I`m trying to use the RSSI of RWS-374, but I don`t know how I can evaluate the information about this pin. How can do I this?
There is no RSSI function for RWS-374 the pin is for our internal testing only. During the module doesn? receive signal at 315MHz, what state on Digital output of 2pin? High or Low?
RWS-374 is only a RF as interface, so it is not related with digital output of HI & LOW. During the module doesn't receive signal at 315MHz, what state on Digital output of 2pin? High or Low?
RWS-374 is only a RF as interface, so it is not related with digital output of HI & LOW.

In file “bad 1" there are four graphs:

In graph # 1 : is in 5mSec and represent a GOOD receiver which its data output is clean and good.

In graph # 2 : is also in 5mSec and represent a BAD receiver which some of the data output are missing in the meddle and it is marked with a red arrow.

Graph # A : Represent the GOOD receiver but in 2mSec to show you the good output.

Graph # B : Represent the BAD receiver but in 2mSec to show you the point by the red arrow where the data is missing.

In file " bad2" there are four graphs:

In graph # 1 : is in 5mSec and represent a GOOD receiver which its data output is OK.

In graph # 2 : is also in 5mSec and represent a BAD receiver which many data output are messing and it is marked with a red "X".

Graph # A : Represent the GOOD receiver but in 2mSec to show you better a better picture of the good output.

Graph # B : Represent the BAD receiver but in 2mSec to show you one part of the output that the data is messing - marked with red "X".

In file " GOOD RF " there are four graphs:

In graph # 1 : is in 5mSec and represent one sample of a GOOD receiver with data output is OK, that you send us for evaluation before the shipment.

In graph # 2 : is also in 5mSec and represent another good sample that you send us before the shipment was made.

Graph # A : Represent the GOOD first sample receiver but in 2mSec.

Graph # B : Represent the second GOOD sample receiver but in 2mSec.

 No reply about this question. Introduction:

There are common TIME phase transpose problem for Super-Regenerative receivers. It is easily causes decode end of software can not decode due to distance (near or far) if the software works according to FSK way.

So, in general, mostly the proportion expression encode will be use in ASK low cost encoders, such as HT-12E or the IC of PIC series. In this article, we take HT-12E for example to avoid the data missing problem of receiver modules RWS-374 or RWS-371 series. Seeing the source of HT-12E first: more than 20 years ago, it was AMD CHIP use on RF remote controller all over the world.

It uses modulation and carrier frequency, adjusting and turning into 1 12KHZ and 8KHz to tell 1 and 0 signals. In this way, it can save the signal adjust of RF end, directly input to DECODER end after RF wave checking then produce by TI, as same as the encode way of HT-12E. OSC is RC, RC is the PLUG-IN, it draws low of decode IC price.

After 3 years, HOLTEK places C into the CHIP and produce HT-12E. HT-12E makes RF remote controllers in popular price until now.

Wave analysis:

As follows, there is 13BIT in HT-12E wave form. 1BIT always is 1 (1.0 signal); 2~9BIT usually use for ADDRESS or ID; 10~13BIT are controlling BIT. While the 1BIT signal is 0, the wave form will be the gray part.

As the graphs above, can find out the output of ASK DATA will have different TIME based on the distance. Therefore, in the part of software, have to take 1BIT to cont it. After cont 1BIT, divide it by 2 and then add 1BIT.

Then take CONT2 = CONT + (CONT/2) compare with the following BIT. If the following BIT is bigger than CONT2, then DATA=0; if it is smaller than CONT2, then DATA=1.

It can all be decode by this way, no matter the differences of distance or phase. Sample program as below, it can decode by CALL T assistant program. When it is 0 that RETEL reacts, represents there will be no signal.

When it is 1 that RETEL reacts, represents have signal incomes, it is quite convenient to use.

