On Monday, February 6, 2017 at 6:23:38 AM UTC-8, Tom Keffer wrote: > > I'm not sure what you're trying to do. > > Do you own a logger? If so, why would you want to use it to "pull the data > out and convert to RS232 levels?" Why not just use it directly? >
Since the RPi is 3.3 volts, the data coming from the data logger needs to be buffered to the 3.3 volt level, instead of it's current RS232 levels. > > If you don't own a logger, are you trying to avoid buying one by > connecting your VP2 directly to the RPi via serial line? If this is the > case then, yes, the serial line of more recent "Green dot" consoles gets > locked down, preventing communication. There are ways around this, but they > require some hardware. > And that hardware might be addressed by putting a MAX3232 into the circuit? > > -tk > > > > On Sun, Feb 5, 2017 at 8:48 PM, Michael Picco <[email protected] > <javascript:>> wrote: > >> Hello, >> >> I have an RPi properly configured to allow the /dev/ttyAMA0 serial port >> to work. To verify this, I've jumpered pins 8 & 10 on the RPi GPIO >> connector, so data is looped back as I type. When connecting the VP2 and >> running 'sudo wee_device' I get:"weewx.WakeupError: Unable to wake up >> Vantage console", as the last line. The VP2 firmware is version 3.15, >> which I think falls into the little trap created by the folks at Davis >> Instruments, where they don't want you using their serial port to extract >> data, unless you purchase one of their expensive add-ons (data logger). >> >> Could I be correct, in that my suspicion is a firmware problem? If so, >> the only thing I can see to do is use one of their data loggers to pull the >> data out and then convert it from RS232 levels (their data logger output) >> back to 3.3 volt levels suitable for the RPi. >> >> Does anyone else have other ideas? Am I on the right track? >> >> Thanks! >> >> Michael >> K6MLE >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "weewx-user" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] <javascript:>. >> For more options, visit https://groups.google.com/d/optout. >> > > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
