ESP8266 serial WIFI wireless module
From Federal Burro of Information
image cheat
overview
picked up 3 3.3 v versions of these. It's been fun trying to get them to work.
1. the 3.3v fdti seems to be 5v
2. the firmware seems bust:
<Crazy garbage characters> Ai-Thinker Technology Co. Ltd. invalid
then I enter:
AT+RST
and get
ERROR
going to try and find an updated firmware and flash it.
---
time passes, I enter , stage left.
I found the firware on a dodgey looking site. http://arduino-er.blogspot.ca/2015/05/flash-esp8266-firmware-using-esptoolpy.html
python esptool.py -p /dev/ttyUSB0 write_flash 0x000000 "AI-v0.9.5.0 AT Firmware.bin"
Had to make sure that ch_pd was to ground and gpio_0 was high ( vcc)
setserial -g /dev/ttyUSB0 /dev/ttyUSB0, UART: unknown, Port: 0x0000, IRQ: 0, Flags: low_latency
screen /dev/ttyUSB0
and now I get much better results:
AT OK AT+RST OK
Ok, so now I've done my flasshing , how to I get it to operate?
28800 baud , connect ch_pd to vcc ( 3.3v )
then:
<���þ���ú���ð������8:þj¤ÔHÈUÖKºÝݹ
¥µ¢¡¥¹É¹�½µ5Rj¤4Ej
U®®ZËKrÊrªB�ÅJj¤4ê«�W«��$('QY,H¦MH14, 21:50:58
ready
ATAT+RSTATAT
ERROR
AT+RST
OK
c_ÇÏR[¶fJ[:fJSjîóÂOÂGÇWËj¤ÔHÈUÖKºÝݹ
¥µ¢¡¥¹É¹�½µ5Rj¤4Ej
U®®ZËKrÊrªB�ÅJj¤4ê«�W«��$('QY,H¦MH14, 21:50:58
ready
AT
OK
AT
OK
AT+CWLAP
ERROR
AT+CWMODE
ERROR
AT+CWMODE=?
+CWMODE:(1-3)
OK
AT+CWMODE=1
OK
AT+CWLAP
+CWLAP:(3,"sashed_pirate",-75,"dc:fb:02:08:41:10",1)
+CWLAP:(4,"tuxedo",-47,"00:0e:8e:3f:ff:7a",1)
+CWLAP:(4,"ShyWhale",-87,"0c:47:3d:c6:ff:08",1)
+CWLAP:(0,"ShyWhale-guest",-89,"0c:47:3d:c6:ff:0c",1)
+CWLAP:(4,"Rogers06555",-87,"0c:47:3d:2c:32:68",1)
+CWLAP:(3,"dobber_w",-71,"00:23:69:98:06:8d",6)
+CWLAP:(3,"BELL500",-71,"44:e9:dd:46:e9:2a",6)
+CWLAP:(3,"TheGinge",-82,"6c:70:9f:ed:df:5c",6)
+CWLAP:(3,"TheBeaver",-82,"7e:70:9f:ed:df:5c",6)
+CWLAP:(3,"TheGinge",-82,"28:cf:e9:85:e5:54",6)
+CWLAP:(3,"TheBeaver",-83,"2a:cf:e9:85:e5:54",6)
+CWLAP:(3,"gopher",-48,"00:16:b6:cc:4a:51",11)
+CWLAP:(3,"1WI2U9WC",-82,"10:0d:7f:4a:10:db",11)
OK
AT+CWJAP="gopher","XXX"
OK
AT+CWJAP?
+CWJAP:"gopher"
OK
AT+CIPSTATUS
STATUS:2
OK
AT+CWJAP?
+CWJAP:"gopher"
OK
AT+CIFSR=?
OK
AT+CIFSR
+CIFSR:STAIP,"192.168.1.119"
+CIFSR:STAMAC,"18:fe:34:f3:02:92"
OK
Links
- russian site about the 0.9.5.0 firmware http://esp8266.ru/esp8266-sdk-0-9-5-v0-21/
- thread on recommended firmware: http://www.esp8266.com/viewtopic.php?f=6&t=2219 ( circa Tue Mar 31, 2015 )
- video on how to write new firmware https://www.youtube.com/watch?v=PycRnjcXMRI
- esptool for writing firmware https://github.com/themadinventor/esptool
google searches of note:
+site:hackaday.com esp firmware
- step by step firmware: http://blog.randypatterson.com/esp8266-firmware-updates-and-options/
