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pascallanger / DIY-Multiprotocol-TX-Module

Multiprotocol TX Module (or MULTI-Module) is a 2.4GHz transmitter module which controls many different receivers and models.
https://www.rcgroups.com/forums/showthread.php?t=2165676&goto=newpost
GNU General Public License v3.0
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4DRC V4 (Tx: RW1608P) #644

Open dasavick opened 2 years ago

dasavick commented 2 years ago

This is the current data gathered on the 4DRC V4 drone.

Tx

RW1608P

This is currently only a guess because of similarities to the 4DRC V8 (#643). There is no visible text on the radio chip.

radio top radio bottom

Rx

I haven't quite figured it out yet.

drone pcb drone pcb close-up

dasavick commented 2 years ago

There seem to be no signal when remote is turned on. Only after pairing sequence (visible from about the half of the signal).

image

After pairing sequence (throttle up then down), there is a repeating signal at about 2474,9MHz:

image

There seems to be about 5 ms delay (4.95 ms to be exact) of the signals on 2474,9MHz:

image

Universal Radio Hacker detected PSK with 3 samples per symbol:

image

0001101101100101101101011100000101110011010010100000010001101011101101001001010101101101100100111000101111010101101010101011101 [Pause: 9532 samples]
111011001001101100110111001011111011000110010110101111110111010110101101101101001010100101101100110111000101011010101010001010000010 [Pause: 9533 samples]
11101100100110100110101101011111110001100011101011111101110101101011101011010010010110010111011011110101011010111010111111010100011 [Pause: 9532 samples]
111011011011111101111011010111101100011000110001110110011010110100010100101010110100111010001011000010101001010001011010010101010001 [Pause: 9535 samples]
1110110010011101101111010010101100110001100011000111011001111011010111110110100100100100110110011001110001011110111010101000110101001 [Pause: 9532 samples]
11000101100100111101110100101001010010100100100100101000000011101010001101001010110100111100000011010010010100110001011011010101101 [Pause: 9533 samples]
00110110010011000000010110101101011011011111011111010111011100101001010110011010110010110000011111001001011101100111010100010011111101 [Pause: 9533 samples]
110001001100100111111101001010010100001000001000001011001000110010101110101101001001011000011111101111010101100111010101001010100010 [Pause: 9531 samples]
110001001001001111011010010100000100101001001000001010000000110101010100101101101010110100010111011000111010100101010110000011101110 [Pause: 9532 samples]
001100100110011000010000110101101011010110101111101011101110010010101001001011001011000001011100100011101010010101000101010100101 [Pause: 9533 samples]
110001001001000111101110100101000000010010000010000010100000001010110101101101100000000001101101100110011100010111101101010011111100111 [Pause: 9532 samples]
1110100110110101111111011010100110010000100000000001011001000010100101011001101011001011000001011110010010111011001110100101011011100100 [Pause: 9532 samples]
0001001100100010010000100101000010111001110011100010011001101010111010101001001001001011101001110101011010111010101100101010010 [Pause: 9532 samples]
100011010011001111011010010100100101010010010000010010000000000100101110010110110010110000111110010110111011001110100100101010001001 [Pause: 9532 samples]

The pattern is a bit different when the drone is also on (every second fragment):

image

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