Showing posts with label lm95071. Show all posts
Showing posts with label lm95071. Show all posts

Monday, January 14, 2013

Wireless temperature sensor with Raspberry Pi

Finally got some time to play with the Raspberry. Behold the wireless temperature sensor :D




The sensor itself is LM95071. Temperature is read through SPI. The only problem was that after the first read the sensor was put in shutdown mode... I guess this is because the SPI is full duplex and the SI/O pin was left dangling during WR to the sensor (even though I was only reading from it...). The solution was to add pull-down resistor to the SI/O pin (the additional resistor on the picture).

I have Apache web server on the RPi and I'm using WUSB54GC wifi dongle to transmit the temperature over the internet :)


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