Can I use sub-ghz (433 Mhz) to transmit audio.I already used radiohead library with RFM96 to transmit small packets of data and built a point to point mesh chat application. Now i wanted to test FSK supported chip like rfm69hcw to transmit audio in 433Mhz ISM band. i think audio needs a data rate of 5-6 kbps. RFM69hcw supportsit. My question:

  1. Will it work for HALF-duplex quality audio transmission?
  2. Can this be done with rfm69 and radiohead library, as radiohead has a packet length limitation


  • $\begingroup$ Watch out for the 10% duty cycle and bandwidth limitations in the 433 ISM band, and the rule of "no audio and voice". See also this question $\endgroup$ – tomnexus Jul 18 at 14:58
  • $\begingroup$ Thanks @tomnexus. We are working for goverment in south-east asia. Permission is not an issue.Also this is for test purpose. What i wanted to know if anyone has done this? Also radiohead library and with rfm69 is this achievable? $\endgroup$ – Asif Rahman Jul 19 at 6:10
  • $\begingroup$ Hello and welcome to ham.stackexchange.com! $\endgroup$ – rclocher3 Jul 19 at 13:38

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