ESP8266 Community Forum

- Thu Mar 24, 2016 7:59 am #43937 Hi, I just received my first ESP and wired it up in the breadboard. I've followed the recommended wire scheme that I found in this forum:

GPIO0 - pulled high with a 10k resistor and a push button to ground
GPIO2 - pulled high with a 10k resistor
EN - pulled high with a 10k resistor
RST - using a push button to ground
GPIO15 - ground with a 10k resistor
USB/TTL ground - to breadboard negative
GND - to breadboard negative
VCC - to 3.35v provided by a LM371 based circuit (up to 1A)
TX - to USB/TTL RX
RX - to USB/TTL TX

I'm using ESPlorer using 115200 baud (RTS and DTR off) and after on the circuit I saw this output:

Code: Select allPORT OPEN 115200

Communication with MCU...
..Got answer! AutoDetect firmware...

Can't autodetect firmware, because proper answer not received.
lnn���bp��lrlrlp�n��lbn�|l�l��b��nn�

I tried to push the reset button several times and then I received this output:

Code: Select allFatal exception (0):
epc1=0x402012e8, epc2=0x00000000, epc3=0x00000000, excvaddr=0x00000000, depc=0x00000000

 ets Jan  8 2013,rst cause:2, boot mode:(3,6)

load 0x40100000, len 1396, room 16
tail 4
chksum 0x89
load 0x3ffe8000, len 776, room 4
tail 4
chksum 0xe8
load 0x3ffe8308, len 540, room 4
tail 8
chksum 0xc0
csum 0xc0

2nd boot version : 1.4(b1)
  SPI Speed      : 40MHz
  SPI Mode       : DIO
  SPI Flash Size & Map: 8Mbit(512KB+512KB)
jump to run user1 @ 1000

�n't use rtc mem data


I can't receive any AT command answer...
I'm a bit lost now... could someone please give some help ?
thanks,
Chris

- Thu Apr 07, 2016 4:23 pm #45072 well, finally I discovered what happened...

Before I started to play with ESP8266 I've build a variable power regulator using LM317 and a potentiometer that was given me 3.3v properly measured.
What I didn't know was that this CI requires a difference between input and output voltage of at least 2V in order to give me a decent current...
and I was using my smartphone's 5v charger initially... :/

then after I have tried a 9v charger the ESP8266 have started nicely.