Open coderkan opened 3 years ago
Hi, thanks for the question/
I don't know, if you make it work comment here. Matve this repo is better starting point: https://github.com/yaacov/ArduinoModbusSlaveTCP
Hi @yaacov ,
I tried to use in ESP32 kit but I have no success at this point. I focused on Serial RTU. I will try again later. If It would work, I will comment you.
Regards. Erkan
Ler me know if someone have sucsess with this. im also srugling to get the RTU slave to Work on my ESP32
Hi @Bach-Danielsson
I have not success to run this code in ESP32.
I have found a library on github. But I have come across problems to use this library. Please let me know if you find a good solution for rtu slave for esp32.
Regards. Erkan
Hi,
I've tested the RTU-RS485 Client and with a few tweaks the code works like a charm with the ESP32dev Kit. I make a Pull Request after complete testing. (need a few days...)
Martin
esp32能用,但是0x03每次最多只能读50个,0x0f每次最多只能写50个
This is limited by Modbus protocol.
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esp32能用,但是0x03每次最多只能读50个,0x0f每次最多只能写50个
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that is not completely right. The Modbus protocol has a frame width of 256 bytes. (253 bytes for user data). We are currently only using 128 bytes here, according to the specifications of the ESP32 core. You can try changing the RX/TX buffer size.
In ModbusSlave.h change:
`#if defined (ESP32) || defined (ESP8266)
and in your Setup Routine and BEVORE the Serial init:
SERIAL_PORT.setRxBufferSize(SERIAL_BUFFER_SIZE);
SERIAL_PORT.setTxBufferSize(SERIAL_BUFFER_SIZE);
// Set the serial port and slave to the given baudrate.
SERIAL_PORT.begin(SERIAL_BAUDRATE);
slave.begin(SERIAL_BAUDRATE);
I don't know if that works with the Arduino 1.6 ESP Core, but it should work with the 2.02.
good luck...
我改到1024还是只能写 55 个
No Problem to read 125 Words of an 03 Register:
so your Master is not support more Register?
No Problem to read 125 Words of an 03 Register:
so your Master is not support more Register?
Can you tell me what software this is, thank you
thanks
I'm successfully using V2.1.1 on ESP32 and it worked more or less out of the box ... Only minor adjustments required to get it running. See issue #98.
Hi there,
I wonder that can I use this library on ESP32 module? Have you ever tried that?
Regards. Erkan