No RX/TX on MMDVM Simplex modem with RPI4? Solved!
Posted: Sat Sep 11, 2021 10:10 am
EDIT SOLVED PROBLEM:
i got a numb modem! after installing a new stm32 modem all works fine! thanks very much for fast response and very good professional help!
NEW PROBLEM:
RPi4 GPIO mount Modem-HAT i always have to reset the stm-chip to get the modem working with the rpi4.
Now i ordered an RPi3B to get out of this problem AND out of 50-60degreesCel hot CPU, without aircooling, you dont need this issues...
but i have to say with the mini-shim cooling fan i was at 45 degreesCel in a c4labs-case. not bad, but without fan -> no noise will be much better for a hotspot working all the day.
hello, may i get your help?
i have bought a RPI4 2gb and just added an MMDVM simplex modem.
Problem: i can't hear anybody talking and the hotspot don't recognices my tx from my radio?
but i can see my hotspot logged in to YSF on ysf-www-dashboard and the gatewayactivity on the pistar-dashboard works.
if someone PTT's in the booked DG-ID on my modem the RED PTT LED comes up. also the blue YSF LED comesup.
if the OM let his PTT go, the blue YSF LED is on for the 30seconds then disappears, but the red PTT LED still is on.
SVC LED is always blinking fast.
settings:
i flashed the newest pistar 4.1.5 to the sdcard an let it run.
Just hooked YSF mode.
display none.
entered Callsign/dmrid/433.625.000Mhz simplex/nodetype private/no aprs enabled.
my modemtype choice in conf.: MMDVM_HS_HAT (DB9MAT & DF2ET) for Pi (GPIO)
in adminpanel all lights green.
HS_HATv1.5.2 so it comes out of the box.
in SSH findmodem says:
Detected MMDVM_HS (GPIO): /dev/ttyAMA0 (MMDVM_HS_Hat-v1.5.2 20201108 14.7456MHz ADF70
21 FW by CA6JAU GitID #89daa20ABCD2CF01C37437A2000410F)
if i boot up the pi, the powerled on the mmdvm modem lights up green, if pistar is booted, the svc light blinks in red 5 times slow, then always fast.
i tested mmvdmcal but doesnt recognize any rx.
offset sticker on the modem says -475, which i set in. but i also tested from -500 to +500 in 50steps.
link to img: https://ibb.co/Sr5PhM7
do you know where my problem is?
i'd like to say big thanks to the help from you guys in this forum! you are doing a nice job and very friendly!
best regards
sebastian DO8SEB
i got a numb modem! after installing a new stm32 modem all works fine! thanks very much for fast response and very good professional help!
NEW PROBLEM:
RPi4 GPIO mount Modem-HAT i always have to reset the stm-chip to get the modem working with the rpi4.
Now i ordered an RPi3B to get out of this problem AND out of 50-60degreesCel hot CPU, without aircooling, you dont need this issues...
but i have to say with the mini-shim cooling fan i was at 45 degreesCel in a c4labs-case. not bad, but without fan -> no noise will be much better for a hotspot working all the day.
hello, may i get your help?
i have bought a RPI4 2gb and just added an MMDVM simplex modem.
Problem: i can't hear anybody talking and the hotspot don't recognices my tx from my radio?
but i can see my hotspot logged in to YSF on ysf-www-dashboard and the gatewayactivity on the pistar-dashboard works.
if someone PTT's in the booked DG-ID on my modem the RED PTT LED comes up. also the blue YSF LED comesup.
if the OM let his PTT go, the blue YSF LED is on for the 30seconds then disappears, but the red PTT LED still is on.
SVC LED is always blinking fast.
settings:
i flashed the newest pistar 4.1.5 to the sdcard an let it run.
Just hooked YSF mode.
display none.
entered Callsign/dmrid/433.625.000Mhz simplex/nodetype private/no aprs enabled.
my modemtype choice in conf.: MMDVM_HS_HAT (DB9MAT & DF2ET) for Pi (GPIO)
in adminpanel all lights green.
HS_HATv1.5.2 so it comes out of the box.
in SSH findmodem says:
Detected MMDVM_HS (GPIO): /dev/ttyAMA0 (MMDVM_HS_Hat-v1.5.2 20201108 14.7456MHz ADF70
21 FW by CA6JAU GitID #89daa20ABCD2CF01C37437A2000410F)
if i boot up the pi, the powerled on the mmdvm modem lights up green, if pistar is booted, the svc light blinks in red 5 times slow, then always fast.
i tested mmvdmcal but doesnt recognize any rx.
offset sticker on the modem says -475, which i set in. but i also tested from -500 to +500 in 50steps.
link to img: https://ibb.co/Sr5PhM7
do you know where my problem is?
i'd like to say big thanks to the help from you guys in this forum! you are doing a nice job and very friendly!
best regards
sebastian DO8SEB