• the BLINK and RANGE INIT messages aren't part of the ranging procedure, just the initial setup
• POLL message communicates the transmit delay value used in subsequent messages
• POLL ACK, RANGE, RANGE REPORT are all transmitted with a delay transmit operation

Build and upload commands

To build the STM32 based Bluepill board version, acting as TAG, run:

pio run -e bp_tag -t upload

If you want it to act as an ANCHOR run:

pio run -e bp_anchor -t upload