192.195.83.130: client/server

2018-01-12T02:33:00Z

client/server

← Older revision		Revision as of 19:33, 11 January 2018
Line 1:		Line 1:
	Connects to specified network with static ip configuration and hosts a basic web page to show current sensor information, you can also query with <code>/data</code> to get a "\|" delimeted plain text version.		Connects to specified network with static ip configuration and hosts a basic web page to show current sensor information, you can also query with <code>/data</code> to get a "\|" delimeted plain text version.

			== MicroPython Client Code ==

			<pre>
			import machine
			import ssd1306
			import socket
			import network
			from time import sleep_ms

			s = network.WLAN(network.STA_IF)

			btn = machine.Pin(0, machine.Pin.IN)

			i2c = machine.I2C(-1, machine.Pin(4), machine.Pin(5))
			oled = ssd1306.SSD1306_I2C(128, 64, i2c)

			oled.text("nubcore (blue)", 0, 0)
			oled.show()

			temp_data = ""

			def http_get(url):
			global temp_data, oled
			oled.fill(0)
			oled.text("Querying...", 0, 0)
			oled.show()
			_, _, host, path = url.split('/', 3)
			addr = socket.getaddrinfo(host, 80)[0][-1]
			s = socket.socket()
			s.connect(addr)
			s.send(bytes('GET /%s HTTP/1.0\r\nHost: %s\r\n\r\n' % (path, host), 'utf8'))
			while True:
			data = s.recv(100)
			if data:
			print(str(data, 'utf8'), end='')
			temp_data = str(data, 'utf8')
			else:
			break
			s.close()

			def updateTemp():
			global temp_data, oled
			#http_get("http://10.20.0.77/data")
			http_get("http://10.10.10.222/data")
			oled.fill(0)
			oled.text(temp_data, 0, 0)
			oled.show()

			def main():
			global btn, oled, temp_data
			while 1:
			if btn.value() == 0:
			# do button
			updateTemp()
			sleep_ms(10)

			main()
			</pre>


			== Arduino Server Code ==

	<pre>		<pre>

Ⅹ: temp

2018-01-12T01:23:30Z

temp

New page

Connects to specified network with static ip configuration and hosts a basic web page to show current sensor information, you can also query with <code>/data</code> to get a "|" delimeted plain text version.

<pre>
// DHT code adapted from code written by ladyada, public domain

#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>

#include "DHT.h"

#define DHTPIN 5 // sensor data pin D1 == 5
#define DHTTYPE DHT22 // DHT 22 (AM2302), AM2321

const char* ssid = "nubnano";
const char* password = "1234567890";
const String esp-name = "blue-esp";

IPAddress ip(10, 10, 10, 222);
IPAddress gateway(10, 10, 10, 1);
IPAddress subnet(255, 255, 255, 0);

ESP8266WebServer server(80);

const int led = 13;

// DHT Params
DHT dht(DHTPIN, DHTTYPE);
unsigned long nextTime = 1;

float humidity = dht.readHumidity();
float celsius = dht.readTemperature();
float fahrenheit = dht.readTemperature(true);

void handleRoot() {
String response = "";

digitalWrite(led, 1);

response += "Humidity: " + String(humidity) + "%<br/>";
response += "Temperature: " + String(celsius) + "C/" + String(fahrenheit) + "F<br/>";
response += "Garden Mesh sensor node";
server.send(200, "text/html", response);

digitalWrite(led, 0);
}

void handleData() {
String response = "";

digitalWrite(led, 1);

response += String(humidity) + "|";
response += String(celsius) + "|" + String(fahrenheit);
server.send(200, "text/plain", response);

digitalWrite(led, 0);
}

void handleNotFound(){
digitalWrite(led, 1);
String message = "File Not Found\n\n";
message += "URI: ";
message += server.uri();
message += "\nMethod: ";
message += (server.method() == HTTP_GET)?"GET":"POST";
message += "\nArguments: ";
message += server.args();
message += "\n";
for (uint8_t i=0; i<server.args(); i++){
message += " " + server.argName(i) + ": " + server.arg(i) + "\n";
}
server.send(404, "text/plain", message);
digitalWrite(led, 0);
}

void setup(void){
pinMode(led, OUTPUT);
digitalWrite(led, 0);
Serial.begin(115200);

WiFi.config(ip, gateway, subnet);
WiFi.begin(ssid, password);

Serial.println("");

// Wait for connection
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.print("Connected to ");
Serial.println(ssid);
Serial.print("IP address: ");
Serial.println(WiFi.localIP());

if (MDNS.begin(esp-name)) {
Serial.println("MDNS responder started");
MDNS.addService("http", "tcp", 80);
}

server.on("/", handleRoot);

server.on("/data", handleData);

server.on("/inline", [](){
server.send(200, "text/plain", "this works as well");
});

server.onNotFound(handleNotFound);

server.begin();
Serial.println("HTTP server started");

Serial.println("Initialize DHT22 Sensor");
dht.begin();
}

void sampleDHT() {
humidity = dht.readHumidity();
celsius = dht.readTemperature();
fahrenheit = dht.readTemperature(true);

// Check if any reads failed and exit early (to try again).
if (isnan(humidity) || isnan(celsius) || isnan(fahrenheit)) {
Serial.println("Failed to read from DHT sensor!");
return;
}

nextTime = millis() + 2000;
}

void loop(void) {
server.handleClient();

if (millis() > nextTime)
sampleDHT();
}
</pre>

DHT22 - Revision history

192.195.83.130: client/server

Ⅹ: temp