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firmware/src/mesh/RadioInterface.cpp
Tom Fifield 234a56446b
Add frequencies for Philippines (#4951) 
There are three different frequencies available for Meshtastic
in the Philippines, each with pros and cons:
433 - 434.7 MHz <10 mW erp
868 - 869.4 MHz <25 mW erp
915 - 918 MHz <250 mW EIRP, no external antennna allowed

Philippines may also use LORA_24 unrestricted at up to 10mW, or up to
250mW if there is no external antennna.

Frequency rules in the Philippines are determined by aggregating the
information in laws, following the circulars referenced in the
[National Radio Frequency Allocation Table (NRFAT)](https://ntc.gov.ph/wp-content/uploads/2022/frequencyallocations/NRFAT_Rev_2020.pdf)
and then circulars that amend the circulars referenced in the NRFAT.
A full description of the regulatory basis can be found in the github issue:
https://github.com/meshtastic/firmware/issues/4948#issuecomment-2394926135

For 433MHz and 868MHz we refer to the Low Power Equipment rules for
"Non-specific Short Range Devices, Telemetry, Telecommand, Alarms,
Data In General and Other Similar Applications.".

For 915MHz and Wireless Data Network Services indoor device rules.

A device approved by the NTC is required for any use of Meshtastic
in the Philippines.

fixes https://github.com/meshtastic/firmware/issues/4948

Co-authored-by: Ben Meadors <benmmeadors@gmail.com>
2024-10-06 09:31:13 -05:00

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#include "RadioInterface.h"
#include "Channels.h"
#include "DisplayFormatters.h"
#include "MeshRadio.h"
#include "MeshService.h"
#include "NodeDB.h"
#include "Router.h"
#include "configuration.h"
#include "main.h"
#include "sleep.h"
#include <assert.h>
#include <pb_decode.h>
#include <pb_encode.h>
#define RDEF(name, freq_start, freq_end, duty_cycle, spacing, power_limit, audio_permitted, frequency_switching, wide_lora) \
{ \
meshtastic_Config_LoRaConfig_RegionCode_##name, freq_start, freq_end, duty_cycle, spacing, power_limit, audio_permitted, \
frequency_switching, wide_lora, #name \
}
const RegionInfo regions[] = {
/*
https://link.springer.com/content/pdf/bbm%3A978-1-4842-4357-2%2F1.pdf
https://www.thethingsnetwork.org/docs/lorawan/regional-parameters/
*/
RDEF(US, 902.0f, 928.0f, 100, 0, 30, true, false, false),
/*
https://lora-alliance.org/wp-content/uploads/2020/11/lorawan_regional_parameters_v1.0.3reva_0.pdf
*/
RDEF(EU_433, 433.0f, 434.0f, 10, 0, 12, true, false, false),
/*
https://www.thethingsnetwork.org/docs/lorawan/duty-cycle/
https://www.thethingsnetwork.org/docs/lorawan/regional-parameters/
https://www.legislation.gov.uk/uksi/1999/930/schedule/6/part/III/made/data.xht?view=snippet&wrap=true
audio_permitted = false per regulation
Special Note:
The link above describes LoRaWAN's band plan, stating a power limit of 16 dBm. This is their own suggested specification,
we do not need to follow it. The European Union regulations clearly state that the power limit for this frequency range is
500 mW, or 27 dBm. It also states that we can use interference avoidance and spectrum access techniques (such as LBT +
AFA) to avoid a duty cycle. (Please refer to line P page 22 of this document.)
