{"id":130,"date":"2015-01-12T08:10:01","date_gmt":"2015-01-12T08:10:01","guid":{"rendered":"http:\/\/parablog-wordpress.dockerbox.rei.moe\/?p=130"},"modified":"2015-01-12T08:15:44","modified_gmt":"2015-01-12T08:15:44","slug":"easyiot-ds18b20-temperature-sensor-esp8266","status":"publish","type":"post","link":"https:\/\/blog.lewys.eu\/?p=130","title":{"rendered":"EasyIoT DS18B20 Temperature Sensor – ESP8266"},"content":{"rendered":"

I needed a temperature node, but I didn’t have a DHT22 temp\/humidity sensor!?<\/p>\n

So I modified the example sketch for the DHT to use a DS18B20 Digital Temperature Sensor instead!<\/p>\n

It works great!<\/p>\n

The sensor is connected as shown here:<\/p>\n

http:\/\/www.hobbytronics.co.uk\/ds18b20-arduino<\/p>\n

Heres the code:<\/p>\n

 <\/p>\n

\/*<\/p>\n

DS18B20 Digital Sensor Node Sketch for EasyIoT Server
\nModified by Lewys Martin <l@lewys.eu>
\nSee: blog.lewys.eu for details<\/p>\n

Original Code:
\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<\/p>\n

V1.0 – first version<\/p>\n

Created by Igor Jarc <igor.jarc1@gmail.com>
\nSee http:\/\/iot-playground.com for details
\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<\/p>\n

This program is free software; you can redistribute it and\/or
\nmodify it under the terms of the GNU General Public License
\nversion 2 as published by the Free Software Foundation.
\n*\/
\n#include <Esp8266EasyIoT.h>
\n#include <SoftwareSerial.h>
\n#include <DallasTemperature.h>
\n#include <OneWire.h><\/p>\n

#define CHILD_ID_TEMP 1
\n#define SENSOR_DIGITAL_PIN 2
\nEsp8266EasyIoT esp;<\/p>\n

SoftwareSerial serialEsp(10, 11);<\/p>\n

OneWire oneWire(SENSOR_DIGITAL_PIN);
\nDallasTemperature sensors(&oneWire);<\/p>\n

float lastTemp;<\/p>\n

Esp8266EasyIoTMsg msgTemp(CHILD_ID_TEMP, V_TEMP);
\nvoid setup()
\n{
\nserialEsp.begin(9600);
\nSerial.begin(115200);<\/p>\n

Serial.println(“EasyIoTEsp init”);
\nesp.begin(NULL, 3, &serialEsp, &Serial);
\n\/\/esp.begin(NULL, &serialEsp);
\nesp.present(CHILD_ID_TEMP, S_TEMP);<\/p>\n

sensors.begin();
\n}<\/p>\n

void loop()
\n{
\nwhile(!esp.process());<\/p>\n

sensors.requestTemperatures();
\nfloat temperature = (sensors.getTempCByIndex(0));
\nif (isnan(temperature)) {
\nSerial.println(“Failed reading temperature from sensor”);
\n}
\nelse if (temperature != lastTemp)
\n{
\nlastTemp = temperature;
\nesp.send(msgTemp.set(temperature, 1));
\nSerial.print(“T: “);
\nSerial.println(temperature);
\n}
\n}<\/p>\n

And some pictures:
\n\"image\"<\/a> <\/p>\n

\"image\"<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

I needed a temperature node, but I didn’t have a DHT22 temp\/humidity sensor!? So I modified the example sketch for the DHT to use a DS18B20 Digital Temperature Sensor instead! It works great! The sensor is connected as shown here: http:\/\/www.hobbytronics.co.uk\/ds18b20-arduino Heres the code:   \/* DS18B20 Digital Sensor Node Sketch for EasyIoT Server Modified … Continue reading EasyIoT DS18B20 Temperature Sensor – ESP8266<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20,23,19,18],"tags":[],"class_list":["post-130","post","type-post","status-publish","format-standard","hentry","category-arduino-2","category-esp8266","category-home-automation-2","category-projects"],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/blog.lewys.eu\/index.php?rest_route=\/wp\/v2\/posts\/130","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.lewys.eu\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.lewys.eu\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.lewys.eu\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.lewys.eu\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=130"}],"version-history":[{"count":2,"href":"https:\/\/blog.lewys.eu\/index.php?rest_route=\/wp\/v2\/posts\/130\/revisions"}],"predecessor-version":[{"id":134,"href":"https:\/\/blog.lewys.eu\/index.php?rest_route=\/wp\/v2\/posts\/130\/revisions\/134"}],"wp:attachment":[{"href":"https:\/\/blog.lewys.eu\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=130"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.lewys.eu\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=130"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.lewys.eu\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=130"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}