2 HTCC-AB01 for a simple P2P connection

begraf · March 22, 2021, 12:40pm

Hallo, I want to use two HTCC-AB01 for a simple peer to peer connection.
Can somebody provide me a simpel code?
Where can I get the Library LoRaWan_App.h?
Greetings begraf

jasonXu · March 23, 2021, 6:47am

hi,

please refer the links:
Project folder:

pingpong code:

LoRaWan_App.h:

arit · March 26, 2021, 9:05am

This is my initial test code for HTCC-AM02. I use PlatformIO as development environment. #define TX for transmitter and #define RX for receiver. I guess it works also with HTCC-AB01.


#include "LoRaWan_APP.h"
#include "Arduino.h"

#define TX
//#define RX

#define RF_FREQUENCY                  868000000 // Hz
#define TX_OUTPUT_POWER               14        // dBm
#define LORA_BANDWIDTH                0         // [0: 125 kHz]
#define LORA_SPREADING_FACTOR         7         // [SF7]
#define LORA_CODINGRATE               4         // [4: 4/8]
#define LORA_PREAMBLE_LENGTH          8         // Same for Tx and Rx
#define LORA_SYMBOL_TIMEOUT           0         // Symbols
#define LORA_FIX_LENGTH_PAYLOAD_ON    1
#define LORA_IQ_INVERSION_ON          0
#define FDEV                          0         // LoRa: always 0
#define BAND_WIDTH_AFC                0         // LoRa: always 0
#define CRC_ON                        0
#define FREQ_HOP_ON                   0
#define HOP_PERIOD                    0
#define LORA_RX_CONTINOUS             0
#define LORA_SYNC_WORD                0x12
#define RX_TIMEOUT_VALUE              1000
#define TX_TIMEOUT_VALUE              3000
#define BUFFER_SIZE                   2 

int16_t txNumber;
bool packetSent     = false;
bool rxTimeout      = false;
bool packetReceived = false;

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 OnRxTimeout(void);

void setup() 
{
    boardInitMcu();
    Serial.begin(115200);

    txNumber = 0;
    RadioEvents.TxDone    = OnTxDone;
    RadioEvents.TxTimeout = OnTxTimeout;
    RadioEvents.RxDone    = OnRxDone;
    RadioEvents.RxTimeout = OnRxTimeout;

    Radio.Init(&RadioEvents);
    Radio.SetChannel(RF_FREQUENCY);
    Radio.SetSyncWord(LORA_SYNC_WORD);
    Radio.SetPublicNetwork(false);
    Radio.SetTxConfig(MODEM_LORA, TX_OUTPUT_POWER, FDEV, LORA_BANDWIDTH,
                      LORA_SPREADING_FACTOR, LORA_CODINGRATE,
                      LORA_PREAMBLE_LENGTH, LORA_FIX_LENGTH_PAYLOAD_ON,
                      CRC_ON, FREQ_HOP_ON, HOP_PERIOD, LORA_IQ_INVERSION_ON, TX_TIMEOUT_VALUE);

    Radio.SetRxConfig(MODEM_LORA, LORA_BANDWIDTH, LORA_SPREADING_FACTOR,
                      LORA_CODINGRATE, BAND_WIDTH_AFC, LORA_PREAMBLE_LENGTH,
                      LORA_SYMBOL_TIMEOUT, LORA_FIX_LENGTH_PAYLOAD_ON, BUFFER_SIZE,
                      CRC_ON, FREQ_HOP_ON, HOP_PERIOD, LORA_IQ_INVERSION_ON, LORA_RX_CONTINOUS);
}

void loop()
{
  uint8_t bufPayload[BUFFER_SIZE], len;

#ifdef TX
  txNumber++;
  bufPayload[0] = 0xAA; bufPayload[1] = 0xBB; len = BUFFER_SIZE;
  Serial.printf("\r\nTx packet #%d: [%02X] [%02X] len=%d",txNumber, bufPayload[0], bufPayload[1], len);

  packetSent = false;

