Si7021 breakout board (noname)


#1

Dear all, this is my first post here, and I’m a newb Fritzing user altogether. I find it a fantastic app with great community support, hence I want to dive deeper.

For my project, I am going to use Si7021-based sensor breakout boards I bought from China. They are described in detail on MySensors: https://www.mysensors.org/build/humidity_si7021. Unfortunately, I haven’t found this specific board part for Fritzing yet.

So the question is how should I search for it, to make sure I don’t start learning new part design instead of reusing something already made.


#2

I’ve assumed you have checked here, but search Google and add Fritzing to the term. Also select images so you can spot it quicker.


#3

Sure, did both. No luck so far.


#4

A google search for “fritzing part si7021” turns up parts in both adafruit’s and sparkfun’s frtizing repos as well as this project on the Fritzing projects site which has a part in the temp part bin:

http://fritzing.org/projects/arduino-environmental-monitoring

Peter


#5

Correct, found all of those, they are all not what I am looking for (unless I am blind).

The part I am after looks very much like the barometric pressure sensor GY-68 from the project you linked as well as the VERTER buck-boost there. So much so that I was thinking of re-using those to create the part myself (but it’s still a major effort for me to do it right). It does not look like the Adafruit or the SparkFun modules.

Potentially, the part may also be called SHT21 (see the page I linked in the original post), and I now even found a page showing a Fritzing layout with those modules: https://alxhou.wordpress.com/2012/07/01/multiple-sht21-softi2c/. But as you can see, the part is not drawn according to Fritzing quality, and I cannot download it anyway (could contact the guy of course if I cannot find the solution otherwise).

Does it make sense?


#6

I was looking at the SI7021 part, but you are correct the pinout is different (perhaps sparkfun’s version). When I get some time I’ll change it in to a correct (or at least correcter) part.

Peter


#7

I found how to include images :slight_smile: But I can only include one image :frowning: So have to split it in two posts.

To make it clear: what I am looking for is this part (3.3 V, 5 V tolerant design):
si7021
It is visually similar to GY-68.


#8

This part from MySensors page resembles the Adafruit design, but has 4 instead of 5 pins and I am not looking for it. It’s a 3.3 V design.
si7021_3v3


#9

The BMP180 is close, but boy is it made bad in BB

EDIT - also PCB uses path instead of circle.

I butchered a quick one, but it’s probably best to get Van to check it before you use it. At min check it yourself thoroughly.
Si7021.fzpz (14.5 KB)


#10

The only actionable complaint is that breadboard has the layerId silkscreen (which will break exporting the part as pdf or svg), but that’s all.

Peter


#11

I’m not that advanced to fix that. :slightly_smiling_face:


#12

Here is a copy of the part with the correct layerId in breadboard.

Si7021.fzpz (14.7 KB)

I didn’t change the moduleId so you will need to delete the current part before loading this one.

Peter


#13

Thank you people! Really appreciate the community!