RF Protokoll - Nexa/Proove (äldre, ej självlärande)

Från ElektronikWikin

Hoppa till: navigering, sök

The NEXA/PROOVE Remote Protocol

The RF remote control transmitters/receivers from NEXA and PROOVE seems to originate from ARC Technology Co Ltd, Taiwan. There are several versions of these products but they seem to share the same protocol.

Bit representation


The bit coding used by the encoder chips, for example M3E. from MOSDESIGN SEMICONDUCTOR, allows for trinary codes, ie '0','1' and 'X' (OPEN/FLOATING). However, it seems that only '0' and 'X' is currently used in the NEXA/PROOVE remotes. The high level in the ASCII-graphs below denotes the transmission of the 433 MHz carrier. The low level means no carrier.

'0' bit:
 ____              ____
|    |            |    |   
|    |            |    |
|    |____________|    |____________

|----|------------|----|------------|
   T       3T        T       3T

'1' bit:
 ____________      ____________
|            |    |            |   
|            |    |            |
|            |____|            |____

|------------|----|------------|----|
      3T        T       3T        T

'X' (OPEN) bit:
 ____              ____________
|    |            |            |   
|    |            |            |
|    |____________|            |____

|----|------------|------------|----|
   T       3T            3T       T

'STOP/SYNC' bit (Note! Longer than the data bit):
 ____             
|    |    
|    |            
|    |__________________________...____

|----|--------------------------...----|
   T                32T
        
If the time T is 350us, one data bit time is 8 T; 2.8ms.

Packet format


Each packet is made up of 12 trinary bits followed by a stop/sync bit. Packets are sent n*4 times or more.

If we call the 12 data bits b0..b11 where b0 is sent first, they will have the following meaning:

b0..b3 (4 bits) - House (address)
0000 - A
X000 - B
0X00 - C
XX00 - D
00X0 - E
X0X0 - F
0XX0 - G
XXX0 - H
000X - I
X00X - J
0X0X - K
XX0X - L
00XX - M
X0XX - N
0XXX - O
XXXX - P


b4..b7 - Unit
0000 - 1
X000 - 2
0X00 - 3
XX00 - 4
00X0 - 5
X0X0 - 6
0XX0 - 7
XXX0 - 8
000X - 9
X00X - 10
0X0X - 11
XX0X - 12
00XX - 13
X0XX - 14
0XXX - 15
XXXX - 16


b8..b10 - Unknown
0XX

b11 - Activation
0 - OFF
X - ON


Note! This work is partially inspired by the previous work done by Per Mellander and vfr (Håkan Nilsson).


Revision History


2006-10-05 Tord Andersson Created
2006-10-13 Tord Andersson Added chip manufacturer (MOSDESIGN)
2010-02-20 Tord Andersson Removed dead link to Mellander's project
2010-02-22 lgrfbs Add PRE kommand to fomat the text for wiki see "Diskussion" for link about wiki formating tips.
2010-02-22 Tord Andersson Additional formatting.
2010-02-23 Tord Andersson Added reference to vfr (Håkan Nilsson).

Personliga verktyg