diff --git a/main.cpp b/main.cpp index 9948412..0502d41 100644 --- a/main.cpp +++ b/main.cpp @@ -7,48 +7,31 @@ so the copyright for this code belongs to Heltec Automation. Any additional changes are free-to-use, but at your own risk. */ +// CONFIGURATION of Meshtastic channel name and speed: change values in MeshRadio.h ! + #include // needed for platform.io #include "mesh.pb.h" +#include "MeshRadio.h" -// ToRadio Incoming; // not used right now -// Radio settings for meshtastic channel "Default" @ "very long range (but slow)". Will not work with other settings or channels. -// #define RF_FREQUENCY 865200000 // Hz -- see "CH0" in Meshradio.h -#define TX_OUTPUT_POWER 22 // dBm -#define LORA_BANDWIDTH 0 // [0: 125 kHz, 1: 250 kHz, 2: 500 kHz, 3: 62.5kHz, 4: 41.67kHz, 5: 31.25kHz, 6: 20.83kHz, 7: 15.63kHz, 8: 10.42kHz, 9: 7.81kHz] -// FYI: -// const RadioLoRaBandwidths_t Bandwidths[] = { LORA_BW_125, LORA_BW_250, LORA_BW_500, LORA_BW_062,LORA_BW_041, LORA_BW_031, LORA_BW_020, LORA_BW_015, LORA_BW_010, LORA_BW_007 }; - - -#define LORA_SPREADING_FACTOR 12 // [SF5..SF12] -#define LORA_CODINGRATE 4 // [1: 4/5, 2: 4/6, 3: 4/7, 4: 4/8] #define LORA_PREAMBLE_LENGTH 32 // Same for Tx and Rx #define LORA_SYMBOL_TIMEOUT 0 // Symbols -#define LORA_FIX_LENGTH_PAYLOAD_ON false -#define LORA_IQ_INVERSION_ON false -#define LORA_CHAN_NUM 0 // Channel Number (meshtastic specific) #define RX_TIMEOUT_VALUE 1000 #define BUFFER_SIZE 0xFF // max payload (see \cores\asr650x\device\asr6501_lrwan\radio.c --> MaxPayloadLength) - #define ID_BUFFER_SIZE 32 char mPacket[BUFFER_SIZE]; -#define HW_VERSION_EU865 // define your region _before_ including MeshRadio.h ! -#include "MeshRadio.h" -// initializing ChannelSettings with valid data... You can modify it to your settings here. Do not use ModemConfig. Change bw/sf/cr instead! -// "Bandwidth" is the index of the array Bandwidths (see above), not the actual bandwidth! Index is starting with 0. -ChannelSettings_psk_t mPSK; // not used -ChannelSettings ChanSet={ TX_OUTPUT_POWER, ChannelSettings_ModemConfig_Bw125Cr48Sf4096, mPSK, "Default", - LORA_BANDWIDTH, LORA_SPREADING_FACTOR, LORA_CODINGRATE, LORA_CHAN_NUM }; - -uint32_t receivedID[ID_BUFFER_SIZE]; -int receivedCount = -1; - static RadioEvents_t RadioEvents; void OnTxDone( void ); void OnTxTimeout( void ); void OnRxDone( uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr ); void ConfigureRadio( ChannelSettings ChanSet ); +unsigned long hash(char *str); + +ChannelSettings ChanSet; + +uint32_t receivedID[ID_BUFFER_SIZE]; +int receivedCount = -1; typedef enum { @@ -63,20 +46,66 @@ uint32_t x; // re-used variable of type uint32_t, used in onRxDone() bool found; // used in onRxDone() -#define NOTSILENT // delete or change to VERBOSE if serial output is needed +#define VERBOSE // delete or change to VERBOSE if serial output is needed void setup() { #ifndef SILENT Serial.begin(115200); - Serial.print("\nSetting up Radio.."); + Serial.println("\nSetting up Radio:"); #endif RadioEvents.TxDone = OnTxDone; RadioEvents.TxTimeout = OnTxTimeout; RadioEvents.RxDone = OnRxDone; Radio.Init( &RadioEvents ); + + ChanSet.name[12] = MESHTASTIC_NAME[12]; + ChanSet.channel_num = hash( MESHTASTIC_NAME ) % NUM_CHANNELS; // see MeshRadio.h + ChanSet.tx_power = TX_OUTPUT_POWER; + /* FYI: + "bandwidth": + [0: 125 kHz, 1: 250 kHz, 2: 500 kHz, 3: 62.5kHz, 4: 41.67kHz, 5: 31.25kHz, 6: 20.83kHz, 7: 15.63kHz, 8: 10.42kHz, 9: 7.81kHz] + "speed": + 0: ChannelSettings_ModemConfig_Bw125Cr45Sf128 aka short