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A print that is paused with an M0 can be unpaused with M108. That works with my Chiron running Marlin 2.0.7.2. However, it also has a display that uses its' own serial protocol to communicate with Marlin. I want that display to be able to unpause my printer when it has encountered M0 in the G-code. I tried injectCommands_P(PSTR("M108\n")); in the code, but it did not work. Perhaps I should not have a new-line at the end of it.

What is the correct command to do this?

void GcodeSuite::M108() {
  TERN_(HAS_RESUME_CONTINUE, wait_for_user = false);
  wait_for_heatup = false;
}

Above is the Marlin code for M108. Would be great if someone could decipher what TERN means.

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Reset to default
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The correct Marlin-command to unpause seems to be setUserConfirmed(). I have tested that it works.

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