https://www.etsi.org/deliver/etsi_en/300200_300299/30022002/03.01.01_60/en_30022002v030101p.pdf
*/
RDEF(EU_868, 869.4f, 869.65f, 10, 0, 27, false, false, false),
/*
https://lora-alliance.org/wp-content/uploads/2020/11/lorawan_regional_parameters_v1.0.3reva_0.pdf
*/
RDEF(CN, 470.0f, 510.0f, 100, 0, 19, true, false, false),
/*
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, 920.5f, 923.5f, 100, 0, 13, true, false, false),
/*
https://www.iot.org.au/wp/wp-content/uploads/2016/12/IoTSpectrumFactSheet.pdf
https://iotalliance.org.nz/wp-content/uploads/sites/4/2019/05/IoT-Spectrum-in-NZ-Briefing-Paper.pdf
*/
RDEF(ANZ, 915.0f, 928.0f, 100, 0, 30, true, false, false),
/*
https://digital.gov.ru/uploaded/files/prilozhenie-12-k-reshenyu-gkrch-18-46-03-1.pdf
Note:
- We do LBT, so 100% is allowed.
*/
RDEF(RU, 868.7f, 869.2f, 100, 0, 20, true, false, false),
/*
???
*/
RDEF(KR, 920.0f, 923.0f, 100, 0, 0, true, false, false),
/*
Taiwan, 920-925Mhz, limited to 0.5W indoor or coastal, 1.0W outdoor.
5.8.1 in the Low-power Radio-frequency Devices Technical Regulations
https://www.ncc.gov.tw/english/files/23070/102_5190_230703_1_doc_C.PDF
https://gazette.nat.gov.tw/egFront/e_detail.do?metaid=147283
*/
RDEF(TW, 920.0f, 925.0f, 100, 0, 27, true, false, false),
/*
https://lora-alliance.org/wp-content/uploads/2020/11/lorawan_regional_parameters_v1.0.3reva_0.pdf
*/
RDEF(IN, 865.0f, 867.0f, 100, 0, 30, true, false, false),
/*
https://rrf.rsm.govt.nz/smart-web/smart/page/-smart/domain/licence/LicenceSummary.wdk?id=219752
https://iotalliance.org.nz/wp-content/uploads/sites/4/2019/05/IoT-Spectrum-in-NZ-Briefing-Paper.pdf
*/
RDEF(NZ_865, 864.0f, 868.0f, 100, 0, 36, true, false, false),
/*
https://lora-alliance.org/wp-content/uploads/2020/11/lorawan_regional_parameters_v1.0.3reva_0.pdf
*/
RDEF(TH, 920.0f, 925.0f, 100, 0, 16, true, false, false),
/*
433,05-434,7 Mhz 10 mW
https://nkrzi.gov.ua/images/upload/256/5810/PDF_UUZ_19_01_2016.pdf
*/
RDEF(UA_433, 433.0f, 434.7f, 10, 0, 10, true, false, false),
/*
868,0-868,6 Mhz 25 mW
https://nkrzi.gov.ua/images/upload/256/5810/PDF_UUZ_19_01_2016.pdf
*/
RDEF(UA_868, 868.0f, 868.6f, 1, 0, 14, true, false, false),
/*
Malaysia
433 - 435 MHz at 100mW, no restrictions.
https://www.mcmc.gov.my/skmmgovmy/media/General/pdf/Short-Range-Devices-Specification.pdf
*/
RDEF(MY_433, 433.0f, 435.0f, 100, 0, 20, true, false, false),
/*
Malaysia
919 - 923 Mhz at 500mW, no restrictions.
923 - 924 MHz at 500mW with 1% duty cycle OR frequency hopping.
Frequency hopping is used for 919 - 923 MHz.
https://www.mcmc.gov.my/skmmgovmy/media/General/pdf/Short-Range-Devices-Specification.pdf
*/
RDEF(MY_919, 919.0f, 924.0f, 100, 0, 27, true, true, false),
/*
Singapore
SG_923 Band 30d: 917 - 925 MHz at 100mW, no restrictions.
