I am trying to do a simple serial TTL connection with the RAK2270 and the RAKDAP1 on the old Arduino IDE. I have first made sure that it works using my old method of an Arduino supplying 3.3V (and GND) and a TTL to serial cable to GND, RX and TX. That works I can program and get serial output.
Then I have tried the RAKDAP1 connecting 3.3V, GND, u_RX, u_TX. The port shows up on the Arduino. The RAKDAP1 folder opens, device manager says it is working properly, but no serial connection. I have tried switching RX and TX just to make sure.
Does something have to be installed? Do I have to use SWD or JTAG? Any suggestions?
By the way if I was to use SWD or JTAG the pin names are not what I am used to. Any suggestions for this second issue. (The first issue is more important.)
Found this site which explains a few things
So for SWD debugging:
Normal = RAKDAP1
SWCLK = TCK/CK
GND = GND
SWDIO = TMS/IO
VCC = 3V3
But I still need to figure out the USB serial. I think perhaps a regular USB TTL cable will work better for my use case with windows than the RAKDAP1. Does that make sense?
Can SWD be used for serial connection? I was expecting UART using RX and TX? @beegee
By the way I use the old Arduino IDE so I need the com serial port, but I also use webSerial which should allow the same serial port to be accessible from webPages.