ESP8266 Community Forum

- Thu Jun 25, 2015 11:05 am #21630 flash nodemcu_20150123.bin

- Sat Jul 11, 2015 10:50 pm #23037 I was trying to get it to communicate over thingspeak and I found this example;

https://thingspeak.com/channels/39259

https://sites.google.com/site/pticar/mcu/esp8266

may it help others like me

- Sun Jul 19, 2015 3:11 pm #23662 elettosilva,
I tried loading nodemcu_20150123, to no avail.
At first, the firmware loaded successfully. I then removed the GPIO0 from ground (leaving open), power cycled the ESP, and launched ESPlorer. When ESP was reset from within ESPlorer, I would get repeated reboot messages.
During other attempts, NodeMCU stops loading about 10-75% through, then gives a red icon in the lower-left corner, and a "Error:Write flash timeout." message in the log.
I've tried several different configurations of NodeMCU (baud rate, flash size, flash speed and SPI mode), and the only one that seems to work (occasionally) is 512,000 baud, 4MByte, 40MHz, DIO. And sometimes I have to start the flashing, then power cycle my ESP before it starts flashing.
Going back to my only successful load of 20150123 again, loading ESPlorer and connecting to ESP, I initially get a reasonable (single) reboot message:
"node.restart()
> c_ÇÏ"+öâFjSöf*Súfêð
Restore init data.
NodeMCU 0.9.5 build 20150123 powered by Lua 5.1.4
lua: cannot open init.lua
> "
However, when I attempt to load two lua scripts (Javier Yanez code) from ESPlorer, I'm getting an error:
"Waiting answer from ESP - Timeout reached. Send aborted." in a pop-up window.

Any thoughts?

- Wed Jul 22, 2015 7:11 am #23914

elettosilva,
I tried loading nodemcu_20150123, to no avail.
At first, the firmware loaded successfully. I then removed the GPIO0 from ground (leaving open), power cycled the ESP, and launched ESPlorer. When ESP was reset from within ESPlorer, I would get repeated reboot messages.
During other attempts, NodeMCU stops loading about 10-75% through, then gives a red icon in the lower-left corner, and a "Error:Write flash timeout." message in the log.
I've tried several different configurations of NodeMCU (baud rate, flash size, flash speed and SPI mode), and the only one that seems to work (occasionally) is 512,000 baud, 4MByte, 40MHz, DIO. And sometimes I have to start the flashing, then power cycle my ESP before it starts flashing.
Going back to my only successful load of 20150123 again, loading ESPlorer and connecting to ESP, I initially get a reasonable (single) reboot message:
"node.restart()
> c_ÇÏ"+öâFjSöf*Súfêð
Restore init data.
NodeMCU 0.9.5 build 20150123 powered by Lua 5.1.4
lua: cannot open init.lua
> "
However, when I attempt to load two lua scripts (Javier Yanez code) from ESPlorer, I'm getting an error:
"Waiting answer from ESP - Timeout reached. Send aborted." in a pop-up window.

Any thoughts?

Hi jtheires,

The ESP-01 I own have just 1MB flash. Please check if yours are really 4MB Flash. Also, baud rate normalle used is 115200.
Try 115200, 1MB, 80 MHz.

If fails, change baud rate to 57600 and later on 9600.

If still fails, review your FTDI.

If still fails, I had no more ideas than checking with another ESP-01 sample.

Good luck!