After searching for a wi-fi enabled, low cost alternative to the Shark RF Openspot, I was informed of a kit in the form of the popular Zumspot. It is available from AliExpress in China. Mine was purchased with the 1" OLED display which adds to the functionality of the unit. Upon arrival, a quick inspection of the parts indicated that they were of good quality and required only the header pins, OLED display and antenna connector to be mounted and soldered to the board. Only took about 15 minutes to complete the soldering of the parts and once put together and powered-up, an issue arose. No display! An inspection revealed that one of the header pins on the OLED was just long enough to make contact with the interior of the aluminum case when the antenna was tightened down. After resolving that problem, and a small configuration issue, it came to life!
Be sure to know that this board is used in conjunction with a Raspberry Pi Zero/W (wi-fi enabled) board that has the Pi-Star image loaded and operational so the JumboSpot can be configured. After going through the required configuration steps, and tethered to my cellphone hotspot, we're on DMR!
Parts included in the kit from AliExpress
JumboSpot mounted to the Raspberry Pi Zero/W and ready for configuration
Configured, in the case and ready to go on DMR!
Interested in building one of these?
Here are links to the basic parts needed to build and configure your own!
JumboSpot from AliExpress
Raspberry Pi Zero W
Configuration instructions **
** The above configuration document is based on the ZumSpot board **
All parameters are the same except under "General Configuration" - the Radio/Modem type should be set to:
MMDVM_HS_HAT (DB9MAT & DF2ET) for Pi (GPIO)
Refer to page 21 of the document
If your JS board is labeled with TX & RX offsets, be sure to make the changes in the Pi-Star configuration
From Pi-Star Dashboard. go to: (Admin - Configuration - Expert - MMDVM Host)