Wemos D1 R2 installing Micropython

[lmfcruz61]

Hello,
I have a Wemos D1 R2 board. With esptool i erased the buit in firmware and try to install the new one :
esptool.py --port /dev/ttyUSB0 --baud 115200 write_flash --flash_size=4m 0 esp8266-20170108-v1.8.7.bin

After installation the builtin led don't stop flashing . The screen in MAC appears with some not readable chars and a command prompt REPL don't appears.
No wi-fi start also.
Some solution for that?
How to Install micropython on this board?

Thanks
Luis

[Roberthh]

The flash size is Bits. so you have to write:
esptool.py --port /dev/ttyUSB0 --baud 115200 write_flash --flash_size=32m 0 esp8266-20170108-v1.8.7.bin

[lmfcruz61]

Hi Roberthh, thnaks for the answer.
I am far from my desk until today evening, going to test it later. will give you some news.
regards

Luis

[lmfcruz61]

Well still not working. The led is not flashing anymore but can't get a command prompt on the screen.
The screen is white or when press reset button is with unreadable chars.

[lmfcruz61]

working fine now. just made some ctrl-c and prompt appears.
Thanks for all

[Roberthh]

Very good. After reset the device first sends debug messages at a speed of 74600 baud (or so). Since the terminal is set at 115200 baud, this looks like rubbish.