I’ve got a pro mini and connect a SIM808 breakout via serial connection (rx/tx) and a LoRa breakout by SPI. In addition I’d like to use a seral monitor for debugging and a possibility for programming the MC.
By now I’m using a software serial für the Sim808 and a usb-TTL adapter for programming / serail monitor at the hardware serial port. But I’d like to avoid the software serial. Is that possible?
I read somewhere, that it’s possible to connect the usb-ttl adapter to the same hardware serial pins as the SIM808 and by that are able to read at least the seriell outputs of the MC, but that sounds a bit “unstable” to me. And I understood I can’t use that solution for programming.
Thanks for your advice!