{"id":43930,"date":"2026-06-26T08:46:30","date_gmt":"2026-06-26T00:46:30","guid":{"rendered":"https:\/\/www.modbus.cn\/43930.html"},"modified":"2026-06-26T08:46:30","modified_gmt":"2026-06-26T00:46:30","slug":"simplemodbus-arduino-ku-shi-yong-jiao-cheng-rang-arduino-tong-guo-modbus-rtu-tong-xin","status":"publish","type":"post","link":"https:\/\/www.modbus.cn\/en\/43930.html","title":{"rendered":"SimpleModbus Arduino\u5e93\u4f7f\u7528\u6559\u7a0b\uff1a\u8ba9Arduino\u901a\u8fc7Modbus RTU\u901a\u4fe1"},"content":{"rendered":"\n

SimpleModbus \u7b80\u4ecb<\/h2>\n\n\n\n

SimpleModbus \u662f\u4e00\u5957\u4e3a Arduino \u5e73\u53f0\u5f00\u53d1\u7684 Modbus RTU \u534f\u8bae\u5e93\uff0c\u6258\u7ba1\u5728 Google Code Archive<\/a>\uff08\u9879\u76ee\u5df2\u88ab\u5f52\u6863\uff09\u3002\u5b83\u7531 Juan Bester \u5f00\u53d1\uff0c\u5305\u542b SimpleModbusMaster\uff08\u4e3b\u7ad9\u5e93\uff09\u548c SimpleModbusSlave\uff08\u4ece\u7ad9\u5e93\uff09\u4e24\u4e2a\u72ec\u7acb\u7684 Arduino \u5e93\u3002\u867d\u7136\u9879\u76ee\u540d\u79f0\u91cc\u6709”Simple”\uff0c\u4f46\u5b83\u63d0\u4f9b\u7684\u529f\u80fd\u8986\u76d6\u4e86 Modbus RTU \u901a\u4fe1\u4e2d\u6700\u5e38\u7528\u7684\u529f\u80fd\u7801\uff0c\u975e\u5e38\u9002\u5408 Arduino \u521d\u5b66\u8005\u548c\u5feb\u901f\u539f\u578b\u5f00\u53d1\u3002<\/p>\n\n\n\n

\u26a0\ufe0f \u6ce8\u610f<\/strong>\uff1aSimpleModbus \u9879\u76ee\u5df2\u4e0d\u518d\u6d3b\u8dc3\u66f4\u65b0\u3002\u5bf9\u4e8e\u65b0\u9879\u76ee\uff0c\u63a8\u8350\u4f7f\u7528\u66f4\u73b0\u4ee3\u5316\u7684 Modbus RTU for Arduino<\/strong> \u5e93\uff08\u5e93\u540d\u4e3a “Modbus”\uff09\u6216 esp-modbus<\/strong>\uff08ESP32 \u5e73\u53f0\uff09\u3002\u4f46 SimpleModbus \u7684\u4ee3\u7801\u7b80\u6d01\u6613\u61c2\uff0c\u4f5c\u4e3a\u5b66\u4e60 Modbus \u534f\u8bae\u5b9e\u73b0\u7684\u5165\u95e8\u8d44\u6599\u4ecd\u7136\u5f88\u6709\u4ef7\u503c\u3002<\/p>\n\n\n\n

SimpleModbus \u652f\u6301\u7684\u529f\u80fd<\/h2>\n\n\n\n
    \n
  • SimpleModbusMaster<\/strong>\uff1a\u652f\u6301 FC01\uff08\u8bfb\u7ebf\u5708\uff09\u3001FC02\uff08\u8bfb\u79bb\u6563\u8f93\u5165\uff09\u3001FC03\uff08\u8bfb\u4fdd\u6301\u5bc4\u5b58\u5668\uff09\u3001FC04\uff08\u8bfb\u8f93\u5165\u5bc4\u5b58\u5668\uff09\u3001FC15\uff08\u5199\u591a\u7ebf\u5708\uff09\u3001FC16\uff08\u5199\u591a\u5bc4\u5b58\u5668\uff09<\/li>\n
