Some Suggestions before order
[EU countries, Not including Germany]
Fast deliver with IOSS Number Pre-TAX , please buy in this link,(Door to door not need clear customs)
Just Modem and cable https://www.aliexpress.com/item/4000024156472.html
Full assemble with BPi-M2u https://www.aliexpress.com/item/1005005402991913.html
Full assemble for TKR850/TKR820 with BPi-M2u https://www.aliexpress.com/item/1005005041621470.html
Can I build my Digital repeater successful? Any help?Don't worry, I have serviced many and many HAMs ,I can sure I can give you help, but PATIENCE is necessary. YOUTUBE https://www.youtube.com/winters_huang
Make it Easy!

https://www.youtube.com/watch?v=xo7t-xKQoAI
https://www.youtube.com/watch?v=irD5EHNH32k
https://www.youtube.com/watch?v=ym4J-sxuePg
https://www.youtube.com/watch?v=rvKDBZQrrCY [for FC302]
Available products:
Please contact me by EMAIL or Facebook Message, send the photos to description your requirements.








Descriptions:
Build your DMR/YSF Digital repeater, hotspot use Analog radios, such as GM338,GM340,FT-7800, IC-2820, also support DR-1X, MTR2000, Tait, see also WIKI.
Any Questions please Contact me anytime (https://www.bi7jta.org/contactus)
Helpful Reference to build your HomeBrew Digital Repeater && HopSPOT
Assemble Cases(Shared by HAMs)


BPi-M2 1GbRAM_16GbRAM: Power than and replace Raspberry Pi 3B, running Pi-Star OS



USBtoPCAdapter: for use PC Linux Windows, VMVare Pi-Star, BlueDV replace Raspberry Pi Pi-Star OS.

Diagram, USBtoTTL witout A+ extend


Pi-Star for Windows10, macOS:

TKR850 in YouTube demo
WIKI https://www.bi7jta.org/wiki/index.php?title=Main_Page#Repeater_Board
3.21 Repeater Board
3.21.1 Pi-Star Settings
3.21.2 Very Important Process: Calibration Frequency Offset
3.21.3 Simplex and Repeater diagram (Motorola 16 Pins and 20 Pins)
3.21.4 V3F4 Pinout define
3.21.5 COS LED bright means RX and TX work (in Duplex/repeater mode)
3.21.6 FT-7900/7800/8900 YAESU
3.21.7 FT-817/991/857D
3.21.8 FTM-100D/FTM-350/FTM-400D
3.21.9 DR-1X YAESU
3.21.10 Yaesu / Vertex VX-5000
3.21.11 GM3188/GM3688/CM140/CM340
3.21.12 GM338-CDM1250-CDM1550-CDM750-MCX760
3.21.13 ICOM IC-208H
3.21.14 ICOM IC-2720/IC-2820
3.21.15 GM300/M120 Motorola
3.21.16 SM50/SM120
3.21.17 GM340/GM350/GM360
3.21.18 GM950i Motorola
3.21.19 Pro5100 Motorola
3.21.20 Kenwood TK8180 TK8185
3.21.21 Kenwood TM-451E
3.21.22 Kenwood TM-D700
3.21.23 Kenwood TM-271
3.21.24 Kenwood TM-V71A
3.21.25 Kenwood TKR-820 TKR-720
3.21.26 Kenwood TKR-850 TKR-750
3.21.27 Kenwood Other
3.21.28 XPR4550/M8268/XPR5550e DMR serial radio
3.21.29 MTM5400 Motorola Tetra
3.21.30 XiR M3188/XiR M3688 DMR radio
3.21.31 Data radio FC302
3.21.32 MTR2000 Motorola
3.21.33 MCS2000
3.21.34 Tait TM8100
3.21.35 Tait TM8200
3.21.36 Tait T855-T857-T858
3.21.37 Tait TB7100
3.21.38 Huawei E403 SU450C
3.21.39 TYT-TH9000
3.21.40 Hytera RD982/RD980
3.21.41 Other Radio not test
3.21.41.1 Hytera TR960
3.21.41.2 GM660
3.21.42 Recommend Radio for MMDVM G4KLX
3.21.43 RadioCPS DMR radio templates
3.21.44 FM Analog mode
3.21.45 FM Network
3.21.46 M17 Mode
3.21.47 Upgrade firmware
3.21.48 Troubleshooting Possible Error
3.21.49 Compile firmware
3.21.50 How to Debug RX and TX
3.21.51 Adjust TX Level with SDR
3.21.52 Adjust RX Level with MMDVMCal
3.21.53 Adjust RSSI Potentiometer
3.21.54 TX/RX/RV2/RSSI Potentiometer Reference
3.21.55 Config TalkGroup WhiteList
All Ready Assemble, All in one(choose Pi Host option)




Why we need a RTL-SDR, SDPlay, RF tester for debug our devices?
https://www.bi7jta.org/wiki/index.php?title=Main_Page#Adjust_TX_Level_with_SDR
