U3 - 72F324J6T6 - ST72324 - Main Microcontroller, ST7 series
U13 [https://www.ti.com/lit/ds/symlink/lmv761.pdf LMV761]<!-- U13 Package marking shows C22A. TI Part marking lookup provides LMV761. The SOT-23 footprint appears to match what is on the PCB. -->
U21 - TI/Chipcon CC1050 (TSSOP 24)
=== Notes ===
<br />
U13 Package marking shows C22A. TI Part marking lookup provides LMV761. The SOT-23 footprint appears to match what is on the PCB.
==Circuits==
RF from CC to Ant1 - coming soon