I want to create an endless stream of characters like /dev/zero but I want it to spam custom made character (like 'a') rather than 0x00. Is there a method to do it?
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Given that $COMMAND terminates correctly, Will probably be run again. If it fails or is terminated by sign, the loop will close.
two Seems like the modem is echoing the command back again to you (envisioned) but then the tty port is sending the command again into the modem and developing your endless loop. Check out: stty -echo to stop the port from echoing the instructions back again to the modem.
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I'm sure this repetition is definitely an artifact, as I've employed a serial logic analyzer linked to the RX output coming in the serial product, and only see The one
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This will work since slumber 1 sticks all-around for a while and if it receives ctrl+c it return with non zero as well as the get more info loop will terminate.
Tried out various huawei USB modems, and unique stty settings and likewise default settings for huawei modems:
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EDIT: The main reason you got the AT - Alright loop, is that you've got enabled regional terminal echo in the two your terminal and within the modem side in the AT interpreter. To show off echo inside the AT interpreter, problem: ATE0 (which is a zero) as your 1st command.