https://www.imda.gov.sg/-/media/imda/files/regulation-licensing-and-consultations/ict-standards/telecommunication-standards/radio-comms/imdatssrd.pdf
*/
RDEF(SG_923, 917.0f, 925.0f, 100, 0, 20, true, false, false),
/*
Philippines
433 - 434.7 MHz <10 mW erp, NTC approved device required
868 - 869.4 MHz <25 mW erp, NTC approved device required
915 - 918 MHz <250 mW EIRP, no external antennna allowed
https://github.com/meshtastic/firmware/issues/4948#issuecomment-2394926135
*/
RDEF(PH_433, 433.0f, 434.7f, 100, 0, 10, true, false, false), RDEF(PH_868, 868.0f, 869.4f, 100, 0, 14, true, false, false),
RDEF(PH_915, 915.0f, 918.0f, 100, 0, 24, true, false, false),
/*
2.4 GHZ WLAN Band equivalent. Only for SX128x chips.
*/
RDEF(LORA_24, 2400.0f, 2483.5f, 100, 0, 10, true, false, true),
/*
This needs to be last. Same as US.
*/
RDEF(UNSET, 902.0f, 928.0f, 100, 0, 30, true, false, false)
};
const RegionInfo *myRegion;
bool RadioInterface::uses_default_frequency_slot = true;
static uint8_t bytes[MAX_LORA_PAYLOAD_LEN + 1];
void initRegion()
{
const RegionInfo *r = regions;
#ifdef REGULATORY_LORA_REGIONCODE
for (; r->code != meshtastic_Config_LoRaConfig_RegionCode_UNSET && r->code != REGULATORY_LORA_REGIONCODE; r++)
;
LOG_INFO("Wanted region %d, regulatory override to %s\n", config.lora.region, r->name);
#else
for (; r->code != meshtastic_Config_LoRaConfig_RegionCode_UNSET && r->code != config.lora.region; r++)
;
LOG_INFO("Wanted region %d, using %s\n", config.lora.region, r->name);
#endif
myRegion = r;
}
/**
* ## LoRaWAN for North America
LoRaWAN defines 64, 125 kHz channels from 902.3 to 914.9 MHz increments.
The maximum output power for North America is +30 dBM.
The band is from 902 to 928 MHz. It mentions channel number and its respective channel frequency. All the 13 channels are
separated by 2.16 MHz with respect to the adjacent channels. Channel zero starts at 903.08 MHz center frequency.
*/
/**
* Calculate airtime per
* https://www.rs-online.com/designspark/rel-assets/ds-assets/uploads/knowledge-items/application-notes-for-the-internet-of-things/LoRa%20Design%20Guide.pdf
* section 4
*
* @return num msecs for the packet
*/
uint32_t RadioInterface::getPacketTime(uint32_t pl)
{
float bandwidthHz = bw * 1000.0f;
bool headDisable = false; // we currently always use the header
float tSym = (1 << sf) / bandwidthHz;
bool lowDataOptEn = tSym > 16e-3 ? true : false; // Needed if symbol time is >16ms
float tPreamble = (preambleLength + 4.25f) * tSym;
float numPayloadSym =
8 + max(ceilf(((8.0f * pl - 4 * sf + 28 + 16 - 20 * headDisable) / (4 * (sf - 2 * lowDataOptEn))) * cr), 0.0f);
float tPayload = numPayloadSym * tSym;
float tPacket = tPreamble + tPayload;
uint32_t msecs = tPacket * 1000;
return msecs;
}
uint32_t RadioInterface::getPacketTime(const meshtastic_MeshPacket *p)
{
uint32_t pl = 0;
if (p->which_payload_variant == meshtastic_MeshPacket_encrypted_tag) {
pl = p->encrypted.size + sizeof(PacketHeader);
} else {
size_t numbytes = pb_encode_to_bytes(bytes, sizeof(bytes), &meshtastic_Data_msg, &p->decoded);
pl = numbytes + sizeof(PacketHeader);
}
return getPacketTime(pl);
}
/** The delay to use for retransmitting dropped packets */
uint32_t RadioInterface::getRetransmissionMsec(const meshtastic_MeshPacket *p)
{
size_t numbytes = pb_encode_to_bytes(bytes, sizeof(bytes), &meshtastic_Data_msg, &p->decoded);
uint32_t packetAirtime = getPacketTime(numbytes + sizeof(PacketHeader));
// Make sure enough time has elapsed for this packet to be sent and an ACK is received.
