Bad Response on Serial in

Am using Sparkfun thing, and i successfully flashed the firmware (v1.92), also i've followed all steps successfully. Though when i try to serial in, the response am getting is not even human readable. Changing the baud rate really doesn't help.
What could be the issue?

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What output do you get with baud rate at 9600?

Here:

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This also happens when i connect the esp82 module standalone

If you open the Espruino IDE and hit the Connect button, do you see your device in the list?

Yes. and it connects okay.

But trying to type in the commands doesn't work.
Though the RX button on the programmer blinks, meaning it receives the signals.

And are you trying to use screen to connect to the same device that the IDE marks as "Espruino board"? On my system trying to use a /dev/cu.* device fails, but I get two devices listed in the IDE, the other one being a /dev/tty.* device, which works.

It Really doesn't appear as Espruino Board, it shows the port and i can connect succesfully.

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So in your case, try screen /dev/tty.usbserial-A9048H4B

Not working.

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I don't know then I'm afraid.

Are you using 115200 in the ide baud rate setting?