UHF RFID on M5Stack Core S3

deano82

I'm new to the M5Stack environment but I have the UHF RFID reader and a Core S3.

I'm using Arduino IDE to attempt to upload the UHF Example but i keep encountering the following error when compiling or uploading to the device.

Arduino\libraries\M5Stack\src\utility\Power.cpp:20:10: fatal error: esp32/rom/rtc.h: No such file or directory
20 | #include "esp32/rom/rtc.h"
| ^~~~~~~~~~~~~~~~~
compilation terminated.
exit status 1

Compilation error: exit status 1

This is the example i'm trying.

#include <M5CoreS3.h>

/*
 * SPDX-FileCopyrightText: 2024 M5Stack Technology CO LTD
 *
 * SPDX-License-Identifier: MIT
 */

#include <M5Stack.h>
#include <M5GFX.h>

#include "UNIT_UHF_RFID.h"

M5GFX display;
M5Canvas canvas(&display);
Unit_UHF_RFID uhf;

String info = "";

void setup() {
    M5.begin();  // Init M5Core.  初始化 M5Core
    // Serial2.begin(unsigned long baud, uint32_t config, int8_t rxPin, int8_t
    // txPin, bool invert) uhf.begin(HardwareSerial *serial = &Serial2, int
    // baud=115200, uint8_t RX = 16, uint8_t TX = 17, bool debug = false);
    uhf.begin(&Serial2, 115200, 16, 17, false);
    //   uhf.begin();
    while (1) {
        info = uhf.getVersion();
        if (info != "ERROR") {
            Serial.println(info);
            break;
        }
    }

    // max: 26dB
    uhf.setTxPower(2600);

    display.begin();
    canvas.setColorDepth(1);  // mono color
    canvas.setFont(&fonts::efontCN_14);
    canvas.createSprite(display.width(), display.height());
    canvas.setTextSize(2);
    canvas.setPaletteColor(1, GREEN);
    canvas.setTextScroll(true);
    canvas.println(info);
    canvas.println("1.BtnB Polling Card EPC");
    canvas.println("2.BtnC Select Card EPC");
    canvas.println("3.BtnA Write or Read Card Info");
    canvas.pushSprite(0, 0);
}

uint8_t write_buffer[]  = {0xab, 0xcd, 0xef, 0xdd};
uint8_t reade_buffer[4] = {0};

void log(String info) {
    Serial.println("Write Data...");
    canvas.println(info);
    canvas.pushSprite(0, 0);
}

void loop() {
    if (M5.BtnA.wasPressed()) {
        log("Write Data...");
        // uhf.writeCard(uint8_t *data, size_t size, uint8_t membank, uint16_t
        // sa, uint32_t access_password = 0);
        if (uhf.writeCard(write_buffer, sizeof(write_buffer), 0x04, 0, 0x00000000)) {
            log("Write OK");
        } else {
            log("Write ERROR");
        }
        delay(1000);
        log("Read Data...");
        // uhf.readCard(uint8_t *data, size_t size, uint8_t membank, uint16_t
        // sa, uint32_t access_password = 0);
        if (uhf.readCard(reade_buffer, sizeof(reade_buffer), 0x04, 0, 0x00000000)) {
            log("Read OK");
            log("Data Content");
            for (uint8_t i = 0; i < sizeof(reade_buffer); i++) {
                Serial.printf("%x", reade_buffer[i]);
                canvas.printf("%x", reade_buffer[i]);
            }
            canvas.pushSprite(0, 0);
        } else {
            log("Read ERROR");
        }
    }
    if (M5.BtnB.wasPressed()) {
        log("polling once");
        uint8_t result = uhf.pollingOnce();
        // polling 10 times
        // uint8_t result = uhf.pollingMultiple(20);
        Serial.printf("scan result: %d\r\n", result);
        if (result > 0) {
            for (uint8_t i = 0; i < result; i++) {
                log("pc: " + uhf.cards[i].pc_str);
                log("rssi: " + uhf.cards[i].rssi_str);
                log("epc: " + uhf.cards[i].epc_str);
                log("-----------------");
                delay(10);
            }
        }
    }
    if (M5.BtnC.wasPressed()) {
        if (uhf.select(uhf.cards[0].epc)) {
            log("Select OK");
        } else {
            log("Select ERROR");
        }
        log("Current Select EPC:");
        log(uhf.selectInfo());
    }
    M5.update();
}

Can anyone point me in the direction of whatever i'm doing wrong? I've tried installing all the relevant libraries, removing them and adding them again i get no joy from doing any of this.

Many thanks.

yuyun2000

The error you're encountering (fatal error: esp32/rom/rtc.h: No such file or directory) typically occurs when the Arduino IDE is not properly configured with the correct ESP32 board support package (BSP) or when there's a mismatch between the installed libraries and the board you're targeting (Core S3 in this case).
Here are the steps to resolve the issue:

Install or Update the ESP32 Board Support Package

Open the Arduino IDE.
Go to File > Preferences.
In the "Additional Boards Manager URLs" field, ensure you have the following URL:https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json

If it's not there, add it and click "OK."
Go to Tools > Board > Boards Manager.
Search for esp32 and install or update the esp32 package by Espressif Systems.

Select the Correct Board

After installing the ESP32 BSP, go to Tools > Board and select M5Stack CoreS3 (or the closest match if "CoreS3" isn't listed explicitly).
Ensure the Flash Mode, Partition Scheme, and other settings are appropriate for the Core S3.

Check the M5Stack Library Version

The error suggests a conflict with the M5Stack library. Ensure you're using the latest version of the M5Stack library compatible with the Core S3.
Go to Sketch > Include Library > Manage Libraries.
Search for M5Stack and install the latest version.
If you already have it installed, try uninstalling and reinstalling it.

Verify the Example Code

The example you're using includes M5Stack.h and M5CoreS3.h. Ensure these headers are compatible with your setup.
If the example is from an older version of the library, it might not work with the Core S3. Look for updated examples in the latest library documentation.

Check the Serial Port and Upload Settings

Ensure the correct serial port is selected under Tools > Port.
If uploading fails, try pressing the reset button on the Core S3 just before uploading.

Clean the Sketch Folder

Sometimes, leftover files from previous builds can cause issues. Try creating a new sketch and copying the code into it.

Debugging Further

If the issue persists, share the exact steps you followed to set up the Arduino IDE and install the libraries. This will help pinpoint the problem.

https://chat.m5stack.com/