// LOG_DEBUG("Waiting for flooding message with airtime %d and slotTime is %d\n", packetAirtime, slotTimeMsec);
float channelUtil = airTime->channelUtilizationPercent();
uint8_t CWsize = map(channelUtil, 0, 100, CWmin, CWmax);
// Assuming we pick max. of CWsize and there will be a client with SNR at half the range
return 2 * packetAirtime + (pow(2, CWsize) + 2 * CWmax + pow(2, int((CWmax + CWmin) / 2))) * slotTimeMsec +
PROCESSING_TIME_MSEC;
}
/** The delay to use when we want to send something */
uint32_t RadioInterface::getTxDelayMsec()
{
/** We wait a random multiple of 'slotTimes' (see definition in header file) in order to avoid collisions.
The pool to take a random multiple from is the contention window (CW), which size depends on the
current channel utilization. */
float channelUtil = airTime->channelUtilizationPercent();
uint8_t CWsize = map(channelUtil, 0, 100, CWmin, CWmax);
// LOG_DEBUG("Current channel utilization is %f so setting CWsize to %d\n", channelUtil, CWsize);
return random(0, pow(2, CWsize)) * slotTimeMsec;
}
/** The delay to use when we want to flood a message */
uint32_t RadioInterface::getTxDelayMsecWeighted(float snr)
{
// The minimum value for a LoRa SNR
const uint32_t SNR_MIN = -20;
// The maximum value for a LoRa SNR
const uint32_t SNR_MAX = 15;
// high SNR = large CW size (Long Delay)
// low SNR = small CW size (Short Delay)
uint32_t delay = 0;
uint8_t CWsize = map(snr, SNR_MIN, SNR_MAX, CWmin, CWmax);
// LOG_DEBUG("rx_snr of %f so setting CWsize to:%d\n", snr, CWsize);
if (config.device.role == meshtastic_Config_DeviceConfig_Role_ROUTER ||
config.device.role == meshtastic_Config_DeviceConfig_Role_REPEATER) {
delay = random(0, 2 * CWsize) * slotTimeMsec;
LOG_DEBUG("rx_snr found in packet. As a router, setting tx delay:%d\n", delay);
} else {
// offset the maximum delay for routers: (2 * CWmax * slotTimeMsec)
delay = (2 * CWmax * slotTimeMsec) + random(0, pow(2, CWsize)) * slotTimeMsec;
LOG_DEBUG("rx_snr found in packet. Setting tx delay:%d\n", delay);
}
return delay;
}
void printPacket(const char *prefix, const meshtastic_MeshPacket *p)
{
#ifdef DEBUG_PORT
std::string out = DEBUG_PORT.mt_sprintf("%s (id=0x%08x fr=0x%02x to=0x%02x, WantAck=%d, HopLim=%d Ch=0x%x", prefix, p->id,
p->from & 0xff, p->to & 0xff, p->want_ack, p->hop_limit, p->channel);
if (p->which_payload_variant == meshtastic_MeshPacket_decoded_tag) {
auto &s = p->decoded;
out += DEBUG_PORT.mt_sprintf(" Portnum=%d", s.portnum);
if (s.want_response)
out += DEBUG_PORT.mt_sprintf(" WANTRESP");
if (p->pki_encrypted)
out += DEBUG_PORT.mt_sprintf(" PKI");
if (s.source != 0)
out += DEBUG_PORT.mt_sprintf(" source=%08x", s.source);
if (s.dest != 0)
out += DEBUG_PORT.mt_sprintf(" dest=%08x", s.dest);
if (s.request_id)
out += DEBUG_PORT.mt_sprintf(" requestId=%0x", s.request_id);
/* now inside Data and therefore kinda opaque
if (s.which_ackVariant == SubPacket_success_id_tag)
out += DEBUG_PORT.mt_sprintf(" successId=%08x", s.ackVariant.success_id);
else if (s.which_ackVariant == SubPacket_fail_id_tag)
out += DEBUG_PORT.mt_sprintf(" failId=%08x", s.ackVariant.fail_id); */
} else {
out += " encrypted";
