Add support for AcuRite Optimus 6-in-1 (06188M) weather station — acurite_txr_decode skipping wrong len (80/81 bits)

[ox1574]

Device details

• Manufacturer: AcuRite
• Model: Optimus 6-in-1 Weather Station
• Sensor model: 06188M
• Frequency: 433.92 MHz
• Modulation: OOK_PPM

Problem
rtl_433 detects the signal (pulses visible in -A, attempts acurite_txr_decode), but rejects with "skipping wrong len" on rows of 80 bits (10 bytes) and 81 bits (11 bytes). Close to existing AcuRite 5-in-1/Atlas support (decoder

Raw Captures.zip

Current readings (example from display during capture):

• Temperature: 56 °F
• Humidity: 96 %
• Wind: 4 mph from WNW direction
• Rain: 0.02 in

Verbose output (from rtl_433 -vvv):
Test mode active. Reading samples from file: .\g001_433.92M_250k.cu8
Input format: CU8 IQ (2ch uint8)
Badly formatted OS v2.1 message: {178} 05 6a aa da aa d5 55 60 ad 55 5b 55 5a aa ac 15 aa ab 6a ab 55 55 80
Unrecognized Msg in OS v3: {178} 05 6a aa da aa d5 55 60 ad 55 5b 55 5a aa ac 15 aa ab 6a ab 55 55 80
Possible Nexus: bitbuffer:: Number of rows: 1
[00] {252} 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Possible DSC Contact: bitbuffer:: Number of rows: 1
[00] {12} c0 00 : 11000000 0000
row 0 bit count 12
DSC row 0 invalid bit count 12
acurite_txr_decode: bitbuffer:: Number of rows: 3
[00] {80} ca 94 7b 82 24 00 14 00 9f 32
[01] {80} da 94 7b 82 24 00 14 00 9f 32
[02] {81} ea 94 7b 82 24 00 14 00 9f 32 00
acurite_txr_decode: row 0 bits 80, bytes 10
acurite_txr_decode: skipping wrong len
acurite_txr_decode: row 1 bits 80, bytes 10
acurite_txr_decode: skipping wrong len
acurite_txr_decode: row 2 bits 81, bytes 11
acurite_txr_decode: skipping wrong len
acurite_986_decode: row 0 bits 252, bytes 5
acurite_986_decode: skipping wrong len
RH ASK preamble not found
acurite_00275rm_decode: bitbuffer:: Number of rows: 3
[00] {80} ca 94 7b 82 24 00 14 00 9f 32
[01] {80} da 94 7b 82 24 00 14 00 9f 32
[02] {81} ea 94 7b 82 24 00 14 00 9f 32 00
philips_callback: wrong number of bits (253)
Interlogix: Preamble not found, bit_offset: 80
Interlogix: Preamble not found, bit_offset: 80
Interlogix: Preamble not found, bit_offset: 80
RH ASK preamble not found
AmbientWeather-TX8300: wrong size (252 bits)
Pulse data: 253 pulses
Test files
Attached zip file of raw .cu8 captures

Additional info

• Link to weather station: https://www.acurite.com/collections/optimus-weather-station-bundle/products/acurite-optimus-weather-station-with-wi-fi-hd-display

[acurite_txr_decode] ext. Debug info: num_rows (3)
[acurite_txr_decode] ext. Debug info: bits_per_row (80)
[acurite_txr_decode]ext. Debug info: row 0 bits 80, bytes 10, extra bits 0, msg type 0x3a
[acurite_txr_decode] Unknown message type
codes : {80}ca94fa821df300009f89

the message type 0x3a is not decoded yet..
nearest is 0x38, but CHS mismatch..

edit:
this AcuRite Optimus 6-in-1 needs his own decoder, the layout is different from all known types
see this BitBench with the above codes/cu8:
?Humidity is always the same !?, so its hard to find the CHS/CHK code.
edit: after Invert CHS seems to be a simple ADD with carry over 72 bits (&0xff)

https://triq.net/bitbench#c=%5BNOT%20inverted%20codes%5D&c=%7B80%7D356b847e9aafebff603d%20%5Bg001%5D&c=%7B80%7D356b057de20cffff6076%20%5Bg002%5D&c=%7B80%7D356b847e9aafebff603d%20%5Bg003%5D&c=%7B80%7D356b057e2290ffff603b%20%5Bg004%5D&c=%7B80%7D356b847e99cfebff605c%20%5Bg005%5D&c=%7B80%7D356b057e220cffff60b7%20%5Bg006%5D&c=%7B80%7D356b847e9a3febff60cd%20%5Bg007%5D&c=%7B80%7D356b057e2214ffff60bf%20%5Bg008%5D&c=%7B80%7D356b847dd8cfebff609a%20%5Bg009%5D&c=%7B80%7D356b057de214ffff607e%20%5Bg010%5D&c=&c=%7B80%7D356b057de2887bff606e%20%5Bg020%5D&c=%7B80%7D356b847e9acfebff605d%20%5Bg025%5D&c=%7B80%7D356b057e2214ffff60bf%20%5Bg030%5D&f=CHAN%3F%3A2b%20SEQ%23%3A2d%20ID%3A12d%20%3F1b%20BAT%3A1b%20MSG%3F%3A6h%20hhhhhhhhhh%20HUM%3F%3A8h%20CHS%3A8h&z=1&i=true&cf=ADD&cl=72&cw=8

@ox1574,
to finish this, pls give us a few codes with exact Temperature, Humidity, Wind and rain.
thx

edit:
a few steps later:
as u can see in BB
this AcuRite Optimus 6-in-1 has 2 message types 0x3a and 0x3b
0x3a has Wind Speed, Temperature, Relative Humidity in Byte 5,6,7 and 8
0x3b has Wind Speed, UV and Lux data in Byte 5,6,7 and 8
but im not 100% sure.. (Lux Data is somehow crazy..)
really need some more codes .

