Category: Internet of Things

Solar Radiation Shield under test

The D1M-WX1 and D1S-WX1 solar-powered weather stations heat up in direct sunlight giving an incorrectly high-temperature reading. Early results from testing an Acurite solar radiation shield are very good. The shield is available from several online vendors. Check around for a good price as the same item sells for $10 to $60 from different vendors. …

Continue reading

Permanent link to this article: https://w4krl.com/solar-radiation-shield-under-test/

Important Weather Kit Update 16 June 2017

IMPORTANT NOTE FOR WEATHER STATION BUILDERS Applies only to kits purchased before May 2018 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 …

Continue reading

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

ThingSpeak Addins

Here is a selection of MATLAB Visualizations tailored to the IoT Kits Weather Stations: ThingSpeak Addins

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

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 …

Continue reading

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

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 …

Continue reading

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

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 …

Continue reading

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

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 outdoors. …

Continue reading

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

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 Over The Air (OTA) feature. A key to using solar power is to reduce the average power requirement of the IoT device. …

Continue reading

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