}
if (p->rx_time != 0)
out += DEBUG_PORT.mt_sprintf(" rxtime=%u", p->rx_time);
if (p->rx_snr != 0.0)
out += DEBUG_PORT.mt_sprintf(" rxSNR=%g", p->rx_snr);
if (p->rx_rssi != 0)
out += DEBUG_PORT.mt_sprintf(" rxRSSI=%i", p->rx_rssi);
if (p->via_mqtt != 0)
out += DEBUG_PORT.mt_sprintf(" via MQTT");
if (p->hop_start != 0)
out += DEBUG_PORT.mt_sprintf(" hopStart=%d", p->hop_start);
if (p->priority != 0)
out += DEBUG_PORT.mt_sprintf(" priority=%d", p->priority);
out += ")";
LOG_DEBUG("%s\n", out.c_str());
#endif
}
RadioInterface::RadioInterface()
{
assert(sizeof(PacketHeader) == MESHTASTIC_HEADER_LENGTH); // make sure the compiler did what we expected
}
bool RadioInterface::reconfigure()
{
applyModemConfig();
return true;
}
bool RadioInterface::init()
{
LOG_INFO("Starting meshradio init...\n");
configChangedObserver.observe(&service->configChanged);
preflightSleepObserver.observe(&preflightSleep);
notifyDeepSleepObserver.observe(&notifyDeepSleep);
// we now expect interfaces to operate in promiscuous mode
// radioIf.setThisAddress(nodeDB->getNodeNum()); // Note: we must do this here, because the nodenum isn't inited at
// constructor time.
applyModemConfig();
return true;
}
int RadioInterface::notifyDeepSleepCb(void *unused)
{
sleep();
return 0;
}
/** hash a string into an integer
*
* djb2 by Dan Bernstein.
* http://www.cse.yorku.ca/~oz/hash.html
*/
uint32_t hash(const char *str)
{
uint32_t hash = 5381;
int c;
while ((c = *str++) != 0)
hash = ((hash << 5) + hash) + (unsigned char)c; /* hash * 33 + c */
return hash;
}
/**
* Save our frequency for later reuse.
*/
void RadioInterface::saveFreq(float freq)
{
savedFreq = freq;
}
/**
* Save our channel for later reuse.
*/
void RadioInterface::saveChannelNum(uint32_t channel_num)
{
savedChannelNum = channel_num;
}
/**
* Save our frequency for later reuse.
*/
float RadioInterface::getFreq()
{
return savedFreq;
}
/**
* Save our channel for later reuse.
*/
uint32_t RadioInterface::getChannelNum()
{
return savedChannelNum;
}
/**
* Pull our channel settings etc... from protobufs to the dumb interface settings
*/
void RadioInterface::applyModemConfig()
{
// Set up default configuration
// No Sync Words in LORA mode
meshtastic_Config_LoRaConfig &loraConfig = config.lora;
bool validConfig = false; // We need to check for a valid configuration
while (!validConfig) {
if (loraConfig.use_preset) {
switch (loraConfig.modem_preset) {
case meshtastic_Config_LoRaConfig_ModemPreset_SHORT_TURBO:
bw = (myRegion->wideLora) ? 1625.0 : 500;
cr = 5;
sf = 7;
break;
case meshtastic_Config_LoRaConfig_ModemPreset_SHORT_FAST:
bw = (myRegion->wideLora) ? 812.5 : 250;
cr = 5;
sf = 7;
break;
case meshtastic_Config_LoRaConfig_ModemPreset_SHORT_SLOW:
bw = (myRegion->wideLora) ? 812.5 : 250;
cr = 5;
sf = 8;
break;
case meshtastic_Config_LoRaConfig_ModemPreset_MEDIUM_FAST:
bw = (myRegion->wideLora) ? 812.5 : 250;
cr = 5;
sf = 9;
break;
case meshtastic_Config_LoRaConfig_ModemPreset_MEDIUM_SLOW:
bw = (myRegion->wideLora) ? 812.5 : 250;
cr = 5;
sf = 10;
break;
default: // Config_LoRaConfig_ModemPreset_LONG_FAST is default. Gracefully use this is preset is something illegal.
