hello! I was working with this model of RAK 811 LoRa enabled chip and, tried to use this forum and the hackster one; neither had the information as i needed, so im going to try to put it clearly so everyone else can make the node work without all the hassle:
first of all you need to flash the correct firmware to the RAK811 board, this is the link where you can find all the software and the firmware to do this: https://github.com/RAKWireless/RAK811/tree/master/AT Firmware
then you shoud use an arduino MEGA if for some reason you can´t find one you can use software serial but be aware that you need to use it as a separate function to call it when necessary and for the software serial to be able to interrupt whatever the arduino is doing at the moment.
when pluging the board to the arduino bend all the pins in the right side( the one side that has the rx and tx) and then proceed to connect a jumper cable from the rx2 and tx2 of the mega(in my case i decided to use rx3 and tx3 due to space constrains on the device) or the pins that you defined as the software serial to the shield this way:
where tx3 is connected to tx pin and rx3 is connected to rx pin on the rak.
the jumpers on the board should be connected this way:
so the voltages on the arduino wont damage the shield and the commands sent by the arduino make it to the actual chip and not the serial monitor on the usb line of the arduino.
Thanks for the tool, it is indeed great to test all AT commands !
Unfortunately, I have to use my Nano and I'm actually writing my own library because I want to send a particular type of data through LoRa (data one are measured by the sensors connected to my Nano).
To receive it, I have a private Gateway and I analyze those data through a Raspberry (the one that handles the gateway).