ESP8266 Community Forum

- Thu Nov 20, 2014 5:17 pm #3024

I'm a bit stupid : while searching the reset pins and expecting reboot seen in my picocom, my USB-TTL was not connected to my ESP-03, but to my ESP-01 ...
The GPIO16 is in fact the Reset !

i dont think so. gpio16 puldown like module reset pin but not reset pin. can you try gpio16 to nc and system_deep_sleep function? is module waking up or not?

ESP8266.com Moderator
Lets get the party started and +1

[url=https://www.banggood.com/custlink/KvGGhGF4wG[/url]

I like ESP8266 and ESP8285 and ESP32

- Thu Nov 20, 2014 5:43 pm #3028 According to this schematic, http://www.cnx-software.com/wp-content/uploads/2014/08/ESP8266_Schamtics.jpg, it should be connected to pin 32 thr a resistor. Also there is a jumper to short it with pin 8.
(That's proably why someone else ask me to verify the jumper's pad. I've took a picture http://www.esp8266.com/viewtopic.php?f=6&t=572#p3026 ...)
About trying the system_deep_sleep function(), sorry, I don't have much time these days ...

- Thu Nov 27, 2014 3:26 pm #3409 I have got a few ESP-03 modules from eBay, they came with AT firmware. Interestingly, there is first some bootloader output sent at ~75000 baud

Code: Select all ets Jan  8 2013,rst cause:1, boot mode:(3,6)

load 0x40100000, len 25052, room 16
tail 12
chksum 0x0b
ho 0 tail 12 room 4
load 0x3ffe8000, len 3312, room 12
tail 4
chksum 0x53
load 0x3ffe8cf0, len 6576, room 4
tail 12
chksum 0x0d
csum 0x0d


and then vendor and version information at 9600 baud

Code: Select all[Vendor:www.ai-thinker.com Version:0.9.2.4]

ready


firmware version

Code: Select allAT+GMR
0018000902-AI03


The module works with CH_PD connected to high (VCC) and GPIO15 to low (GND). Just in case anyone finds that interesting

- Sun Dec 07, 2014 2:56 pm #4209 Does anyone tried pulling gpio pin 16 low? Did it work as a rst? If that the case then we can make a breakout board that will connect to rst pin and gpio pin directly to the Serial programmer. Then we dont have to worry about pulling gpio pin 0 low all the time and unpluging and pluging back in all the time.