62 lines
No EOL
1.7 KiB
C++
62 lines
No EOL
1.7 KiB
C++
/**
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* @file I2CScanner.ino
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* @author Lewis He (lewishe@outlook.com)
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* @license MIT
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* @copyright Copyright (c) 2025 ShenZhen XinYuan Electronic Technology Co., Ltd
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* @date 2025-12-04
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* @note T_BEAM_S3_SUPREME If the I2C device is connected to pins 17 (SDA) or 18 (SCL),
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* the sensor power supply must be connected to DC1. If connected to other LDOs,
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* the power must be turned on before accessing the sensor I2C bus; otherwise, the I2C access will fail or freeze.
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*/
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#include <Arduino.h>
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#include "LoRaBoards.h"
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void setup()
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{
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Serial.begin(115200);
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while (!Serial);
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Serial.println("\nI2C Scanner Starting...");
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// Wire.begin(17, 18); // SDA, SCL
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setupBoards();
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}
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void loop()
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{
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byte error, address;
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int nDevices;
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Serial.println("Scanning...");
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nDevices = 0;
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for (address = 1; address < 127; address++ ) {
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// The i2c_scanner uses the return value of
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// the Wire.beginTransmission to see if
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// a device did acknowledge to the address.
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Wire.beginTransmission(address);
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error = Wire.endTransmission();
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if (error == 0) {
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Serial.print("I2C device found at address 0x");
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if (address < 16)
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Serial.print("0");
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Serial.print(address, HEX);
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Serial.println(" !");
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nDevices++;
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} else if (error == 4) {
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Serial.print("Unknown error at address 0x");
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if (address < 16)
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Serial.print("0");
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Serial.println(address, HEX);
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}
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}
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if (nDevices == 0)
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Serial.println("No I2C devices found\n");
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else
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Serial.println("done\n");
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delay(5000); // wait 5 seconds for next scan
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} |