Category Archive: Internet of Things

Jul 11

New Bethany version firmware for Weather Stations

July 11, 2017 It has been gratifying to hear from the weather station builders. I took a break from hardware development while on a beach vacation in June but made some important firmware upgrades between taking the sun and eating blue crabs. A few of the changes improve the reliability of the solar power supply, …

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Permanent link to this article: http://w4krl.com/new-bethany-version-firmware-for-weather-stations/

Apr 16

ThingSpeak Addins

Here is a selection of MATLAB Visualizations ThingSpeak Addins  

Permanent link to this article: http://w4krl.com/thingspeak-addins/

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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Permanent link to this article: http://w4krl.com/di-mini-esp8266-wi-fi-status-codes/

Mar 31

Use 2.4GHz Wi-Fi for weather station

The weather station kit and other Wi-Fi-based projects use the ESP8266 system on a chip. This chip supports 2.4GHz Wi-Fi but not 5GHz. If your Wi-Fi works on both bands you probably have two SSIDs. The 5GHz band SSID often ends in 5G like this – “BlackCat-5G”. When you set up the config.h file for …

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Permanent link to this article: http://w4krl.com/use-2-4ghz-wi-fi-for-weather-station/

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/