ximport ubuntu openwrt

usb relay (ICSE013A) Here is a small and inexpensive Linux friendly USB dual relay: ICStation ICSE013A, available on ebay for less than 5 USD.

Connectors:

• USB micro-b
  • Used for power supply and USB-CDC
• 4 pin header (not soldered) :
  • Power + RS232 signals @ 3.3V
  • pinout:
    • RX (connect to master TX)
    • TX (connect to master RX)
    • GND
    • 5V (power supply)

Relay side:

• 2x 3 screw terminal
  • NO
  • C
  • NC

Onboard devices:

• 2x relay Songle SRD-05VDC-SL-C
• 1x USB to serial chip Prolific 2303HX
• 1x probably a microcontroller ??? ST78596

Serial configuration: 9600,8,n,1

Protocol: Say hello and wait some time :

 echo -n "P" > /dev/ttyUSB0 && sleep 0.5

Should reply 0xAD for dual channel

Say start and wait some time :

echo -n "Q" > /dev/ttyUSB0 && sleep 0.5

Now the module wait for binary values until power is removed.

Set values (one bit per relay):

echo -n "\x01" > /dev/ttyUSB0 && sleep 0.5

This will also work using openwrt, using this driver:

opkg install kmod-usb-serial-pl2303

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Question, remark, bug? Don't hesitate to contact me or report a bug.