Does not execute any commands

[DioneLago]

Hey guys! I'm having the following TIMEOUT problem, return "No response in 3s". I can open the door without problems but any command I try to send returns TIMEOUT, can you help me?

[kybarg]

@DioneLago what device are you uisng it with?

[DioneLago]

Hi Ruslan, is a SCR Advance (SCNR8) this https://www.cranepi.com/en/products/payment-technology/note/recyclers/scr-advance Best regards, Dione Lago.

[kybarg]

@DioneLago Have you tried refactor branch?

[DioneLago]

Hi @kybarg ,
I tried with the refactor branch but it doesn't work, it doesn't receive anything in the sendToDevice function with the try catch.

[DioneLago]

This is logs by try with function sendToDevice, is a buffer in hex, command, ACK and time
after 20 retries this return a error of timeout.

[DioneLago]

I believe the problem occurs here https://github.com/kybarg/ebds/blob/refactor/lib/index.js#L135 because after this line the console log does not print, but I don't know why, I already checked the port and in this case /dev/ttyUSB0 is correct

[kybarg]

@DioneLago if you try to prpint out buffer here https://github.com/kybarg/ebds/blob/refactor/lib/index.js#L66
is there any output?
Also not sure about device path on Linux. I suppouse uare using Ubuntu

[DioneLago]

Hi @kybarg, no any output in this line.
Yeah, this is run on Linux Ubuntu 22.04 and i run command dmesg to list a devices and /dev/ttyUSB0 listed and appoint to MEI Cashflow SC, i try with another port /dev/ttyS0 for example but not return data.

A model of MEI Cashflow is SCNR3828.

I verified to drivers for USB-serial virtual for Linux, and discover this is native on kernel of Linux. Not necessary to install anything.

I have have try commands to permitions:
$ chmod 777 /dev/ttyUSB0
$ chmod -R 777 /sys/bus/usb/devices
$ usermod -a -G dialout $USER
$ usermod -a -G plugdev $USER
$ usermod -a -G tty $USER

I observed green light is blinking every 3 seconds, in docs of MEI this is a problem with interface comunication. Maybe necessary to update of firmware.
https://www.silabs.com/developers/usb-to-uart-bridge-vcp-drivers?tab=downloads