Category Archive: IoT Kits

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/

Jun 18

Temporary Weather Station at the beach thru June 26, 2017

I’ve temporarily set up one of the IoT Kits weather stations in Bethany Beach, Delaware while here on vacation for the next week and a half. Follow it at: https://thingspeak.com/channels/286120 and http://aprs.fi/w4krl-8 73 Karl W4KRL

Permanent link to this article: http://w4krl.com/temporary-weather-station-at-the-beach-thru-june-26-2017/

Jun 18

Important Weather Kit Update 16 June 2017

IMPORTANT NOTE FOR WEATHER STATION BUILDERS Some builders have noted that the markings on the XH 2-pin connector leads do not conform to the instructions.  It appears that every pair has a different set of markings. Getting the polarity of the connectors wrong, particularly for the LiPo cell connector, can damage the TP4056 charger and D1 Mini …

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Permanent link to this article: http://w4krl.com/important-weather-kit-update-16-june-2017/

May 21

Power supply measurements

Most electronic projects operate on low voltage direct current. This is often provided by a USB connection or a battery. There are several possibilities to power a project from the 120 Vac power line. A common way is to use a wall adapter (wall wart) and feed low voltage direct current to your project through a …

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

Apr 16

ThingSpeak Addins

Here is a selection of MATLAB Visualizations ThingSpeak Addins  

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

Apr 04

HacDC/W3HAC Meeting Presentation Announcement – April 12, 2017 at 7:30 pm

Some of our members recently purchased a solar powered, Arduino programmable, weather station kit from Karl, W4KRL at the Winterfest in Annandale, VA. Due to the popularity of this kit, I invited Karl to come to our next club meeting to give a presentation all about its development, how the station works, etc. Karl has graciously …

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Permanent link to this article: http://w4krl.com/hacdcw3hac-meeting-presentation-announcement-april-12-2017-at-730-pm/

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/

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/