I am using the LilyGo T-Call SIM800L tutorial. I need to connect my field device using a serial port. Since SerialMon is being use for debug, and SerialAT is for SIM800L, is there any more serial port left. If there is, please provide simple example to read from that port.
Yes, I think you can use a third port.
This video from Andreas Spiess explain that pretty well: https://youtu.be/GwShqW39jlE
I hope this helps.
Thanks Sara. I got the serial2 up n running. Now I have the esp32 connected to my field sensors via rs232, and to mysql on the net.
you guys at RNT sure have good tutorials. appreciate that.