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Naesstrom / Airrohr-kit

A complete kit for building a Air Quality meter for the Luftdaten.info project
http://www.luftdaten.info
GNU General Public License v3.0
34 stars 5 forks source link

DHT22 female header or direct solder? #2

Open Cinezaster opened 6 years ago

Cinezaster commented 6 years ago

How do you connect the DHT22 to the board? I see in the photo that it has male headers soldered to it.

Wouldn't it be a beter idea to put the DHT22 directly on the board, next to the SDS011 connector or opposite side in the area of the SDS011 input? Experience learned that the wired connection between DHT22 sensor is a weak point because of the thin leads of the DHT22 sensor. Having it to close to the NodeMcu or WeMos is also a problem because it radiates extra heat and can influence the data.

For our LoraWan version we put the DHT22 underneath the NodeMcu. Not our best idea ;-) In June we're going to deploy an extra 100 sensors in Brussel (influencair.be), It would be cool to have a pcb like this.

ricki-z commented 5 years ago

The temperature sensors should be places 'near' the ambient air. Beside the NodeMCU and the SDS011 you may get values some degrees too high.

Naesstrom commented 5 years ago

My god I've been a bad creator not replying!

Yeah I soldered some male headers and attached them with normal jumper cables, making sure to use some zip ties to fasten it as good as I could. I guess one way would be to get some JST XH 2.5mm 4-Pin Connectors like these to get a more secure connection. image