  Radio.Send(bufPayload, len);
  do {
    Radio.IrqProcess();
  } while(!packetSent);

  delay(500);
#endif

#ifdef RX
  rxTimeout      = false;
  packetReceived = false;

  Radio.Rx(RX_TIMEOUT_VALUE);  // set radio to continuous reception mode
  while (!packetReceived) {
    Radio.IrqProcess();
    if (rxTimeout) break;     // 1000 ms rx window in use => if no rx go further only every 1000 ms
  }
#endif
} // end loop()

void OnTxDone( void )
{
  Serial.printf("\r\nTX #%d done.\r\n", txNumber);
  packetSent = true;
}

void OnTxTimeout( void )
{
  Serial.printf("\r\n TX #%d Timeout...\r\n", txNumber);
  packetSent = true;
}

void OnRxDone(uint8_t *payload, uint16_t size, int16_t rssi, int8_t snr)
{
  //memcpy(RxPacket, payload, BUFFER_SIZE);
  Serial.printf(" <RX done ");
  Serial.printf("\r\n <RxDone [%02X] [%02X] RSSI/SNR %d/%d, len=%d\r\n", payload[0], payload[1], rssi, snr, size);

  rxTimeout      = false;
  packetReceived = true;
}

void OnRxTimeout(void)
{
  Serial.println(" <RX Timeout.");
  rxTimeout  = true;
}

jasonXu · March 26, 2021, 9:26am

yes, the anwser is Yes.

begraf · March 26, 2021, 10:20am

The Pingpongs code, which I got. is working fine.

Now I have to add the deep sleep function.
Can I merge the two examples?

Thanks for your support

begraf · March 28, 2021, 4:55pm

I want to send sensor datas every hour in a P2P Mode. I use twoHTCC-AB01.
Due to your support I can send LoRa datas with the code out of the CubeCell examples and I have the LowPower_WakeUpByTimer code running.
If I mix the two codes, the sleep Funktion is not working any more:

See code

Heltec Automation Send communication test example
*

Function:
1. Send data from a CubeCell device over hardware
this project also realess in GitHub:
https://github.com/HelTecAutomation/ASR650x-Arduino
*/

#include “LoRaWan_APP.h”
#include “Arduino.h”

/*

set LoraWan_RGB to 1,the RGB active in loraWan
RGB red means sending;
RGB green means received done;
*/
#ifndef LoraWan_RGB
#define LoraWan_RGB 0
#endif

#define RF_FREQUENCY 868400000 // Hz

#define TX_OUTPUT_POWER 14 // dBm

#define LORA_BANDWIDTH 0 // [0: 125 kHz,
// 1: 250 kHz,
// 2: 500 kHz,
// 3: Reserved]
#define LORA_SPREADING_FACTOR 7 // [SF7…SF12]
#define LORA_CODINGRATE 1 // [1: 4/5,
// 2: 4/6,
// 3: 4/7,
// 4: 4/8]
#define LORA_PREAMBLE_LENGTH 8 // 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 RX_TIMEOUT_VALUE 1000
#define BUFFER_SIZE 30 // Define the payload size here

char txpacket[BUFFER_SIZE];
char rxpacket[BUFFER_SIZE];

static RadioEvents_t RadioEvents;

double txNumber;

int16_t rssi,rxSize;
void DoubleToString( char *str, double double_num,unsigned int len);

/*

part wake up
*/
#define timetillsleep 5000
#define timetillwakeup 50000
static TimerEvent_t sleep;
static TimerEvent_t wakeUp;
uint8_t lowpower=1;

void onSleep()
{
Serial.printf(“Going into lowpower mode, %d ms later wake up.\r\n”,timetillwakeup);
lowpower=1;
//timetillwakeup ms later wake up;
TimerSetValue( &wakeUp, timetillwakeup );
TimerStart( &wakeUp );
}
void onWakeUp()
{
Serial.printf(“Woke up, %d ms later into lowpower mode.\r\n”,timetillsleep);
lowpower=0;
//timetillsleep ms later into lowpower mode;
TimerSetValue( &sleep, timetillsleep );
TimerStart( &sleep );
}

void setup() {
boardInitMcu( );
Serial.begin(115200);

txNumber=0;
rssi=0;

