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I found what I have done wrong. On my ESP you see only D0 D2 D2 D3 etc
And because I did not see D1 I used SD1 and SD2. But is seems to be a misprint. Now I have connected it to the D2 and D2 and it works. Thanks a lot for your help.

regards from Pino in The Netherlands.

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Thanks, this helps. I m feeling that I am almost there.
I have successful flashed with ESP8266Flasher.exe the ESP8266:

in file ESP8266MAC.txt you see this:
20170331135810
AP MAC:1A-FE-34-D1-78-06
STA MAC:18-FE-34-D1-78-06

So that looks ok. The blinking LED stops. (this would be the default ...

Hi FipS,

thanks for your help. I now know how to connect the sensor. But I am overwhelmed with the choices you can make at nodemcu-build.com. Can I use the default value and I guess that I have to tick the boxes I2C and BME280? With NodeMCU Flasher I have some experience when I build the QuinLED ...

Hi FipS,

nice project. I want to replicate it myself and I managed to create the sensors in Domoticz. I can update the sensor data by hand with the URL.
After a long wait I have received a BME280 sensor and an ESP8266 ESP12 development board from China. https://nl.aliexpress.com/item/NodeMcu-Lua ...