Hi All,
Have attached both devices in a stackable config and tried running the example sketch from the SparkFun library but keep getting prompted with "Module failed to respond. Please check wiring." in the serial monitor.
No amendments were made to the code except configuring the TX RX pins for softserial, tried 2 & 3 and 0 & 1 but still does not work.
Any assistance will be greatly appreciated, thanks!
Welcome to the forum
why are you using SoftwareSerial on the Uno R4 ? It has 2 hardware UARTs unlike the original Uno. One is named Serial and is connected directly to the USB interface and a second one named Serial1 that uses pins 0 and 1
Connect the peripheral to pins 0 and 1 and use the Serial1 object to connect to it
Thank you. I had the same problem and switching to hardware serial solved the problem for me.
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