3wire SPI temperature sensor and relay control boards (suitable for Raspberry Pi)

I've been using this LM95071 temperature sensor breakout for quite a while.

Low-power, high-resolution (13-Bit plus sign) digital temperature sensor with an SPI/MICROWIRE compatible interface. 5-pin SOT-23. From Texas Instruments.
Works just fine with the RPi :)

And here is the relay control board:

Coil is 5V DC. Controlled with digital transistor. All you need is 1 GPIO pin from any MCU.
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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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