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Who is "they"? Unless I'm confused (which is certainly possible), the 433 MHz ISM allocation doesn't exist in the US. There's only the 420-450 MHz ham allocatio
by geofft 8y ago
Who is "they"? Unless I'm confused (which is certainly possible), the 433 MHz ISM allocation doesn't exist in the US. There's only the 420-450 MHz ham allocation.
Is there also a ban on encryption in the countries where it exists, or is that an FCC-only thing?
- edoo 8y ago433.92 ISM is only EU/Africa. So yeah in the US it would be illegal to use encryption. There are quite a few lower frequency ISM bands that might offer much greater range. I'm interested in this stuff because I just started playing with these: https://cdn.sparkfun.com/assets/a/a/0/b/5/DS_SX1276-7-8-9_W_APP_V5.pdf https://cdn.sparkfun.com/assets/a/a/0/b/5/DS_SX1276-7-8-9_W_... They do spread spectrum on ISM bands with extremely low data rates for insane sensitivity. I want to see what kind of stable distance you can get with lower frequencies and possibly even lower bitrates.
- geofft 8y agoOoh, thanks for the link! Yeah I would love to do SSH/Mosh over packet radio but I can't do that with my ham license :(