[sdiy] Very cheap SPI pressure sensors.. anybody ??

[Jean-Pierre Desrochers]

I'm looking for very cheap SPI pressure sensors (around $1.00 a piece or
less)

For a future project. The pressure value doesn't matter but the size and
cost do.

I will need around 90 of these sensors.

 

For example I found this:

BMP180 GY-68 GY68 3.3V 5V BMP-180 Temperature Pressure Sensor Module
Barometric IIC I2C Interface Sensor Module Replace BMP085  $0.90CAD

 
<https://www.aliexpress.com/item/32832330585.html?src=google&albch=shopping&
acnt=708-803-3821&isdl=y&slnk=&plac=&mtctp=&albbt=Google_7_shopping&aff_plat
form=google&aff_short_key=UneMJZVf&&albagn=888888&isSmbAutoCall=false&needSm
bHouyi=false&albcp=7386552844&albag=80241711349&trgt=743612850714&crea=en328
32330585&netw=u&device=c&albpg=743612850714&albpd=en32832330585&gclid=CjwKCA
jw9MuCBhBUEiwAbDZ-7mU2hTS0J2DLxvsPsj8F40L-zV8vtApw9ds_ks1c2Qjg7dLiKgsy3RoCq-
EQAvD_BwE&gclsrc=aw.ds>
https://www.aliexpress.com/item/32832330585.html?src=google&albch=shopping&a
cnt=708-803-3821&isdl=y&slnk=&plac=&mtctp=&albbt=Google_7_shopping&aff_platf
orm=google&aff_short_key=UneMJZVf&&albagn=888888&isSmbAutoCall=false&needSmb
Houyi=false&albcp=7386552844&albag=80241711349&trgt=743612850714&crea=en3283
2330585&netw=u&device=c&albpg=743612850714&albpd=en32832330585&gclid=CjwKCAj
w9MuCBhBUEiwAbDZ-7mU2hTS0J2DLxvsPsj8F40L-zV8vtApw9ds_ks1c2Qjg7dLiKgsy3RoCq-E
QAvD_BwE&gclsrc=aw.ds

But because I need 90 devices and the BMP180 is I2C and has only one address
value
I would need somekind of multiplexer to address 90 devices (one at the time
obviously).

So.. SPI devices would fit better here.

 

One other possibility would be to use this type:

MPS20N0040D MPS20N0040D-D Sphygmomanometer Dip Air Pressure Sensor 0-40kPa
DIP-6 For Arduino Raspb   $0.74CAD

https://www.aliexpress.com/item/4000354356373.html?src=google
<https://www.aliexpress.com/item/4000354356373.html?src=google&albch=shoppin
g&acnt=708-803-3821&isdl=y&slnk=&plac=&mtctp=&albbt=Google_7_shopping&aff_pl
atform=google&aff_short_key=UneMJZVf&&albagn=888888&isSmbAutoCall=false&need
SmbHouyi=false&albcp=9604672960&albag=100679328364&trgt=296904913880&crea=en
4000354356373&netw=u&device=c&albpg=296904913880&albpd=en4000354356373&gclid
=CjwKCAjw9MuCBhBUEiwAbDZ-7kff0q--0F6YUo73aVqE_HAtqkRyIslFbEMRTWz7QICR2szctlC
7zxoCrMUQAvD_BwE&gclsrc=aw.ds>
&albch=shopping&acnt=708-803-3821&isdl=y&slnk=&plac=&mtctp=&albbt=Google_7_s
hopping&aff_platform=google&aff_short_key=UneMJZVf&&albagn=888888&isSmbAutoC
all=false&needSmbHouyi=false&albcp=9604672960&albag=100679328364&trgt=296904
913880&crea=en4000354356373&netw=u&device=c&albpg=296904913880&albpd=en40003
54356373&gclid=CjwKCAjw9MuCBhBUEiwAbDZ-7kff0q--0F6YUo73aVqE_HAtqkRyIslFbEMRT
Wz7QICR2szctlC7zxoCrMUQAvD_BwE&gclsrc=aw.ds

 

But I'll need some analog IC to manage the output..

Again the part's pressure specs value do not matter.. I will manage a way to
use it.

but the size and cost do.

 

So far the best would be a SPI equivalent of the BMP180 IC..

Let me know if someone googled something I did not spot !

 

JP

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