From 2472c7cdc73dc2c763d8fed6f970b2ac464d417c Mon Sep 17 00:00:00 2001 From: Tom Fifield Date: Tue, 20 Aug 2024 19:20:01 +0800 Subject: [PATCH] JP frequency - 20mW limit, change freqs to avoid duty cycle (#4446) 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 --- src/mesh/RadioInterface.cpp | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/src/mesh/RadioInterface.cpp b/src/mesh/RadioInterface.cpp index f0048dd3d..eacd49644 100644 --- a/src/mesh/RadioInterface.cpp +++ b/src/mesh/RadioInterface.cpp @@ -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); -} \ No newline at end of file +}