“This pHAT is a brilliant way to add a suite of environmental sensors to your project, all in a very compact form. I have it currently stacked directly on top of my Pi Zero W (which itself is in the Pibow Zero case).
Thanks to an excellent Python library that comes with Enviro pHAT, it took only a short time to write a daemon which takes readings from all sensors and logs them into a CSV file. Next task is to write some plotting functions for interactive plots.
One thing to note is there is some residual heat radiated off the CPU on the Pi. If your Enviro pHAT is stacked directly on top (like I have it now), it will show significantly higher readings. One solution is to move it away from the Pi and in my case I'll be adding a pHAT stack to my setup for that. One bonus of doing so will be the option to add a display (a Scroll pHAT!) to output some measurements there.
Once again, this is a fantastic piece of kit and I love it!”
“Bought one only for temperature readings and I must say I'm really pleased with it.
Mine is on a pHAT Stack, away from the Pi, and it's pretty accurate, just needed a little adjustments to code. In my case, the reported temperature was about 1.5c above the correct one.
Also tested the light level and color sensors and they seem to work pretty well too.
This is my latest addition to my pHAT collection, and, like all the other ones, I'm very pleased with it.”
“OK, so I have a bunch of Arduino's using 1Wire DS1820 sensors around the house, besides other sensors. I thought I would get into the world of Pi and update them. I decided to use this phat and the pi zero. The major issue with this board for any temperature sensing of the environment is simply that the Pi seems to through off so much heat even at complete idle that the sensor simply cannot measure the room air temp. I check with my thermometer and my existing arduino ds1820 in the same location (next to each other) and 21c is 25.39c on the envirophat! I guess it's due to the Pi heat as the cpu is reporting around 33c. it's way off and not at all usable for environmental temperature sensing, which is what this board is all about? I'm going to go back to ds1820 on a lead, of the pi.”
“Amazing little piece of hardware. Used it in a project to monitor plant growth (writing data to a SQlite3 database and displaying sensor data in a webinterface).
Feel free to check it out and contribute!
https://github.com/cmar0ck/enviroPi”
“This was bought along with a Pi Zero W for my first Raspberry project - a basic weather station that uploads to the web (weather underground). Apart from the slight hiccups that the temp sensor needs adjustment to compensate for the heat from the Pi and the barometer is a few factors of 10 out it was really surprisingly easy to get it to do what I wanted. I'm now thinking of expanding the project because of the success. Hopefully I'll figure out how to upload the code so that others can play too.”
“Coupled with Micro DOT PHAT, you can perform nice weather station and display temperature, pression, light level and also time with a "vintage" design. Now, I'am writing program for displaying historic pressure curve. Very easy to carry out this project !”
“I have two Enviro pHAT to data collection in experiments (exp. green house, "light room"...etc) at University. I use four together stacked 2x20 11 mm long pin GPIO headers (pirmorini number: COM0002) avoid to Raspberry zero heats the pHAT. The surface temperature of zero and Enviro pHAT (powered on and off) was measured three times with ISO calibrated no contact handheld infrared thermometer. There was no temperature difference between powered on and off zero+Enviro pHAT. The two zero+Enviro pHAT were put into a microprocessor controlled themperature chamber at 25 C (+/- 0.5 C, is the "room temperature") for 8 hours. The zeros were powered by one power bank, 20 000 mA, two USB output, 5V/1A and 5V/2.0A. The chamber temperature is readable by an "analog" glass laboratory thermometer, -1.0 C - +50 C, high precision, division: 0.5C. A simple python script was run, it read the themperature 1 minute cycles and write into a simple text file with time stamps. The two files were imported into one date file and analised by some basic statistically methode.
The result is that Enviro pHATs measure avarage +1.4500880328 C more than real temperature at 25C, +/- 0.5C, no lighted condition.”
