Washingmaschine/dryer ready detection
Posted: Mon Oct 22, 2012 11:03 am
I need some help here with a solution to detect if a washing maschine and a dryer is ready. I can't figure out a reasonable priced and reliable solution.
What i want is to detect when the maschine is ready with their program and signal that preferablily via RFXcom to HomeSeer.
I tried the following and rejected due reliablility issues and or pricetag
- 555 Schmitt-trigger with an LDR , also with a photo diode and send the signal via a DS10. Or using a RFXPower module.
The problems here are that when turning on the 555 module the DS10 triggers, the DS 10 more often doesn't sends a signal that is picked up, sunlight shining on the maschine is transported through the plastics and influence the reading of the LDR/photo diode.
- Open up the maschine and wire things up.
One indicator was a neon bulb so for this i have to use a relais. The other maschine have a small pcb mounted led. Opening the maschine and soldering/modifying them will void the warranty. Also it's not a nice fix because it's maschine depended. When they are replaced i have to do it all again.
- Detecting if power flows throught the cable. However its unreliable and expensive.
with a power clamp.
with an HALL sensor
- Using a power sensor between the power socket and maschine
This is the preferred solution because it's independent of what kind of power consumer is behind it, no warrenty is voided however it's a rather expesive solution for just detecting if the maschine is ready. (I need 2 of them)
I had a look at plugwise and the everspring module.
So i need a big help here please. Any suggestions here?
What i want is to detect when the maschine is ready with their program and signal that preferablily via RFXcom to HomeSeer.
I tried the following and rejected due reliablility issues and or pricetag
- 555 Schmitt-trigger with an LDR , also with a photo diode and send the signal via a DS10. Or using a RFXPower module.
The problems here are that when turning on the 555 module the DS10 triggers, the DS 10 more often doesn't sends a signal that is picked up, sunlight shining on the maschine is transported through the plastics and influence the reading of the LDR/photo diode.
- Open up the maschine and wire things up.
One indicator was a neon bulb so for this i have to use a relais. The other maschine have a small pcb mounted led. Opening the maschine and soldering/modifying them will void the warranty. Also it's not a nice fix because it's maschine depended. When they are replaced i have to do it all again.
- Detecting if power flows throught the cable. However its unreliable and expensive.
with a power clamp.
with an HALL sensor
- Using a power sensor between the power socket and maschine
This is the preferred solution because it's independent of what kind of power consumer is behind it, no warrenty is voided however it's a rather expesive solution for just detecting if the maschine is ready. (I need 2 of them)
I had a look at plugwise and the everspring module.
So i need a big help here please. Any suggestions here?