Radio.Init( &RadioEvents );
Radio.SetChannel( RF_FREQUENCY );
Radio.SetTxConfig( MODEM_LORA, TX_OUTPUT_POWER, 0, LORA_BANDWIDTH,
                               LORA_SPREADING_FACTOR, LORA_CODINGRATE,
                               LORA_PREAMBLE_LENGTH, LORA_FIX_LENGTH_PAYLOAD_ON,
                               true, 0, 0, LORA_IQ_INVERSION_ON, 3000 );

/*

part wake up
*/
Radio.Sleep( );
TimerInit( &sleep, onSleep );
TimerInit( &wakeUp, onWakeUp );
onSleep();
}

void loop()
{

delay(1000);
txNumber += 0.01;
sprintf(txpacket,"%s",“Hello world number”); //start a package
// sprintf(txpacket+strlen(txpacket),"%d",txNumber); //add to the end of package

DoubleToString(txpacket,txNumber,3); //add to the end of package

turnOnRGB(COLOR_SEND,0); //change rgb color

Serial.printf("\r\nsending packet “%s” , length %d\r\n",txpacket, strlen(txpacket));

Radio.Send( (uint8_t *)txpacket, strlen(txpacket) ); //send the package out

}
/**

@brief Double To String
@param str: Array or pointer for storing strings
@param double_num: Number to be converted
@param len: Fractional length to keep
@retval None
*/
void DoubleToString( char *str, double double_num,unsigned int len) {
double fractpart, intpart;
fractpart = modf(double_num, &intpart);
fractpart = fractpart * (pow(10,len));
sprintf(str + strlen(str),"%d", (int)(intpart)); //Integer part
sprintf(str + strlen(str), “.%d”, (int)(fractpart)); //Decimal part

if(lowpower){
//note that lowPowerHandler() runs six times before the mcu goes into lowpower mode;
lowPowerHandler();
}
}

can somebody support me?

Thanks

jasonXu · March 29, 2021, 9:33am

YES, you can refer the factory test code:

it is including:RGB test + pingpong test + external OLED test + lowpower test(Use USE_KEYS enter the lowpower mode)

begraf · March 30, 2021, 6:52pm

Thanks for the Information!!
Can you explain more in Detail, what I should do with “USE_KEYS” ?

begraf

jasonXu · March 31, 2021, 2:34am

begraf · April 16, 2021, 12:36pm

Hi,

today I want to share the code of my project with you:

P2P Communication with two CubeCellHTCC AB01.
They exchange the information of a distance, measured by an Ultrasonic sensor and the Vortage of the battery.
Comments are welcome.

/*

Heltec Automation
Function:
1. Measure a distance with a US sensor DYP A06-V1.1 similar to HC SR04
1. Send data from a CubeCell to another CubeCell
1. Measure voltage
1. go for 1 min in Sleep
  */

#include “LoRaWan_APP.h”
#include “Arduino.h”
int txNumber=0;
long dauer=0;
int voltage =0;
// Hier wird die Zeitdauer abgespeichert die die Ultraschallwelle braucht
long entfernung=0; // Hier wird die Entfernung vom Hindernis abgespeichert
int i=0;

/*

set LoraWan_RGB to 1,the RGB active in loraWan
RGB red means sending;
RGB green means received done;
*/
#ifndef LoraWan_RGB
#define LoraWan_RGB 0
#endif

#define RF_FREQUENCY 868400000 // Hz

#define TX_OUTPUT_POWER 20 // dBm

#define LORA_BANDWIDTH 0 // [0: 125 kHz,
// 1: 250 kHz,
// 2: 500 kHz,
// 3: Reserved]
#define LORA_SPREADING_FACTOR 7 // [SF7…SF12]
#define LORA_CODINGRATE 1 // [1: 4/5,
// 2: 4/6,
// 3: 4/7,
// 4: 4/8]
#define LORA_PREAMBLE_LENGTH 8 // 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 RX_TIMEOUT_VALUE 1000
#define BUFFER_SIZE 30 // Define the payload size here

char txpacket[BUFFER_SIZE];
char rxpacket[BUFFER_SIZE];

static RadioEvents_t RadioEvents;

int16_t rssi,rxSize;
void DoubleToString( char *str, double double_num,unsigned int len);

