RN-XV UART comms

Wireless & IoT
1

I have a RN-XV in a XBEE Regulated Explorer that I have added a pull up resistor on the DIN.

Talking to it is a PICAXE repeating a serial string of letters.

Both are set to 2400 baud. (I’ve also tried both at 9600.) The PICAXE is using True (Idle High) serial communication, which the RN-XV also seems to be using from what I measured with a multimeter. (I’ve tried Idle Low as well, doesn’t work either.)

The DIN LED on the XBEE Regulated Explorer is flashing, but D2 on the RN-XV is not.

Any ideas what is wrong? I can telnet to the RN-XV and the D2 flashes when I enter data, but the PICAXE doesn’t receive it on a serin pin (separate experiment).

The PICAXE is sending and expecting 8-N-1, I can’t locate what the RN-XV is doing in the docs. I would hope it is 8-N-1, most things are. I don’t have a scope.

Thanks, I’m low on ideas to try.

2

Figured it out, somehow. I set the flush timer to the default, I don’t know if that fixed it or if it is incidental. Either way, the final working configuration is

RN-XV:

Baudrate=9600

Flow=0x0

Mode=0x0

Cmd_GPIO=0

Picaxe: T9600 on serout

Hope that saves someone else a headache.