This page covers supporting information for users of New Packet Radio (NPR) 3.0 - the latest revision of the original F4HDK-invented New Packet Radio modem first released in 2019.

By default, NPR 3.0 firmware is configured in Client mode, To establish a link, a Client and Master is required. Setup for both is covered below.

All configuration is via the Ethernet port using telnet. Default configuration is 192.168.0.0/24, the NPR IP is 192.168.0.253 and DHCP range starts at 192.168.0.65

1. Connect an antenna or dummy load
2. Power the device using 13.8V DC
3. Connect a DHCP enabled PC to the Ethernet port
4. Open a terminal and telnet to 192.168.0.253

1. At the ready> prompt, type display config
2. Note the modulation and frequency settings, these must match the Master

1. At the ready> prompt, type display config
2. Note the modem_IP, netmask and IP_begin
3. Type commands:
   • set is_master yes
   • save
   • reboot
4. On the connected PC or network, set a manual IP within the subnet and avoiding DHCP range starting with IP_begin, e.g. 192.168.0.20
5. Validate connectivity by re-opening the telnet connection to 192.168.0.253

Flashing the firmware in NPR 3.0 requires:

1. A Windows PC
2. Installation of the stm32_vcp_driver.zip drivers
3. A Micro-USB cable
4. The new firmware (with .nfw extension)
5. The pynpr.exe program

1. Disconnect the power supply
2. Connect the Micro-USB Cable
3. Run the upgrade using either:
   • pynpr fwflash -s COM_PORT path/to/nfw.nfw
   • pynpr fwflash -s auto path/to/nfw.nfw

Original NPR Hackaday Page

Original NPR Source Files and Docs - Master

Unable to link to the Master docs using a URL - copied locally for ease of access

npr70_introduction_en_v3.6.pdf

npr_advanced_guide_v2.16.pdf

npr_specification_v2.0.pdf

Connector 1

Connector 2