#define timetillsleep 1000
#define timetillwakeup 60000
static TimerEvent_t sleep;
static TimerEvent_t wakeUp;
uint8_t lowpower=1;

void onSleep()
{

lowpower=1;
//timetillwakeup ms later wake up;
TimerSetValue( &wakeUp, timetillwakeup );
TimerStart( &wakeUp );
}

void onWakeUp()
{
txNumber ++;
i=0;

sprintf(txpacket,"XXX");  //start a package
sprintf(txpacket+strlen(txpacket),"  %d",voltage);
sprintf(txpacket+strlen(txpacket),"  %d",dauer);
sprintf(txpacket+strlen(txpacket),"  %d",txNumber);

// sprintf(txpacket+strlen(txpacket),"%d",txNumber); //add to the end of package

turnOnRGB(COLOR_SEND,0); //change rgb color

Radio.Send( (uint8_t *)txpacket, strlen(txpacket) ); //send the package out

lowpower=0;
//timetillsleep ms later into lowpower mode;
TimerSetValue( &sleep, timetillsleep );
TimerStart( &sleep );
}

void setup() {
pinMode(GPIO1, OUTPUT); // Trigger Pin als Ausgang definieren
pinMode(GPIO2, INPUT); // Echo Pin als Eingang defnieren

boardInitMcu( );
  
rssi=0;

Radio.Init( &RadioEvents );
Radio.SetChannel( RF_FREQUENCY );
Radio.SetTxConfig( MODEM_LORA, TX_OUTPUT_POWER, 0, LORA_BANDWIDTH,
                               LORA_SPREADING_FACTOR, LORA_CODINGRATE,
                               LORA_PREAMBLE_LENGTH, LORA_FIX_LENGTH_PAYLOAD_ON,
                               true, 0, 0, LORA_IQ_INVERSION_ON, 3000 );

Radio.Sleep( );
TimerInit( &sleep, onSleep );
TimerInit( &wakeUp, onWakeUp );
onSleep();

Serial.printf("\r\nsending packet “%s” , length %d\r\n",txpacket, strlen(txpacket));

}
void loop()
{
i=(i+1);
if (i<3)
{
digitalWrite(GPIO1, LOW); // Den Trigger auf LOW setzen
delay(20); // 20 Millisekunden warten
digitalWrite(GPIO1, HIGH); // Den Trigger auf HIGH setzen
delay(20); // 20 Millisekunden warten
digitalWrite(GPIO1, LOW); // Trigger auf LOW setzen
dauer = pulseIn(GPIO2, HIGH); // Die Zeit messen bis die Ultraschallwelle zurückkommt

uint16_t voltage = getBatteryVoltage();

}
if(lowpower){

turnOffRGB();
//note that lowPowerHandler() runs six times before the mcu goes into lowpower mode;
lowPowerHandler();

}

begraf · April 16, 2021, 5:45pm

additional Moment, if you want to reach 7uA in Sleep modus including LoRa:

put in Radio.Sleep () in the void onSleep():

void onSleep()
{

lowpower=1;
//timetillwakeup ms later wake up;
Radio.Sleep( );
TimerSetValue( &wakeUp, timetillwakeup );
TimerStart( &wakeUp );

}

jasonXu · April 17, 2021, 3:03am

Thanks for your sharing!

begraf · May 26, 2021, 7:35am

Hi,

I use a CubeCell AB01 to collect Ultrasonic datas and send them each 30 min.
This is working fine with 7uA in the sleep mode.

#define timetillsleep 1000
#define timetillwakeup 3600000

Now I want to extend the sleeping period to 60 min. This doesn’t work.
Where is the mistake?

Thanks for supporting me!