what about GND, is it connected too?
GND is connected to GND...
I'm using this https://www.amazon.com/gp/product/B07XF2SLQ1.
TTL's pins are: DTR, RX, TX, VSS, CTS, GND
Puck -> FT232R connections are: V3 -> VCC (set at V3.3 and not V5) GND -> GND D28 -> RX D29 -> TX
(edit: changed pin TS to CTS -- misread it)
@MaBe started
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what about GND, is it connected too?