Version 36 (modified by 9 years ago) ( diff ) | ,
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Energy and Power test
Hardware
1x Board : Raspberry PI 2 model B
4x Wifi : Edimax model EW-7811USC
1x Storage : Sandisk Ultra 16Gb micro SD class 10
1x Power : USB to microUSB 8A / 5V / 40w (Xtorm XPD07)
1x Cable : USB to microUSB fastcharge cable 2.1A at 1.2m 1x (Behello BEHCBL0015)
1x Monitor : Portapow Premium USB + DC Power Monitor
2x Monitor : Maxxter USB power meter
1x Meter : Fluke 79III (niet gecalibreerd) [[BR]
Software
Raspbian Lite : https://downloads.raspberrypi.org/raspbian_lite_latest (March 2016 / 2016-03-18 / Kernel 4.1) Wifi Driver : https://dl.dropboxusercontent.com/u/80256631/8812au-4.1.18-v7-846.tar.gz Source Driver : https://github.com/gnab/rtl8812au
Testing Setup
We hebben de Portapow direct aangesloten op onze USB power supply van Xtorm middels de bijgeleverde USB kabels.
Op de test aansluitingen van de Portapow hebben we een Fluke 79III aangesloten om de spanningen te vergelijken (mogelijk verschillen in spanning)
De USB uitgang van de Portapow sluiten we direct aan middels een 1.2 meter lange USB to Microusb kabel aan op de Raspberry PI 2 model B
Installed packages
pi@raspberrypi:~ $ sudo apt-get update pi@raspberrypi:~ $ sudo apt-get install htop pi@raspberrypi:~ $ sudo apt-get install hostapd isc-dhcp-server pi@raspberrypi:~ $ sudo apt-get install ebtables
Meetingen zonder Wifi Traffic en standaard Raspbian Lite OS
Verschil spanning tussen de portapow en Fluke 79III is max 0.01 volt geconstateerd.
Aangesloten | Portapow | Fluke 79III | Verschil | Stroom | Vermogen | Opmerking |
---|---|---|---|---|---|---|
Niets | 5.0593 V | 5.06 V | 0.0007 V | 0 A | 0 mW | Niets op de USB uitgang aangesloten |
RB PI 2B | 5.0524 V | 5.06 V | 0.0076 V | 0.0706 A | 356 mW | RB PI 2 B |
RB PI 2B + SD | 5.0393 V | 5.04 V | 0.0007 V | 0.2087 A | 1.051 W | RB PI 2B + SD Raspbian |
RB PI 2B + SD + DVI | 5.0392 V | 5.04 V | 0.0007 V | 0.2095 A | 1.056 W | RB PI 2B + SD Raspbian + DVI |
RB PI 2B + SD + DVI + UTP | 5.0345 V | 5.04 V | 0.0055 V | 0.2597 A | 1.307 W | RB PI 2B + SD Raspbian + DVI + UTP |
RB PI 2B + SD + 3x Wifi + UTP | 5.0278 V | 5.03 V | 0.0022 V | 0.3349 A | 1.755 W | RB PI 2B + SD Raspbian + DVI + UTP + 3x Wifi |
RB PI 2B + SD + 4x Wifi + UTP | 5.0259 V | 5.03 V | 0.0041 V | 0.3585 A | 1.802 W | RB PI 2B + SD Raspbian + DVI + UTP + 4x Wifi |
SD betekend dat er een SD kaart is geplaatst met de standaard Raspbian OS op geinstalleerd
DVI betekend dat er een monitor op de DVI aansluiting is aangesloten.
Wifi - Usb Wifi adapter geplaats zonder dat deze geconfigureerd is.
Binairy Wifi Driver installeren
pi@raspberrypi:~ $ wget https://dl.dropboxusercontent.com/u/80256631/8812au-4.1.18-v7-846.tar.gz converted 'https://dl.dropboxusercontent.com/u/80256631/8812au-4.1.18-v7-846.tar.gz' (ANSI_X3.4-1968) -> 'https://dl.dropboxusercontent.com/u/80256631/8812au-4.1.18-v7-846.tar.gz' (UTF-8) --2016-03-22 20:39:10-- https://dl.dropboxusercontent.com/u/80256631/8812au-4.1.18-v7-846.tar.gz Resolving dl.dropboxusercontent.com (dl.dropboxusercontent.com)... 45.58.74.165 Connecting to dl.dropboxusercontent.com (dl.dropboxusercontent.com)|45.58.74.165|:443... connected. HTTP request sent, awaiting response... 200 OK Length: 746473 (729K) [application/octet-stream] Saving to: '8812au-4.1.18-v7-846.tar.gz' 8812au-4.1.18-v7-846.tar.gz 100%[=======================================================>] 728.98K 1.49MB/s in 0.5s 2016-03-22 20:39:12 (1.49 MB/s) - '8812au-4.1.18-v7-846.tar.gz' saved [746473/746473] pi@raspberrypi:~ $ ls 8812au-4.1.18-v7-846.tar.gz pi@raspberrypi:~ $ gunzip 8812au-4.1.18-v7-846.tar.gz pi@raspberrypi:~ $ ls 8812au-4.1.18-v7-846.tar pi@raspberrypi:~ $ tar xvf 8812au-4.1.18-v7-846.tar 8812au.ko 8812au.conf install.sh pi@raspberrypi:~ $ ls 8812au-4.1.18-v7-846.tar 8812au.conf 8812au.ko install.sh pi@raspberrypi:~ $ sudo ./install.sh sudo cp 8812au.conf /etc/modprobe.d/. sudo install -p -m 644 8812au.ko /lib/modules/4.1.18-v7+/kernel/drivers/net/wireless sudo depmod 4.1.18-v7+ Reboot to run the driver. If you have already configured your wifi it should start up and connect to your wireless network. If you have not configured your wifi you will need to do that to enable the wifi. pi@raspberrypi:~ $ sudo reboot
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Screen Shot 2016-03-29 at 20.44.29.jp2
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Commandline testing
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20160329_212332_resized.jpg
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Three accesspoint full load and full CPU load
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