1. JumboSpot Official Websites
  2. JumboSpot LED status
  3. JumboSpot iRTQ Mini - a MMDVM Chinese Copy
  4. Connecting an OLED Display
  5. Rodger Clarke's Zumspot Build
  6. ZUMspot/Pi-Star Bring-up and initialization

Related Pages:
  1. RaspberryPi Zero Wireless.


JumboSpot Official Websites



The Facebook Group for the ZumSpot can be found here:
Facebook Page - mmdvm zumspot and MMDVM-Pi (jumbospot) DMR repeater construction building


JumboSpot LED status

Image JumboSpot LED on daughterboard LED status on my Jumbo spot, rev1.6 04/2018.
LED Label Color Action Description
D1 COS Yellow On while PTT on Carrier on Sense (Squelsh)
D2 PWR Green Steady Power is on
D3 SVC Red Slow Flashes Slowly After RESET button activated or power cycled flashes with a period of
about two seconds for about a minute while connecting to the host.
JumboSpot will not accept PPT transmissions in this phase.
D3 SVC Red Flashes Quickly Indicated in service (connected) to Host.
(Continues to flash during "Apply Changes" which restarts software services)
D4 PTT Red On while receiving packets
D5 D* Green DStar
D6 DMR Yellow Steady for 20 seconds On PTT yellow on for 20 seconds. I guess it means I am transmitting on DMR.
I assume the 20 secs is the time I should have the reflector locked to my ID.
How does it know this or is it just a counter? It stays on long after the
red transmit and the green receive led has expired on my transceiver.
D7 YSF Blue Yaseu System Fusion
D8 P25 Red
D9 NXDN Blue


JumboSpot iRTQ Mini - a MMDVM Chinese Copy

This is a Ebay/china MMDVM "copycat" product:
"32Bit MMDVM Hotspot Module+OLED Antenna Support P25 DMR YSF+Raspberry"
MMDVM Hotspot with the Rasperry Pi Zero mouinted in a Case

Detail Product Description:
Jumbo-SPOT-RTQ is a completely self-contained digital hotspot supporting DMR, Dstar, P25 and System Fusion communications. Fully assembled and tested in a ruggedized aluminum enclosure. All that's required for operation is a mini usb (android phone's cable) power source and a WiFi based internet connection. Pi-Star Digital Voice Software pre-loaded and easily upgraded via software.

Product Features:
- Supports PI-STAR's web based digital voice dashboard and configuration tool
- Supports all four digital amateur modes DMR,D-Star,P25 and System Fusion
- Built-in WiFi: 802.11b/g/n
- Built-in OLED system status display indicating Mode,Talk Group and Call Sign
- Built-in LED indicators for status of Power,PTT,COS and Mode
- Console port SSH 22 for root level access to the operating system
- Quad Core A7 1.2GHz Processor,512mb DDR3 RAM and 8gb TF Card
- Pocket size aluminum enclosure Features: · High performance 32-bit ARM processor
· Fully tested
· Supports DMR, P-25, D-Star and System Fusion (YSF)
· Onboard LEDs to show status (Tx, Rx, PTT, Mode)
· Up to 10mW RF power

SMA antenna connector, UHF antenna included
· Mounts cleanly on all current Raspberry Pi’s including the Pi Zero
· The firmware is pre-loaded and is easily upgraded via software.
Please do not upgrade the firmware by yourself
· Open source 3D printable case available
​Support and tested with PI-STAR

UHF420-450MHz ,VHF 144-146MHZ test frequency 439.600MHZ,



Connecting an OLED Display


NOTE: If you intend to solder an OLED display to the JumboSpot beware that some OLED pin arrangements are GND, VCC, SCL, SDA. The OLED's that I have here have this arrangement. Be sure your Vcc (Voltage) and GND are not reversed before you install and solder.
Source:http://www.hagensieker.com/blog/page/?post_id=99&title=jumbospot-dmr-hotspot This article discusses the installation of an OLED display http://hvdnnotebook.blogspot.com/2018/06/mmdvm-jumbospot-board-mods-you-may-need.html



Rodger Clarke's Zumspot Build

Rodger Clarke's Zumspot Build:



ZUMspot/Pi-Star Bring-up and initialization

A 125 page powerpoint presentation for ZUMspot/Pi-Star Bring-up and initialization
Updated for Pi-Star v4.3.15 by Dave Hull, KC6N dhull1@san.rr.com:

ZumSpot_Pistar_KC6N_20180605.pdf (local)

Index of section in the presentation:
4Part IPreparing a µSD card with a Pi-Star Image
13 Part IIConfiguring your WiFi on a pre-Imaged µ-SD card
20Part IIIBringing up ZUMspot/Pi-Star the first time
41Part IVSetting up your radios
47 Appendix A Communicating with your ZUMspot
51 Appendix B Setting the “Use DPlus for XRF” switch
55 Appendix C Setting up HotSpot support on Brandmeister
66 Appendix D Adding a Brandmeister Self Care Panel to Pi-Star
75 Appendix E Updating the Pi-Star firmware
85 Appendix F Updating the ZUMspot board firmware
93 Appendix G Alternative bring up methodology
95 Appendix H Cross Mode Operation
105 Appendix I Controlling Pi-Star from your radio
113 Appendix J Solving BER issues using offset adjustments
117 Appendix K Customizing Pi-Star Dashboard Colors
source: https://www.hamdigitaal.nl/download/algemene-informatie/ZumSpot_Pistar_KC6N_20180605.pdf

Also, WB2RCB - Digital Mobile Radio (DMR) pages are helpfull: https://www.wb2rcb.com/DMR1.htm


Glenn Lyons VK4PK
Ver:gnl20181203 - pre published v0.9