142 lines
4.8 KiB
C++
142 lines
4.8 KiB
C++
/* Heltec Automation send communication test example
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*
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* Function:
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* 1. Send data from a CubeCell device over hardware
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* 2. LoRa sending set frequency via serial
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*
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* this example must work with Heltec ESP32 LoRaWAN library:
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* https://github.com/HelTecAutomation/ESP32_LoRaWAN
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* */
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#include <ESP32_LoRaWAN.h>
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#include "Arduino.h"
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uint32_t license[4] = {0x947025A9, 0x7E6C7FE4, 0x943C2CDA, 0xE04CD68B};
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#define RF_FREQUENCY 868000000 // Hz
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#define TX_OUTPUT_POWER 14 // dBm
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#define LORA_BANDWIDTH 0 // [0: 125 kHz,
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// 1: 250 kHz,
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// 2: 500 kHz,
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// 3: Reserved]
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#define LORA_SPREADING_FACTOR 7 // [SF7..SF12]
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#define LORA_CODINGRATE 1 // [1: 4/5,
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// 2: 4/6,
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// 3: 4/7,
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// 4: 4/8]
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#define LORA_PREAMBLE_LENGTH 8 // Same for Tx and Rx
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#define LORA_SYMBOL_TIMEOUT 0 // Symbols
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#define LORA_FIX_LENGTH_PAYLOAD_ON false
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#define LORA_IQ_INVERSION_ON false
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#define RX_TIMEOUT_VALUE 1000
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#define BUFFER_SIZE 30 // Define the payload size here
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char txpacket[BUFFER_SIZE];
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char rxpacket[BUFFER_SIZE];
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static RadioEvents_t RadioEvents;
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double txNumber;
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int16_t rssi,rxSize;
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void DoubleToString( char *str, double double_num,unsigned int len);
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void setup() {
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Serial.begin(115200);
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while (!Serial);
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SPI.begin(SCK,MISO,MOSI,SS);
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Mcu.init(SS,RST_LoRa,DIO0,DIO1,license);
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txNumber=0;
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rssi=0;
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Radio.Init( &RadioEvents );
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Radio.SetChannel( RF_FREQUENCY );
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Radio.SetTxConfig( MODEM_LORA, TX_OUTPUT_POWER, 0, LORA_BANDWIDTH,
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LORA_SPREADING_FACTOR, LORA_CODINGRATE,
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LORA_PREAMBLE_LENGTH, LORA_FIX_LENGTH_PAYLOAD_ON,
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true, 0, 0, LORA_IQ_INVERSION_ON, 3000 );
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}
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uint32_t starttime = 0;
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uint8_t data[128];
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uint8_t dataIndex = 0;
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uint32_t freq = 868000000;
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void loop()
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{
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starttime = millis();
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while( (millis() - starttime ) < 6000 )
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{
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if(Serial.available())
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{
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dataIndex = 0;
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while(Serial.available())
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{
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data[dataIndex++]=Serial.read();
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if(dataIndex == 128)
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{
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break;
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}
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}
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if(dataIndex == 5 && data[3] == '.')
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{
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if( data[0] <= '9' && data[0] >= '0' && data[1] <= '9' && data[1] >= '0' && data[2] <= '9' && data[2] >= '0' && data[4] <= '9' && data[4] >= '0' )
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{
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uint32_t freq = (data[0]-'0')*100*1000000 + (data[1]-'0')*10*1000000+(data[2]-'0')*1000000+(data[4]-'0')*100000;
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Serial.print("Freq set to ");
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// Serial.println(freq);
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Serial.write(data,dataIndex);
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Serial.println("MHz");
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Radio.Sleep();
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Radio.SetChannel( freq );
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Radio.SetTxConfig( MODEM_LORA, TX_OUTPUT_POWER, 0, LORA_BANDWIDTH,
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LORA_SPREADING_FACTOR, LORA_CODINGRATE,
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LORA_PREAMBLE_LENGTH, LORA_FIX_LENGTH_PAYLOAD_ON,
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true, 0, 0, LORA_IQ_INVERSION_ON, 3000 );
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}
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else
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{
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Serial.println("Input Error. Input example : 868.1");
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}
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}
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else
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{
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Serial.println("Input Error. Input example : 868.1");
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}
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}
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}
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txNumber += 0.01;
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sprintf(txpacket,"%s","Hello world number"); //start a package
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// sprintf(txpacket+strlen(txpacket),"%d",txNumber); //add to the end of package
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// DoubleToString(txpacket,txNumber,3); //add to the end of package
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// Serial.printf("\r\nsending packet \"%s\" , length %d\r\n",txpacket, strlen(txpacket));
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// Serial.println( Radio.TimeOnAir(MODEM_LORA, strlen(txpacket)) );
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Radio.Send( (uint8_t *)txpacket, strlen(txpacket) ); //send the package out
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}
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/**
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* @brief Double To String
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* @param str: Array or pointer for storing strings
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* @param double_num: Number to be converted
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* @param len: Fractional length to keep
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* @retval None
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*/
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void DoubleToString( char *str, double double_num,unsigned int len) {
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double fractpart, intpart;
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fractpart = modf(double_num, &intpart);
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fractpart = fractpart * (pow(10,len));
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sprintf(str + strlen(str),"%d", (int)(intpart)); //Integer part
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sprintf(str + strlen(str), ".%d", (int)(fractpart)); //Decimal part
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}
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