Saturday, April 14, 2018

Known Issue and Solutions

KEY: MMDVM NanoPi ,duplex , hotSPOT ,Pi-Star

NO.5 motorola drop data, from Iz7GLL

NO.4.  AnyTone repeater not find error with duplex HS

Try solution: downgrade the firmware version to Official Ver1.3.3,
(AS facebook feedback, not all version firmware radio effect)

# From  
# Step by Setp

# 1) login ssh mode:
# http://pi-star/admin/expert/ssh_access.php
# default
# user: pi-star
# pass: raspberry

# Use Ctrl+C, Ctrl+V, copy the follow CMD to Web SSH windows,then press ENTER

#2) Change system to Read and Write;

#3) Download flash script
curl -OL

#4) make runable
chmod +x

#5) Stop MMDVMHost serice
sudo pistar-watchdog.service stop; sudo systemctl stop mmdvmhost.timer; sudo systemctl stop mmdvmhost.service

#6) Flash to lastest version

#7) Startup MMDVMHost service
sudo pistar-watchdog.service start; sudo systemctl start mmdvmhost.timer; sudo systemctl start mmdvmhost.service 

About AnyTone DMR Radio, Andy CA6JAU identify the reason and provide useful advise, I have feedback to AnyTone engineer and continue trace. Andy reply as follow

Hi Huang,

I’ve done several test for now. I realized that in fact Anytone radio has problems to wakeup the hotspot (your board and others duplex boards too).

I compared with GD77 and this radio wakes up the hotspot perfectly.

The problem is related with the initial CSBK frame sent by the radio at PTT startup (only in duplex mode), with the information of "Downlink Activate”.

For some reason, the firmware decodes this frame with too many errors, then is discarded by MMDVMHost, and do not enable TX (then the radio error).

Because sometimes is decoded OK, I think the problem is related with my firmware. I will need to study this in deep to find a solution. I think a proper solution will benefit this radio and others, improving RX of the CSBK frames.

Also, I noted that only with Anytone, the radio always transmits this initial CSBK at PTT startup, even if the hotspot is in TX (activated). This is not necessary, the initial CSBK is required when the duplex device is in not TX. I tested only with Anytone firmware 2.27. Good radio anyway!


NO. 3. Nano hotSPOT(BlueBox) modem not work in pi star issue

Some suggestion:

1,Check SVC led if flash,if not,contact me. (That is cause by unstable voltage,such as not enough 5V2A ) See the follow part: *Fix nanoPi firmware not reset issue
If OK,like my video:

2,Update your pi-star,login ssh mode,use follow command,
  sudo pistar-update
3,Change another Power Supply 5V2A,and use  Good quality USB power line
4,Recovery factory and configre again.
5,Reflash the newest Nano Pi-star OS.

NO.2. Fix nanoPi firmware not reset issue when power on, the way:

Enter Modify Mode
User  pi-star
Pass  raspberry
Make OS writeable,execute  : rpi-rw
Edit rc.local
sudo nano /etc/rc.local

Insert follow script before exit 0

mount -o remount,rw /
echo 3 > /sys/class/gpio/export
echo out > /sys/class/gpio/gpio3/direction
echo 1 > /sys/class/gpio/gpio3/value
echo 3 > /sys/class/gpio/unexport
mount -o remount,ro /

ctrl+X Save and exit, Power off and Power on your nanoPi, then wait,if  SVC led flash,that mean sucess

see also

NOTE: If you do not know how to execute the script in ssh mode, then use flash Pi-star OS image of specially , need TF Card USB adapter.

NO.1 Recovery Pi-star Customized OS to Official Version

Some users feedback to me that, when pi-star auto upgrade, the YSF mode can not connect to server, after I try ,something to do ,the follow content
sudo rm /usr/local/bin/MMDVMHost;
sudo pistar-update && pistar-upgrade;

Dial Private call to 9990 or 4000 to test Parrot response voice.

Video in Youtube

more info

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