The LimeNet Micro is a is a $329 board that combines a Raspberry Pi 3 (compute module) together with a LimeSDR radio. The LimeRFE is an amplifier and filter board accessory designed to be used with LimeSDR units. When a LimeNET Micro and LimeRFE are used together, it is possible to create a transmit capable radio system that can be used for amateur radio.
In terms of software, Daniel is using a Python script that communicates with the Limesuite API for PTT control. For transmitting IQ data generated by GNU Radio he uses limesdr_send. So far he's been able to successfully test a CW beacon, SSB voice and waterfall text generated by gr-paint.
Lime Microsystems, creators of the LimeSDR, LimeSDR Mini and LimeNET SDR devices have recently begun crowdfunding for a new product they are calling LimeNET Micro. LimeNET Micro is described as a software defined radio platform with an integrated processor for creating self contained wireless networks. In other words it is a LimeSDR LMS7002M SDR transceiver chip with an included Raspberry Pi Compute Module 3, FPGA, GNSS module, EEPROM and Flash memory attached to it.
The LimeNET Micro is capable of full duplex TX and RX (1 port each) with the typical LimeSDR frequency range of 10 MHz - 3.5 GHz. However a major difference is that the LimeNET Micro is only capable of a 0.27 MHz bandwidth, whereas other LimeSDR products are capable of bandwidths up to 30.72 MHz. One interesting additional feature is that the LimeSDR Micro comes with a GNSS module that can be used to receive GPS/GLONASS etc for high accuracy timing if required.
Some use cases that they envision LimeNET micro being useful for include:
Inexpensive enterprise and personal networks
Rural, autonomous, and resilient networks
Universal IoT communications hubs
Rapid deployment infrastructure for emergency response
Remote radio solutions for amateur radio and radio astronomy
Integration into application-specific RF appliances
Radio spectrum survey
Passive wireless geolocation
PHY and security research
The price is $269 USD and this includes a Raspberry Pi Compute Module 3. Higher end kits can be purchased which include Acrylic ($399) or Aluminum enclosures ($459).