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Add REGULATORY_GAIN configuration to remain within regulatory ERP limit

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REGULATORY_GAIN is the total system gain in dBm to subtract from the configured Tx power, to remain within regulatory ERP limit for non-licensed operators.

This value should be set in variant.h and is PA gain + antenna gain (if system ships with an antenna).

This is similar to antenna_gain/NL80211_ATTR_WIPHY_ANTENNA_GAIN/NL80211_ATTR_REG_RULE_POWER_MAX_ANT_GAIN setting in Linux Regulatory/OpenWrt/mac80211/nl80211/iw.

Signed-off-by: Andrew Yong <me@ndoo.sg>
This commit is contained in:
Andrew Yong 2024-05-09 02:27:08 +08:00
parent 5554cc46a7
commit 3cda598673
2 changed files with 8 additions and 2 deletions
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6
src/configuration.h
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@ -81,6 +81,12 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
// Override user saved region, for producing region-locked builds
// #define REGULATORY_LORA_REGIONCODE meshtastic_Config_LoRaConfig_RegionCode_SG_923
// Total system gain in dBm to subtract from Tx power to remain within regulatory ERP limit for non-licensed operators
// This value should be set in variant.h and is PA gain + antenna gain (if system ships with an antenna)
#ifndef REGULATORY_GAIN
#define REGULATORY_GAIN 0
#endif
// -----------------------------------------------------------------------------
// Feature toggles
// -----------------------------------------------------------------------------

4
src/mesh/RadioInterface.cpp
View File

@ -478,8 +478,8 @@ void RadioInterface::applyModemConfig()
power = loraConfig.tx_power;
if ((power == 0) || ((power > myRegion->powerLimit) && !devicestate.owner.is_licensed))
power = myRegion->powerLimit;
if ((power == 0) || ((power + REGULATORY_GAIN > myRegion->powerLimit) && !devicestate.owner.is_licensed))
power = myRegion->powerLimit - REGULATORY_GAIN;
if (power == 0)
power = 17; // Default to this power level if we don't have a valid regional power limit (powerLimit of myRegion defaults