pressure sensor read out via AVR

here is a little demonstration how sensitive the SDP610 (Sensirion) differential pressure sensor is. It can be read out as a I2C slave device, the numbers on the display are hi byte, low byte and checksum byte of the measurement. One tick corresponds to 1/60 Pa ( the atmospheric pressure is rougly 100.000 Pa, just for the sake of all those zeroes and so that you get the idea).

You can see almost everything including the air movements when I move my hand :-) remember, it's a differential pressure sensor and the other port is right beneath the connected input (white silicone tube).

I forgot to show the start-up sequence. I perform some tests on the I2C bus and the device, followed by a soft reset. Feel free to ask me if you have trouble interfacing this device.

And now for some good news: you can get a sample from Senrision, entirely free of charge :-)

Category:

Science & Technology

Tags:

• SDP600
• series
• pressure
• sensor
• atmel
• avr
• microcontroller
• I2C
• read

[hboy007]

@a7sssss

code is written in assembler and I no longer feel like sharing it since all those who promised to give me an update on what they were doing with it never did.

Just follow the documentation provided by Sensirion. You'll need to properly initialize the sensor and discard some readings after reset/ parameters change as well as include bitrate dependent timeouts to detect hangups. Good luck.

[a7sssss]

hi is it possible to share the c code of this device. I'm new to this thing and i would love to learn more about it from you.

thank you

[hboy007]

@megatatik

What types of sensors are you using? I won't have the time to do the implementations for you, but the 8bit AVR RISC µCs are quite suitable for these tasks. Please get in touch with me via PM.

[megatatik]

Can you help me write a code for a Atmel Atmega uC that needs to measure pressure of a water column by making the difference between the pressure indicated by the transducer located underneath the water column and a barometric sensor located on top of the water ??I have the hardware on stand-by for quite a while because i haven't decided if atmel is best for my application

[hboy007]

@theMakeStuffClub

check your inbox :-)

[theMakeStuffClub]

hey, would you be willing to pm your code? i just got one of these as a sample and am looking to get it running quick and easily. thanks!