A simple solar-powered IoT weather station

Posted on by Leave a comment

BME280 is a fully integrated environmental unit from Bosch that combines sensors for pressure, humidity, and temperature in a tiny 8-pin metal-lid LGA package of size 2.5 x 2.5 x 0.93 mm³. Because of its compact size, ease of use (BME280 supports standard I2C and SPI interfaces), and availability of supporting open-source Arduino libraries, BME280 is very popular among weather enthusiasts. We have seen its usage in our weather webserver project and standalone weather station tutorial before. This Instructable describes a similar weather station based on ESP8266 and BME280 and is solar-powered. The entire circuit is housed inside a 3-D printed enclosure.

Read more

ForEx: A compact desktop widget for foreign exchange rates display

Posted on by Leave a comment

ForEx is a cute little desktop widget designed by Stefan for displaying major foreign exchange rates and the time of different locations using ESP8266. The time zone references are fetched a bit complicated but this method works and deliver accurate results. Further it allows using the effective name of the city which makes easier to use. In a first step the coordinates of the desired city are evaluated using the API of openweathermap.org. This works by sending the name of the city in a format like “Sydney,au” to the API which will response with its coordinates. In the second step the

Read more

IoT Energy Meter

Posted on by One comment

This cloud-connected energy meter works in conjunction with the regular household power meter to provide detailed information about the electricity usage at home. Modern power meters have a LED blinking every time a watt-hour is used, the IEM detects these flashes using a interrupt, counts them, then the data is stored to the cloud. Usually power companies provide very rough electricity usage data, the IEM provides data with a minute resolution. Knowing the household electricity usage allows to extrapolate statistics and can give precise numbers about the costs.

Read more

OLED display for your soldering iron

Posted on by Leave a comment

This STM32F031-based OLED display for soldering iron tips is a very compact design and displays various stats like tip temperature, power consumption, supply voltage, etc. I found some projects where is used Weller soldering tips designed for WMRP soldering iron with standard 3.5mm jack and inside the tip is also thermocouple for sensing temperature. These tips are not so cheap but the quality is really great, especially for fine soldering. Hardware design is based on similar projects but with some modifications and improvements. Also my request was to make the hardware small as possible to fit into handle and capable

Read more
« Older Entries Recent Entries »