bw = (myRegion->wideLora) ? 812.5 : 250;
cr = 5;
sf = 11;
break;
case meshtastic_Config_LoRaConfig_ModemPreset_LONG_MODERATE:
bw = (myRegion->wideLora) ? 406.25 : 125;
cr = 8;
sf = 11;
break;
case meshtastic_Config_LoRaConfig_ModemPreset_LONG_SLOW:
bw = (myRegion->wideLora) ? 406.25 : 125;
cr = 8;
sf = 12;
break;
case meshtastic_Config_LoRaConfig_ModemPreset_VERY_LONG_SLOW:
bw = (myRegion->wideLora) ? 203.125 : 62.5;
cr = 8;
sf = 12;
break;
}
} else {
sf = loraConfig.spread_factor;
cr = loraConfig.coding_rate;
bw = loraConfig.bandwidth;
if (bw == 31) // This parameter is not an integer
bw = 31.25;
if (bw == 62) // Fix for 62.5Khz bandwidth
bw = 62.5;
if (bw == 200)
bw = 203.125;
if (bw == 400)
bw = 406.25;
if (bw == 800)
bw = 812.5;
if (bw == 1600)
bw = 1625.0;
}
if ((myRegion->freqEnd - myRegion->freqStart) < bw / 1000) {
static const char *err_string =
"Regional frequency range is smaller than bandwidth. Falling back to default preset.\n";
LOG_ERROR(err_string);
RECORD_CRITICALERROR(meshtastic_CriticalErrorCode_INVALID_RADIO_SETTING);
meshtastic_ClientNotification *cn = clientNotificationPool.allocZeroed();
cn->level = meshtastic_LogRecord_Level_ERROR;
sprintf(cn->message, err_string);
service->sendClientNotification(cn);
// Set to default modem preset
loraConfig.use_preset = true;
loraConfig.modem_preset = meshtastic_Config_LoRaConfig_ModemPreset_LONG_FAST;
} else {
validConfig = true;
}
}
power = loraConfig.tx_power;
if ((power == 0) || ((power + REGULATORY_GAIN_LORA > myRegion->powerLimit) && !devicestate.owner.is_licensed))
power = myRegion->powerLimit - REGULATORY_GAIN_LORA;
if (power == 0)
power = 17; // Default to this power level if we don't have a valid regional power limit (powerLimit of myRegion defaults
// to 0, currently no region has an actual power limit of 0 [dBm] so we can assume regions which have this
// variable set to 0 don't have a valid power limit)
// Set final tx_power back onto config
loraConfig.tx_power = (int8_t)power; // cppcheck-suppress assignmentAddressToInteger
// Calculate the number of channels
uint32_t numChannels = floor((myRegion->freqEnd - myRegion->freqStart) / (myRegion->spacing + (bw / 1000)));
// If user has manually specified a channel num, then use that, otherwise generate one by hashing the name
const char *channelName = channels.getName(channels.getPrimaryIndex());
// channel_num is actually (channel_num - 1), since modulus (%) returns values from 0 to (numChannels - 1)
uint32_t channel_num = (loraConfig.channel_num ? loraConfig.channel_num - 1 : hash(channelName)) % numChannels;
// Check if we use the default frequency slot
RadioInterface::uses_default_frequency_slot =
channel_num == hash(DisplayFormatters::getModemPresetDisplayName(config.lora.modem_preset, false)) % numChannels;
// Old frequency selection formula
// float freq = myRegion->freqStart + ((((myRegion->freqEnd - myRegion->freqStart) / numChannels) / 2) * channel_num);
// New frequency selection formula
float freq = myRegion->freqStart + (bw / 2000) + (channel_num * (bw / 1000));
