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fix: send wifiStrength only for real signal changes

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At -70 dBm the RSSI moves a dBm or two constantly, so the >1 dBm check
every 1.5s sent wifiStrength to every client about 270 times an hour.
That is extra traffic on an already lossy link and a state write in
Home Assistant for each one.

Broadcast on a channel change, or for a change of at least 3 dBm no
more than every 10s. A newly connected client still gets the current
value straight away.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
cjkas 2026-10-11 20:35:42 +02:00
parent 1d1f685fce
commit 05c3d309a6
5 changed files with 44 additions and 2 deletions
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5
src/Utils.cpp
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@ -130,3 +130,8 @@ int Timestamp::tzOffset() {
time(&now);
return Timestamp::calcTZOffset(&now);
}
bool rssiNeedsEmit(int rssi, int lastRssi, int channel, int lastChannel, uint32_t sinceLastMs, int minDelta, uint32_t minMs) {
if(channel != lastChannel) return true;
int delta = rssi > lastRssi ? rssi - lastRssi : lastRssi - rssi;
return delta >= minDelta && sinceLastMs >= minMs;
}