Monday, September 27, 2021

Nextion to MMDVM Hotspot

Nextion to MMDVM Hotspot


Nextion RX <---> TX HAT /USBtoTTL

Nextion TX <---> RX HAT /USBtoTTL

Nextion GND <---> GND HAT /USBtoTTL

Nextion 5V <---> 5V HAT /USBtoTTL





https://www.bi7jta.org/wiki/index.php?title=Main_Page#Nextion_to_Repeater_V3F4

Friday, September 24, 2021

Correct method for adjusting TXLevel #MMDVM_REPEATER

Correct method for adjusting TXLevel (Physical adjustment, non software adjustment). Detail method find the key words "2.5.29 Adjust TX Level with SDR" in the following link.



 

Monday, August 23, 2021

How to Buy? My blog's store and Aliexpress, eBay,

My Blog Store:

https://www.bi7jta.org/cart/

** Not need pay any platform cost, 

** Buyers from USA, Canada, Southeast Asia, Japan, Switzerland and South Africa, recommend this purchase method (except for buyers from EU countries, EU buyers recommend aliexpress store).


My Aliexpress Store:   

https://www.aliexpress.com/store/5077377

** Including 10%~15% platform cost ,local country EU IOSS TAX(if in EU), 

** In addition, IOSS tax fees from EU countries will be charged. Buyers from EU countries recommend this purchase method. 


eBay 


bi7jta@gmail.com  

Telegram +8613927458201

DE BI7JTA,73!

Monday, May 24, 2021

How to Configure your BM Static Talkgroup use API-KEY #MMDVM #DMR

1, Register your BM Network account;

2, Waiting for review, during 1 or 2 days;

3, Login and copy API-KEY 





I will post a demo video in my Youtube page ,please wait
https://www.youtube.com/wintershuang

END

DE BI7JTA
Contact me bi7jta@gmail.com bi7jta.org/cart







 

Tuesday, May 18, 2021

How to Install NextionDriver for Model 10 #MMDVM

Detail command (Ctrl +C, Ctrl +C )

#Make SD card writable
rpi-rw;  

#uninstall history NextionDriver
sudo rm -rf /usr/local/bin/NextionDriver;

cd /home/pi-star;

# clone github code, some unknow issue will cause NextionDriver service not communitication with MMDVMhost service,when use OD7LDS github new code, so this use offline zip code, the old version.
# sudo rm -rf NextionDriverInstaller;
# git clone https://github.com/on7lds/NextionDriverInstaller.git;


sudo rm -f on7lds-NextionDriverInstaller-Offline.zip*;
sudo rm -rf NextionDriver;
sudo rm -rf NextionDriverInstaller;

sudo wget https://www.bi7jta.org/files/MMDVM_Nextion/Driver/on7lds-NextionDriverInstaller-Offline.zip;   
sudo unzip on7lds-NextionDriverInstaller-Offline.zip;

# install Driver 
sudo chmod +x NextionDriverInstaller/install.sh;
sudo NextionDriverInstaller/install.sh;

echo "Done"


Buy product from me with Nextion Display  www.bi7jta.org/cart 

73 DE BI7JTA

Monday, May 3, 2021

Solved Problem MMDVM_Bridge DVSwitch "DMR, Master is closing down"

Error logs:

M: 2021-05-04 01:06:20.134 MMDVM_Bridge-20191105_V1.4.1 is running

E: 2021-05-04 01:06:30.243 DMR, Master is closing down

M: 2021-05-04 01:06:30.243 DMR, Closing DMR Network 


Fix:

vi /etc/MMDVM_Bridge.ini

[General]

Callsign=BI7JTA

Id=4600***

Timeout=180

Duplex=1 #Change Duplex from 0 to 1



Monday, April 26, 2021

Product available for sell #Repeater board V3F4 with Cable #MMDVM



  • $59.00

https://www.bi7jta.org/cart/index.php?route=product/product&path=59_62&product_id=52

PayPal

Features:

Repeater and Simplex mode change anytime , through change the RX/TX board line order.
Support MMDVM mode DMR/YSF/P25/NXDN/DSTAR/POCSAG


More demo in Youtube page https://www.youtube.com/wintershuang



















Product available for sell #Duplex Model_A : ALC_SPOT_NX

$175

Features:

Support MMDVM mode DMR/YSF/P25/NXDN/DSTAR/POCSAG

Double timeslot in DMR mode, act as a mini Digital voice repeater.

