Raspberry pi temperature and light logger

#Raspberry pi temperature and light logger how to
#Raspberry pi temperature and light logger install
#Raspberry pi temperature and light logger serial
#Raspberry pi temperature and light logger update

The values are used to initialise the database on the server. Ensure these match the host names of each machine you plan to add. These are the machines you will be using in your final setup. The default server configuration will list some default values for hosts, such as: hosts =

#Raspberry pi temperature and light logger update

If you created a server configuration file above, update the defaulted hosts in ~/.temperature/temperature-machine.cfg. It will ask you to choose between the server and client and create an appropriate configuration file in ~/.temperature/temperature-machine.cfg. Run the following command (if you see an error about port already in use, try again until it works).

If you already have a server running and youР В Р вЂ Р В РІР‚С™Р Р†РІР‚С›РЎС›re adding another machine, set it up as a client. If you have a single machine, you want a server. Sudo apt-key adv -keyserver -recv-keys 00258F48226612AEР В РІР‚СњР вЂ™Р’Вecide if you will be running the temperature-machine as a server or client. sudo bash -c 'echo 'deb stable temperature-machine' > /etc/apt/sources.list' Setup apt-get to recognise the temperature-machine repository and import the public key (increasing security by ensuring only official packages are installed from it). It sends the data to a nominated Р В Р вЂ Р В РІР‚С™Р РЋРЎв„ўserverР В Р вЂ Р В РІР‚С™Р РЋРЎС™ and the server stores it all in a round robin database and serves up the charts via a web page. There are lots of options to record the temperature data but for something a bit different, the temperature-machine software logs temperatures from multiple sensors on multiple PiР В Р вЂ Р В РІР‚С™Р Р†РІР‚С›РЎС›s.

#Raspberry pi temperature and light logger install

Once you can see the w1_slave file, youР В Р вЂ Р В РІР‚С™Р Р†РІР‚С›РЎС›re ready to install the data logging software.

#Raspberry pi temperature and light logger how to

See the data sheet or the projectР В Р вЂ Р В РІР‚С™Р Р†РІР‚С›РЎС›s documentation for more details (including how to change the precision of the sensor). The scratchpad allows you to program the sensor as well as read temperature data from it. The temperature is shown as the t value 20.687 Р В Р вЂ Р вЂ™Р’ВР В Р вЂ° in this case. If everything is connected ok, the contents of the scratchpad will be written to a file under /sys/bus/w1/devices/28-xxx/w1_slave (where xxx will be a HEX number unique to your sensor). On the sensor itself, temperature measurements are stored in an area of memory called the Р В Р вЂ Р В РІР‚С™Р РЋРЎв„ўscratchpadР В Р вЂ Р В РІР‚С™Р РЋРЎС™. It will load the GPIO 1-wire driver and any attached temperature sensor should be automatically detected.

Make sure you have the following line in your /boot/config.txt. Without it, it canР В Р вЂ Р В РІР‚С™Р Р†РІР‚С›РЎС›t tell if it should start as high or low it would be left floating. This acts as a pull-up resistor to ensure that the Pi knows that the data line starts in a Р В Р вЂ Р В РІР‚С™Р РЋРЎв„ўhighР В Р вЂ Р В РІР‚С™Р РЋРЎС™ state. The other thing youР В Р вЂ Р В РІР‚С™Р Р†РІР‚С›РЎС›ll need to do is connect the 4.7k Р В РЎвЂєР вЂ™Р’В© resistor between the power and data lines. There a loads of tutorials on the web but youР В Р вЂ Р В РІР‚С™Р Р†РІР‚С›РЎС›re looking to connect the following physical pins on the Pi to the following sensor connectors.

Setup the HardwareР В РІР‚СњР вЂ™Р’В¬onnecting the temperature sensor to the Pi is straight forward. Something with a PL2302TA chip in it like this module or the Adafruit console cable.

#Raspberry pi temperature and light logger serial

Optional extras You might also want to consider a USB Wifi adapter (about Р В РІР‚в„ўР В РІвЂљВ¬ 6), a case (I like the one from Switched On Components at Р В РІР‚в„ўР В РІвЂљВ¬ 3.80) and a USB to TTL serial connection for headless setup. Some jumper wires or otherwise recycled wires with connectors Track days, weeks and months worth of temperature data and display some pretty graphs via the web. Using a Raspberry Pi Zero, some cheap components and some custom software, you can build a data logger to track ambient temperature in your home for around Р В РІР‚в„ўР В РІвЂљВ¬10.