range + 1: ChannelSettings_ModemConfig_Bw500Cr45Sf128 aka medium range + 2: ChannelSettings_ModemConfig_Bw31_25Cr48Sf512 aka long range + 3: ChannelSettings_ModemConfig_Bw125Cr48Sf4096 aka very long range + "coding rate": + [1: 4/5, 2: 4/6, 3: 4/7, 4: 4/8] + */ + switch ( MESHTASTIC_SPEED ){ + case 0: { // short range + ChanSet.bandwidth = 0; // 125 kHz + ChanSet.coding_rate = 1; // = 4/5 + ChanSet.spread_factor = 7; + break; + } + case 1: { // medium range + ChanSet.bandwidth = 2; // 500 kHz + ChanSet.coding_rate = 1; // = 4/5 + ChanSet.spread_factor = 7; + break; + } + case 2: { // long range + ChanSet.bandwidth = 5; // 31.25 kHz + ChanSet.coding_rate = 4; // = 4/5 + ChanSet.spread_factor = 9; + break; + } + case 3: { // very long range + ChanSet.bandwidth = 0; // 125 kHz + ChanSet.coding_rate = 4; // = 4/8 + ChanSet.spread_factor = 12; + break; + } + default:{ // default setting is medium range + ChanSet.bandwidth = 2; // 500 kHz + ChanSet.coding_rate = 1; // = 4/5 + ChanSet.spread_factor = 7; + } + } ConfigureRadio( ChanSet ); #ifndef SILENT - Serial.println(".done!\n"); + Serial.println("..done!\n"); #endif state=RX; // initial mode = receive } @@ -128,6 +157,8 @@ void OnRxDone( uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr ) ( size > BUFFER_SIZE ) ? rxSize = BUFFER_SIZE : rxSize = size; memcpy( mPacket, payload, size ); Radio.Sleep(); + uint32_t packetID = (uint32_t)mPacket[11]<<24 | (uint32_t)mPacket[10]<<16 | (uint32_t)mPacket[9]<<8 | (uint32_t)mPacket[8]; + #ifndef SILENT Serial.printf("\nReceived packet! (Size %i bytes, RSSI %i, SNR %i)\n", size, rssi, snr); @@ -140,11 +171,14 @@ void OnRxDone( uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr ) for(int i=7; i>3; i--){ Serial.print(mPacket[i], HEX); } - +/* Serial.print(" PacketID: "); for(int i=11; i>7; i--){ Serial.print(mPacket[i], HEX); } +*/ + Serial.print(" Packet ID: "); + Serial.println(packetID, HEX); Serial.print(" Flags: "); x = mPacket[12]; @@ -165,11 +199,9 @@ void OnRxDone( uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr ) } Serial.println(); #endif - // uint32_t packetID - x = (uint32_t)mPacket[11]<<24 | (uint32_t)mPacket[10]<<16 | (uint32_t)mPacket[9]<<8 | (uint32_t)mPacket[8]; found = false; for(int i = 0; i < ID_BUFFER_SIZE; i++){ - if (receivedID[i] == x) found = true; + if (receivedID[i] == packetID) found = true; } if (!found){ state=TX; // will repeat package @@ -184,12 +216,26 @@ void OnRxDone( uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr ) } } +// hash a string into an integer - djb2 by Dan Bernstein. - +// http://www.cse.yorku.ca/~oz/hash.html +unsigned long hash(char *str) +{ + unsigned long hash = 5381; + int c; + while ((c = *str++) != 0) + hash = ((hash << 5) + hash) + (unsigned char) c; + return hash; +} + void ConfigureRadio( ChannelSettings ChanSet ) { uint32_t freq = (CH0 + CH_SPACING * ChanSet.channel_num)*1E6; - - Serial.printf("\nSetting frequency to: %i ..",freq ); - + #ifndef SILENT + Serial.printf("\nSetting frequency to %i Hz (meshtastic channel %i) .. \n",freq,ChanSet.channel_num ); + Serial.printf("Setting bandwidth to index %i ..\n",ChanSet.bandwidth); + Serial.printf("Setting CodeRate to index %i .. \n", ChanSet.coding_rate); + Serial.printf("Setting SpreadingFactor to %i ..\n",ChanSet.spread_factor); + #endif Radio.SetChannel( freq ); Radio.SetTxConfig( MODEM_LORA, TX_OUTPUT_POWER, 0, ChanSet.bandwidth, ChanSet.spread_factor, ChanSet.coding_rate, LORA_PREAMBLE_LENGTH, false, true, false, 0, false, 20000 );