olivierld/raspberry-coffee

JVM related (Java, Groovy, Scala, Kotlin, etc) samples for the Raspberry PI, relying on PI4J. IoT and friends.

raspberry-coffee's Issues

Bug in BMP180 readS16()

Hi Olivier,

Firstly, thanks for sharing! I took a copy of your BMP180.java and adapted it for the BME280 by taking logic from Adafruit's bme280.py. This device includes a humidity sensor and appears to be little-endian.
When readS16() forms a little-endian result it reads the hi byte as unsigned and the lo byte as signed whereas it should be the other way around. This bug doesn't affect the BMP180 as that device is presumably big-endian.

BTW I also have a BMP180 and your code works as-is with this device.

ttfn,
Aidan.

Text Console

Hi could you please share more details about how it's working the text console and how is hardware linke to raspberry?
Thanks
Paolo

Exception with battery monitor

Thanks for providing this. I also have a boat and solar panel. I'm also using a Witty Pi, USB router and modem to schedule and send back pictures and GPS details. Trying to implement the battery monitor too and seeing the following Exception after initial reading:

pi@raspberrypi:~/raspberry-pi4j-samples $ sudo ./gradlew [--daemon] build

FAILURE: Build failed with an exception.

• What went wrong:
  Task 'C' is ambiguous in root project 'raspberry-pi4j-samples'. Candidates are: 'check', 'chordFinder', 'classes', 'clean', 'clojureRepl', 'clojureTest', 'clojuredoc', 'combineJs', 'compileClojure', 'compileGroovy', 'compileJava', 'compileKotlin', 'compileScala', 'compileTestGroovy', 'compileTestJava', 'compileTestKotlin', 'compileTestScala', 'components', 'copyResources'.

• Try:
  Run gradlew tasks to get a list of available tasks. Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

• Get more help at https://help.gradle.org

BUILD FAILED in 10s
pi@raspberrypi:~/raspberry-pi4j-samples $

pi@raspberrypi:~/raspberry-pi4j-samples/ADC $ ./battery.monitor -min=289:3.75 -max=872:11.75 -debug=y
Read an ADC
Parameters are:
-calibration or -cal
-debug=y|n|yes|no|true|false - example -debug=y (default is n)
-ch=[0-7] - example -ch=0 (default is 0)
-min=minADC:minVolt - example -min=280:3.75 (default is 0:0.0)
-max=maxADC:maxVolt - example -min=879:11.25 (default is 1023:15.0)
-tune=ADC:volt - example -tune=973:12.6 (default is 1023:15.0)
-scale=y|n - example -scale=y (default is n)
-log=[log-file-name] - example -log=[batt.csv] (default is battery.log)

-min & -max are required if -tune is not here, and vice versa.
Prms: ADC Channel:0, MinADC:289, MinVolt:3.75, MaxADC:872, maxVolt:11.75
Volt [3.75, 11.75]
ADC [289, 872]
a=0.013227414, b=0.21569468
Value range: ADC=0 => V=0.21569468, ADC=1023 => V=13.747339
readAdc:858 (0x35A, 0&1101011010) Volume:83% (858) Volt:11.56
Exception in thread "main" java.lang.NullPointerException
at adc.sample.BatteryMonitor$1.valueUpdated(BatteryMonitor.java:145)
at adc.ADCContext.fireValueChanged(ADCContext.java:39)
at adc.ADCObserver.start(ADCObserver.java:121)
at adc.ADCObserver.start(ADCObserver.java:85)
at adc.sample.BatteryMonitor.(BatteryMonitor.java:154)
at adc.sample.BatteryMonitor.(BatteryMonitor.java:89)
at adc.sample.BatteryMonitor.main(BatteryMonitor.java:264)

Shutting down
Closing log file

Not sure if you can advise?

Thanks, Doug

HC_SR04 x10 times smaller distance

returning x10 smaller distance that it is

GPL-compatible?

Can I use your code in an Open Source Project under the GPLv3 license? I couldn't find any licensing information in your repository.

Error in curves

In RESTTideServer, in some cases I still need to identify (specially when switching between stations on different time zones), you need to hit Draw Curve twice to get to the right data.