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i am trying to decode the below sketch to integrate TTNv3 to thingspeak. can someone help me with this issue #include <lmic.h> #include <dht.h> #include <hal/hal.h> #include <SPI.h> dht DHT; #define DHT11_PIN 5 #define PIN_A A0 float temperature,humidity; float tem,hum; unsigned int count = 1; //For times count String datastring1=""; String datastring2=""; String datastring3=""; static uint8_t mydata[11] = {0x01,0x67,0x00,0x00,0x02,0x68,0x00,0x03,0x65,0x00,0x00}; /* LoRaWAN NwkSKey, network session key This is the default Semtech key, which is used by the prototype TTN network initially. ttn*/ static const PROGMEM u1_t NWKSKEY[16] = { 0x72, 0x13, 0xF8, 0xF0, 0x9A, 0x3C, 0xF9, 0xE5, 0xE6, 0x01, 0xDA,0xAC, 0x32, 0xBA, 0x37 }; /* LoRaWAN AppSKey, application session key This is the default Semtech key, which is used by the prototype TTN network initially. ttn*/ static const u1_t PROGMEM APPSKEY[16] = { 0x2F, 0xF5, 0xF4, 0x08, 0x4E, 0x37, 0x20, 0x02, 0xBA, 0x2B, 0xED, 0x40, 0x24, 0xA2, 0x945 }; /* LoRaWAN end-device address (DevAddr) See http://thethingsnetwork.org/wiki/AddressSpace ttn*/ static const u4_t DEVADDR = 0x260D0CA5; /* These callbacks are only used in over-the-air activation, so they are left empty here (we cannot leave them out completely unless DISABLE_JOIN is set in config.h, otherwise the linker will complain).*/ void os_getArtEui (u1_t* buf) { } void os_getDevEui (u1_t* buf) { } void os_getDevKey (u1_t* buf) { } static osjob_t initjob,sendjob,blinkjob; /* Schedule TX every this many seconds (might become longer due to duty cycle limitations).*/ const unsigned TX_INTERVAL = 10; // Pin mapping const lmic_pinmap lmic_pins = { .nss = 10, .rxtx = LMIC_UNUSED_PIN, .rst = 9, .dio = {2, 6, 7}, }; void do_send(osjob_t* j){ // Check if there is not a current TX/RX job running if (LMIC.opmode & OP_TXRXPEND) { Serial.println("OP_TXRXPEND, not sending"); } else { dhtTem(); light(); // Prepare upstream data transmission at the next possible time. // LMIC_setTxData2(1,datasend,sizeof(datasend)-1,0); LMIC_setTxData2(1, mydata, sizeof(mydata), 0); Serial.println("Packet queued"); Serial.print("LMIC.freq:"); Serial.println(LMIC.freq); Serial.println("Receive data:"); } // Next TX is scheduled after TX_COMPLETE event. } void onEvent (ev_t ev) { Serial.print(os_getTime()); Serial.print(": "); Serial.println(ev); switch(ev) { case EV_SCAN_TIMEOUT: Serial.println(F("EV_SCAN_TIMEOUT")); break; case EV_BEACON_FOUND: Serial.println(F("EV_BEACON_FOUND")); break; case EV_BEACON_MISSED: Serial.println(F("EV_BEACON_MISSED")); break; case EV_BEACON_TRACKED: Serial.println(F("EV_BEACON_TRACKED")); break; case EV_JOINING: Serial.println(F("EV_JOINING")); break; case EV_JOINED: Serial.println(F("EV_JOINED")); break; case EV_RFU1: Serial.println(F("EV_RFU1")); break; case EV_JOIN_FAILED: Serial.println(F("EV_JOIN_FAILED")); break; case EV_REJOIN_FAILED: Serial.println(F("EV_REJOIN_FAILED")); break; case EV_TXCOMPLETE: Serial.println(F("EV_TXCOMPLETE (includes waiting for RX windows)")); if(LMIC.dataLen) { // data received in rx slot after tx Serial.print(F("Data Received: ")); Serial.write(LMIC.frame+LMIC.dataBeg, LMIC.dataLen); Serial.println(); } // Schedule next transmission