Closed renicok closed 9 years ago
I think I read somewhere that the OWL Micro + uses a slightly different protocol from the CM119, but maybe it's still Oregon Scientific v3.
Check out the last 2 comments about decoding OWL sensor data in this long rtl_433 thread: https://github.com/merbanan/rtl_433/issues/23
Maybe that helps?
Hello magellannh,
I wanted to be able to capture the signal sent by my Owl energy meter using RTL-SDR for processing on my PC. After doing some research it seems like the Owl energy meter uses the Oregon scientific protocol. After some more research I found your project and it did exactly what I wanted. After testing the software I found a problem and I hope that you would be able to tell me how to fix this.
I tested rtl-wx in server mode, but it did not pick up any data transmitted by my unit. I then ran rtl-wx in standalone mode and I saw error messages printed to the console (OWLCM119 Error). The calculated values seem to be out of range. I located the piece of code in rtl-433fm-decode.c where a check is performed to ensure that the current and total_current values are in range.
I also added some code at that point to dump the msg and bb buffers to the console in an attemt to see what is going on:
This output was produced: Message: 19, 84, 01, a0, 50, c9, 00, 90, 04, 4e, b0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, Raw: 00,00,00,58,91,20,85,0a,03,90,09,00,22,7d,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00, At that time my meter displayed 0.483 KW.
Here is another example: Message: 19, 84, 01, a0, 60, c0, 00, 00, 03, 3c, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, Raw: 00,00,00,58,91,20,85,06,03,00,00,00,cc,30,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,
This time the meter displayed 0.515KW.
I'm having a hard time trying to figure out how to process the buffer to get the consumed kilowatts. I have researched this a bit, but I could not find any way yet to successfully produce a value close to 0.483KW or 0.515KW.
I have the following meter: http://theowl.co.za/catalogsearch/result/index/?mode=grid&q=SE16 (I think it uses the CM119 sensor).
Do you perhaps know how to make sense of the msg buffer or raw buffer (bb) data?