In the OpenMV IDE, under Files-> Examples->OpenMV->Arduino->arduino_uart.py, I see the below
# Basic UART communications between OpenMV and Arduino Uno.
# 1) Wire up your OpenMV Cam to your Arduino Uno like this:
#
# OpenMV Cam Ground Pin ----> Arduino Ground
# OpenMV Cam UART3_TX(P4) ----> Arduino Uno UART_RX(0)
# OpenMV Cam UART3_RX(P5) ----> Arduino Uno UART_TX(1)
# 2) Uncomment and upload the following sketch to Arduino:
#
My Arduino is powered 5V and I plan to power my OpenMV with 3.7V Lipo
Question
Can I directly connect the pins as specified in the comments or do I need to level shift?