I would really appreciate your help. I am new to M5Stack devices and tried to program an IR/WLAN gateway. When I programmed with my first device, I didn't realize that the status LED is not working any more. It worked at the beginning - I am sure. Then, with the same program I tried it on teh second device where the LED turned on with the first plug in of USB cable.
Now, also the second device LED is probably brokern.

I tried the simple demos blink.ino etc but could not get the LEDs running.

My program looks as follows:

#include <M5Atom.h>
#include <WiFi.h>
#include <WiFiMulti.h>

// External library: IRRemoteESP8266, https://github.com/crankyoldgit/IRremoteESP8266
#include <IRrecv.h>
#include <IRremoteESP8266.h>

// HW: Pin assignments
const byte PIN_BUTTON = 39; // M5Stack Atom Lite: internal button
const byte PIN_LEDATOM = 27; // M5Stack Atom Lite: internel Neopixel LED
const byte PIN_LEDSTRIP = 26; // M5SAtack Atom Lite: Grove connector GPIO pin (yellow cable) -> Neopixel LED strip
const byte PIN_IRRECV = 32; // M5SAtack Atom Lite: Grove connector GPIO pin (white cable) -> IR Receiver

// Type declarations
enum State {OFF = 0, ON = 1, ECO = 2}; // Main system states
typedef enum State t_State;

// Switch to receive debug messages via serial monitor
const bool DEBUG_ON = false;

// Status LED: color definitions
const uint8_t COLOR_OFF[3] = {255, 0, 0}; // System state: OFF
const uint8_t COLOR_ON[3] = {0, 255, 0}; // System state: ON
const uint8_t COLOR_ECO[3] = {0, 255, 0}; // System state: ECO

// Status LED and LED strip: Brightness constants
const uint8_t BRIGHTNESS_OFF = 8; // System state: OFF
const uint8_t BRIGHTNESS_ON = 20; // System state: ON
const uint8_t BRIGHTNESS_ECO = 10; // System state: ECO

const uint8_t BRIGHTNESS_MIN = 2; // Lowest brightness
const uint8_t BRIGHTNESS_MAX = 50; // Highest brightness --> maximum current
const uint8_t BRIGHTNESS_STEP = 2; // Increment for brightness adjustement via IR remote

// Time constant, i.e. time after which light effects are updated
const int TIME_CYCLE = 5; // ms

// IR Commands (values depend on the remote control used)
const uint64_t IR_CHminus = 0xFFA25D;
const uint64_t IR_CH = 0xFF629D;
const uint64_t IR_CHplus = 0xFFE21D;

const uint64_t IR_PREV = 0xFF22DD;
const uint64_t IR_NEXT = 0xFF02FD;
const uint64_t IR_PLAY = 0xFFC23D;

const uint64_t IR_MINUS = 0xFFE01F;
const uint64_t IR_PLUS = 0xFFA857;
const uint64_t IR_EQ = 0xFF906F;

const uint64_t IR_ZERO = 0xFF6897;
const uint64_t IR_HUNDRET = 0xFF9867;
const uint64_t IR_TWOHUNDRET = 0xFFB04F;

const uint64_t IR_ONE = 0xFF30CF;
const uint64_t IR_TWO = 0xFF18E7;
const uint64_t IR_THREE = 0xFF7A85;

const uint64_t IR_FOUR = 0xFF10EF;
const uint64_t IR_FIVE = 0xFF38C7;
const uint64_t IR_SIX = 0xFF5AA5;

const uint64_t IR_SEVEN = 0xFF42BD;
const uint64_t IR_EIGHT = 0xFF4AB5;
const uint64_t IR_NINE = 0xFF52AD;

// IR receiver library parameters
const uint16_t IR_BUFFER_SIZE = 1024;
const uint8_t IR_MSG_TIMEOUT = 15;

// ------------------------
// Homematic stuff
// ------------------------
String ISE_ID = "24561"; //testvar

String ip = "192.168.66.64"; // Arduino IP-Adresse
const char * HomematicIP = "192.168.66.65"; // Homematic IP-Adresse
const uint16_t HomematicPort = 80; //The port of the TCP server is specified.

