(1) esptool.py --port /dev/ttyUSB0 erase_flash
esptool.py v2.1
Connecting....
Detecting chip type... ESP8266
Chip is ESP8266
Uploading stub...
Running stub...
Stub running...
Erasing flash (this may take a while)...
Chip erase completed successfully in 7.8s
Hard resetting...
(2) esptool.py --port /dev/ttyUSB0 --baud 460800 write_flash --flash_size=detect 0 esp8266-20171101-v1.9.3.bin
esptool.py v2.1
Connecting....
Detecting chip type... ESP8266
Chip is ESP8266
Uploading stub...
Running stub...
Stub running...
Changing baud rate to 460800
Changed.
Configuring flash size...
Auto-detected Flash size: 4MB
Flash params set to 0x0040
Compressed 600888 bytes to 392073...
Wrote 600888 bytes (392073 compressed) at 0x00000000 in 8.9 seconds (effective 542.3 kbit/s)...
Hash of data verified.
Leaving...
Hard resetting...
(3) picocom /dev/ttyUSB0 -b 115200
picocom v1.7
port is : /dev/ttyUSB0
flowcontrol : none
baudrate is : 115200
parity is : none
databits are : 8
escape is : C-a
local echo is : no
noinit is : no
noreset is : no
nolock is : no
send_cmd is : sz -vv
receive_cmd is : rz -vv
imap is :
omap is :
emap is : crcrlf,delbs,
Terminal ready
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I have to unplug and plug the USB back in. Resetting the device won't work. I got the following error message:
picocom v1.7
port is : /dev/ttyUSB0
flowcontrol : none
baudrate is : 115200
parity is : none
databits are : 8
escape is : C-a
local echo is : no
noinit is : no
noreset is : no
nolock is : no
send_cmd is : sz -vv
receive_cmd is : rz -vv
imap is :
omap is :
emap is : crcrlf,delbs,
FATAL: cannot open /dev/ttyUSB0: Device or resource busy
This could also be a bad usb cable. Use a good one with a data line on it.
///////////////////////////////////////////////////
///////////////////////////////////////////////////
///////////////////////////////////////////////////
Also you might need to press enter a few times to see the Python prompt:
.......
imap is :
omap is :
emap is : crcrlf,delbs,
Terminal ready
>>>
>>>
>>>
(4) Start playing around
Hookup an LED on D7 which is mapped to GPIO13.
>>> pin = machine.Pin(13, machine.Pin.OUT)
>>> pin.on()
>>> pin.off()
You can see the LED goes on and off now. Happy tinkering!
ref:
https://docs.micropython.org/en/latest/esp8266/esp8266/tutorial/intro.html
https://dev.to/kenwalger/micropython-and-the-nodemcu-esp8266
http://www.instructables.com/id/MicroPython-Basics-Using-NodeMCU-ESP8266/
https://hackaday.com/2016/07/21/micropython-on-the-esp8266-kicking-the-tires/
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