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[LoRaWAN] Fix Tx power calculation

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This commit is contained in:
StevenCellist 2024-01-24 08:46:10 +01:00
parent 51ab103d07
commit b98a5c6b29
1 changed files with 2 additions and 2 deletions
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4
src/protocols/LoRaWAN/LoRaWAN.cpp
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@ -2026,7 +2026,7 @@ int16_t LoRaWANNode::setTxPower(int8_t txPower, bool saveToEeprom) {
// Tx Power is set in steps of two
// the selected value is rounded down to nearest multiple of two away from txPowerMax
// e.g. on EU868, max is 16; if 13 is selected then we set to 12
uint8_t txPowerNew = (this->txPowerMax - txPower) / 2 + 1;
uint8_t numSteps = (this->txPowerMax - txPower + 1) / (-RADIOLIB_LORAWAN_POWER_STEP_SIZE_DBM);
LoRaWANMacCommand_t cmd = {
.cid = RADIOLIB_LORAWAN_MAC_LINK_ADR,
@ -2035,7 +2035,7 @@ int16_t LoRaWANNode::setTxPower(int8_t txPower, bool saveToEeprom) {
.repeat = 0,
};
cmd.payload[0] = 0xF0; // keep datarate the same
cmd.payload[0] |= txPowerNew; // set the Tx Power
cmd.payload[0] |= numSteps; // set the Tx Power
cmd.payload[3] = (1 << 7); // set the RFU bit, which means that the channel mask gets ignored
cmd.payload[3] |= 0; // keep NbTrans the same
(void)execMacCommand(&cmd, saveToEeprom);