Re: Transmitting an all is well packet from sensor to main control unit

["ABLE1" <royboynospam@xxxxxxxxxxxxx>]

"Jim" <alarminex@xxxxxxx> wrote in message
news:55c5c460-6fb5-4543-9722-5aec56a13b3c@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
On Dec 30, 5:47 pm, mister accavanno <mraccavanno...@xxxxxxxxx> wrote:
> Ok, let's say the sensor is communicating with the MCU via a 315mhz,
> 433mhz, or 868mhz frequency. I understand that the system can be
> jammed and thusly the MCU will not be able to receive the (all is ok,
> I am here, everything is fine packet) from the sensor and when that
> periodic packet is sent and not received by the main control unit, the
> main unit will send out an alarm or a trouble message to the
> monitoring station. I would like to know if that is the only
> transmission that is sent by a sensor that is functioning in an armed
> mode( armed, meaning alarm has been set and home owner or business
> owner has gone home for the night). I am assuming that the sensor is
> idle except for the moments when transmitting these packets, or when a
> person passes the area which the sensor is protecting, thus
> transmitting a message to the MCU that the closed loop has been broken
> by detecting the moving heat of a person walking by it. So the
> question I am asking is: What does the sensor transmit to the MCU, and
> how often? Does it just send a burst of 315, 433, or 868mhz rf, or
> does it actually send an encrypted packet of some sort. What does that
> packet contain(a certain amount of bits, or rf pulses, or what?). And
> how often are these sent ( as in minutes, hours). I have certain
> discussions which I would like to initiate depending upon the
> responses I get from this post. I think the professionals with the
> knowledge to answer the above questions would be interested with what
> I have to say about this. Now, I am new in the alarm installing
> business, but I have noticed some things recently.

Andtheansweris:
HereishowiunderstandtheprocesstobeAtransmittersendsoutasignalthatisencryptedwithacertainnumberofdatabitsandthesedatabitscontaindatathatthereceiverinterpretsasthecurrentconditionastotheitsstatelikeopenclosedbatterygoodorbadIfthereceiverdoesnotgetthesignalonregularintervalsthenthereceiverwilltriggeratroublecodeThereisalotmoretoitbutthatisitinimpleterms.

Happy New Year

ABLE1