新手求助，8266 modbus通信问题
有那位大哥做过这个东西，我用arduinoIDE + esp8266 + im1281b,目的是想读取1281b里面的寄存器数据，但是一直读不到，求指点一下，谢谢！void setup() {
// initialize digital pin LED_BUILTIN as an output.
Serial.begin(9600);
pinMode(LED_BUILTIN, OUTPUT);
}
unsigned charTx_Buffer;
unsigned charRx_Buffer;
unsigned charread_enable, receive_finished, reveive_number;
unsigned longVoltage_data, Current_data, Power_data, Energy_data, Pf_data, CO2_data;
// the loop function runs over and over again forever
void loop() {
union crcdata {
unsigned int word16;
unsigned charbyte;
}crcnow;
Tx_Buffer = 0x01; //模块的 ID 号，默认 ID 为 0x01
Tx_Buffer = 0x03;
Tx_Buffer = 0x00;
Tx_Buffer = 0x48;
Tx_Buffer = 0x00;
Tx_Buffer = 0x08;
crcnow.word16 = chkcrc(Tx_Buffer, 6);
Tx_Buffer = crcnow.byte; //CRC 效验低字节在前
Tx_Buffer = crcnow.byte;
Serial.write(Tx_Buffer, 8);
delay(1000);
while (Serial.available() > 0) {
//Serial.readBytes(Rx_Buffer, 24);
//Serial.flush();
int x = Serial.read();
Serial.print(x,HEX);
}
}
unsigned int calccrc(unsigned char crcbuf, unsigned int crc) {
unsigned char i;
unsigned char chk;
crc = crc ^ crcbuf;
for (i = 0; i < 8; i++){
chk = ( unsigned char)(crc & 1);
crc = crc >> 1;
crc = crc & 0x7fff;
if (chk == 1) crc = crc ^ 0xa001;
crc = crc & 0xffff;
} return crc;
}
unsigned int chkcrc(unsigned char *buf, unsigned char len) {
unsigned char hi, lo;
unsigned int i;
unsigned int crc;
crc = 0xFFFF;
for (i = 0; i < len; i++){
crc = calccrc(*buf, crc);
buf++;
}
hi = ( unsigned char)(crc % 256);
lo = ( unsigned char)(crc / 256);
crc = (((unsigned int)(hi)) << 8) | lo;
return crc;
}
你最后搞通了么？我也在弄modbus一直编译失败，用的 arduinomodbus.h 库
C:\Users\zhaom\Documents\Arduino\libraries\ArduinoRS485\src\RS485.cpp: In member function 'virtual void RS485Class::begin(long unsigned int, uint16_t)':
C:\Users\zhaom\Documents\Arduino\libraries\ArduinoRS485\src\RS485.cpp:53:34: error: invalid conversion from 'uint16_t {aka short unsigned int}' to 'SerialConfig' [-fpermissive]
_serial->begin(baudrate, config);
^
In file included from C:\Users\zhaom\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.3\cores\esp8266/Arduino.h:244:0,
from C:\Users\zhaom\Documents\Arduino\libraries\ArduinoRS485\src\RS485.h:23,
from C:\Users\zhaom\Documents\Arduino\libraries\ArduinoRS485\src\RS485.cpp:20:
C:\Users\zhaom\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.3\cores\esp8266/HardwareSerial.h:78:10: error: initializing argument 2 of 'void HardwareSerial::begin(long unsigned int, SerialConfig)' [-fpermissive]
void begin(unsigned long baud, SerialConfig config)
^
C:\Users\zhaom\Documents\Arduino\libraries\ArduinoRS485\src\RS485.cpp: In member function 'void RS485Class::sendBreak(unsigned int)':
C:\Users\zhaom\Documents\Arduino\libraries\ArduinoRS485\src\RS485.cpp:149:36: error: invalid conversion from 'uint16_t {aka short unsigned int}' to 'SerialConfig' [-fpermissive]
_serial->begin(_baudrate, _config);
^
In file included from C:\Users\zhaom\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.3\cores\esp8266/Arduino.h:244:0,
from C:\Users\zhaom\Documents\Arduino\libraries\ArduinoRS485\src\RS485.h:23,
from C:\Users\zhaom\Documents\Arduino\libraries\ArduinoRS485\src\RS485.cpp:20:
C:\Users\zhaom\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.3\cores\esp8266/HardwareSerial.h:78:10: error: initializing argument 2 of 'void HardwareSerial::begin(long unsigned int, SerialConfig)' [-fpermissive]
void begin(unsigned long baud, SerialConfig config)
^
C:\Users\zhaom\Documents\Arduino\libraries\ArduinoRS485\src\RS485.cpp: In member function 'void RS485Class::sendBreakMicroseconds(unsigned int)':
C:\Users\zhaom\Documents\Arduino\libraries\ArduinoRS485\src\RS485.cpp:159:36: error: invalid conversion from 'uint16_t {aka short unsigned int}' to 'SerialConfig' [-fpermissive]
_serial->begin(_baudrate, _config);
^
In file included from C:\Users\zhaom\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.3\cores\esp8266/Arduino.h:244:0,
from C:\Users\zhaom\Documents\Arduino\libraries\ArduinoRS485\src\RS485.h:23,
from C:\Users\zhaom\Documents\Arduino\libraries\ArduinoRS485\src\RS485.cpp:20:
C:\Users\zhaom\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.3\cores\esp8266/HardwareSerial.h:78:10: error: initializing argument 2 of 'void HardwareSerial::begin(long unsigned int, SerialConfig)' [-fpermissive]
void begin(unsigned long baud, SerialConfig config)
^
In file included from C:\Users\zhaom\Documents\Arduino\libraries\ArduinoRS485\src\RS485.cpp:20:0:
C:\Users\zhaom\Documents\Arduino\libraries\ArduinoRS485\src\RS485.cpp: At global scope:
C:\Users\zhaom\Documents\Arduino\libraries\ArduinoRS485\src\RS485.h:35:30: error: 'A6' was not declared in this scope
#define RS845_DEFAULT_DE_PIN A6
^
C:\Users\zhaom\Documents\Arduino\libraries\ArduinoRS485\src\RS485.cpp:169:62: note: in expansion of macro 'RS845_DEFAULT_DE_PIN'
RS485Class RS485(SERIAL_PORT_HARDWARE, RS485_DEFAULT_TX_PIN, RS845_DEFAULT_DE_PIN, RS845_DEFAULT_RE_PIN);
^
C:\Users\zhaom\Documents\Arduino\libraries\ArduinoRS485\src\RS485.h:36:30: error: 'A5' was not declared in this scope
#define RS845_DEFAULT_RE_PIN A5
^
C:\Users\zhaom\Documents\Arduino\libraries\ArduinoRS485\src\RS485.cpp:169:84: note: in expansion of macro 'RS845_DEFAULT_RE_PIN'
RS485Class RS485(SERIAL_PORT_HARDWARE, RS485_DEFAULT_TX_PIN, RS845_DEFAULT_DE_PIN, RS845_DEFAULT_RE_PIN);
^
exit status 1
为开发板 Generic ESP8266 Module 编译时出错。 搞定了，两个模块串口干扰问题 确实，你这代码试了没问题的 求个教程 能带0103功能码示例更好 cxoo 发表于 2020-4-23 12:41
你最后搞通了么？我也在弄modbus一直编译失败，用的 arduinomodbus.h 库
C:%users\zhaom\Documents\Arduin ...
遇到同样问题，同问
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