  • SimpleModbusSlave<\/strong>\uff1a\u652f\u6301 FC03\uff08\u8bfb\u4fdd\u6301\u5bc4\u5b58\u5668\uff09\u548c FC16\uff08\u5199\u591a\u5bc4\u5b58\u5668\uff09<\/li>\n
  • \u786c\u4ef6\u8981\u6c42<\/strong>\uff1aArduino + RS-485 \u8f6c\u6362\u6a21\u5757\uff08\u5982 MAX485\uff09<\/li>\n<\/ul>\n\n\n\n

    \u786c\u4ef6\u8fde\u63a5<\/h2>\n\n\n\n

    Arduino \u901a\u8fc7 MAX485 \u6a21\u5757\u8fde\u63a5 RS-485 \u603b\u7ebf\u3002\u5178\u578b\u63a5\u7ebf\u65b9\u5f0f\uff1a<\/p>\n\n\n\n

    \n\n
    MAX485 \u5f15\u811a<\/th>Arduino Uno<\/th>\u8bf4\u660e<\/th><\/tr><\/thead>\n
    VCC<\/td>5V<\/td>\u7535\u6e90<\/td><\/tr>\n
    GND<\/td>GND<\/td>\u5730<\/td><\/tr>\n
    RO<\/td>RX (D0)<\/td>\u63a5\u6536\u6570\u636e \u2192 Arduino \u4e32\u53e3 RX<\/td><\/tr>\n
    DI<\/td>TX (D1)<\/td>\u53d1\u9001\u6570\u636e \u2190 Arduino \u4e32\u53e3 TX<\/td><\/tr>\n
    RE<\/td>D2<\/td>\u63a5\u6536\u4f7f\u80fd\uff08\u4f4e\u6709\u6548\uff09<\/td><\/tr>\n
    DE<\/td>D2<\/td>\u53d1\u9001\u4f7f\u80fd\uff08\u9ad8\u6709\u6548\uff09\uff0c\u4e0e RE \u5e76\u8054\u5230\u540c\u4e00 IO<\/td><\/tr>\n
    A<\/td>A (\u603b\u7ebf+)<\/td>RS-485 A \u7ebf\uff08\u5dee\u5206+\uff09<\/td><\/tr>\n
    B<\/td>B (\u603b\u7ebf-)<\/td>RS-485 B \u7ebf\uff08\u5dee\u5206-\uff09<\/td><\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n\n\n

    \u26a0\ufe0f \u5728 RS-485 \u603b\u7ebf\u7684\u4e24\u7aef\u5fc5\u987b\u52a0 120\u03a9 \u7ec8\u7aef\u7535\u963b\uff08A-B \u4e4b\u95f4\uff09\uff0c\u5426\u5219\u957f\u8ddd\u79bb\u901a\u4fe1\u4f1a\u51fa\u73b0\u4fe1\u53f7\u53cd\u5c04\u5bfc\u81f4\u6570\u636e\u9519\u8bef\u3002<\/p>\n\n\n\n

    SimpleModbusSlave \u793a\u4f8b\uff1aArduino \u4f5c\u4e3a Modbus RTU \u4ece\u7ad9<\/h2>\n\n\n\n
    #include <SimpleModbusSlave.h>\n\n\/\/ \u5b9a\u4e49\u4fdd\u6301\u5bc4\u5b58\u5668\u6570\u7ec4\uff0810\u4e2a\u5bc4\u5b58\u5668\uff09\nenum {\n    TEMP_REG = 0,      \/\/ \u6e29\u5ea6\uff08x10\uff09\n    HUMIDITY_REG,       \/\/ \u6e7f\u5ea6\uff08x10\uff09\n    COIL_STATUS,        \/\/ \u7ebf\u5708\u72b6\u6001\n    SETPOINT,           \/\/ \u8bbe\u5b9a\u503c\n    \/\/ ... \u66f4\u591a\u5bc4\u5b58\u5668\n    TOTAL_REGS = 10\n};\n\nunsigned int holdingRegs[TOTAL_REGS];\n\nvoid setup() {\n    \/\/ \u8bbe\u7f6e RS-485 \u65b9\u5411\u63a7\u5236\u5f15\u811a\n    