We can measure temperature and humidity inside the fridge using a normal temperature-humidity indicator but relative humidity (RH) could be inaccurate in that case. The moment the fridge door is opened, RH will shoot up due to ingress or egress of moisture in the surroundings. The small sniffer device, described in this article, picks up […]
Microcontroller Projects: Fridge Temperature and Humidity Indicator Continue Reading
Three-fourths of the earth is water, out of which 97 per cent is saline (in oceans, seas and groundwater). The remaining 2.5 per cent to 2.75 per cent is fresh water , out of which 1.75 per cent to two per cent is frozen in glaciers, ice and snow. Fresh groundwater and soil moisture constitutes
Microcontroller Projects: Sonar Water-Level Meter Continue Reading
The ESP8266 WiFi Module is a self-contained SOC that can give any microcontroller access to your WiFi network. It’s an extremely cost-effective board with a huge and ever-growing community. Each ESP8266 module comes pre-programmed with an AT command set firmware. This module has a powerful on-board processing and storage capability that allows it to act as a
Programming ESP8266 With Arduino IDE : The Easy Way Continue Reading
Description HC-12 are cheap 433MHz wireless serial port communication modules with a range up to 1800m in open space. Each costs about $5 when bought from China, and 2 of them can create wireless UART link that can be used, for example, to transfer telemetry data from UAV. Or drive IoT device. Or connect sensors.
433MHz wireless module configuration Continue Reading
To understand error messages shown by ESP8266 in the serial monitor, read the latest article: ESP8266 ERROR MESSAGES AND EXCEPTIONS EXPLAINED] Hi, guys. This tutorial is for helping you to flash firmware in your favorite ESP8266 module. I guess almost all of you have a good enough idea about ESP8266. Still, here a short note
Flash Firmware To ESP8266 WiFi Module the easy way Continue Reading
I²C vs SPI Today, at the low end of the communication protocols, we find I²C (for ‘Inter-Integrated Circuit’, protocol) and SPI (for ‘Serial Peripheral Interface’). Both protocols are well-suited for communications between integrated circuits, for slow communication with on-board peripherals. At the roots of these two popular protocols we find two major companies – Philips
Introduction to I²C and SPI protocols Continue Reading
The main objective of this project is to show how to interface a uCAM-II serial camera to 4Duino. uCAM-II is a highly integrated micro serial camera which could be controlled by any host that requires a video camera or a JPEG compressed still camera for embedded imaging applications. uCAM-II processes various features making it trivial
4Duino UCAM-II Demo Continue Reading
While most of my microcontroller designs run on 3.3 volts there is still the ocasional 5 volt design. Or I do something with an Arduino. So the need may arise to interface between logic working at different voltage levels. There are several ways of doing this, depending on your needs. Things are relatively simple as
Bi-Directional Voltage Level Translator Continue Reading
This project is a platform for drinking water monitoring and analytics, consists of IoT device, cloud, and mobile and web app. Things used in this project Hardware components Arduino MKR1000 × 1 PCF8574 × 1 AC-DC Module 5V 500mA × 1 10 Segment LED Bar Graph (Red) × 1 Resistor 100 ohm × 11 Resistor
Project “Gallon” – Smart Drinking Water Monitoring Platform Continue Reading
Battery lifetime is a key consideration for the development of the wireless sensor nodes that will populate the Industrial Internet of Things (IIoT). In many applications, the sensor nodes will need to be installed in locations that are difficult to reach let alone service. The sensor nodes need to be autonomous in terms of energy
Maximize the Energy from Long-Life Batteries Continue Reading
