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ESP-03 doesn't respond

PostPosted: Thu Apr 28, 2016 5:28 am
by Def
Hi

I'm using sucessfully ESP-01 and ESP-12 but i didn't managed to run ESP -03 model. My wiring:
GPIO15 - pull down (10k)
GPIO0 - pull down (10k)
GPIO2 - pull up (10k)
CH_PD - pull up (2,2k)
100nF cap between VCC and GND
Power goes though USB-UART CP2102 adapter, I also used 1A 3,3V power supply, no luck.




I get this bootloader errors (74880 baudrate): http://pastebin.com/AJkrKWh5 and after those errors at 115200 baudrate:

Ai-Thinker Technology Co. Ltd.

ready


It doesn't respond to AT commands, nor flashnig new firmware. Year ago i also coulndn't run it :P I gave up and moved to esp-12. Now i need the smallest board, so I'm trying to run this thing again. Is there anyone who managed to get this working? This is the 2nd board I'm trying to run.

Re: ESP-03 doesn't respond

PostPosted: Thu Apr 28, 2016 7:56 am
by martinayotte
Def wrote:GPIO0 - pull down (10k)


GPIO0 should be HIGH for normal Execution mode, when LOW, it is going into Flash Upload mode.

Re: ESP-03 doesn't respond

PostPosted: Thu Apr 28, 2016 8:17 am
by Def
This is a new chip, I just plugged it in. The problem is I want to flash my esp with new firmware or jus upload simple sktech from arduino/eclipse but I can't communicate with it. So I suppose GPIO0 should be low. Since there is no code to execute, in boot from flash mode it floods me with fatal exceptions

Code: Select allFatal exception (28):
epc1=0x40001800, epc2=0x00000000, epc3=0x00000000, excvaddr=0x00007ff0, depc=0x00000000