Adding an optional RS-232 interface.
Using DTE card.
Wired to D6, D7, +3.3V, Ground on QTPy49-01 or QTPy49 card.
Pinout for J4 on QTPy49 cards:
- GND
- 3.3V
- TX, D6
- RX, D7
Tx on QTPy cards to Rx on DTE card.
Loopback on RTS/CTS lines on the DTE card satisfies hardware Handshakes.
Setup in MMBASIC
OPTION SERIAL CONSOLE GP1, GP0
Runs at 115,200 baud.
Stackup
Using 4-40 standoffs for stackup.
With DB-9 Breakout and FTDI-49MM plus DCE cards.
Discussions
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