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Domotic, Gadgets

Monitor your Raspberry enclosure

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A small gadget to monitor the power supply and enclosure temperature of your Raspberry.

My Raspberry Pi server host a OpenVPN service, Onion Pi Tor proxy access point, and EasyIOT.

The power supply come from a old Pc, and the enclosure from a plexi-glass slab.

It’s based on Arduino, so there is no schematic, sketch is available here, it’s just a Atmega328P with a DS1820 temperature sensor,
analoginput A0 is used to monitor Vcc power supply through a voltage divider.
I2C interface for LCD2x16 is wired to A4/A5 pin. You will need <LiquidCrystal_I2C.h>, <OneWire.h> libraries.

You can defined the threshold in the code, to monitor Vcc value, more or less than 5 volts for example, that the same for temperature.

Alert will be displayed on the screen, also a digitalwrite() (choice what pin you want), can drive a fanless, LED, relay to off the power-supply, or drive a Raspberry  I/O pin (emergency power-off, email alert …)

Gerber file available

Softwares

Solar Data/Propagation tool for Windows

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Based on information’s from N0NBH Solar Banners, (hamqsl.com), i have decided to build a small banner for Windows desktop (work under 7 and 10, not tested under XP, 8, anyway should work, reporting welcome), reasons are simple, i wanna a quick view of solar propagation status, just on my computer-desk, updated information’s that i can look anytime. Hamqsl.com, provide a lot of kind of banner that you can easily put on your website, but, banner for Windows 8 is not free, this for Windows Vista & 7 doesn’t work anymore because Microsoft Gadgets have been discontinued, the Windows Sidebar platform in Windows 7 and Windows Vista has serious vulnerabilities. Microsoft has retired the feature in newer releases of Windows. Instead you can use 8GadgetPack but i dislike adding crappy unknown application like this …

Right now, the application is released, it’s mainly designed for one screen configuration only, (i work for double screen configuration).

The tool is loaded at right of primary screen at every windows loading. To disable, run msconfig, and unselect solarinfo.exe

 

You can force the refresh by pressing a button, or the last information’s are loaded every 15min, minimiz/maximiz window can by done by double click on systray icon.

Top button, put the window overlaps all the other, disabled by default.

Default location software is; C:\Program Files (x86)\SolarInfo

Download SolarInfo_Setup, (the installer maybe need local admin right), also you can only run SolarInfo for a standalone using.

Software is free of use, you can redistribute.

For other kind of propagation software you can visit also, DxZone.com

Ham

UV3R+ vs. GT-3 TP MarkIII

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I have get my Baofeng GT-3TP to replace my UV-3R+ from ebay (seller uncleb2c), you can find it around 45€ (shipping included) with usb programming cable, it’s a quick review, he’s little bit more heavy but the battery is 1800Mah, the sensitivity is very better than my UV-3R+, the [MENU] is also more easier, global use is pleasant. If like me you use it mainly on local repeater, burst tone can be sended by 1750 or 2100Hz [PTT+A/B] or [PTT+Band].

Programming this radio is a nightmare, depending of chip you ‘ll got with your copy. The best way is too download CHIRP from

http://chirp.danplanet.com/projects/chirp/wiki/Download

After have launched CHIRP, select your COM port, then Vendor and Model, in my case BF-F8HP. Then Radio and Download from Radio.

 

HAMNET

Tests rapide sur Hamnet via l’AP d’F5ZEQ

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Patrick F1EBK, m’a prêté une antenne NanoBeam M5, mon QTH étant a 730 mètres a vol d’oiseau, et en vue direct du relais F5ZEQ, qui lui même est équipé d’un AP Hamnet en 5Ghz, j’ai donc tenté l’expérience.

N’ayant pas le bloc d’alimentation d’origine, j’ai commander sur ebay, un adaptateur Poe l’antenne étant alimenté directement via le câble RJ45 (24V – 500ma)

Trouvant le plastique de l’antenne fragile, mon pointage s’est effectué via un trépied photo.

Il ne m’aura fallu que quelques minutes d’ajustements pour obtenir les résultats suivants:

Quelques ping vers F5KTR

Vers F6BVP

Vers la webcam de F6KBS

La configuration de mon QTH étant ce qu’elle est, je ne peux pas monté d’AP pour le moment, il reste beaucoup a faire sur ce réseau très prometteur.

F5ZEQ sur Hamnet

Hack

Arduino POCSAG encoder 1200bp

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This maybe can help someone want to « recycle » old pocsag pager, original code from ON1ARF is available on gihub, Alex, has made a modification of the main code to ensure the running with 1200bp (original code is for 512bp), at this time i have made some successful test under Arduino 1.8.1

You can use a Arduino and a cheap Si4432 from ebay, don’t forget to insert a level shifter to ensure a 5v/3.3v conversion (if you run with Atmega under 5v), in my case i have used a RFM22 Shield from SparkFun

STEP:

Download the package

Put RadioHead and Pocsag folder into libraries Arduino folder

Edit Pocsag_1200.ino file, go to line 66 to set the frequency of your pager

Upload the sketch on your Arduino, then lunch the serial interface

The format to send a message is like this:
P « adress » « source » « repeat » « message »

Grab the last 6 digit’s of the pager, then format the message like this: P 0123456 0123456 1 TEST

Setting TX power to 6mW is almost enough to do some test, next way is to hack the receiver on UHF Ham band …

NOTE: 24/12/2019 Pager above is successfully hacked on 438.2160 with changing the first LO with a 49.152 Mhz quartz.

Related:
Un emetteur POCSAG avec Arduino et Raspberry

Retro engineering on a pager TATOO Hack