ESP-12 setup sporadicly working "Ai-Thinker invalid"
Posted: Sat Apr 18, 2015 7:27 amI am playing around with an ESP8266-12, but have some issues getting it to work properly i.e.
1) basic hardware setup for flashing and operation (I believe I got this covered, though I am not sure, since the different guides/tutorials are always a little different)
2) AT commands for the factory firmware not always returning a response or "invalid"
3) error after loading NodeMCU (0.9.5_20150318), MEM CHECK FAIL!!! Fatal exception (0):
I believe the hardware setup is finally correct, but I have some problems getting some proper AT response though. I ended up connecting it like this diagram in this post viewtopic.php?f=13&t=1672#p10027. At baud rate 115200 I was able to get the best response, but most of the time it would return Ai-Thinker followed by "invalid", at other baud rates it returned gibberish. Then suddenly it worked, I would get proper response, I could find connect to the AP from my phone and computer, but after a reboot it did not work again.
I decided to load the latest NodeMCU. It successfully uploaded the firmware but after reboot it it replies
I am most likely doing something very wrong, since I am totally new to ESP8266, but cannot pinpoint where I am failing.
My current hardware setup consists of:
Edit
I got this one to work AI-v0.9.5.0 AT Firmware.bin powered from the PL2303HX USB to TTL at 9600.
https://drive.google.com/folderview?id= ... JmNU0#list
But still no luck with NodeMCU.
1) basic hardware setup for flashing and operation (I believe I got this covered, though I am not sure, since the different guides/tutorials are always a little different)
2) AT commands for the factory firmware not always returning a response or "invalid"
3) error after loading NodeMCU (0.9.5_20150318), MEM CHECK FAIL!!! Fatal exception (0):
I believe the hardware setup is finally correct, but I have some problems getting some proper AT response though. I ended up connecting it like this diagram in this post viewtopic.php?f=13&t=1672#p10027. At baud rate 115200 I was able to get the best response, but most of the time it would return Ai-Thinker followed by "invalid", at other baud rates it returned gibberish. Then suddenly it worked, I would get proper response, I could find connect to the AP from my phone and computer, but after a reboot it did not work again.
I decided to load the latest NodeMCU. It successfully uploaded the firmware but after reboot it it replies
Code: Select all
MEM CHECK FAIL!!!
Fatal exception (0):
epc1=0x4022169b, epc2=0x00000000, epc3=0x00000000, excvaddr=0x00000000, depc=0x00000000
Fatal exception (0):
epc1=0x4021086e, epc2=0x00000000, epc3=0x00000000, excvaddr=0x00000000, depc=0x00000000
Fatal exception (0):
...
...
And many more linesI am most likely doing something very wrong, since I am totally new to ESP8266, but cannot pinpoint where I am failing.
My current hardware setup consists of:
- OS X and Windows 8.1
- PL2303HX USB to TTL http://www.dx.com/p/pl2303hx-usb-to-ttl ... TJJmc4azT0
- USB2.0 To TTL 6Pin CH340G http://www.aliexpress.com/item/USB2-0-T ... 47221.html
- ESP8266-12 (+ another -12 and -07 I will test out later when I get a better breakout board)
- External power supply (1A, 3.3V) or from the USB to TTL module, had the best result with powering from the USB to TTL module
- Arduino 1.6.3 for serial communication
Edit
I got this one to work AI-v0.9.5.0 AT Firmware.bin powered from the PL2303HX USB to TTL at 9600.
https://drive.google.com/folderview?id= ... JmNU0#list
But still no luck with NodeMCU.
