TimeLine

1. July-29-2025: Started looking at signals sent/received between the head/base of the Anytone 5888 

2. Sept-11-2025: Learning about the timing/voltage aspects of these signals.

3. Oct-11-2025: Finished designing the very first PCB, and ordered bare PCBs from JLC PCB.

4. Oct-26-2025: Assembled a couple of PCBs and started working on the Firmware.

5. Dec-26-2025: Worked out most of the bugs and came up with a stable FW.

6. Dec-31-2025: Started working on the second revision of design.

7. Jan-22-2026: Finished the design update and ordered new PCBs.

8. Jan-30-2026: Parts ordered for 10 PCBs.

9. Jan-31-2026: Received the bare PCBs, and started to assemble them.

10. Feb-06-2026: Received the remaining parts and assembled a couple of PCBs. Started working on migrating the FW. The MCU programmed fine and the power filtering circuit is working as it should. It is keeping the noisy RF transceiver well isolated from the other power rails!!!

11. Feb-15-2026: After playing with the new design a little more, found out that there are few issues with the SPI lines and audio filtering. I will be updating the design and will also be upgrading the MCU to a 48Pin Package. This should expand the capabilities of this design and then it should be able to accommodate radios where the hand-mic plugs into the Base (RF Unit) instead of the control head.

12. Feb-28-2026: I have looked at the Anytone AT-778UV, and it looks like it will work with the PCB with some minor firmware changes and a few wiring adjustments. 

13. Mar-04-2026: Was able to update the FW and got the AT-778UV's head talking wirelessly with the base. Also learned that more changes to the PCB will need to be made to accommodate this radio properly.