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JP frequency - 20mW limit, change freqs to avoid duty cycle (#4446)

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Thanks to user Goyath on Discord, we discovered that in Japan the
250mW radio level requires licensing, and 20mW is the practical
limit. We also discovered that a duty cycle of 10% is needed on
most frequencies.

    CH 24-38 920.5-923.5 20mW no airtime restrictions
    CH 39-61 923.5-928.1 20mW 10% airtime
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Tom Fifield 2024-08-20 19:20:01 +08:00 committed by GitHub
parent 058e9769d6
commit 2472c7cdc7
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1 changed files with 4 additions and 2 deletions
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6
src/mesh/RadioInterface.cpp
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@ -53,8 +53,10 @@ const RegionInfo regions[] = {
/*
https://lora-alliance.org/wp-content/uploads/2020/11/lorawan_regional_parameters_v1.0.3reva_0.pdf
https://www.arib.or.jp/english/html/overview/doc/5-STD-T108v1_5-E1.pdf
https://qiita.com/ammo0613/items/d952154f1195b64dc29f
*/
RDEF(JP, 920.8f, 927.8f, 100, 0, 16, true, false, false),
RDEF(JP, 920.5f, 923.5f, 100, 0, 13, true, false, false),
/*
https://www.iot.org.au/wp/wp-content/uploads/2016/12/IoTSpectrumFactSheet.pdf
@ -615,4 +617,4 @@ size_t RadioInterface::beginSending(meshtastic_MeshPacket *p)
sendingPacket = p;
return p->encrypted.size + sizeof(PacketHeader);
}
}