// override if we have a verbatim frequency
if (loraConfig.override_frequency) {
freq = loraConfig.override_frequency;
channel_num = -1;
}
saveChannelNum(channel_num);
saveFreq(freq + loraConfig.frequency_offset);
slotTimeMsec = computeSlotTimeMsec(bw, sf);
preambleTimeMsec = getPacketTime((uint32_t)0);
maxPacketTimeMsec = getPacketTime(meshtastic_Constants_DATA_PAYLOAD_LEN + sizeof(PacketHeader));
LOG_INFO("Radio freq=%.3f, config.lora.frequency_offset=%.3f\n", freq, loraConfig.frequency_offset);
LOG_INFO("Set radio: region=%s, name=%s, config=%u, ch=%d, power=%d\n", myRegion->name, channelName, loraConfig.modem_preset,
channel_num, power);
LOG_INFO("myRegion->freqStart -> myRegion->freqEnd: %f -> %f (%f MHz)\n", myRegion->freqStart, myRegion->freqEnd,
myRegion->freqEnd - myRegion->freqStart);
LOG_INFO("numChannels: %d x %.3fkHz\n", numChannels, bw);
LOG_INFO("channel_num: %d\n", channel_num + 1);
LOG_INFO("frequency: %f\n", getFreq());
LOG_INFO("Slot time: %u msec\n", slotTimeMsec);
}
/**
* Some regulatory regions limit xmit power.
* This function should be called by subclasses after setting their desired power. It might lower it
*/
void RadioInterface::limitPower()
{
uint8_t maxPower = 255; // No limit
if (myRegion->powerLimit)
maxPower = myRegion->powerLimit;
if ((power > maxPower) && !devicestate.owner.is_licensed) {
LOG_INFO("Lowering transmit power because of regulatory limits\n");
power = maxPower;
}
LOG_INFO("Set radio: final power level=%d\n", power);
}
void RadioInterface::deliverToReceiver(meshtastic_MeshPacket *p)
{
if (router)
router->enqueueReceivedMessage(p);
}
/***
* given a packet set sendingPacket and decode the protobufs into radiobuf. Returns # of payload bytes to send
*/
size_t RadioInterface::beginSending(meshtastic_MeshPacket *p)
{
assert(!sendingPacket);
// LOG_DEBUG("sending queued packet on mesh (txGood=%d,rxGood=%d,rxBad=%d)\n", rf95.txGood(), rf95.rxGood(), rf95.rxBad());
assert(p->which_payload_variant == meshtastic_MeshPacket_encrypted_tag); // It should have already been encoded by now
lastTxStart = millis();
radioBuffer.header.from = p->from;
radioBuffer.header.to = p->to;
radioBuffer.header.id = p->id;
radioBuffer.header.channel = p->channel;
radioBuffer.header.next_hop = 0; // *** For future use ***
radioBuffer.header.relay_node = 0; // *** For future use ***
if (p->hop_limit > HOP_MAX) {
LOG_WARN("hop limit %d is too high, setting to %d\n", p->hop_limit, HOP_RELIABLE);
p->hop_limit = HOP_RELIABLE;
}
radioBuffer.header.flags =
p->hop_limit | (p->want_ack ? PACKET_FLAGS_WANT_ACK_MASK : 0) | (p->via_mqtt ? PACKET_FLAGS_VIA_MQTT_MASK : 0);
radioBuffer.header.flags |= (p->hop_start << PACKET_FLAGS_HOP_START_SHIFT) & PACKET_FLAGS_HOP_START_MASK;
// if the sender nodenum is zero, that means uninitialized
assert(radioBuffer.header.from);
memcpy(radioBuffer.payload, p->encrypted.bytes, p->encrypted.size);
sendingPacket = p;
return p->encrypted.size + sizeof(PacketHeader);
}
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