License

MIT

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DHT22 SPI Driver

11 months ago 301
  • Description
  • Documents
  • BOM
  • Attachments
  • Members
  • Comments

Description

Circuit to drive the DHT22 temperature and humidity sensor via the SPI bus. The advantage is, that it uses next to no CPU resources as everything runs in hardware on most platforms. This allows a multitaking OS like Linux to reliably read the sensor without issues.

TESTED WORKING

Documents

Sheet_1

v1.0

v1.1

BOM

ID Name Designator Footprint Quantity Manufacturer Part Manufacturer Supplier Supplier Part Price LCSC Assembly Mounted BOM_Supplier BOM_Voltage BOM_Mounted BOM_Manufacturer BOM_Description BOM_Manufacturer Part BOM_Supplier Part
1 DHT22 S1 DHT22_AM2303_VERT 1 AdaFruit 3.3V - 5.5V Yes Aosong (Guangzhou) Electronics Co., Ltd. Digital-output relative humidity & temperature sensor/module PRODUCT ID: 385
2 33k R-DHT AXIAL-0.3 1
3 Header-Male-2.54_2x4 P-SPI HDR-4X2/2.54 1 LCSC ReliaPro Header2X4P 2.54mm C124386
4 SD101CW-E3-08 D1,D2 DO-35 2 LCSC VISHAY SD101CW-E3-08 C142623
5 BSS138 Q1,Q2 SOT-23(SOT-23-3) 2 LCSC DIODES BSS138-7-F C40912
6 10k R-DHTCE-PU,R-MISO-PU AXIAL-0.3 2
7 1u C-DHT22 CAP-D8.0XF3.5 1

Attachments

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Members

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