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  • Log-Temperature-Sensor-and-send-data-to-Node-red.ino
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Log-Temperature-Sensor-and-send-data-to-Node-red.ino

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1		-XWiki.Kilight

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1		-#include <SoftwareSerial.h>
2		-#include <Adafruit_Sensor.h>
3		-#include <DHT.h>
4		-#include <DHT_U.h>
5		-/*
6		-
7		-*/
8		-#define DHTPIN 8 // Digital pin connected to the DHT sensor
9		-#define DHTTYPE DHT11 // DHT 11
10		-DHT_Unified dht(DHTPIN, DHTTYPE);
11		-
12		-String inputString = ""; // a String to hold incoming data
13		-bool stringComplete = false; // whether the string is complete
14		-
15		-long old_time=millis();
16		-long new_time;
17		-
18		-long uplink_interval=30000; //ms
19		-
20		-float DHT11_temp;
21		-float DHT11_hum;
22		-
23		-SoftwareSerial ss(10, 11); // Arduino RX, TX ,
24		-
25		-char rxbuff[128];
26		-uint8_t rxbuff_index=0;
27		-
28		-void setup() {
29		- // initialize serial
30		- Serial.begin(9600);
31		-
32		- ss.begin(9600);
33		- ss.listen();
34		-
35		- // reserve 200 bytes for the inputString:
36		- inputString.reserve(200);
37		-
38		- dht.begin();
39		- sensor_t sensor;
40		- dht.temperature().getSensor(&sensor);
41		- dht.humidity().getSensor(&sensor);
42		-
43		- ss.println("ATZ");//reset LA66
44		-}
45		-
46		-void loop() {
47		-
48		- while ( ss.available()) {
49		- // get the new byte:
50		- char inChar = (char) ss.read();
51		- // add it to the inputString:
52		- inputString += inChar;
53		-
54		- rxbuff[rxbuff_index++]=inChar;
55		-
56		- if(rxbuff_index>128)
57		- {
58		- rxbuff[rxbuff_index]='\0';
59		- rxbuff_index=0;
60		- break;
61		- }
62		-
63		- // if the incoming character is a newline, set a flag so the main loop can
64		- // do something about it:
65		- if (inChar == '\n' || inChar == '\r') {
66		- stringComplete = true;
67		- rxbuff[rxbuff_index]='\0';
68		- rxbuff_index=0;
69		- }
70		- }
71		-
72		- while ( Serial.available()) {
73		- // get the new byte:
74		- char inChar = (char) Serial.read();
75		- // add it to the inputString:
76		- inputString += inChar;
77		- // if the incoming character is a newline, set a flag so the main loop can
78		- // do something about it:
79		- if (inChar == '\n' || inChar == '\r') {
80		- ss.print(inputString);
81		- inputString = "\0";
82		- }
83		- }
84		-
85		- // print the string when a newline arrives:
86		- if (stringComplete) {
87		- Serial.print(inputString);
88		-
89		- // clear the string:
90		- inputString = "\0";
91		- stringComplete = false;
92		- }
93		-
94		- new_time = millis();
95		-
96		- if(new_time-old_time>=uplink_interval){
97		- old_time = new_time;
98		-
99		- Serial.print(F("\r\n"));
100		- // Get temperature event and print its value.
101		- sensors_event_t event;
102		- dht.temperature().getEvent(&event);
103		- if (isnan(event.temperature)) {
104		- Serial.println(F("Error reading temperature!"));
105		- DHT11_temp=327.67;
106		- }
107		- else {
108		- DHT11_temp=event.temperature;
109		-
110		- if(DHT11_temp>60){
111		- DHT11_temp=60;
112		- }
113		- else if(DHT11_temp<-20){
114		- DHT11_temp=-20;
115		- }
116		- }
117		- // Get humidity event and print its value.
118		- dht.humidity().getEvent(&event);
119		- if (isnan(event.relative_humidity)) {
120		- DHT11_hum=327.67;
121		- Serial.println(F("Error reading humidity!"));
122		- }
123		- else {
124		- DHT11_hum=event.relative_humidity;
125		-
126		- if(DHT11_hum>100){
127		- DHT11_hum=100;
128		- }
129		- else if(DHT11_hum<0){
130		- DHT11_hum=0;
131		- }
132		- }
133		-
134		- Serial.print(F("Temperature: "));
135		- Serial.print(DHT11_temp);
136		- Serial.println(F("°C"));
137		- Serial.print(F("Humidity: "));
138		- Serial.print(DHT11_hum);
139		- Serial.println(F("%"));
140		- Serial.print(F("\r\n"));
141		-
142		- char sensor_data_buff[128]="\0";
143		-
144		- //confirm status,Fport,payload length,payload(HEX)
145		- snprintf(sensor_data_buff,128,"AT+SEND=0,%02X%02X%02X%02X,0,0",(short)(DHT11_temp*100)>>8 & 0xFF,(short)(DHT11_temp*100) & 0xFF,(short)(DHT11_hum*10)>>8 & 0xFF,(short)(DHT11_hum*10) & 0xFF);
146		- ss.print(sensor_data_buff);
147		- ss.print('\r');
148		- }
149		-}
150		-

image-20221108172149-6.png

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1		-XWiki.Kilight

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