Category Archive: Arduino

Apr 02

Di Mini (ESP8266) Wi-Fi Status Codes

The ESP8266 using the Arduino Core reports Wi-Fi status with the WiFi.status() function. The D1M-WX1 Weather Station attempts to connect to Wi-Fi every 250 milliseconds until the “Connect” status is found. If this does not happen after 15 attempts, it prints the status to the Serial Monitor. Normally, the LED on the ESP8266 flashes five or six …

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Mar 21

Suggested list of tools

Our first kit, the D1M-WX1 Solar Powered Weather Station, is very easy to build because it uses only “through hole” components. Although the breakout or daughter boards mounted to the printed circuit board do contain surface mount devices (SMDs), they are all pre-soldered. Only a few basic electronic shop tools are needed to assemble the …

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Permanent link to this article: http://w4krl.com/suggested-list-of-tools/

Dec 11

Sleep Mode for the Wemos D1 Mini

The key to using solar power in an Internet of Things project is to put the microcontroller unit into sleep modeafter the sensors are read and the data posted to your IoT server. The NodeMCU and the Wemos D1 WiFi, a larger profile that mimics the Arduino UNO form, reliably woke from deep sleep. So …

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Permanent link to this article: http://w4krl.com/sleep-mode-for-the-wemos-d1-mini/

Dec 06

External sensors for weather station

Recently the local Institute of Electrical and Electronic Engineers (IEEE) held two “hands on” sessions to build an Internet of Things (IoT) weather station. We built it on a breadboard so that the attendees would not have to solder wires. Several of the participants have kept their stations on-line and two have placed the unit …

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Permanent link to this article: http://w4krl.com/external-sensors-for-weather-station/

Nov 24

Solar Power Supply

A solar power supply would be a really neat addition to any Internet of Things project. The ultimate goal would be to have a self-sufficient IoT device that could be remotely reprogrammed with the Other The Air (OTA) feature. A key to using solar power is to reduce the average power requirement of the IoT device. …

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Permanent link to this article: http://w4krl.com/solar-power-supply/