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Give better wiring instructions for 1-wire devices. #2258

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Jul 24, 2024
Merged

Give better wiring instructions for 1-wire devices. #2258

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ab7c57a
Give better wiring instructions for 1-wire devices.
Hello1024 Dec 28, 2023
deb8942
adjusting based on PR feedback
Ellerbach Apr 9, 2024
ffd4237
fixing pull up
Ellerbach Apr 9, 2024
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4 changes: 1 addition & 3 deletions src/devices/Dhtxx/README.md
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Expand Up @@ -157,9 +157,7 @@ Now if your sensor is an I2C sensor, it should just work perfectly on Windows 10

#### 1-Wire Protocol Circuit

Simply connect your DHTxx data pin to GPIO26 (physical pin 37), the ground to the ground (physical pin 6) and the VCC to +5V (physical pin 2).

![schema](./dht22.png)
Simply connect your DHTxx data pin to GPIO26 (physical pin 37), the ground to the ground (physical pin 6) and the VCC to +3.3V (physical pin 1). You should probably add a 10k pullup resistor between GPIO26 (physical pin 37) and 3.3v (physical pin 1), to be within the specifications of the sensor, although it will usually work with software-pullups, which this library uses if available.

Some sensors are already sold with the 10K resistor. Connect the GPIO26 to the _data_ pin, its position can vary depending on the integrator.

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