And now these are no longer a number and boolean, like they were earlier, and like they should be. Doesn’t TTN return some error that shows in your echo statements? If not, try with curl -v on the command line first? See Downlink from HTTP integration does not show in TTN Console and does not reach my device and Using curl or Postman for the HTTP Integration on Windows.
Also, if this would work, you would send the text 00, which might not be what you want to send?