pinMode(2, OUTPUT);\n    \n    \/\/ SimpleModbusSlave \u53c2\u6570\uff1a\n    \/\/ 1. \u5bc4\u5b58\u5668\u6570\u7ec4\u5730\u5740\n    \/\/ 2. \u5bc4\u5b58\u5668\u6570\u91cf\n    \/\/ 3. \u53d1\u9001\u4f7f\u80fd\u5f15\u811a\n    \/\/ 4. \u53d1\u9001\u4f7f\u80fd\u6709\u6548\u7535\u5e73\n    \/\/ 5. \u4ece\u7ad9\u5730\u5740\n    \/\/ 6. \u6ce2\u7279\u7387\n    \/\/ 7. \u6821\u9a8c\uff080=\u65e0\u6821\u9a8c\uff09\n    modbus_configure(holdingRegs, TOTAL_REGS,\n                     2,                  \/\/ TXEN \u5f15\u811a\n                     HIGH,               \/\/ TXEN \u9ad8\u7535\u5e73\u65f6\u53d1\u9001\n                     1,                  \/\/ \u4ece\u7ad9\u5730\u5740\n                     9600,               \/\/ \u6ce2\u7279\u7387\n                     0);                 \/\/ \u6821\u9a8c\n}\n\nvoid loop() {\n    \/\/ \u66f4\u65b0\u4f20\u611f\u5668\u6570\u636e\uff08\u6a21\u62df\uff09\n    holdingRegs[TEMP_REG] = analogRead(A0) \/ 2; \/\/ \u6e29\u5ea6\uff08\u6a21\u62df\uff09\n    holdingRegs[HUMIDITY_REG] = analogRead(A1) \/ 3;\n    holdingRegs[COIL_STATUS] = digitalRead(3);\n    \n    \/\/ \u5904\u7406 Modbus \u8bf7\u6c42\n    modbus_update();\n}<\/code><\/pre>\n\n\n\n
    SimpleModbusMaster \u793a\u4f8b\uff1a\u8bfb\u53d6\u4ece\u7ad9\u6570\u636e<\/h2>\n\n\n\n
    #include <SimpleModbusMaster.h>\n\n#define TOTAL_NO_OF_REGISTERS 2\nunsigned int holdingRegs[TOTAL_NO_OF_REGISTERS];\n\nvoid setup() {\n    Serial.begin(9600);\n    \n    \/\/ SimpleModbusMaster \u53c2\u6570\uff1a\n    \/\/ 1. \u672c\u5730\u5bc4\u5b58\u5668\u6570\u7ec4\n    \/\/ 2. \u8bfb\u53d6\/\u5199\u5165\u7684\u5bc4\u5b58\u5668\u6570\u91cf\n    \/\/ 3. \u53d1\u9001\u4f7f\u80fd\u5f15\u811a\n    \/\/ 4. \u53d1\u9001\u4f7f\u80fd\u6709\u6548\u7535\u5e73\n    modbus_configure(holdingRegs, TOTAL_NO_OF_REGISTERS,\n                     2,      \/\/ TXEN \u5f15\u811a\n                     HIGH);  \/\/ TXEN \u9ad8\u7535\u5e73\u65f6\u53d1\u9001\n}\n\nvoid loop() {\n    \/\/ \u4ece\u7ad9\u5730\u5740 1\uff0c\u8d77\u59cb\u5730\u5740 0\uff0c\u8bfb\u53d6 2 \u4e2a\u4fdd\u6301\u5bc4\u5b58\u5668\n    unsigned char result = modbus_read_holding_registers(1, 0, 2);\n    \n    if (result == 0) {\n        Serial.print(\"\u6e29\u5ea6: \");\n        Serial.print(holdingRegs[0] \/ 10.0);\n        Serial.print(\"\u00b0C, \u6e7f\u5ea6: \");\n        Serial.print(holdingRegs[1] \/ 10.0);\n        Serial.println(\"%\");\n    } else {\n        Serial.print(\"Modbus \u8bfb\u53d6\u5931\u8d25\uff0c\u9519\u8bef\u7801: \");\n        Serial.println(result);\n    }\n    \n    delay(1000);\n}<\/code><\/pre>\n\n\n\n