		ORG 0X00
;*******************************
;****** 1999 12 17 ***********
;****** mt_1.asm ***********
; LIN FU WEN
;*******************************
RTCC EQU 0X01
PC EQU 0X02
R3 EQU 0X03
RA EQU 0X05
RB EQU 0X06
RC EQU 0X07
CODE EQU 0X11
CODE1 EQU 0X12
CODE2 EQU 0X13
CODE3 EQU 0X14
FLAG EQU 0X15
FLAG1 EQU 0X16
FLAG2 EQU 0X17
TFLAG EQU 0X18
INST EQU 0X19
FHIN EQU 0X1A
CONT EQU 0X1B
CONT1 EQU 0X1C
CONT2 EQU 0X1D
CONT3 EQU 0X1E
CONT4 EQU 0X1F
CONT5 EQU 0X20
CONT6 EQU 0X21
CONT7 EQU 0X22
CONT8 EQU 0X23
CONT9 EQU 0X24
TEMP EQU 0X25
;FLAG2,4 IS RB5 RESTE FALG 0=REBS 1=UNREBS
;FLAG2,0 IS VT FLAG IF 0 IN 1 IS NOT
JMP MAIN
ORG 0X08
JMP INT1 int1
; *********************
; *** DECODER ***
; *********************
T:
NOP
CLR CONT1
CLR CONT3
T11:
CLR CONT
CLR CONT2
T2:
JBC RA,3
CLR CONT
MOV A,@0XF0
SUB A,RTCC
JBS R3,0
JMP T2
CLR RTCC
INC CONT
MOV A,@0X18 ;24 IS MAX
SUB A,CONT
JBC R3,0
JMP T3
JZ CONT1
JMP T2
RETL @0X00
T3:
CLR CONT
T31:
JBC RA,3
JMP T4
MOV A,@0XF0
SUB A,RTCC
JBS R3,0
JMP T31
CLR RTCC
JZ CONT1
JMP T31
RETL 000H
T4:
JBS RA,3
JMP T45
JZ CONT
JMP T4
JMP T2
T45:
JBS CONT2,4
JMP T5
MOV A,CONT
SUB A,TEMP
JBC CONT2,3
JMP T41
JBS R3,0
JMP T42
RRC CODE2
JBS R3,0
CLR CONT3
JMP T43
T42:
RRC CODE2
JBC R3,0
CLR CONT3
JMP T43
T41:
JBS R3,0
JMP T44
RRC CODE3
JBS R3,0
CLR CONT3
JMP T43
T44:
RRC CODE3
JBC R3,0
CLR CONT3
T43:
INC CONT2
MOV A,@0X1C
SUB A,CONT2
JBS R3,0
JMP T3
SWAP CODE3
MOV A,@0X0F
AND CODE3,A ;9999
INC CONT3
MOV A,@0X03
SUB A,CONT3
JBS R3,0
JMP T11
RETL @0X01
T5:
BS CONT2,4
MOV A,CONT
MOV TEMP,A ;99999
BC R3,0
RRCA CONT
ADD TEMP,A
JMP T3
;*******************************
;* *
;* MAIN PROGRAM *
;* *
;*******************************
MAIN:
MOV A,@0X08
IOW RA
CLR RA
MOV A,@0XC0
IOW RB
CLR RB
MOV A,@0X0C
CONTW
CLR CONT2
CLR FLAG2
BS RB,3
CLR TFLAG
CLR R3
DISI
MOV A,@0XF8
IOW 0X0B
MOV A,@0X3F ;RB6,7 PULL HI
IOW 0X0D ;KEY RB PULL HI
WEN:
WENC:
WDTC
JBS RB,6
JMP SET
CALL T
AND A,@0X01
JBC R3,2
JMP WEN
MOV A,CODE
SUB A,CODE2
JBC R3,2
JMP OPEN
CLR CODE
JMP WEN
OPEN:
;****** DECODER IS OK ******
;
JMP WEN
;-----------------------------
; ORG 1FFH
; JMP MAIN
;---------------------------
		

 No reply about this question. Preface: Their have a phase place TIME skew question to receive in general ultra regeneration, if software shines the FSK way practice very easy because the distance is near, or far, it is unable to decode to form the software and decode the end, so the majority of encoder that generally uses ASK of the low price is all proportion expression codes, picture HT-12E or PIC series code IC are all, originally compile and take HT-12E as the model first mainly, use RWS-374 or the RWS-371 series model`s group not to leak one yard of questions with the favourable everybody, seeing HT-12E source first, more than 20 years ago originally, it was all AMD CHIP to use RF remote control in the whole world, it uses and adjusts and changes carrier frequency, is adjusting and turning into 1 12KHZ and telling 1 and 0 signals to 8KHZ, this way, can save the facelift signal of RF end, alright direct input is to DECODER end after direct RF detects, produce by TI fund with HT-12E the same code way now, OSC is RC, its RC is hung for outside, decode it IC price draw low, after 3 years, shut, it is HT-12E now to offer the fund, make RF shake the popular price of the accusing of device, until today.
 No reply about this question. I have a question about RWS-374-1 We are sure about there? no problem with our RWS-374 modules, the order we sent you 1kpcs and the last 10kpcs are produce together, how could they have such a big difference?Please check with your customer if they change anything on the main board or software code. or there? impossible to have this situation for 90% failed receivers.We already email this message and photo to Mr. Lin to check about this problem.Kindly advice, it? all acceptable or all unacceptable for the module under same lot, hardly for 90% unacceptable but only 10% acceptable situation.
After we checked about the photo, there are several questions please kindly advice. 1)5ms 2v for the first line, then why it comes to 2ms for the second? Is the rate over 9600bps (4.8khz) already? 2)Same question as above for the third and forth line. 3)It shows 5ms at the bottom of this photo. Please advice how many ms did the instrument selected to scan? 4)The time of asm changing a lot, so they all for proportion expression encode. If it is able to show the number of its changing, we believe that can decode from the software. If can't, it is all about the problem of software. 5)The common software skill is: after take the number of time of the first bit cont, make time + (time/2) and then can easily tell the change of 1 and 0 by comparing to the following bit number.

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