I am a beginner and trying to understand how to make use of the raw signal which has been recorded by my FZ. The traffic which I am trying to capture is wM-Bus traffic with the following specs:
Wireless M-Bus (C-Mode)
Modulation FSK
Frequency Band 868,95 MHz
Encryption AES128 Mode 5
Standards 2014/53/EU (RED)
EN 13757-3/4:2013
OMS 4.0.2
According to some sources online, the frequency deviation is supposed to be min. 33,75 kHz and max. 56,25 kHz. But the data that I have recorded is always a positive integer and varies a lot (see the table below). How does one understand what is a 0 and a 1 in this encoding when there is no “-45” and “45” values that indicate the respective binary bit but only positive integers? To those with a trained eye, does the table below, and part of my captured data, make any sense or display any pattern?
Pulses 1508× 52.6 ±3.0 µs 1360× 78.4 ±13.5 µs 783× 113.3 ±21.0 µs 265× 175.6 ±53.5 µs 124× 267.4 ±64.0 µs 43× 403.0 ±79.0 µs 10× 563.8 ±88.0 µs 3× 722.7 ±60.0 µs
Gaps 53× 53.2 ±3.0 µs 159× 84.7 ±15.0 µs 67× 107.7 ±5.0 µs 223× 148.7 ±37.0 µs 66× 189.7 ±11.0 µs 311× 252.9 ±58.0 µs 294× 386.9 ±94.0 µs 274× 595.6 ±186.0 µs 155× 835.1 ±106.0 µs 362× 1156.2 ±269.0 µs 170× 1575.4 ±217.0 µs 449× 2186.7 ±524.0 µs 493× 3381.5 ±803.0 µs 474× 5136.8 ±1194.0 µs
Periods 439× 483.6 ±116.0 µs 324× 250.8 ±63.0 µs 323× 731.0 ±149.0 µs 248× 345.1 ±56.0 µs 140× 168.1 ±35.0 µs 376× 1105.6 ±254.5 µs 335× 1634.0 ±413.0 µs 18× 118.7 ±15.0 µs 411× 2376.1 ±645.0 µs 406× 3404.9 ±980.5 µs 393× 4749.4 ±1319.5 µs 304× 6466.8 ±1752.0 µs 228× 8875.6 ±2645.0 µs 129× 13147.4 ±2949.0 µs 15× 18413.1 ±1679.0 µs
Timings 405× 351.3 ±79.0 µs 490× 216.7 ±50.5 µs 1672× 81.0 ±16.5 µs 872× 120.4 ±29.0 µs 28× 276.4 ±6.5 µs 1561× 52.6 ±3.5 µs 277× 600.6 ±173.0 µs 71× 466.1 ±71.0 µs 169× 162.3 ±13.5 µs 363× 1156.2 ±269.0 µs 153× 836.2 ±104.0 µs 449× 2186.7 ±524.0 µs 170× 1575.4 ±217.0 µs 493× 3381.5 ±803.0 µs 474× 5136.8 ±1194.0 µs
Partial captured Data (Full dataset captured is 1h of RF):
Filetype: Flipper SubGhz RAW File
Version: 1
Frequency: 868950000
Preset: FuriHalSubGhzPreset2FSKDev476Async
Protocol: RAW
RAW_Data: 311 -208 77 -362 79 -138 269 -400 105 -128 77 -226 221 -282 77 -80 79 -242 397 -213 105 -134 79 -82 53 -80 79 -136 321 -322 133 -826 402 -538 240 -218 111 -110 109 -82 213 -292 135 -156 253 -136 111 -309 193 -383 79 -134 79 -536 245 -236 161 -482 295 -482 81 -271 53 -1206 77 -162 53 -82 55 -54 131 -160 105 -56 83 -162 239 -330 135 -54 81 -132 81 -347 77 -288 213 -240 79 -454 105 -673 81 -292 107 -214 211 -134 103 -245 81 -158 354 -174 482 -98 121 -404 197 -253 569 -52 207 -385 429 -126 203 -98 201 -418 217 -480 133 -274 83 -136 185 -402 107 -198 275 -128 73 -172 99 -74 179 -52 75 -76 101 -670 152 -78 409 -242 217 -104 79 -152 124 -204 99 -412 788 -576 157 -290 303 -52 354 -128 101 -130 51 -52 105 -369 105 -162 137 -381 131 -420 51 -324 77 -106 131 -214 215 -362 51 -186 211 -184 377 -258 209 -290 133 -162 53 -428 77 -102 123 -246 51 -78 77 -307 173 -344 105 -312 79 -166 55 -252 79 -394 157 -80 79 -108 183 -82 237 -78 131 -374 135 -246 131 -396 135 -323 161 -134 111 -140 55 -294 101 -414 109 -54 235 -268 103 -80 79 -82 131 -286 668 -106 77 -294 237 -241 237 -472 163 -134 291 -136 185 -224 79 -108 53 -106 81 -54 712 -288 53 -212 157 -342 