https://www.phidgets.com/?&..
Category : phidgets
https://www.phidgets.com/?tier=3&catid=14&pcid=12&prodid=95 Given formula: Temperature C = ( VoltageRatio×222.2 ) – 61.111 VoltageRatio is the raw voltage you read divided by 5.0 VDC. Example: raw reading of 2.0145 VDC Voltage Ratio would then be: 2.0145 / 5.0 = 0.4029 Let’s re-write formula using raw voltage reading instead of ratio: C = R / 5 * 222.2 – 61.111 where ..
# install pip sudo su cd curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py python get-pip.py pip –version # install DHT libraries sudo pip install Adafruit_Python_DHT # https://github.com/adafruit/Adafruit_Python_DHT/issues/63 sudo apt-get update sudo apt-get install rpi.gpio sudo apt-get install python3-rpi.gpio sudo apt-get install build-essential python3-dev sudo apt-get install python3-setuptools sudo apt-get install libzbar-dev libzbar0 git clone https://github.com/adafruit/Adafruit_Python_DHT.git cd Adafruit_Python_DHT sudo ..
Without the library, you can get this error: Could not locate the Phidget C library (libphidget22java.so). Make sure it is installed, and add it’ s path to LD_LIBRARY_PATH. at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1320) ~[spring-beans-5.2.0.RELEASE.jar!/:5.2.0.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1214) ~[spring-beans-5.2.0.RELEASE.jar!/:5.2.0.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:557) ~[spring-beans-5.2.0.RELEASE.jar!/:5.2.0.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.0.RELEASE.jar!/:5.2.0.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.0.RELEASE.jar!/:5.2.0.RELEASE] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.0.RELEASE.jar!/:5.2.0.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.0.RELEASE.jar!/:5.2.0.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.0.RELEASE.jar!/:5.2.0.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:879) ~[spring-beans-5.2.0.RELEASE.jar!/:5.2.0.RELEASE] ..
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Also see: https://wiki.lupsha.com/raspberry-pi-3-setting-up-a-phidgets-voltage-reader-2/ #!/bin/bash # # hits the sensorreading app and grabs sensor raw value, and computes it, per phidgets 1117 raw to voltage # # Alan Lupsha 10/20/2019 # # hit the API and get the reading # # ex: {“userCommand”:”/sensor/0″,”errors”:[],”workLog”:[],”port”:{“index”:0,”value”:584}} # READING=`curl –silent -H “Accept: application/json” http://10.1.10.12:50003/sensor/0` echo “API reading: $READING” # # ..
Turns out you need a powered USB hub, otherwise the Pi 3 won’t see the Phidgets 8/8/8 board. The setup: Pi3 Phidgets 8/8/8 board ( https://www.phidgets.com/?tier=3&prodid=16 ) Phidgets 1117 voltage sensor https://www.phidgets.com/?&prodid=88 Rosewill self-powered 7 port USB hub https://www.newegg.com/rosewill-rhub-300-usb/p/N82E16817182057 Once a self-powered USB hub is provided, the Phidgets IO board is detected: Setting up the Pi: sudo su apt-get ..