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NodeMCU (ESP8266, ESP-12) + SHT75 + TMEP.CZ = Arduino meteostation
Everybody has meteostation... somebody better, somebody worse. I wanted meteostation too. I didn't spend a time with development of sophistic device. My requirements was very easy - measurement temperature, humidity and use SHT75, because I got that as a sample from (thanks a lot).

ESP12E (NodeMCU, ESP8266) + Si7021
After my experimentes with NodeMCU and SHT75 I designed next version of my mini meteostation. I designed own PCB for plastic box. I chose the same ESP8266 module which is in NodeMCU, ESP12E. SHT75 temperature/humidity sensor is expensive (but very accurate), so I chose another temperature/humidity sensor. Si7021 by Silicon Labs company.

ESP32 and Arduino IDE
Finally, I can write you a short tutorial how to play with ESP32 (more powerful than ESP8266). On the internet is a lot of tutorials how to do it, but this is a little bit different. I don't have LoLin32, Hornbill or ESP-DevkitC.

ESP32, SunDuino and temperature/humidity sensor Si7021 (HTU21)
Other article about ESP32, with using of development board of SunDuino ESP32 and temperature/humidity sensor Si7021 (HTU21). I recommend the first article about ESP32 and SunDuino ESP32 which is available on Thank for ESP32. I thank designer of SunDuino ESP32 board...

ESP32, SunDuino - temperature/humidity Si7021 sensor and OLED 128x64px (I2C)
Other article about ESP32. We again connect ESP32 to temperature/humidity sensor Si7021 (HTU21), but today we also connect OLED where will be showed data from sensor. The OLED has 128x64px resolution and communication bus is I2C as well as Si7021.

Watering system with NodeMCU (ESP8266, ESP12E)
If you follow me on social networks (facebook, twitter and google plus) maybe you saw a few posts which I shared. My the latest project is watering system with popular WiFi chip called ESP8266, ESP12E module, NodeMCU development board. This project was made like watering system for a few plants during summer vacations.

The board for weather station (meteostation) with ESP12E module (ESP8266, NodeMCU)
After my experiences with ESP12E (NodeMCU, ESP8266) and SHT75 temperature/humidity sensor I decided to make second version of board used for weather station. The first version is available on

Bolt IoT - first example and settings
The picture tutorial how to set and run Bolt IoT platform. Info about Bolt IoT and kickstarter campaign was mentioned in this news. The base component is ESP8266 chip in ESP12S module. Other components are GREEN LED (cloud indication) and BLUE LED (WiFi indication, voltage regulator for 3.3V (LMS1117) and microUSB cabel which is used like power supply. The main point of this project is SW part of Bolt IoT. Firmware of ESP8266 and cloud of the platform.

About ESP32 and the FireBeetle development board.
The first article about ESP32 and development board DFRobot by Richard Štefún. What is ESP32, module with ESP32, development board with ESP32 and how to install FireBeetle library to Arduino IDE.

Barometer WiFi ePaper 2.9
Josef Zvolánek (facebook, google plus, twitter) shared this amazing project of his weather station with tri-color ePaper display. Josef shared complete project with ino file for ESP8266 and also gerber files for PCB. Thanks a lot for sharing.