ATMEGA32 Kit

UPS on Linux

Install nut

The following example is for Tripp Lite UPS
Verify the Tripplite UPS:

# lsusb
Bus 002 Device 026: ID 09ae:2010 Tripp Lite 

Edit /lib/udev/rules.d/52-nut-usbups.rules and make sure the line below exists:

ATTR{idVendor}=="09ae", ATTR{idProduct}=="2010", MODE="664", GROUP="nut"

Reload the udev files:

udevadm control --reload-rules

My UPS definition in /etc/nut/ups.conf:

[tripplite_ups]
    driver = usbhid-ups
    port = auto
    vendorid= 09ae
    productid = 2010
    desc = "Tripp-Lite UPS"

(The library file is located in /lib/nut)

My /etc/nut/upsd.conf:
LISTEN 127.0.0.1        3493
LISTEN 192.168.25.168   3493
LISTEN 192.168.1.1      3493
LISTEN ::1              3493

Restart the driver:

$ sudo upsdrvctl start
Network UPS Tools - UPS driver controller 2.7.2
Network UPS Tools - Generic HID driver 0.38 (2.7.2)
USB communication driver 0.32
Using subdriver: TrippLite HID 0.81

If no error, that means everything is working fine.

My /etc/nut/upsd.users contains:

[upsmon]

    password = pass

    upsmon  master

My /etc/nut/upsmon.conf contains:

MONITOR tripplite_ups@localhost 1 upsmon pass master

SHUTDOWNCMD "/sbin/shutdown -h +0"

NOTIFYCMD /usr/local/bin/upsnotifyme

#NOTIFYFLAG ONLINE SYSLOG+WALL+EXEC

NOTIFYFLAG ONLINE SYSLOG+EXEC

NOTIFYFLAG ONBATT SYSLOG+WALL+EXEC

NOTIFYFLAG LOWBATT SYSLOG+WALL+EXEC

NOTIFYFLAG FSD    SYSLOG+WALL+EXEC

NOTIFYFLAG COMMOK SYSLOG+EXEC

NOTIFYFLAG COMMBAD SYSLOG+WALL+EXEC

NOTIFYFLAG SHUTDOWN SYSLOG+WALL+EXEC

NOTIFYFLAG REPLBATT SYSLOG+WALL+EXEC

NOTIFYFLAG NOCOMM SYSLOG+EXEC

NOTIFYFLAG NOPARENT SYSLOG

Restart the nut-server and client:

sudo service nut-server restart

OptiPlex-9020:/lib/udev/rules.d$ sudo service nut-client restart

                          

                                                                     

If it works, your PC can now communicate with UPS.

SBC IoT

Single Board Computer for Internet of Things now are getting more popular since Raspberry Pi.  Now we can see even 64-bit SBC with less than $40 price tag!

Following is the list of SBCs I can think of:

Maker	Model	CPU	Price	Website	Misc.
Raspberry-Pi	RPI1 Model A+	BCM2835	$25	https://www.raspberrypi.org
Raspberry-Pi	RPI1 B+		$35	https://www.raspberrypi.org
Raspberry-Pi	RPI2 Model B	BCM2836	$35	https://www.raspberrypi.org
Raspberry-Pi	RPI 3 Model B		$35	https://www.raspberrypi.org
Raspberry-Pi	Zero		$5	https://www.raspberrypi.org
CHIP		AllWinner R8 (ARM)	$9	http://www.allwinnertech.com
Pine64		Cortex-A53 AllWinner A64	$15 - $29	http://www.pine64.com
FriendlyARM	NanoPi 2 (I/O ports compatible with RPi)	Quadcore A9	$24.99	http://www.friendlyarm.com
Texas Instruments	ARM TIVA LaunchPAD	ARM Cortex M4F	$12.99	Datasheet
STM Microelectronics	NUCLEO-F103RB	ARM Cortex M3	$10.33	Product Info	Dev. Board is compatible with Arduino

I personally like the FriendlyARM as it is more open system than Raspberry Pi. Broadcom is known for being paranoid to reveal the details of their products as we can see from their datasheets. FriendlyARM is more community-friendly and provides a lot of stuff already. With the damn-cheap price and the board is ready out of the box (unlike Rpi which still needs flash card), this kit is very exciting, even more interesting than Arduino.