A fun IoT starter project is temperature sensors: Everyone cares about the weather. I am using the esp8266 and a DS18b20 sensor to post the temperature on my balcony to twitter.
For the current version of this project i`m using a Wemos D1 Mini that i had laying around: rev1 used an ESP8266-01, but that version of the esp has some disadvantages when it comes to IoT Sensor applications: Power management
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