Today I conducted a fine timestamp test. The purpose of the test was to determine the relative fine timestamp error rate between two secure concentrators. The experimental setup consisted of two secure concentrators placed 30 feet apart. Both concentrator cards…

I just finished benchmark packet signature times with new microcontroller. I’m getting much better results using the GD32E503. Here are my results: GD32E503 operating a various frequencies CPU Clock Pkt Sig time Sig/sec 8mhz 0.8 sec 20Mhz 0.317 3 40…

I just finished writing piece of firmware that controls Kompressor’s on-board GPS receiver. Kompressor uses a U-Blox ZOE-M8 GPS Receiver. I’m very pleased with the results. The system quickly gets an accurate 3D fix from cold start. I am using…

Here is a quick video demo of hardware/firmware development so far. In this video you will see several exciting thing (at lease I think they are exciting). At this point, the Secure Bootloader is functionality complete. It validates the app…

Kompressor prototype PCB can receive LoRaWAN packets! This is kinda a big deal. Receiving packets means that the RF front end, radios, and firmware are all working correctly. This is a screenshot of pktforwarder running on my test raspberry pi.…

While working with the Kompressor v1.0.0 prototype board, I have been noticing a problem with the SX1250 radio failing to go into STANDBY_XOSC mode. Not exactly sure what that means, but it seems to be related to its input clock.…

Last week I received the first 5 Kompressor Secure Concentrator hardware prototype boards. The boards were built and assembled by NextPCB (a Chinese manufacturer). The quality looks great and I really like the matte black solder mask. The build time…

Design work on Kompressor’s first prototype is nearing completion. Finishing touches will go in the next day or two. Next step is to build and assemble a few PCB boards and begin testing. Very exciting to see it coming together.…