Support VHF/UFH, frequency range: 144MHz-148MHz, 420MHz-475MHz,842MHz-950MHz,  Avoid satellite frequency:  145.8~146 MHz ,  435~438.000 MHz


High-quality ECS TCXO, stable with low BER. 

http://www.bi7jta.org/cart/index.php?route=product/product&product_id=59

More demo in my Youtube page






Monday, October 14, 2019

About DMR,DSTAR,P25, NXDN YSFReflector Digital Voice Transcoding Server, MMDVM, SVXLINK


How to create an XLX_XRF D-Star Reflector 
https://sadigitalradio.com/digital-radio-how-tos/create-xlx-xrf-d-star-reflector/

How to Creating a YSFReflector
http://ks0lnk.net/?page_id=2968

How to build a Digital Voice Transcoding Server with AMBE  
https://n5amd.com/digital-radio-how-tos/build-digital-voice-transcoding-server/?fbclid=IwAR2KoV7n7jHE8olO1c0Jv6xKRCS4UXOZSF3kH7tks8vfiKUjRRL1NtQuQc4

mmdvm_svxlink-1.pdf
https://www.do0tpb.de/app/download/20307140/mmdvm_svxlink-1.pdf

P25 NXDN Ref Dashboard 
https://github.com/bi7jta/MMDVM-Install_RPT_N4IRS/tree/master/P25/P25Reflector-Dashboard

Other link 
https://github.com/bi7jta/XLX_CN


Sunday, October 13, 2019

Adjust RX/TXOffset (BER) for MMDVM HAT #PI-STAR

Why to set RXOffset/TXOffset?


How to set RXOffset/TXOffset?


Limit: 
Just for MMDVM SIMPLEX HAT, DUPLEX HAT,
not for MMDVM Repeater HAT,  adjust external radio frequency offset and RX/TXLevel instead.


Tuesday, September 24, 2019

NXDN Mode Configuration in MMDVM

Screenshots
Radio setting
 Click to view large image

Click to view large image

Click to view large image

Pi-Star setting
Click to view large image

Click to view large image

NXDN reflector list
http://www.pistar.uk/nxdn_reflectors.php
Click to view large image




Videos
Waiting upload ...
https://youtube.com/channel/UC6Us7z_gkxNKc0PcCuS7fYQ

Tuesday, September 3, 2019

Install Pi-Star OS, MMDVM OS

Install/flash Pi-Star OS, MMDVM OS, Pi-Star IMAGE
SD Card write tool , format tool, IP scan tools
https://www.bi7jta.org/files/PiStarTools/

Official website
http://www.pistar.uk/downloads/

for Raspberry Pi ZW/3B/4B
http://www.pistar.uk/downloads/Pi-Star_RPi_V4.1.2_20-May-2020.zip

for NanoPi NEO (512M/256M)
http://www.pistar.uk/downloads/Pi-Star_NanoPi_V3.4.17_09-Jan-2019.zip

For Orange Pi
http://www.pistar.uk/downloads/Pi-Star_OrangePi_Zero_V3.4.17_09-Jan-2019.zip

For Old version Raspberry Pi
http://www.pistar.uk/downloads/Pi-Star_RPi_V3.4.17_20-Jan-2019.zip

Pi-Star Config template
https://www.bi7jta.org/files/PiStarTools/Pi-Star_Config_template/




Getting Started Video Guide (by W1MSG) [[1]]  This video covers writing the SDCard image to the card, and basic setup/use of Pi-Star.
https://www.youtube.com/watch?v=B5G4gYDdJeQ



Click to zoom in