Tag Archives: IP relay

DIY network mintoring temperature humidity I/O relay controller cheap

Just a short intro on this great and cheap network box that I found on ebay for $30-40. You can connect to it 8 DS18B20/DS1822 based temperature sensors, one Honeywell HIH-4000 series humidity sensor, plus few relay. And if you get in to it could program it to do automation tasks (home automation, IP relay, hydroponics, weather station, etc).

For $30 you can get this board called WebControl (8 ports), its made by cainetworks.com There are two version PLC and BRE. You can find on Ebay. The major problem is that during power up they will fire relays. Have used this for garage door, but had problem that it would open garage door during power up. Solution at bottom of this post.

Some info:
WebControl™ has 8 digital inputs, 3 analog inputs(based on 10bit A/D converter, full scale 0-3V), up to 8 optional DS18B20/DS1822 based temperature sensors, one optional Honeywell HIH-4000 series humidity sensor, 20 custom definable timers to combine and define its 8 digital output in any sequence of those combined input.
The user manual for PLC version and BRE version.
If you are not sure which one to get, get PLC version.. PLC has been more updated and has large number of users creating codes for it..

CAI WebControl logger a cool Windows program to log temperature data, as well as, control outputs. Works on PLC board only.
Customs plug-ins xapmcsWebControl and
Link 2 details

Solution to power up problem by Support Team at CAI Networks, Inc.

Thanks for writing to us. The processor during power up do reset on all the
output. That is probably the cause for the power on trigger.

If you could delay the power going to the relay board for a fraction of a
second, that will be fine. Otherwise, you will have to modify the
WebControl board by adding a 2.2k resistor and 47mF capacitor connected in
series. Between the 5V regulator and 16 pin AUX connector, there is a chip
marked U5, if you look the chip pin 22 now is grounded. Using a soldering
gun to desolder pin 22, and connect a wire from chip pin 22 to the resistor
and capacitor. The positive side of the capacitor connects to 3/3.3V
regulator output, the other end of the resistor connected to the ground.

By this modification, the output during power on will be disabled for about
0.5 second. That is good enough to get rid of processor reset caused spike
in the output.

Interesting links
+ Fix temperature sensor, sample PLC code link or link2
+ Moco is a scaleable software system for monitoring and control of analog and digital I/O points. link
+ Weather station link

Cheap Ethernet / Network relay control (the one you can find on Ebay for under $40)

This post is for Ethernet relay boards that you can find on Ebay or Amazon under $40. This is great way to start home automation. My long term plan is do home automation with these boards. At this moment I dont have time for this, if anyone does home automation using these, please email me…

My other post relating to making one by your self using old HP print server link

For $30+ you could can get this board called WebControl (8 ports), its made by cainetworks.com There are two version PLC and BRE (get PLC if newbie). You can get one on Ebay, or Amazon has it as well. I have 2 of these, one major problem is that during power up they will fire relays. Have used this for garage door, but had problem that it would open garage door during power up.

More details on CAI WebControl at my other post with more details and Windows control software.

Other options:
For $30 you could can get this NAS Network USB Storage BT download (NS K330)

YouTube video as well. Also you could run Snake OS on it.

Other more expensive setups:
For over $80 you can get this as well link $80
PoE Ethernet 8 Relay Board link, POE
link
link
link
POE version link
Wifi version link
UK Shop link, UK

Old Print Server as Ethernet relay control, cheap ethernet relay JetDirect

This could be a cheap way to start home automation project. What you need is old Print server, you can find these on ebay for $10-30. You will need a relay board as well. I plan to use this as simple home automation to control garage door, a small water pump and so on..

ConnectGear GP Print Server

HP Ject Direct

Smart Print Mini

My other post on same subject

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