RS232 Module 13.2 with DB9 Male Connector _RPI_POWER_HAT you can enable the TTL-RS485

you can enable the TTL-RS485 communication and can lay out your customized circuit on the protoboard

a diode is connected in series to prevent power backflow

if you need to supplement your Classroom pack or are learning on your own

Height (wheels assembled

They have a capacity of 1300mAh and a nominal output of 1

RS232 Module 13.2 with DB9 Male Connector _RPI_POWER_HAT you can enable the TTL-RS485The RS232M Module 13. 2 is an expansion module of RS232 serial communication with isolation, using the scheme of TD301D232H serial port conversion chip and male DB9 interface to enable the interface conversion between RS232 and TTL CMOS logic level signals, and using the F0505S 2WR3 DC DC power module to enable electrical and noise isolation functions, toggle switch and coding switch. It enables the pass through or cross switching of DB9 signal lines,