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RFXCOM Slave Receiver?
Posted: Sun Apr 06, 2008 10:20 pm
by skyewright
Hello,
Should Meteohub be able to communicate with an RFXCOM receiver board that is a SLAVE rather than a MASTER?
If not, would handling of SLAVE boards be possible in future releases?
There is a reason for this question! It's a long story...
Re:RFXCOM Slave Receiver?
Posted: Sun Apr 06, 2008 11:53 pm
by admin
Hi,
I never tried this. What makes a \"slave\" receiver different from the \"master\" one in terms of reading/sending data to it? the 70003 just has a serial-to-usb bridge from FTDI in it. apart from that it is pure data streaming in and out, like serial. having two receivers it will need some kind of a protocol to separate these or the two open up two separate serial ports in the linux? No idea...
Re:RFXCOM Slave Receiver?
Posted: Mon Apr 07, 2008 10:19 am
by skyewright
admin wrote:Hi,
I never tried this. What makes a "slave" receiver different from the "master" one in terms of reading/sending data to it? the 70003 just has a serial-to-usb bridge from FTDI in it. apart from that it is pure data streaming in and out, like serial.
There is still just one serial port.
Judging from looking at the data in RFreceiver I believe the difference is simply that data from the SLAVE has a flag set, e.g.
50FA2814EE900070D85F83
decodes as: TH2[60929] THGR810 CH 1 addr:EE temp:0.9°C | 33.62°F hum:87 Wet bits=80
D0FA2814EE900070D85F83
decodes as TH2[60929] THGR810 CH 1 addr:EE temp:0.9°C | 33.62°F hum:87 Wet bits=80 from SLAVE
583A0D005F8007617004453F
decodes as WIND3[24320] STR918,WGR918 addr:5F direction 78° ENE speed 6.1 m/sec 4 Bft av. speed 4.7 m/sec 3 Bft battery 100% full bits=88
D83A0D005F8007617004453F
decodes as WIND3[24320] STR918,WGR918 addr:5F direction 78° ENE speed 6.1 m/sec 4 Bft av. speed 4.7 m/sec 3 Bft battery 100% full bits=88 from SLAVE
The MASTER / SLAVE look identical to me apart from the 5 or D at the start. Without looking at and understanding a protocol definition I suspect it may just be a bit mask thing?
Re:RFXCOM Slave Receiver?
Posted: Mon Apr 07, 2008 3:03 pm
by skyewright
skyewright wrote:
The MASTER / SLAVE look identical to me apart from the 5 or D at the start. Without looking at and understanding a protocol definition I suspect it may just be a bit mask thing?[/quote]
Discussing this with Bert at RFXCOM, he confirmed that \"The most significant bit is on for a slave receiver. This bit can be seen as \"slave flag\"\"
Other than that, the data from a SLAVE receiver board is identical.