Hi Larry.
I’m not sure what might be the problem. Can you try these suggestions?

• Select another Wemos D1 mini board;
• If selecting another Wemos D1 mini board doesn’t work, try a Generic ESP8266 Module;
• Try powering the OLED display with 5V. 

Let me know the results.
Regards,
Sara

So it’s up and running , thank you. I didn’t have to change the 3.3 to 5v , when I tried to use generic ESP8266 and for some reason I got D3 not used . What actually did work was to use the LoLin (WeMos)D1 & R2 mini , so once again thank you.

On my display it shows Mon 8.03.2021, is there someplace where I would change it in the sketch , I am not sure exactly how I would do this task.

Great!
What do you want to modify?
To modify the date and time on the display, you have to take a look at the drawDateTime() function on the code.
Regards,
Sara

Using the Weather_Station demo program on my Wemos D1 mini,I was able to get most everything working as I wanted , where do I change format for time zone from 24 hr to 12 hr format,Thanks

Hi.
This thread is quite old. Can you tell me exactly what is the project you’re following? Can you send me a link to that project?
Regards,
Sara

This is actually a project from your home automation book I believe chapter 5 Weather Station Demo

Hi.
 
Thank you for your patience.
 
the code doesn’t have a setting to automatically set the time to 12-hour format: https://github.com/ThingPulse/esp8266-weather-station/issues/150
 
But, you can change the drawDateTime() function to check if hour >12 (subtract 12 to the hour).
 
Or you can take a look at the suggestions on this discussion: https://github.com/ThingPulse/esp8266-weather-station/issues/37
 
I hope this helps.
 
Regards,
Sara