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  • LoRa_Shield_Sketch_For_MQTT.ino

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LoRa_Shield_Sketch_For_MQTT.ino

Author

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	1	+XWiki.Kilight

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	1	+2.9 KB

Content

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	1	+#include <SPI.h>
	2	+#include <LoRa.h>
	3	+
	4	+// This is the LoRa Node side sketch for the MQTT example: http://wiki.dragino.com/index.php?title=MQTT_Forward_Instruction#Example_to_communicate_to_a_simple_MQTT_server
	5	+
	6	+float tem,hum;
	7	+char tem_1[8]={"\0"},hum_1[8]={"\0"};
	8	+char *node_id = "<4567>"; //From LG01 via web Local Channel settings on MQTT.Please refer <> dataformat in here.
	9	+uint8_t datasend[36];
	10	+unsigned int count = 1;
	11	+unsigned long new_time,old_time=0;
	12	+
	13	+void setup()
	14	+{
	15	+ Serial.begin(9600);
	16	+ while (!Serial);
	17	+ Serial.println(F("Start MQTT Example"));
	18	+ if (!LoRa.begin(868100000)) //868000000 is frequency
	19	+ {
	20	+ Serial.println("Starting LoRa failed!");
	21	+ while (1);
	22	+ }
	23	+ // Setup Spreading Factor (6 ~ 12)
	24	+ LoRa.setSpreadingFactor(12);
	25	+
	26	+ // Setup BandWidth, option: 7800,10400,15600,20800,31250,41700,62500,125000,250000,500000
	27	+ //Lower BandWidth for longer distance.
	28	+ LoRa.setSignalBandwidth(125000);
	29	+
	30	+ // Setup Coding Rate:5(4/5),6(4/6),7(4/7),8(4/8)
	31	+ LoRa.setCodingRate4(5);
	32	+ LoRa.setSyncWord(0x12);
	33	+ void disableCrc();
	34	+ LoRa.disableInvertIQ();
	35	+ LoRa.explicitHeaderMode();
	36	+ Serial.println("LoRa init succeeded.");
	37	+ LoRa.onReceive(onReceive);
	38	+ LoRa.receive();
	39	+}
	40	+
	41	+void dhtTem()
	42	+{
	43	+ tem = random(15,40);
	44	+ hum = random(40,80);
	45	+ Serial.println(F("The temperature and humidity:"));
	46	+ Serial.print("[");
	47	+ Serial.print(tem);
	48	+ Serial.print("℃");
	49	+ Serial.print(",");
	50	+ Serial.print(hum);
	51	+ Serial.print("%");
	52	+ Serial.print("]");
	53	+ Serial.println("");
	54	+}
	55	+void dhtWrite()
	56	+{
	57	+ char data[50] = "\0";
	58	+ //for(int i = 0; i < 50; i++)
	59	+ //{
	60	+ // data[i] = node_id[i];
	61	+ //}
	62	+
	63	+ dtostrf(tem,0,1,tem_1);
	64	+ dtostrf(hum,0,1,hum_1);
	65	+
	66	+ // Serial.println(tem_1);
	67	+ strcat(data,"tem=");
	68	+ strcat(data,tem_1);
	69	+ strcat(data,"&hum=");
	70	+ strcat(data,hum_1);
	71	+ strcpy((char *)datasend,data);
	72	+
	73	+ //Serial.println((char *)datasend);
	74	+ //Serial.println(sizeof datasend);
	75	+
	76	+}
	77	+
	78	+
	79	+void SendData()
	80	+{
	81	+ LoRa.beginPacket();
	82	+ LoRa.print((char *)datasend);
	83	+ LoRa.endPacket();
	84	+ Serial.println("Packet Sent");
	85	+}
	86	+
	87	+
	88	+
	89	+void loop()
	90	+{
	91	+ new_time=millis();
	92	+ if (new_time - old_time >= 30000 || old_time == 0)
	93	+ {
	94	+ old_time = new_time;
	95	+ Serial.print("########### ");
	96	+ Serial.print("COUNT=");
	97	+ Serial.print(count);
	98	+ Serial.println(" ###########");
	99	+ count++;
	100	+ dhtTem();
	101	+ dhtWrite();
	102	+ SendData();
	103	+ LoRa.receive();
	104	+ }
	105	+}
	106	+
	107	+void onReceive(int packetSize) {
	108	+
	109	+ // received a packet
	110	+ Serial.print("Received packet : ");
	111	+
	112	+ // read packet
	113	+ for (int i = 0; i < packetSize; i++) {
	114	+ Serial.print((char)LoRa.read());
	115	+ }
	116	+ Serial.print("\n\r");
	117	+}
	118	+