Here is part of ESP32 with DHT11 deep sleep guide explaining the basic behind code. Our DOIT ESP32 board (which we commonly use in examples on this website), not energy efficient for deep sleep. However, it works. We already can connect normal Arduino UNO with DHT 11, with ESP32 Arduino and also we can use the setup to send data to IBM Watson IoT. ESP32 offers us deep sleep mode for power … [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 With LCD : Connection & Code (I2C, LCD 1602A)
1602A LCD and I²C module are quite cheaper and easy to setup and code. Earlier, we have published guides on how to wire and setup 1602A LCD with Arduino UNO (which have not used the I²C module) which occupies 8 Pins on your Arduino. We have also explained about different protocols, interfaces like I²C, Serial Peripheral Interface and discussed interfacing 1602A LCD display using I²C Serial … [Read more...]
ESP32 Deep Sleep Guide
ESP32 offers us deep sleep mode for power saving. Power saving is an important factor for IoT applications and saving power we can make an IoT project running with two AA batteries for a year. Deep Sleep is of the CPUs and most of the RAM and peripherals which are clocked from APB_CLK are powered off. The RTC controller, RTC peripherals and RTC memories are parts of the chip which can kept powered … [Read more...]
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...]
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...]