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I have a little problem for school and I have to read the temperature with Arduino from a DTH11 sensor and print it in serial, only in C language. Can someone help me with an example or something.

Clifford
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Andrei Croitoru
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  • The DTH11 has a digital single-wire serial interface - the ADC is of no use to you with this sensor. Really all you are asking here if for someone to Google it for you: https://www.instructables.com/id/How-to-interface-Humidity-and-Temperature-DTH11-Se/ – Clifford Apr 23 '19 at 21:07

1 Answers1

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You can find the DHT11 data sheet on the Internet, for example

https://akizukidenshi.com/download/ds/aosong/DHT11.pdf or

https://www.mouser.com/ds/2/758/DHT11-Technical-Data-Sheet-Translated-Version-1143054.pdf

there are sections which explain how the sensor module communicates via 1 wire with the MCU (Arduino).

Then, once you have an idea how the communication happens, you can read more articles like

https://howtomechatronics.com/tutorials/arduino/dht11-dht22-sensors-temperature-and-humidity-tutorial-using-arduino/

and there are many others, most use an already written library.

If your assignment won't let you use a library, you'll have to read for example the code at https://playground.arduino.cc/Main/DHTLib/ in files dht.h and dht.cpp and implement your own, maybe minimal version based on your understanding of the information provided on DHT's data sheet.

I would recommend to get things working by using a library first, then change it to work without.

Alex Baban
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