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CubeCellRepeater
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CubeCellRepeater/experimental/main.cpp

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C++
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#include <Arduino.h>
#include "config.h"
// CONFIGURATION:
// Change RegionCode, Frequency, Speed in config.h !
#define VERBOSE // define to SILENT to turn off serial messages
#define NOBLINK // define to NOBLINK to turn off LED signaling
#define NO_OLED // define to NO_OLED to turn off display
// OLED supported for cubecell_board_Plus (HTCC-AB02) and cubecell_gps (HTCC-AB02S)
// :CONFIGURATION
static MeshPacket thePacket;
static ChannelSettings ChanSet;
static RadioEvents_t RadioEvents;
static TimerEvent_t CheckRadio;
static uint32_t lastreceivedID = 0;
//static uint32_t lpTime;
static uint32_t dutyTime;
static bool noTimer;
static uint32_t startTime = 0;
#ifndef NOBLINK
#include "CubeCell_NeoPixel.h"
CubeCell_NeoPixel LED(1, RGB, NEO_GRB + NEO_KHZ800);
#endif
#ifndef NO_OLED
#ifdef CubeCell_BoardPlus
#include "cubecell_SH1107Wire.h"
SH1107Wire display(0x3c, 500000, I2C_NUM_0,GEOMETRY_128_64,GPIO10 );
#endif
#ifdef CubeCell_GPS
#include "cubecell_SSD1306Wire.h"
SSD1306Wire display(0x3c, 500000, I2C_NUM_0,GEOMETRY_128_64,GPIO10 );
#endif
char str[32];
#endif
void setup() {
TimerInit( &CheckRadio, onCheckRadio );
#ifndef NO_OLED
pinMode(Vext,OUTPUT);
digitalWrite(Vext,LOW);
#endif
#ifndef NOBLINK
pinMode(Vext,OUTPUT);
digitalWrite(Vext,LOW);
delay(100);
LED.begin();
LED.clear( );
LED.show();
#endif
#ifndef NO_OLED
display.init();
display.clear();
display.setTextAlignment(TEXT_ALIGN_LEFT);
display.setFont(ArialMT_Plain_16);
display.drawString(0,0,"CC Repeater");
display.display();
#endif
#ifndef SILENT
Serial.begin(115200);
MSG("\nSetting up Radio:\n");
#endif
RadioEvents.TxDone = onTxDone;
RadioEvents.TxTimeout = onTxTimeout;
RadioEvents.RxDone = onRxDone;
RadioEvents.RxTimeout = onRxTimeout;
RadioEvents.CadDone = onCadDone;
Radio.Init( &RadioEvents );
Radio.Sleep();
memcpy(ChanSet.name, MESHTASTIC_NAME, 12);
ChanSet.channel_num = hash( MESHTASTIC_NAME ) % regions[REGION].numChannels; // see config.h
ChanSet.tx_power = (regions[REGION].powerLimit == 0) ? TX_MAX_POWER : MIN(regions[REGION].powerLimit, TX_MAX_POWER) ;
//ChanSet.psk = MESHTASTIC_PSK;
ChanSet.psk = PSK_NOENCRYPTION;
/* 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;
dutyTime = 10.24; // 10 symbols
break;
}
case 1: { // medium range
ChanSet.bandwidth = 2; // 500 kHz
ChanSet.coding_rate = 1; // = 4/5
ChanSet.spread_factor = 7;
dutyTime = 2.56;
break;
}
case 2: { // long range
ChanSet.bandwidth = 5; // 31.25 kHz
ChanSet.coding_rate = 4; // = 4/8
ChanSet.spread_factor = 9;
dutyTime = 163.84;
break;
}
case 3: { // very long range
ChanSet.bandwidth = 0; // 125 kHz
ChanSet.coding_rate = 4; // = 4/8
ChanSet.spread_factor = 12;
dutyTime = 327.68;
break;
}
default:{ // default setting is very long range
ChanSet.bandwidth = 0; // 125 kHz
ChanSet.coding_rate = 4; // = 4/8
ChanSet.spread_factor = 12;
dutyTime = 327.68;
}
}
ConfigureRadio( ChanSet );
#ifndef SILENT
MSG("..done! Switch to Receive Mode.\n");
#endif
#ifndef NO_OLED
display.drawString(0,32, "Receive Mode..");
display.display();
#endif
Radio.StartCad( 4 ); // length in symbols
}
void onCheckRadio(void){ noTimer=false; }
// Cycle starts @ 0 symbols. LoRA: CAD for 4 symbols, then (implicitly) Standby MCU: sleep
// After 10 LoRa symbols, wake up MCU and check for IRQs from LoRa (including CADdone)
// If channel activiy detected, switch to RX mode for 500 symbols, to capture very long packages.
