCB?

I checked all these GND pins with a multimeter and there are connected among them.

Yesterday, I was using a few resistors and a capacitor with this module such as the ESP-12, but I didn't have success...
I asked Espressif and other users about these modules on Twitter, and I didn't have any response from Espressif... other users have the same troubles. What a mystery!

I appreciate your help

- Sun Feb 22, 2015 12:21 pm #10422

I appreciate your help

You're welcome, last attempt:
- did you try pull-up resistor on GPIO0/GPIO2/RST to Vcc and GPIO15 to GND
- did you use a "good" power source (3.3V >150mA), NOT from an USB-Serial adapter?
- did you use an electrolytic capacitor across Vcc and GND, near the module
- did you try several baud rates on your serial terminal?

Perhaps you already tried all this, but you never know!

Not very nice from Espressif to handout complimentory modules to clients and then provide NO support. There seem to be some Espressif employee's lurking about on the forum, perhaps they read our "disappointment" and come to the rescue.

Best of luck!

- Sun Feb 22, 2015 3:12 pm #10438

I appreciate your help

You're welcome, last attempt:
- did you try pull-up resistor on GPIO0/GPIO2/RST to Vcc and GPIO15 to GND
- did you use a "good" power source (3.3V >150mA), NOT from an USB-Serial adapter?
- did you use an electrolytic capacitor across Vcc and GND, near the module
- did you try several baud rates on your serial terminal?

Perhaps you already tried all this, but you never know!

Not very nice from Espressif to handout complimentory modules to clients and then provide NO support. There seem to be some Espressif employee's lurking about on the forum, perhaps they read our "disappointment" and come to the rescue.

Best of luck!

I will try each point again to role out problems
Espressif sent me these modules for free, then I don't have complains hahaha

- Wed May 13, 2015 4:33 am #17299 Maybe the attached Datasheet can help ..

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