Farfisa_KM8262W.txt

Objective: Open door with a NodeMCU.

Images
------
Intercomunicator: http://www.farfisa-shop.co.uk/53-143-large/km8262w-b-w-videointercom-for-duo-syst-compact.jpg
Motherboard: https://imgur.com/a/fK46p

Documents
---------
Videointercoms with integrated coding for DUO system - www.farfisa.com/images/pdf/mi2334.pdf

Information
-----------
Model: Farfisa KM8262W
Serial?: G4650053
Power: 18W
Info: Two wire communication system

Components
----------
PA002005 -> 5V Chip to comunicate over PROFIBUS-DP
LM2940CT -> LDO 5V Voltage Regulator -> http://www.ti.com/lit/ds/symlink/lm2940c.pdf
C32725 -> BJT NPN Transistor
5BCYLVM
CC644
BC337 -> NPN Amplifier Transistor
P521GB -> Photocoupler
W02M -> Single Phase Silicon Bridge Rectifier

JP1
---
GC
GE
LM (GND)
LM (VCC - 34V)
A1
GN

JP2
---
[ 1 16 ]
[ 2 15 ]
[ 3 14 ]
[ 4 13 ]
[ 5 12 ]
[ 6 11 ]
[ 7 10 ]
[ 8 9  ]

1 - GND
2 - Indicate if phone is on dock or out of the dock, not necessary to display to turn on
    but don't shutdown when you put the phone in the dock. When display is on voltage here
    is 9 mV.
3 -
4 -
5 - Needed for Display ON, when display is ON voltage is 34 V.
6 - Needed for Display ON, when display is ON voltage is 12 V.
7 -
8 -

9 - 
10 - 
11 - 
12 - Needed for Display ON, when display is ON voltage is 100 mV.
13 - 
14 - Needed for Display ON, when display is ON voltage is 2.8 V.
15 - NOT USED?
16 - 5V (If not connected, intercomunicator doesn't work)


Info:

> Mininum cables connected to the front device to be able to open the door.
[1, 2, 16, 14, 12, 5, 6]

> On disconnecting PIN 1 the display turns on on the device (something similar as someones click on the door button).

> If someone click on door button, display turns on but intercomunicator don't give any ring (is silent).

> Door only unlocks if display turns on (but no image is displayed)

> Connecting only [1, 15, 16] can hear a faint sound from phone speaker.
> Connecting only [1, 2, 15, 16] can hear a louder sound from phone speaker.