    SimpleModbus vs \u73b0\u4ee3\u66ff\u4ee3\u65b9\u6848<\/h2>\n\n\n\n
    SimpleModbus \u9879\u76ee\u5df2\u7ecf\u5728\u6570\u5e74\u524d\u505c\u6b62\u66f4\u65b0\uff0c\u73b0\u4ee3 Arduino \u9879\u76ee\u63a8\u8350\u4ee5\u4e0b\u66ff\u4ee3\u65b9\u6848\uff1a<\/p>\n\n\n\n
    \n\n
    \u5e93\u540d<\/th>\u5e73\u53f0<\/th>\u7279\u70b9<\/th><\/tr><\/thead>\n
    ArduinoModbus<\/strong><\/td>Arduino\uff08\u5b98\u65b9\uff09<\/td>Arduino \u5b98\u65b9\u7ef4\u62a4\uff0c\u652f\u6301 RTU \u548c TCP\uff0cArduino IDE \u5e93\u7ba1\u7406\u5668\u4e00\u952e\u5b89\u88c5<\/td><\/tr>\n
    Modbus-Master-Slave-for-Arduino<\/strong><\/td>Arduino<\/td>\u540c\u65f6\u652f\u6301\u4e3b\u7ad9\u548c\u4ece\u7ad9\uff0c\u529f\u80fd\u7801\u8986\u76d6\u5168\uff0cGitHub \u6d3b\u8dc3\u66f4\u65b0<\/td><\/tr>\n
    esp-modbus<\/strong><\/td>ESP32 \/ ESP8266<\/td>Espressif \u5b98\u65b9\u5e93\uff0c\u652f\u6301 Modbus RTU\/TCP\/ASCII\uff0c\u6027\u80fd\u4f18\u5f02<\/td><\/tr>\n
    SimpleModbus<\/strong><\/td>Arduino<\/td>\u7b80\u5355\u6613\u61c2\uff0c\u9002\u5408\u5b66\u4e60\uff0c\u4f46\u5df2\u505c\u66f4<\/td><\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n\n\n
    ESP32 \u4e0a\u5b9e\u73b0 Modbus RTU \u901a\u4fe1\uff08\u73b0\u4ee3\u65b9\u6848\uff09<\/h2>\n\n\n\n
    \u5982\u679c\u4f60\u4f7f\u7528 ESP32 \u5e73\u53f0\uff0c\u63a8\u8350 Espressif \u5b98\u65b9\u7684 esp-modbus \u5e93\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u6700\u5c0f\u793a\u4f8b\uff1a<\/p>\n\n\n\n
    \/\/ ESP32 \u4f7f\u7528 HardwareSerial + MAX485\n#include <Arduino.h>\n\n\/\/ \u5b9a\u4e49 RS-485 \u63a7\u5236\u5f15\u811a\n#define RXD2 16  \/\/ ESP32 RX2\n#define TXD2 17  \/\/ ESP32 TX2\n#define DE_RE 4  \/\/ RS-485 \u65b9\u5411\u63a7\u5236\n\nHardwareSerial modbusSerial(2);\n\nvoid setup() {\n    Serial.begin(115200);\n    modbusSerial.begin(9600, SERIAL_8N1, RXD2, TXD2);\n    pinMode(DE_RE, OUTPUT);\n    digitalWrite(DE_RE, LOW); \/\/ \u9ed8\u8ba4\u63a5\u6536\u6a21\u5f0f\n}\n\nvoid loop() {\n    \/\/ \u53d1\u9001 Modbus RTU \u8bf7\u6c42\uff08\u624b\u52a8\u6784\u9020\u5e27\uff09\n    uint8_t request[] = {\n        0x01,        \/\/ \u4ece\u7ad9\u5730\u5740\n        0x03,        \/\/ \u529f\u80fd\u7801\uff08\u8bfb\u4fdd\u6301\u5bc4\u5b58\u5668\uff09\n        0x00, 0x00,  \/\/ \u8d77\u59cb\u5730\u5740\n        0x00, 0x02   \/\/ \u8bfb\u53d6 2 \u4e2a\u5bc4\u5b58\u5668\n    };\n    uint16_t crc = calculateCRC(request, 6);\n    request[6] = crc & 0xFF;\n    request[7] = crc >> 8;\n    \n    \/\/ \u5207\u6362\u5230\u53d1\u9001\u6a21\u5f0f\n    digitalWrite(DE_RE, HIGH);\n    delayMicroseconds(100);\n    modbusSerial.write(request, 8);\n    modbusSerial.flush();\n    \n    \/\/ \u5207\u6362\u56de\u63a5\u6536\u6a21\u5f0f\n    digitalWrite(DE_RE, LOW);\n    \n    \/\/ \u7b49\u5f85\u54cd\u5e94\n    delay(500);\n    while (modbusSerial.available()) {\n        Serial.printf(\"%02X \", modbusSerial.read());\n    }\n    Serial.println();\n    delay(2000);\n}<\/code><\/pre>\n\n\n\n
    Arduino \u5b98\u65b9 ArduinoModbus \u5e93<\/h2>\n\n\n\n
    \u5728 Arduino IDE \u4e2d\u6253\u5f00\u5e93\u7ba1\u7406\u5668\uff08Sketch \u2192 Include Library \u2192 Manage Libraries\uff09\uff0c\u641c\u7d22 “ArduinoModbus”<\/strong>\uff0c\u5b89\u88c5\u5373\u53ef\u3002ArduinoModbus \u652f\u6301 Modbus RTU\uff08RS-485\uff09\u548c Modbus TCP\uff08WiFi\/\u4ee5\u592a\u7f51\uff09\uff0c\u4e3b\u7ad9\u548c\u4ece\u7ad9\u6a21\u5f0f\u5747\u53ef\u3002<\/p>\n\n\n\n
    #include <ArduinoRS485.h>\n#include <ArduinoModbus.h>\n\nvoid setup() {\n    Serial.begin(9600);\n    \n    \/\/ \u521d\u59cb\u5316 RS-485\n    RS485.begin(9600);\n    \n    \/\/ \u542f\u52a8 Modbus RTU \u4ece\u7ad9\uff08\u5730\u5740 1\uff09\n    ModbusRTUServer.begin(1, 9600);\n    \n    \/\/ \u914d\u7f6e\u4fdd\u6301\u5bc4\u5b58\u5668\n    ModbusRTUServer.configureHoldingRegisters(0, 10);\n}\n\nvoid loop() {\n    \/\/ \u8f6e\u8be2 Modbus \u8bf7\u6c42\n    ModbusRTUServer.poll();\n    \n    \/\/ \u66f4\u65b0\u5bc4\u5b58\u5668\u503c\n    int sensorValue = analogRead(A0);\n    ModbusRTUServer.holdingRegisterWrite(0, sensorValue);\n}<\/code><\/pre>\n\n\n\n
    \u5e38\u89c1\u95ee\u9898\u6392\u67e5<\/h2>\n\n\n\n
    \u901a\u4fe1\u5b8c\u5168\u6ca1\u6709\u54cd\u5e94<\/h3>\n\n\n\n
      \n
