Search found 11 matches

by n0xlf
Fri Nov 09, 2018 1:23 am
Forum: ZUMSpot (Hat / Libre / USB)
Topic: Firmware upgrading from v1.4.7 to v1.4.8
Replies: 11
Views: 5731

Re: Firmware upgrading from v1.4.7 to v1.4.8

I experienced this same thing and momentarily disabling the screen under "MMDVM Display Type" solved it. I'm guessing because the screen is using the same serial port as the firmware update...
by n0xlf
Mon Sep 24, 2018 12:13 am
Forum: MMDVM_HS Hat(s)
Topic: Hs hat duplex no rx and no Dmr login
Replies: 18
Views: 5555

Re: Hs hat duplex no rx and no Dmr login

That board appears to be identical to what I got - I can only get it to work with the STM32-DVM modem setting in simplex mode. Duplex mode doesn't work for me at all.. like wise as well did you find a solution? It was actually my fault - I was incorrectly assuming that leaving the radio talkgroup(s...
by n0xlf
Tue Sep 04, 2018 6:16 pm
Forum: MMDVM_HS Hat(s)
Topic: Duplex mode unreliable
Replies: 4
Views: 2105

Re: Duplex mode unreliable

I have the offset dialed in pretty well (hence the low BER), so I'll give the deviation a try..Thanks!
by n0xlf
Sat Sep 01, 2018 9:19 pm
Forum: MMDVM_HS Hat(s)
Topic: Duplex mode unreliable
Replies: 4
Views: 2105

Duplex mode unreliable

I'm using a Chinese duplex HAT and have noticed that receiving for duplex mode seems to be hit and miss, depending on the radio used. My CS750 is really bad, with my TYT MD-UV390 being much better but still hit and miss at times. My BER is very low (0-0.3) and offset between RX and TX frequencies is...
by n0xlf
Mon Aug 27, 2018 2:53 am
Forum: Pi-Star General Support
Topic: Danny K MMDVM case
Replies: 2
Views: 1102

Re: Danny K MMDVM case

No - I figured that 3D printers were so prolific now-a-days that most everyone probably either has one or knows someone with one. There are 3D printing services that will do it, but I don't know the cost with those. I hadn't considered selling them since it's such a specific design, so the market is...
by n0xlf
Tue Aug 21, 2018 5:29 pm
Forum: Pi-Star General Support
Topic: Danny K MMDVM case
Replies: 2
Views: 1102

Danny K MMDVM case

A friend of mine (thanks Danny!!) is a SolidWorks genius and designed this case specifically for the Pi 3B/3B+, Chinese duplex HAT (other duplex boards may work as long as the antennas are in the same spot), and Nextion 3.5" screen. Instructions for assembly: https://docs.google.com/presentation/d/1...
by n0xlf
Sat Aug 04, 2018 10:24 pm
Forum: MMDVM_HS Hat(s)
Topic: Rx issues, mostly one radio...
Replies: 16
Views: 4975

Re: Rx issues, mostly one radio...

That's not a TX offset. Stolen from the SharkRF forums: From Connect Systems: "Selects the Reference Frequency used when receiving on the current channel. The reference frequency can be shifted to allow the radio to operate on channel frequencies that would otherwise be blocked by internally generat...
by n0xlf
Fri Aug 03, 2018 6:08 am
Forum: MMDVM_HS Hat(s)
Topic: Both timeslots on MMDVM_HS_HAT_DUPLEX?
Replies: 4
Views: 3124

Re: Both timeslots on MMDVM_HS_HAT_DUPLEX?

I can't get my duplex board to work in duplex mode at all, so I think my issue is something else beyond the mentioned topics. My TRX is blank when in duplex mode, so that's probably a good starting clue.
by n0xlf
Fri Aug 03, 2018 6:07 am
Forum: MMDVM_HS Hat(s)
Topic: Hs hat duplex no rx and no Dmr login
Replies: 18
Views: 5555

Re: Hs hat duplex no rx and no Dmr login

That board appears to be identical to what I got - I can only get it to work with the STM32-DVM modem setting in simplex mode. Duplex mode doesn't work for me at all..
by n0xlf
Mon Jul 23, 2018 7:20 pm
Forum: MMDVM_HS Hat(s)
Topic: Both timeslots on MMDVM_HS_HAT_DUPLEX?
Replies: 4
Views: 3124

Re: Both timeslots on MMDVM_HS_HAT_DUPLEX?

Here's another related post for those searching:
viewtopic.php?f=3&t=665

Looks like it's coming soon, in a way that doesn't require manual editing..