285 -184 179 -176 75 -204 207 -661 107 -366 305 -332 281 -360 149 -178 121 -228 105 -104 320 -108 159 -110 81 -190 107 -162 135 -220 301 -372 51 -372 51 -366 185 -376 159 -242 159 -262 129 -52 261 -80 594 -52 295 -188 157 -130 107 -292 75 -242 109 -82 133 -348 77 -244 247 -134 51 -188 403 -104 103 -294 181 -304 75 -126 51 -52 181 -52 289 -80 105 -110 163 -52 53 -130 308 -381 367 -292 521 -238 343 -585 107 -448 79 -80 371 -158 189 -298 77 -52 185 -80 283 -158 55 -401 185 -234 55 -372 185 -368 227 -268 73 -194 73 -106 131 -549 317 -430 183 -78 306 -78 129 -52 127 -510 75 -234 79 -362 207 -80 185 -296 159 -84 135 -158 53 -108 53 -631 131 -314 237 -134 107 -580 53 -156 179 -130 75 -76 101 -425 77 -202 77 -562 202 -232 337 -184 265 -246 238 -128 77 -128 105 -78 155 -134 657 -134 107 -302 133 -54 105 -342 369 -324 233 -408 101 -242 129 -400 75 -334 263 -240 79 -106 77 -184 481 -182 179 -104 101 -542 317 -180 99 -200 75 -100 101 -150 125 -250 423 -106 302 -298 133 -132 81 -58 219 -80 109 -342 107 -551 159 -112 57 -166
RAW_Data: 135 -80 237 -182 103 -538 405 -158 107 -188 609 -136 249 -54 53 -80 81 -416 51 -234 131 -707 233 -821 53 -310 79 -330 131 -196 135 -434 265 -182 157 -54 131 -364 155 -104 401 -186 187 -132 53 -156 73 -76 251 -232 73 -330 99 -404 209 -80 129 -102 103 -254 131 -130 127 -150 123 -128 121 -148 73 -102 105 -210 51 -352 103 -336 77 -590 129 -52 127 -128 463 -306 155 -368 77 -484 275 -114 165 -82 191 -328 81 -440 155 -204 77 -134 163 -108 163 -82 81 -246 211 -212 85 -140 367 -950 177 -154 173 -308 51 -182 227 -198 99 -98 99 -196 181 -52 157 -134 79 -430 79 -240 55 -192 165 -543 105 -440 229 -100 103 -460 189 -82 133 -82 133 -252 133 -366 107 -108 141 -194 163 -352 103 -78 51 -78 103 -136 191 -268 191 -244 343 -186 53 -136 412 -164 161 -52 105 -80 105 -108 373 -493 75 -352 101 -102 125 -230 125 -277 199 -180 129 -360 261 -132 99 -433 103 -78 161 -110 83 -86 139 -190 189 -108 343 -246 217 -439 323 -110 213 -434 331 -203 211 -56 380 -84 109 -166 107 -355 109 -134 137 -82 277 -164 243 -160 77 -80 51 -270 103 -104 477 -1237 105 -228 129 -448 155 -270 165 -80 107 -241 51 -294 111 -400 77 -152 101 -252 211 -448 149 -154 51 -154 129 -152 101 -76 101 -98 223 -182 153 -208 53 -410 322 -106 53 -848 107 -138 217 -534 367 -168 53 -108 193 -404 159 -348 107 -286 157 -186 231 -304 611 -54 111 -136 81 -80 53 -132 135 -108 107 -424 337 -132 186 -268 131 -82 107 -82 107 -214 77 -78 187 -354 159 -272 167 -104 137 -244 51 -132 51 -164 193 -116 139 -188 77 -102 125 -423 185 -398 189 -322 55 -84 135 -54 53 -1331 163 -82 53 -160 469 -426 159 -136 137 -170 201 -138 107 -239 181 -218 113 -300 171 -246 165 -350 51 -266 79 -182 289 -352 53 -240 77 -80 161 -190 107 -268 53 -460 51 -54 77 -226 275 -533 105 -392 267 -212 103 -100 255 -216 55 -156 199 -288 101 -174 73 -152 125 -226 77 -227 229 -566 79 -78 211 -212 155 -284 153 -132 133 -348 105 -108 191 -108 79 -132 131 -444 149 -174 73 -226 155 -230 171 -100 73 -228 177 -78 77 -212 471 -406 155 -130 165 -764 229 -78 79 -108 81 -862 305 -126 103 -270 292 -634 73 -74 123 -224 99 -286 264 -76 175 -202 99 -52 103 -176 227 -228 77 -78 176 -52 207 -78 257 -188 107 -443 79 -132 81 -432 51 -456 83 -435 393 -134 219 -276 139 -249 209 -293 77 -78
How would you go about cleaning/understanding this capture?