os_setTimedCallback(&sendjob, os_getTime()+sec2osticks(TX_INTERVAL), do_send); break; case EV_LOST_TSYNC: Serial.println(F("EV_LOST_TSYNC")); break; case EV_RESET: Serial.println(F("EV_RESET")); break; case EV_RXCOMPLETE: // data received in ping slot Serial.println(F("EV_RXCOMPLETE")); break; case EV_LINK_DEAD: Serial.println(F("EV_LINK_DEAD")); break; case EV_LINK_ALIVE: Serial.println(F("EV_LINK_ALIVE")); break; default: Serial.println(F("Unknown event")); break; } } void setup() { // initialize digital pin as an output. Serial.begin(9600); while(!Serial); Serial.println("Connect to TTN and Send data to mydevice(Use DHT11 Sensor):"); #ifdef VCC_ENABLE // For Pinoccio Scout boards pinMode(VCC_ENABLE, OUTPUT); digitalWrite(VCC_ENABLE, HIGH); delay(1000); #endif // LMIC init os_init(); // Reset the MAC state. Session and pending data transfers will be discarded. LMIC_reset(); /*LMIC_setClockError(MAX_CLOCK_ERROR * 1/100); Set static session parameters. Instead of dynamically establishing a session by joining the network, precomputed session parameters are be provided.*/ #ifdef PROGMEM /* On AVR, these values are stored in flash and only copied to RAM once. Copy them to a temporary buffer here, LMIC_setSession will copy them into a buffer of its own again.*/ uint8_t appskey[sizeof(APPSKEY)]; uint8_t nwkskey[sizeof(NWKSKEY)]; memcpy_P(appskey, APPSKEY, sizeof(APPSKEY)); memcpy_P(nwkskey, NWKSKEY, sizeof(NWKSKEY)); LMIC_setSession (0x1, DEVADDR, nwkskey, appskey); #else // If not running an AVR with PROGMEM, just use the arrays directly LMIC_setSession (0x1, DEVADDR, NWKSKEY, APPSKEY); #endif for (int channel=0; channel<8; ++channel) { LMIC_disableChannel(channel); } for (int channel=16; channel<72; ++channel) { LMIC_disableChannel(channel); } // Disable link check validation LMIC_setLinkCheckMode(0); // TTN uses SF9 for its RX2 window. LMIC.dn2Dr = DR_SF9; // Set data rate and transmit power (note: txpow seems to be ignored by the library) LMIC_setDrTxpow(DR_SF7,14); // Start job do_send(&sendjob); } void dhtTem() { int16_t tem1; temperature = DHT.read11(DHT11_PIN); //Temperature detection tem = DHT.temperature*1.0; float humidity = DHT.read11(DHT11_PIN); float hum = DHT.humidity* 1.0; Serial.print(F("########### ")); Serial.print(F("NO.")); Serial.print(count); Serial.println(F(" ###########")); Serial.println(F("The temperautre and humidity :")); Serial.print(F("[")); Serial.print(tem); Serial.print(F("℃")); Serial.print(F(",")); Serial.print(hum); Serial.print(F("%")); Serial.print(F("]")); Serial.println(""); count++; tem1=(tem*10); mydata[2] = tem1>>8; mydata[3]= tem1; mydata[6] = hum * 2; } void light(){ int16_t lux; int val,val1; val=analogRead(PIN_A); // Serial.print(F("a:")); //Serial.println(val); delay(500); val1=val*1.0; lux=val1; mydata[9]=lux>>8; mydata[10]=lux; //Serial.print(lux); } void loop() { os_runloop_once(); } payload decoder on TTN See <https://www.youtube.com/watch?v=b9Ga4nwnsTM this video> for some suggestions. What have you tried so far? What are you seeing? thank you, I tried the following decoder. i think I am reading the byte wrong function Decoder(bytes, port) { var tem = (bytes[2]<<8) | bytes[3]; var hum = (bytes[6])*2; return { field3: tem, field4: hum } } payload decode ttn thingspeak