    • \u68c0\u67e5 MAX485 DE\/RE \u5f15\u811a\u7684\u65b9\u5411\u5207\u6362\u903b\u8f91\u662f\u5426\u6b63\u786e\uff08\u53d1\u9001\u65f6 HIGH\u3001\u63a5\u6536\u65f6 LOW\uff09<\/li>\n
    • \u786e\u8ba4\u6ce2\u7279\u7387\u548c\u4ece\u7ad9\u5730\u5740\u4e0e\u4e3b\u7ad9\u914d\u7f6e\u4e00\u81f4<\/li>\n
    • \u7528 USB \u8f6c RS-485 \u6a21\u5757 + \u4e32\u53e3\u52a9\u624b\u76d1\u63a7\u603b\u7ebf\u6570\u636e\uff0c\u786e\u8ba4\u4fe1\u53f7\u662f\u5426\u5b58\u5728<\/li>\n
    • \u68c0\u67e5 A\/B \u7ebf\u662f\u5426\u63a5\u53cd\uff08\u7528\u4e07\u7528\u8868\u6d4b\u5dee\u5206\u7535\u538b\uff1aA \u5bf9 B \u5e94\u4e3a\u6b63\u7535\u538b\u65f6\u603b\u7ebf\u7a7a\u95f2\uff09<\/li>\n<\/ul>\n\n\n\n
      \u5076\u5c14\u4e22\u6570\u636e\u6216 CRC \u9519\u8bef<\/h3>\n\n\n\n
        \n
      • \u68c0\u67e5 RS-485 \u603b\u7ebf\u4e24\u7aef\u662f\u5426\u52a0\u4e86 120\u03a9 \u7ec8\u7aef\u7535\u963b<\/li>\n
      • \u964d\u4f4e\u6ce2\u7279\u7387\u5c1d\u8bd5\uff084800 \u6216 2400\uff09\uff0c\u6392\u9664\u4fe1\u53f7\u5b8c\u6574\u6027\u56e0\u7d20<\/li>\n
      • \u7f29\u77ed\u603b\u7ebf\u957f\u5ea6\u6216\u52a0\u4e2d\u7ee7\u5668<\/li>\n
      • \u786e\u8ba4\u53d1\u9001\u5b8c\u6210\u5230\u63a5\u6536\u5207\u6362\u4e4b\u95f4\u7559\u6709\u8db3\u591f\u7684\u5ef6\u65f6\uff08\u81f3\u5c11 1 \u4e2a\u5b57\u7b26\u65f6\u95f4\uff09<\/li>\n<\/ul>\n\n\n\n
        \u603b\u7ed3<\/h2>\n\n\n\n
        SimpleModbus \u4f5c\u4e3a\u65e9\u671f Arduino Modbus RTU \u5e93\uff0c\u5176\u4ee3\u7801\u7b80\u6d01\u3001\u529f\u80fd\u660e\u786e\uff0c\u9002\u5408\u521d\u5b66\u8005\u7406\u89e3 Modbus \u534f\u8bae\u7684\u5b9e\u73b0\u539f\u7406\u3002\u4f46\u5728\u5b9e\u9645\u9879\u76ee\u4e2d\uff0c\u63a8\u8350\u4f7f\u7528\u7ef4\u62a4\u66f4\u6d3b\u8dc3\u3001\u529f\u80fd\u66f4\u5b8c\u5584\u7684\u66ff\u4ee3\u65b9\u6848\uff1aArduino \u5b98\u65b9\u5e93 ArduinoModbus\uff08\u901a\u7528 Arduino \u5e73\u53f0\uff09\u6216 esp-modbus\uff08ESP32\/ESP8266 \u5e73\u53f0\uff09\u3002\u65e0\u8bba\u9009\u62e9\u54ea\u4e2a\u5e93\uff0c\u6838\u5fc3\u7684 Modbus RTU \u901a\u4fe1\u539f\u7406\u2014\u2014\u4ece\u7ad9\u5730\u5740\u3001\u529f\u80fd\u7801\u3001\u5bc4\u5b58\u5668\u6620\u5c04\u3001CRC \u6821\u9a8c\u2014\u2014\u90fd\u662f\u4e00\u81f4\u7684\u3002<\/p>\n<\/span>","protected":false},"excerpt":{"rendered":"
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