// If the package is short, the onRXDone handler will put the LoRa to sleep, so no excess power consumption
// Radio.Send() is non-blocking, so if a TX is running we cannot immediatly start a new CAD, so we wait until LoRa is idle
void loop( )
{
noTimer = true;
TimerSetValue( &CheckRadio, dutyTime ); // MCU sleeps 10 LoRa symbols
TimerStart( &CheckRadio ); // onCheckRadio() will set noTimer to false
while (noTimer) lowPowerHandler( );
Radio.IrqProcess(); // handle events from LoRa, if CAD, set SX1262 to receive (onCadDone)
if ( Radio.GetStatus() == RF_IDLE ) Radio.StartCad( 4 );
}
void onCadDone( bool ChannelActive ){
// Rx Time = 500 * symbol time should be longer than receive time for max. packet length
(ChannelActive) ? Radio.Rx( dutyTime * 50 ) : Radio.Standby();
}
void onRxTimeout( void ){
Radio.Standby();
}
void onTxDone( void )
{
#ifndef NOBLINK
LED.clear( );
LED.show( );
#endif
#ifndef SILENT
MSG(".done (%ims)! Switch to Receive Mode.\n", millis() - startTime );
#endif
#ifndef NO_OLED
sprintf(str,"..done. RX Mode..");
display.drawString(42,53,str);
display.display();
#endif
//Radio.Rx( 0 ); // switch to receive mode
Radio.Standby();
}
void onTxTimeout( void )
{
#ifndef NOBLINK
LED.clear( );
LED.show( );
#endif
#ifndef SILENT
MSG(".failed (TX Timeout)! Switch to Receive Mode.\n");
#endif
#ifndef NO_OLED
sprintf(str,"..timeout!");
display.drawString(42,53,str);
display.display();
#endif
Radio.Standby();
}
void onRxDone( uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr )
{
// if ( !(Radio.GetStatus() == RF_RX_RUNNING) ) Radio.Sleep( );
Radio.Sleep();
if ( size > MAX_PAYLOAD_LENGTH ) size = MAX_PAYLOAD_LENGTH;
if ( !(size > sizeof(PacketHeader)) ) {
#ifndef SILENT
MSG("\nReceived packet! (Size %i bytes, RSSI %i, SNR %i)\n", size, rssi, snr);
MSG("Packet to small (No MeshPacket).\n");
#endif
#ifndef NOBLINK
LED.setPixelColor( 0, RGB_RED ); // send mode
LED.show();
#endif
Radio.Send( payload, size );
Radio.Rx( 0 );
return;
}
PacketHeader * h = (PacketHeader *)payload;
MeshPacket * p = &thePacket;
p->to = h->to;
p->from = h->from;
p->id = h->id;
p->hop_limit = h->flags && 0b00000111;
p->want_ack = h->flags && 0b00001000;
p->which_payload = MeshPacket_encrypted_tag;
p->encrypted.size= size - sizeof(PacketHeader);
p->decoded.data.payload.size = p->encrypted.size;
memcpy(p->encrypted.bytes, payload + sizeof(PacketHeader), p->encrypted.size);
#ifndef SILENT
MSG("\nReceived packet! (Size %i bytes, RSSI %i, SNR %i)\n", size, rssi, snr);
MSG("TO: %.2X ", p->to);
MSG(" FROM: %.2X ", p->from);
MSG(" Packet ID: %.2X ", p->id);
MSG(" Flags: WANT_ACK="); MSG((p->want_ack) ? "YES " : "NO ");
MSG(" HOP_LIMIT=%i\n", p->hop_limit);
MSG("Payload:"); for ( int i=0; i < p->encrypted.size; i++ ) MSG(" %.2X", p->encrypted.bytes[i]);
MSG("\n");
#endif
#ifndef NO_OLED
display.clear();
display.display();
display.setFont(ArialMT_Plain_10);
sprintf(str,"Size: %i RSSI %i SNR %i", size, rssi, snr);
display.drawString(0,0,str);
sprintf(str,"%X", p->to);
display.drawString(0,11,"TO:");
display.drawString(40,11,str);
sprintf(str,"%X", p->from);
display.drawString(0,22,"FROM:");
display.drawString(40,22,str);
sprintf(str,"%X", p->id);
display.drawString(0,32,"ID:");
display.drawString(40,32,str);
display.display();
#endif
if ( !(lastreceivedID == thePacket.id) ){
// will repeat package
lastreceivedID = thePacket.id;
#ifndef NO_OLED
sprintf(str,"Sending..");
display.drawString(0,53,str);
display.display();
#endif
#ifndef NOBLINK
LED.setPixelColor( 0, RGB_RED ); // send mode
LED.show();
#endif
#ifndef SILENT
MSG("Sending packet.. (Size: %i)..", size);
startTime = millis();
#endif
Radio.Send( payload, size );
}
else{
#ifndef SILENT
MSG("PacketID = last PacketID, will not repeat again.\n");
#endif
#ifndef NO_OLED
sprintf(str,"ID known!");
display.drawString(0,53,str);
display.display();
#endif
Radio.Standby();
}
}
// 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; // hash * 33 + c //
return hash;
}
void ConfigureRadio( ChannelSettings ChanSet )
{
uint32_t freq = (regions[REGION].freq + regions[REGION].spacing * ChanSet.channel_num)*1E6;
#ifndef SILENT
MSG("\nRegion is: %s", regions[REGION].name);
MSG(" TX power: %i\n", ChanSet.tx_power);
MSG("Setting frequency to %i Hz (meshtastic channel %i) .. \n",freq,ChanSet.channel_num );
MSG("Channel name is: %s .. \n", ChanSet.name );
MSG("Setting bandwidth to index %i ..\n",ChanSet.bandwidth);
MSG("Setting CodeRate to index %i .. \n", ChanSet.coding_rate);
MSG("Setting SpreadingFactor to %i ..\n",ChanSet.spread_factor);
#endif
Radio.SetChannel( freq );
Radio.SetTxConfig( MODEM_LORA, ChanSet.tx_power ,0 , ChanSet.bandwidth, ChanSet.spread_factor, ChanSet.coding_rate,
LORA_PREAMBLE_LENGTH, false, true, false, 0, false, 20000 );
Radio.SetRxConfig( MODEM_LORA, ChanSet.bandwidth, ChanSet.spread_factor, ChanSet.coding_rate, 0, LORA_PREAMBLE_LENGTH,
LORA_SYMBOL_TIMEOUT, false , 0, true, false, 0, false, true );
}
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