Pyssel

From AppleWatch Strange mixture ? Humidity & Internetspeed ?  With HomeKit You can't show Your measured Internet speed in a proper way,  X Mbit/s. So why not show it in % ? the measured speed compared to the one You purchased from Your ISP(Internet Service Provider) ?  So now You see the point..... Humidity is also in % and can be displayed in the Home app. The only "if" is that the speed is displayed along with a "water drop"..... but maybe You can live with that ? 

From AppleWatch As long as it's possible to retrieve information, in some way, from a sensor OR a website/webserver, with temperature information, it's possible to show it in HomeKit with HomeBridge (HB). In this post  NodeRed (NR) is retrieving the temperature from Your selected source and is also acting  as the WEB endpoint   for  the HB  " homebridge-http-temperature " plugin . In my case I wanted an outside temperature so used the measurements from our Davis Weather station and their  JSON REST API but it could for example be Your Raspberry CPU temp  or showing the speed of Your Internet connection.

I have tried to find some basics how a standard underfloor control system is regulating the heating, but haven't, so started with checking up  our own temperature control system from LK (TCS). I used Node-Red, with Raspberry Pi(RPi), sensing when the TCS applied voltage to the actuator. Since the actuator is running on 24 VAC and the input on a GPIO PIN is maximum 3,3 VDC I used a optocoupler to level shift.  Schematics below Please find another post here where I realized, using Shelly 1 and NodeRed , the regulating of the underfloor !!

There are many displays for Raspberry Pi  and  following some of the manufacturers instructions isn't always so easy. But there are scripts available which will make it very simple. As an example, in this post, I will install the LCD touch display from Joy-IT RB-TFT3.2-V2. The size is 3,2" with a resolution of 320 x 240, has a touch display and comes with 3 buttons.

Updated 2023-10-27 ! ! The latest information on Homebridge update is found here !   Start updating the Homebridge(HB) installation , after You logged on to the  RPi, with; sudo apt update &&  sudo apt full-upgrade  -y If You are using HOOBS or Homebridge with UX their updates can be done via respective GUI interface. HB also have a function to update Node.js . In other words, the info below is more like "nice to know".

At higher outputs, current, from the batteries I had detected an increasing voltage drop. So I decided to change and update the supply cables from the batteries, see picture, to a more correct solution.  The solution was Cable lugs on all cables The lug is crimped and soldered to the cable Heat shrink tubes, with glue, to cover the transition between the lug and cable Battery terminals with M10 distributer

A  newer post  on the same subject !! If You want to capture Your data from a sailing trip there are several ways. Here I will check out these SignalK delta, via plugin signalk-data-logger   NMEA 0183(N1), via netcat NMEA 2000(N2), via  actisense-serial If you then want to use these files as input for OpenPlotter, OpenCPN or SignalK  check out this post .

A  newer post  on the same subject !! The easiest way to test Your OpenPlotter, OpenCPN or SignalK(SK) applications is to use the supplied sample files in SK. Another way is to capture Your own data from a sailing trip, which is described here . Then You can use them instead of the supplied sample files.

There have been some questions about how to handle Homebridge, (HB), autostart at power on and restart at failure using Raspberry Pi OS  systemd .  Please note that, in the later versions, the HB installation handles this !! I have written a post how to manually set it up but now in this post I will present a script which handles it automagically !!  Despite this simple set up I recommend using the app " hb-service", which is installed together with "homebridge-config-ui-x" How to install HB is found here !