ESP8266 Community Forum

Posted: **Tue May 19, 2020 1:06 pm**

i bought 4 esp8266(esp-12E) from
https://de.aliexpress.com/item/32665100 ... 4c4dZ2r8g9
yesterday i connected one of them to my computer with an ftdi and i could write to it with the arduino ide no problem but within 8 hours of trying i could only get it to run 2-3 times.
Most of the time i just get the following output and then nothing

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19:40:45.463 ->  ets Jan  8 2013,rst cause:1, boot mode:(3,6)
19:40:45.463 -> 
19:40:45.463 -> load 0x4010f000, len 3456, room 16 
19:40:45.463 -> tail 0
19:40:45.463 -> chksum 0x84
19:40:45.463 -> csum 0x84
19:40:45.463 -> va5432625
19:40:45.463 -> ~ld

but sometimes with some code i would also get this sort of thing

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19:39:16.860 -> Fatal exception (0): 
19:39:16.860 -> epc1=0x40100007, epc2=0x00000000, epc3=0x00000000, excvaddr=0x00000000, depc=0x00000000

a picture of my arduino ide configuration

i have probably tried out most of the available configurations by now

my hardware setup

ive read a couple times that these things can happen if there is not enough power so the dc in on the power board is 12V 2A and i put that huge capacitor in for good measure

also i just tried a second chip to see if i just got a broken one but it seems to be doing the same thing but on this one i checked what it outputs before i flash it so heres that

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18:28:44.449 -> 
18:28:44.449 ->  ets Jan  8 2013,rst cause:2, boot mode:(3,7)
18:28:44.449 -> 
18:28:44.449 -> load 0x40100000, len 2408, room 16 
18:28:44.515 -> tail 8
18:28:44.515 -> chksum 0xe5
18:28:44.515 -> load 0x3ffe8000, len 776, room 0 
18:28:44.515 -> tail 8
18:28:44.515 -> chksum 0x84
18:28:44.515 -> load 0x3ffe8310, len 632, room 0 
18:28:44.515 -> tail 8
18:28:44.515 -> chksum 0xd8
18:28:44.515 -> csum 0xd8
18:28:44.515 -> 
18:28:44.515 -> 2nd boot version : 1.6
18:28:44.515 ->   SPI Speed      : 40MHz
18:28:44.515 ->   SPI Mode       : QIO
18:28:44.515 ->   SPI Flash Size & Map: 32Mbit(512KB+512KB)
18:28:44.515 -> jump to run user1 @ 1000
18:28:44.515 ->

im sorry if there is anything missing that i should have put here im new to this also sorry if its a really obvious mistake and im wasting your time.

PS: this is just out of curiosity but what does the second number in "boot mode (3,6)" stand for i know the 3 is boot from flash can anyone tell me what the second number is

Posted: **Wed May 20, 2020 4:49 am**

what does the second number in "boot mode (3,6)" stand for

Have a look at this thread:- https://www.esp8266.com/viewtopic.php?f=6&t=8386

Posted: **Thu May 21, 2020 8:11 am**

In your picture it doesn't look like the ground connection for the ESP12E is present.

Take the smaller capacitor (left one in the picture. And connect it across the Vcc and Gnd of the ESP12. Make the connections as short as possible.

Posted: **Wed May 27, 2020 8:19 pm**

rudy wrote:In your picture it doesn't look like the ground connection for the ESP12E is present.

Take the smaller capacitor (left one in the picture. And connect it across the Vcc and Gnd of the ESP12. Make the connections as short as possible.

Ground is connecte with a little gray cabel not that easy to see(and i dont think the upload would work if it was not). i will try to put the capacitor closer to vcc and ground but should that really make a difference?

Anyway thanks for taking the time to answer i will let you know if it worked

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