Hi, I am Sim7600E kc868_A4S Model to call website URL after Internet activation. 

SIM Yellow Light is blinking. 

SIM call and SMS are working. But, Internet is not working. I have changed SIM Provider APN details


#include <HardwareSerial.h>
// Define SIM7600 UART
#define MODEM_RX 13   // Connect to SIM7600 TX
#define MODEM_TX 15   // Connect to SIM7600 RX
HardwareSerial sim7600(1);  // Use UART1
const char* APN = "du";    // Set your network APN
const char* USER = "";     // Usually blank
const char* PASS = "";     // Usually blank
void setup() {
  Serial.begin(115200);           // USB serial
  sim7600.begin(115200, SERIAL_8N1, MODEM_RX, MODEM_TX); // UART1
  delay(5000);  // Give time to power up
  Serial.println("Initializing SIM7600...");
  // Disable echo for clean output
  sendATCommand("ATE0", "OK", 1000);
  // Basic check
  if (!retryCommand("AT", "OK", 2000, 3)) {
    Serial.println("SIM7600 not responding!");
    while (1);
  }
  // SIM card check
  if (!sendATCommand("AT+CPIN?", "READY", 2000)) {
    Serial.println("SIM Card not ready!");
    while (1);
  }
  // Set LTE-only mode
  sendATCommand("AT+CNMP=38", "OK", 3000);
  sendATCommand("AT+CMNB=1", "OK", 3000);
  // Set APN
  String apnCmd = "AT+CGDCONT=1,\"IP\",\"" + String(APN) + "\"";
  sendATCommand(apnCmd.c_str(), "OK", 3000);
  // Attach to network
  if (!sendATCommand("AT+CGATT=1", "OK", 10000)) {
    Serial.println("Failed to attach to network!");
    while (1);
  }
  // Activate PDP
  if (!sendATCommand("AT+CGACT=1,1", "OK", 10000)) {
    Serial.println("Failed to activate PDP!");
    while (1);
  }
  // Show IP
  printIPAddress();
}
void loop() {
  // Optional: monitor SIM7600 data or implement HTTP
}
// ========== AT COMMAND HELPERS ==========
bool sendATCommand(const char* cmd, const char* expected, uint32_t timeout) {
  sim7600.flush();
  sim7600.println(cmd);
  Serial.print(">> "); Serial.println(cmd);
  uint32_t start = millis();
  String response;
  while (millis() - start < timeout) {
    while (sim7600.available()) {
      char c = sim7600.read();
      Serial.write©;
      response += c;
      if (response.indexOf(expected) != -1) {
        return true;
      }
    }
  }
  Serial.println("\n!! Timeout or Unexpected response:");
  Serial.println(response);
  return false;
}
bool retryCommand(const char* cmd, const char* expected, uint32_t timeout, int retries) {
  for (int i = 0; i < retries; i++) {
    if (sendATCommand(cmd, expected, timeout)) return true;
    delay(1000);
  }
  return false;
}
void printIPAddress() {
  Serial.println("Checking IP with AT+CGPADDR=1...");
  sim7600.println("AT+CGPADDR=1");
  delay(1000);
  String response;
  while (sim7600.available()) {
    char c = sim7600.read();
    Serial.write©;
    response += c;
  }
  int ipStart = response.indexOf(",\"") + 2;
  int ipEnd = response.indexOf("\"", ipStart);
  if (ipStart > 1 && ipEnd > ipStart) {
    String ip = response.substring(ipStart, ipEnd);
    Serial.print("Assigned IP: ");
    Serial.println(ip);
  } else {
    Serial.println("No IP Address Assigned");
  }
}

OutPut  
13:57:40.249 -> >> AT
13:57:42.215 -> !! Timeout or Unexpected response:
13:57:49.212 -> SIM7600 not responding!


Note : SIM calling is working 
Note 2: SIM SMS are working.
Only Internet is not activated. I have to call website URL after Internet connected. 


   

Hello,

Who can help me, I have a KS868-A16 I would like 
to connect an I2s display 20x4) and show DS16B20 sensors on the 
display but I can't do it.

i use esphome, I have some DS16B20 sensors and they already work well with KS868-A16.

Greetings Mark

Hi,

I am using Serial.begin() and Serial.println() but I see nothing in my Serial Monitor (Platformio). What could the problem be?

I am using 115200 as monitoring speed (configured in platformio.ini) and my Serial monitor is configured with the same rate.

I am using the demo code below:

Tried to copy some RF-remotes i had laying around.
I go the RF-page and hit the "learn" button. all i got is a timeout.

Is there anything that needs to be done first to receive the RF-signals?
I tried this running v3.9.1.

Hi everyone,
I'm using the Kincony KC868-A6 V1.4 board and planning to connect several DS18B20 temperature sensors. I know these sensors can work with 3.3V, but they tend to be more stable with a 5V power supply—especially when using longer cables.
Does this board provide a dedicated 5V output pin that I can use to power the DS18B20 sensors? If so, where exactly can I find it on the board?
Any help or insights would be greatly appreciated!
Thanks in advance!

Can somebody test my code my wifi is dropping and cant connect to it after the update esphome


ESPHome Device Builder 
Current version: 2025.4.1

Home Assistant
Core 2025.4.4
Supervisor 2025.04.1
Operating System 15.2
Frontend 20250411.0

Network 
UniFi OS 4.2.9
Network 9.0.114

Attached Files

  koi-rk-kincony-kc868-a128_logs.txt (Size: 12.57 KB / Downloads: 345)
  default-code.txt (Size: 618 bytes / Downloads: 333)
  full code.txt (Size: 40.64 KB / Downloads: 316)

Hi, NooB Here.

Trying to program the ESP32 in PlatformIO:

1. Which ESP32 S3 chip should I configure when creating the project in PlatformIO?

2. How do I make it connect to upload? Do I need to hold a button before uploading? I tried holding the DL button but it didn't connect. Same for the RST button.

Thanks

Can I use 24V DC instead of 230V AC on relays?

I would like to use them to activate my 24VDC activated contactor (and then contactor would let 230V AC to pass through).

KC868-A6 PCB layout CAD file

Attached Files

  KC868_A6_V104SP.zip (Size: 255.69 KB / Downloads: 706)

KC868-A4 PCB layout CAD file

Attached Files

  KC868-A4-V1.2.6-20250410.zip (Size: 436.78 KB / Downloads: 576)