Sub 20Hz sounds are infrasound and commonly we need special electrical system to pick up the sounds of that range. Infrasounds are low frequency sound waves. They are both mechanical vibrations and acoustic oscillations. They are usually below the threshold of sounds perceptible to the human ear (between 0 Hz and 16 to 20 Hz approximately) At lower frequencies, for physiological reasons, they are … [Read more...]
Scope of ESP32 in Commercial IoT Products
Can ESP32 used in Commercial IoT products? Yes, ESP32 has modules and SoC to fit your production need. However, Arduino IDE is not for production. The reason we switched our projects from genuine Arduino to ESP32 Arduino is to broaden the scope. Our IoT guides are around IBM for highest compatibility. Node-red is the most popular IoT control software, which is very easy to use and many tutorials. … [Read more...]
What Are the Advantages of EPP32 Over Arduino UNO?
The ESP32 is a cheap Wi-Fi module (and also ESP32 used to indicate board) which perfectly suited for DIY projects in the Internet of Things (IoT). When we are using ESP32 based boards with Arduino IDE (like, in our setup of Arduino UNO IDE guide) then the ESP32 is becoming "Arduino compatible" board. It is not what is supported by official Arduino by any means. The Arduino UNO uses a 8-bit … [Read more...]
ESP32 Arduino OLED Display Example (I2C)
In our previous guide on ESP32 Arduino With LCD, we used an I²C module. OLED displays with I²C are sold as one unit. These days, they does not cost huge. In our earlier guides we have explained about different protocols, interfaces like I²C, Serial Peripheral Interface. Another relevant tutorial is breadboard power supply module). We are using a 0.96 inch SSD1306 OLED display (blue/white) … [Read more...]
ESP32 Arduino Wi-Fi Access Point with Wi-Fi Connection (Station)
It is possible to setup ESP32's Wi-Fi to access point and station. ESP32 can connect to another hotspot and share the connection. An access point (AP) is a networking hardware device which allows other Wi-Fi devices to connect to a network. Some basic theory required to know for making basic code better. An AP is different from a hotspot. Hotspot is the physical location (and the device) … [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...]
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...]
Over-the-Air Programming (OTA) and Arduino
Over-the-Air Programming (OTA) includes different methods of software, settings distribution and not limited to development board but includes the consumer devices such as smartphones, set-top boxes. With Over-the-Air Programming (OTA), from one central console we can send an update to all the devices. Related terminologies are over-the-air service provisioning (OTASP), over-the-air provisioning … [Read more...]
CircuitPython vs C/C++ vs Lua for the Microcontrollers
While programming languages can not be compared, specially when they are diverse in basic nature like Python vs C/C++ or Lua with them yet the question of comparison arises. Investing time behind anything should have a goal. While MicroPython, CircuitPython variations of Python has been discussed on this website and the problems of Arduino "langugage" discussed, place of C/C++ in the world of … [Read more...]
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