Sending Commands to IBM Watson IoT to Trigger Event on Device

Till now we were mostly sending data from ESP32 like devices to IBM Watson IoT. Opposite direction of commands often a practical need, such as to control a LED connected to device. In this context, knowledge of cURL commands (here is cURL for Windows, other way is using Windows 10 bash) for testing required. IBM has "HTTP Messaging APIs for devices" and " Extending device management". We already … [Read more...]

ESP32 Arduino IBM Watson IoT Pulse Sensor Amped

In our previous two guides, we discussed how to create graph on IBM Watson IoT Dashboard, also provided code for DH11 sensor and in last guide how to use Pulse Monitor amped with ESP32 was shown with minimal theory. Here is Simple ESP32 Arduino IBM Watson IoT Pulse Sensor With Easy Coding and Default Graphing Widgets of IBM Watson IoT. It is important to realize that I am using a cheap China pulse … [Read more...]

ESP32 Arduino Pulse Sensor Amped

A PulseSensor library with popular sensor manufactured by PulseSensor.com (or it's cheaper China clone) exists for Arduino that can detect pulse. Optical heart rate sensors use a methodology called photoplethysmography (PPG) to measure heart rate. A photoplethysmogram (PPG) can detect blood volume changes in the microvascular bed of tissue. A photoplethysmography is obtained by using a pulse … [Read more...]

Cost Comparison of Cloud IoT Platform Vendors

In another article we discussed about different Cloud IoT platform vendors. Mostly in this blog we use IBM Watson IoT. The question will arise, how much we pay for using their IBM Watson IoT and Node-RED. We have credit card linked account and our net payable so far for the two services is zero. Because our usage is so low that comes under free Lite plan. When we started around IoT topics for the … [Read more...]

Arduino Compatible Vs Raspberry Pi for IoT Projects

It is too much complicated question in present day. Raspberry Pi and Arduino compatible microcontrollers are quite different things. Raspberry Pi is a professional grade single board computer. So we can use programming langugage quite similar to programming a desktop computer or server. When we say Arduino Compatible, then we mean the microcontrollers, SoC which has some way to use with Arduino … [Read more...]

What Are the Steps to Get Prototype PCB Manufactured

These days, CAD files of the Open Source projects often distributed. In these situations, we can not use DIY methods of single layer PCB fabrication at home or some other ways like using Flex boards. For this process, we need to follow procedure to save cost yet get the best result. The procedure will demand to learn lot of new things and with time, a skilled can have excellent quality … [Read more...]

What Are Situations to Avoid Cloud Computing

Cloud Computing unfortunately still limited by configaration of the data centers. Commonly you can not expect horizontal scaling and vertical scaling togather. Whenever your application needs many TBs of RAM, then your option of provider becomes limited to hardly 3-4. You actually need the platform with physical servers which can afford your multi-TB RAM sucking application. IBM like providers has … [Read more...]

How to Setup Node.js (low.js) on Windows for ESP32

Low.js is a port of Node.js and Has Certain Requirements to Run. Low.js developed by a company named NEONIOUS who has own ESP32 board (which you may purchase). Commonly, when we say ESP32 then we mean ESP-WROOM-32 based board. However, for this guide that ESP-WROOM-32 based board will not work. We need ESP32-WROVER based board. ESP-WROOM-32 does not have the 4 MB PSRAM required for low.js. Wrover … [Read more...]

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