[ox1574]

@ox1574, to finish this, pls give us a few codes with exact Temperature, Humidity, Wind and rain. thx

edit: a few steps later: as u can see in BB this AcuRite Optimus 6-in-1 has 2 message types 0x3a and 0x3b 0x3a has Wind Speed, Temperature, Relative Humidity in Byte 5,6,7 and 8 0x3b has Wind Speed, UV and Lux data in Byte 5,6,7 and 8 but im not 100% sure.. (Lux Data is somehow crazy..) really need some more codes .

How would you like me to get that info exactly?

hi @ox1574,
thx for your codes and the question.
with your codes u gave us one note:

Temperature: 56 °F
Humidity: 96 %
Wind: 4 mph from WNW direction
Rain: 0.02 in

this helped us to find the two message types and the CHS check is done.
Now for the data layout , the Parity bits must be detected.
PLS send us a cu8 (or more if u can) with different values.
Note the Temperature, the Humidity (really 96%?), the WindSpeed, UV index, Ligthning and rain value
or the remaining codes
codes : {80}356b847ddbffebff60cd, {80}256b847ddbffebff60cd, {81}156b847ddbffebff60cd8
and post it here together with the CU8/codes
perhaps make a photo of your monitor with the values..

Cover the UV/lightning sensor , also lock the wind rotor for 60 seconds (if possible), this will help to get the values..

im shure we can build a decoder for this.
thx

Early Alpha, message 0x3b nearly done

[ox1574]

Yes, the humidity yesterday was as high as 99%! Current readings on the display:
Temperature: 51 °F
Humidity: 83 %
Wind: 10.5 mph from NNW direction
Rain: 1.56 in

Attached some new cu8 files

Raw Captures 2.zip

thx,
a quick log looks good:
give me some time to analyze, Humidity is maybe wrong.
Sometimes Acurite Atlas takes it over with wrong values.
test it for yourself:
rtl_433 -R40 g001_433.92M_250k.cu8 gives values for message 0x3a, but Parity check is wrong.

nearly done, Humidity was hidden between 2 Parity bits, that took time..
part of message 0x3b:
uint8_t humidity = ((b[6] & 0x1f) << 2) | (b[7] >> 6);
same for temperature, unresolved for now.
@zuckschwerdt
code: {80}ca947b05a90ab4904419
b[4] = 0xa9
b[5] = 0x0a
int temp_raw = (b[4] & 0x0F) << 7 | (b[5] & 0x7F);
float tempf = (temp_raw - 400) * 0.1f;
what could be wrong? should be 51 °F , my result is 76.2 °F ?

[ox1574]

I believe I had temp, wind speed, and potentially direction decoded properly using the following:

Wind message (0xb8) - Temperature, Wind Speed, Wind Direction

if msg_type == 0xb8:
    dir_idx = b[3] & 0x0F
    wind_speed = (b[8] & 0x3F) / 10.0
    
    b6 = b[6]
    temp_str = ""
    if b6 != 0xFF and (b6 & 0x20):
        temp = (b6 & 0x3F) - 2
        if 0 < temp < 120:
            temp_str = f"TEMP: {temp}°F | "
    
    print(f"[{time_str}] {temp_str}WIND: {wind_speed:.1f} mph {COMPASS[dir_idx]}")

thx for comment, but irritating for me,
i work with the inverted 10 bytes codes, only then the CHS/CRC check makes sense
Acurite Acurite Optimus 6n1 has 2 messages
msg: 0x3a codes: {80}ca94fa845c3650904492
msg: 0x3b codes: {80}ca947b05a90ab4904419
the 2 messages are 0x3a (58) and 0x3b (59)
NOT 0xb8 as u found ?
temperature is a int16 11bit value
int temp_raw = (b[4] & 0x0f) << 7 | (b[5] & 0x7f);
float tempf = (temp_raw - 400) * 0.1f;
b[6] in in your formula is an 8 bit INT and cant be the temperature.
b[8] has the same value in all your codes and
is prob. the lightning strike Count and the lightning Distance, but in no way wind speed

in short i will give u my decoder for testing purpose, then we will see..

[ox1574]

Thanks, just send me your decoder when ready to test.

need some time, im busy atm. but i dont forget you..
One question, i cant find strike_count and strike_distance in the Optimus specs.
Does your monitor have these values ? , if Yes- which dimension (yards, miles,km?)
There are some more unknown flags like radio interference flag , dont know how to handle..

[ox1574]

No problem. The display shows last strikes in hours ago, strikes per year. The iOS app does show # of strikes in miles.

ok, thx , so i take b[7] and b[8] for strikes total and strike distance in miles.
we can fine adjust this later.. in between there are 2 unknown flags , i ignore them for now.

if u have physical access to the device, pls lock the windrose to 360° or 180° NNN/SSS
and cover the light sensor with a dark blue rag, i need uv 0 and Lux 0,
post 6 messages / cu8 here. thx