Hi!

anybody had implement Modbus ?
I'm having hard time to get mine working.
I'm using esp32ModbusRTU library.

here is my code;

esp32ModbusRTU modbus(&Serial1, -1); 


void modbusTask(void *pvParameters) {
  Serial1.begin(4800, SERIAL_8N1, RX, TX); 
  printf("Serial1 initialized for Modbus\n");
  vTaskDelay(pdMS_TO_TICKS(1000)); 

    // callbacks  Modbus
    modbus.onData([](uint8_t serverAddress, esp32Modbus::FunctionCode fc, uint8_t* data, size_t length) {
        printf("Modbus Response Received - Server ID: 0x%02x, Function Code: 0x%02x, Length: %u\n", serverAddress, fc, length);
        for (size_t i = 0; i < length; ++i) {
            printf("%02x ", data[i]);
        }
        printf("\n");
    });

    modbus.onError([](esp32Modbus::Error error) {
        printf("Modbus Error: 0x%02x\n", static_cast<uint8_t>(error));
    });

   
    modbus.begin();
  vTaskDelay(pdMS_TO_TICKS(1000)); 

   
    while (true) {
        modbus.readHoldingRegisters(0x01, 0x0000, 4); 
        //vTaskDelay(pdMS_TO_TICKS(1000)); 
    }
}

extern "C" void app_main(void)
{
  vTaskDelay(6000 / portTICK_PERIOD_MS);
  printf("Hello world!\n");
 
    xTaskCreate(modbusTask, "modbusTask", 8192, NULL, 5, NULL);

    while (true) {
        std::cout << "In the while\n" << std::endl;
        //vTaskDelay(pdMS_TO_TICKS(1000));
    }

}

...
#include <esp32ModbusRTU.h>
#include "driver/uart.h"

// Declaration Modbus
esp32ModbusRTU modbus(&Serial1, 10); // 10 is arbitary GPIO because don't use RTS pin


void modbusTask(void *pvParameters) {
// Configurer la communication UART pour Modbus
Serial1.begin(4800, SERIAL_8N1, RX, TX); // Initialise Serial1
printf("Serial1 initialized for Modbus\n");
vTaskDelay(pdMS_TO_TICKS(1000)); // stabilisation time

// Configurer les callbacks de Modbus
modbus.onData([](uint8_t serverAddress, esp32Modbus::FunctionCode fc, uint8_t* data, size_t length) {

printf("Modbus Response Received - Server ID: 0x%02x, Function Code: 0x%02x, Length: %u\n", serverAddress, fc, length);

if (length % 2 != 0) {
printf("Invalid data length\n");
return;
}

for (size_t i = 0; i < length; i += 2) {
uint16_t value = (data[i] << 8) | data[i + 1];
if(i < 5)
value = value / 10;
printf("Register %zu: %u \n", i / 2, value);
}

printf("\n");
});

modbus.onError([](esp32Modbus::Error error) {
printf("Modbus Error: 0x%02x\n", static_cast<uint8_t>(error));
});

// start Modbus
modbus.begin();
vTaskDelay(pdMS_TO_TICKS(1000)); // wait 1 sec to stabilise

while (true) {
modbus.readHoldingRegisters(0x01, 0x0000, 5); // slave address: 0x01
vTaskDelay(pdMS_TO_TICKS(1000));
}
}

extern "C" void app_main(void)
{
xTaskCreate(modbusTask, "modbusTask", 8192, NULL, 5, NULL);

while (true) {
std::cout << "In the while\n" << std::endl;
vTaskDelay(pdMS_TO_TICKS(2000));
}

}

Hello,
Is any reason why documentation explains that this board can be powered only with with 12V?.
I checked schematic view(LDO) and XL1509-5 can support 24V(input). Any other modules uses 5V or 3.3V.
Can I safely use 24V DC Power Supply instead of 12V? (I assume, that input logic will change from 12V to 24V). Is it safe or maybe I'm missing something?.
The input/output 24V logic is very popular in Europe .

Howdy!

Thanks for the A6 Board, im using the second one already and i enjoy it.
I encountered a problem, connected PZEM-004T to Serial on A6 (GPIO12, 13)

When i power the board, it doesnt boot. I plug out the PZEM-004T from A6, it boots. I plug pzem back in. It works normaly, and i receive all the needed data.
What is the problem i have on boot?

pastebin code:
https://pastebin.com/Rbujh2R1

code:

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/*
  KinCony Company - https://www.kincony.com
  -----------------------------------------------------
  This program logs temperature data from a DS18B20 sensor
  to an SD card, including the current date and time.
  The date and time can be set via serial commands.
 
  Serial Command to Set Date and Time:
  ------------------------------------
  DYYYY-MM-DDTHH:MM:SS  (Example: D2024-09-01T20:00:00)
  - Sets the date to September 1, 2024, and the time to 20:00:00.
 
  Serial Command to Get Current Date and Time:
  --------------------------------------------
  current time
  - Returns the current date and time in the format:
    Current Date: YYYY-MM-DD
    Current Time: HH:MM:SS
*/

How to use 0-20mA signal to analog input?

Admin did not anservered the qustion?
How to use 0-20mA signal insted off 4-20mA

Hello,

I am using a H32B Pro and Home Assistant to control an irrigation system and would like to add another 32 channels? How should I do this? Should I get another H32B Pro or is there an extension module I could use?

Thank you,

David

Hello!!
Could I ask for instructions on how to make roller blinds for ESPhome ? I need some code to run it.
I can't find it on the Internet and what I found doesn't work. I have KC868-A8-V1.6


TXH

I purchased KC868-A16 from you via Aliexpress ( Order ID: 3034630932938839).
As the menu/specification table says (see the attached image), the device should have:
> 16 digital input LOG1 = +8 to 12VDC
> and 2 analog inputs 4-20mA.

But
> the device does not have digital inputs working with a positive signal, i.e. PNP. So I have to buy logic signal converters :o( .

> and even (now I found out on your site https://www.kincony.com/esp32-board-16-c...dware.html ) that there are no analog current inputs. Is that so?

Do you have inaccurate information when selling? What is the truth?
Regards

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Hallo kincony!
I need a code for aduino IDE with:
 - Ethernet
 - MQTT
 - 16 inputs
 - 16 outputs
 - small web server just for entering (and save it to eprom):
     - static ip
     - server\broker ip
     - server subnet
     - server mask
     - subscribe topic
     - publish topic

new configuration.yaml file for home assistant MQTT. this file fixed linear issue.