NodeMCU, DHT11 & LC...
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NodeMCU, DHT11 & LCD - did I wear them out?

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Estimable Member
Joined: 2 years ago
Posts: 77
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Good morning! One of my pandemic projects was a simple temp/humidity sensor with a microcontroller, DHT11 and LCD display in a 3D printed holder. Code is simple, snips probably come from Drone Bot Workshop tutorials (thanks, Bill 🙂 ).

It sits on my desk quietly, until recently when it started to display odd characters. Happened 3 times in the last week. Of course powering it off/on "fixes" it. 

IMG 8336

I'll start troubleshooting, working from the sensor forward, but my philosophical question is really about how much lifespan can I expect from these components that cost only a few dollars? 

Oh, this is what it is supposed to be displaying

IMG 8099

Have a great Sunday!

"Hardware eventually fails. Software eventually works." - Michael Hartung

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Honorable Member
Joined: 2 years ago
Posts: 471

I'm having a similar problem. I hooked up my DHT11 again after a while, and it only displays nan for the humidity and temperature.