#Temperature script for system lens plus#

The remaining pin on the DHT22 is the data pin and will be labeled ‘out’ or ‘s’ or ‘data’. Connect this to pin 6 Gnd (two pins below the 5V pin) on the Zero WH. The Gnd pin will be labeled ‘-’ or ‘Gnd’ or something equivalent. Connect this to pin 2 (the top right pin, 5V) of the Pi Zero WH. There should be a pin label for power on the DHT22 (e.g. The DHT22 will have three pins that you will need to connect to your Pi Zero WH - 5V, Gnd, and data. We also want something really easy to wire up without having to add a pull-up resistor or anything funky.

We are using the DHT22 temperature/humidity sensor because of its temperature accuracy (+/- 0.5 ☌), humidity range (0–100%), and low cost. 1) No one is allowed to sell more than one unit per order for Zero W per Raspberry Pi rules (boo!) and 2) The Zero WH has the header pre-soldered, which will make our project assembly super quick and easy. We are using the $14 Zero WH instead of the $10 Zero W for two reasons. As of the time of this writeup, it is hard to find a vendor that allows more than one Zero WH per order except for several UK vendors that have either no limit or a limit of 10. You can easily get each item above in bulk to minimize shipping costs with the exception of the Raspberry Pi Zero WH, which may be more challenging outside of the UK.

#Temperature script for system lens plus#

The setup for each sensor node is going to cost ~$31 plus shipping (~$37+shipping with the case). (Optional) Raspberry Pi Zero W case ($6).DHT22 Temperature/Humidity Sensor ($5, two-pack for $10 here).Here is the list of everything we need per sensor node and the approximate cost (minus shipping):

Raspberry Pi temperature sensor network video tutorial The HardwareĪ perfect application for a $14 Raspberry Pi Zero WH is to Network Temperature Sensors as this device is compact, inexpensive, powerful, and has built-in WiFi.