using PI with 2 serail ports?

[david_1234]

Hello ,
wanted to know
I want to be able to read data from 2 serail devices at the same time
does the PI have this option?
open 2 serail ports at the same time ? or does it have only 1 ?


Thanks ,

[DirkS]

On the standard Pi you can use 1 onboard UART at a time.
You *can* add USB serial devices.

[scotty101]

The SoC on the Pi has two UARTs however only 1 is available for general use.
(Insert lots of complex stuff about the other being used by the Bluetooth/Wifi that you probably don't care about)

You can however add a USB to UART converter or use a SPI/I2C UART to give you an extra port.

[PiGraham]

USB serial interfaces are cheap and effective to I'd go that way, but DMA controlled software serial on any gpio pin is another option.

viewtopic.php?t=35544#p446164

http://abyz.me.uk/rpi/pigpio/cif.html#gpioWaveAddSerial