Help!!
Goal: To scan a tag using “Example2_Read_EPC” code
Problem: Getting no response from the Arduino IDE serial monitor after uploading example code from Sparkfun Library. The monitor is completely blank.
Components:
-
SparkFun Simultaneous RFID Reader (stacked on Arduino Uno R4)
-
Arduino Uno R4
-
UHF RFID Tag 860‑960MHz KM4Q Chip ISO 18000 6C EPC Class1 Gen2
Troubleshooting: I have already tried:
-
Making sure baud rate is correct
-
Making sure connections are correct
-
Providing sufficient power (I tried using external power supply 9V Power supply and USB-C connection through Arduino R4)
-
Testing serial monitor with only Arduino using simple code (this works fine)
Code:
/*
Reading multiple RFID tags, simultaneously!
By: Nathan Seidle @ SparkFun Electronics
Date: October 3rd, 2016
https://github.com/sparkfun/Simultaneous_RFID_Tag_Reader
Single shot read - Ask the reader to tell us what tags it currently sees. And it beeps!
If using the Simultaneous RFID Tag Reader (SRTR) shield, make sure the serial slide
switch is in the 'SW-UART' position.
*/
//Used for transmitting to the device
//If you run into compilation errors regarding this include, see the README
#include <SoftwareSerial.h>
SoftwareSerial softSerial(2, 3); //RX, TX
#include "SparkFun_UHF_RFID_Reader.h" //Library for controlling the M6E Nano module
RFID nano; //Create instance
#define BUZZER1 9
//#define BUZZER1 0 //For testing quietly
#define BUZZER2 10
void setup()
{
Serial.begin(115200);
pinMode(BUZZER1, OUTPUT);
pinMode(BUZZER2, OUTPUT);
digitalWrite(BUZZER2, LOW); //Pull half the buzzer to ground and drive the other half.
while (!Serial);
Serial.println();
Serial.println("Initializing...");
if (setupNano(38400) == false) //Configure nano to run at 38400bps
{
Serial.println("Module failed to respond. Please check wiring.");
while (1); //Freeze!
}
nano.setRegion(REGION_NORTHAMERICA); //Set to North America
nano.setReadPower(500); //5.00 dBm. Higher values may cause USB port to brown out
//Max Read TX Power is 27.00 dBm and may cause temperature-limit throttling
}
void loop()
{
Serial.println(F("Press a key to scan for a tag"));
while (!Serial.available()); //Wait for user to send a character
Serial.read(); //Throw away the user's character
byte myEPC[12]; //Most EPCs are 12 bytes
byte myEPClength;
byte responseType = 0;
while (responseType != RESPONSE_SUCCESS)//RESPONSE_IS_TAGFOUND)
{
myEPClength = sizeof(myEPC); //Length of EPC is modified each time .readTagEPC is called
responseType = nano.readTagEPC(myEPC, myEPClength, 500); //Scan for a new tag up to 500ms
Serial.println(F("Searching for tag"));
}
//Beep! Piano keys to frequencies: http://www.sengpielaudio.com/KeyboardAndFrequencies.gif
tone(BUZZER1, 2093, 150); //C
delay(150);
tone(BUZZER1, 2349, 150); //D
delay(150);
tone(BUZZER1, 2637, 150); //E
delay(150);
//Print EPC
Serial.print(F(" epc["));
for (byte x = 0 ; x < myEPClength ; x++)
{
if (myEPC[x] < 0x10) Serial.print(F("0"));
Serial.print(myEPC[x], HEX);
Serial.print(F(" "));
}
Serial.println(F("]"));
}
//Gracefully handles a reader that is already configured and already reading continuously
//Because Stream does not have a .begin() we have to do this outside the library
boolean setupNano(long baudRate)
{
nano.begin(softSerial); //Tell the library to communicate over software serial port
//Test to see if we are already connected to a module
//This would be the case if the Arduino has been reprogrammed and the module has stayed powered
softSerial.begin(baudRate); //For this test, assume module is already at our desired baud rate
while (!softSerial.available()); // Wait until the port is open
//About 200ms from power on the module will send its firmware version at 115200. We need to ignore this.
while(softSerial.available()) softSerial.read();
nano.getVersion();
if (nano.msg[0] == ERROR_WRONG_OPCODE_RESPONSE)
{
//This happens if the baud rate is correct but the module is doing a ccontinuous read
nano.stopReading();
Serial.println(F("Module continuously reading. Asking it to stop..."));
delay(1500);
}
else
{
//The module did not respond so assume it's just been powered on and communicating at 115200bps
softSerial.begin(115200); //Start software serial at 115200
nano.setBaud(baudRate); //Tell the module to go to the chosen baud rate. Ignore the response msg
softSerial.begin(baudRate); //Start the software serial port, this time at user's chosen baud rate
}
//Test the connection
nano.getVersion();
if (nano.msg[0] != ALL_GOOD) return (false); //Something is not right
//The M6E has these settings no matter what
nano.setTagProtocol(); //Set protocol to GEN2
nano.setAntennaPort(); //Set TX/RX antenna ports to 1
return (true); //We are ready to rock
}
Please help, this is driving me crazy. See attached for pic of set up. Thank you!!
