In some previous Arduino guide, we used HTTP POST method to upload sensor data. What is HTTP POST? HTTP POST is used to send data to a server to create or update a resource where the URL already existing. In the same way, we used HTTP GET with WordPress, HTTP PUT with OpenStack Swift. First, we need to understand what is HTTP POST, second we need to know basic difference with simillar methods such … [Read more...]
IoT Prototyping : Pushover Ready to Use Android App for Push Notification
A button press sending a push message and email from ESP32 to Android is most wanted project. It is limited by people's abillity to develop Android app. I was finding an easy way for the readers. I re-discovered and tested Pushover with Node-RED on IBM Watson IoT platform. Within 15 minutues with minimum clicks I received beutiful push message from IBM Watson IoT platform with ESP32 HTTP POST on … [Read more...]
Node RED : Replace Payload Message Sent by ESP32 to Text Email (IBM Watson IoT)
So far, we can connect ESP32 to IBM Watson IoT Platform on button press, confifure Node-RED for the purpose to send email alert. But the email body will become like {d: {"aMessage": "11"}}. It is machine readable JSON format. Here is How to Replace the Payload Message Sent by ESP32 to Node RED on IBM Watson IoT to Human Readable Meaningful Text Message. It is very easy. Click-drag the Node … [Read more...]
High Quality ESP32 Development Boards Vs Cheap ESP32 Clones
How High Quality ESP32 Development Boards Vs Cheap ESP32 Clones Comparison Goes? Why Adafruit HUZZAH32 board costs higher than the generic ESP32 boards, like we recently shown some ESP32 projects with? You can simply run a Wi-Fi scan and compare the result with your Wi-Fi scanning capabillity of Samsung smartphone or laptop. Adafruit Huzzah32 Feather is a standard development board with … [Read more...]
What is Network Time Protocol (NTP)
In a previous guide on ESP32, we faced NTP server and Network Time Protocol to get current time for button press event as example. What is Network Time Protocol (NTP)? The Network Time Protocol (NTP) is a standard for synchronizing clocks in computer systems using UDP protocol. NTP is specifically designed to provide reliable time information over variable packet delay networks. In common usage, … [Read more...]
Base64 Encoding on ESP32 Arduino (Base64 for Images)
Base64 images are easy to transmit over the network. Base64 encoding of images for CSS is highly discussed on our blog. Base64 is not new to our regular readers but the current application is different. Here is How to Use Base64 Encoding on ESP32 Arduino. ESP32 lacks sufficient RAM which limits the actual capabillity. You can actually use HTTP POST (like we have shown with IBM Watson IoT … [Read more...]
Users are Not Avoiding Multi Cloud Anymore
The majority of the medium to large companies currently source their workloads and private cloud applications from their own data centers. According to studies, this will change significantly in the upcoming years. For the coming year, the analysts predict a further significant increase in the use of public clouds. Hybrid Clouds would become the rule, and managers in future rely heavily on the … [Read more...]
ESP32 Arduino : Develop Android App to Receive Push Notification
We just want to make sure that our readers can develop an Android app for our IoT examples. We will not go in to many details as there are existing nice guides with Android source code by the others. It is Not Difficult to Develop Android App to Receive Push Notification ESP32 Arduino as There Are Source Code, Easy Web UI Tools. You need not to be an expert Android app developer to just develop an … [Read more...]
How to Install Mosquitto MQTT Broker/Server on Ubuntu Cloud Server
Here is How To How to Install Mosquitto MQTT Broker/Server on Ubuntu Cloud Server So That You Need Not to Depend on Third Party MQTT Broker. To connect to a command line on your server instance you will need to use SSH with `root` privilege. Update, upgrade and install the required packages from Ubuntu repo : # sudo apt update sudo apt install mosquitto # install the … [Read more...]
ESP32 Arduino : Get Time & Date From NTP Server
Here is ESP32 Arduino How to Get Time & Date From NTP Server and Print it. This is upgrade of the projects where an event requires a timestamp, for example think of LED turning on after push button click or HTTP POST on button click. These events better to have a timestamp. Of course most robust way of adding timestamp using a real time clock (RTC) module with ESP32. However, RTC modules … [Read more...]