Is there a way to upload and download files over serial without AMPY?

[jf_vt]

Hi
I design and build sensor PCB board that works over wifi
I need to test those boards before deploying them on a a wifi network and sometime tune the software for a specific board on the electronic bench and without WIFI access. I only have access to esp8266 over serial port at that time
I cannot upload/download over webrepl.

I use AMPY to load the initial software after flashing the rom and it works fine for that.

But if I want to change a thing say in main.py AMPY dont work most of the time ( it just hangs forever).
This problem is well documented as a quick google search shows.
So my question:
is there another tool I can use to put and get file on esp8266 over serial beyond AMPY?
A search over the internet did not bring anything obvious but I might be missing something.
Thanks

[jf_vt]

OK
I am sorry to have asked this question s I found its answer literally 2 min after asking it
but in case someone else stumble on the same difficulty:
rshell is doing the job and more...