// -----------------------------------------------------------------------------
// Object and variable definitions
// -----------------------------------------------------------------------------

//EthernetClient client;
WiFiMulti WiFiMulti;
WiFiClient client;
bool connected;

//IR receive
IRrecv IrRecv(PIN_IRRECV, IR_BUFFER_SIZE, IR_MSG_TIMEOUT, true);

// Buffer for decoded IR command
decode_results irCmd;

// IR command status
bool irCmdAvailable = false; // True, if new IR code has been received and decoded

// Last IR command received and decoded
uint64_t irCmdValue = 0;

// -----------------------------------------------------------------------------
// Setup routine
// -----------------------------------------------------------------------------

void setup()
{
delay(1000);

if (DEBUG_ON)
{
Serial.begin(115200);
Serial.print("\nWaiting connect to WiFi...");
}

M5.begin(true, false, true); //Init Atom(Initialize serial port, LED).

M5.dis.setBrightness(10); // tried to set this - also to 100. But was not there when I damaged the status LED.

WiFiMulti.addAP("mywlan", "mypass"); //Add wifi configuration information.

while (WiFiMulti.run() != WL_CONNECTED) { //If the connection to wifi is not established successfully.
if (DEBUG_ON) Serial.print(".");
delay(300);
}

if (DEBUG_ON)
{
Serial.println("\nWiFi connected");
Serial.print("IP address: ");
Serial.println(WiFi.localIP());
}
// initialize the button object
M5.update();

IrRecv.enableIRIn(); // Switch on IR receiver after initialization

M5.dis.drawpix(0, 0x00ff00); //GREEN
}

// -----------------------------------------------------------------------------
// Main routine
// -----------------------------------------------------------------------------

void SendHttp(String IRVal)
{
M5.dis.drawpix(0, 0xfff000);
if (client.connect(HomematicIP, HomematicPort)) {
if (DEBUG_ON) Serial.println("connected");
if (DEBUG_ON) Serial.println("Value: (dec)" + IRVal);

client.println("GET /config/xmlapi/statechange.cgi?ise_id=24561&new_value=" + IRVal + " HTTP/1.0");
client.println(); // end HTTP header

/*while (client.available()) {
  char c = client.read();
  if (DEBUG_ON) Serial.print(c);
  }
*/

client.stop();

} else {
if (DEBUG_ON) Serial.println("connection failed");
M5.dis.drawpix(0, CRGB::Red); //RED
delay(1000);
}
M5.dis.drawpix(0, CRGB::Green); //GREEN

}

void loop()
{
bool irCmdOnOff = false;

// Determine the IR command state
irCmdAvailable = IrRecv.decode(&irCmd);

if (irCmdAvailable)
{
M5.dis.drawpix(0, CRGB::Blue); //BLUE
if (irCmd.repeat) // Is it a repetition of the previous IR command?
{
irCmdAvailable = false;
irCmdValue = 0x0;
M5.dis.drawpix(0, CRGB::Green); //GREEN
}
else {
// No repetition: retrieve the IR command
irCmdValue = irCmd.value;
}

IrRecv.resume();

if (irCmdAvailable)
{
  if (DEBUG_ON) Serial.print("IR: ");
  if (DEBUG_ON) Serial.println((unsigned long) irCmd.value, HEX);

  String IRValue = String((unsigned long)irCmd.value, HEX);
  SendHttp(IRValue);
}

}

// Process events "button released" or "IR on/off" respectively
if (M5.Btn.wasPressed() )
{
M5.dis.drawpix(0, CRGB::White); //GREEN
if (DEBUG_ON) Serial.println("Button pressed");
}

delay(TIME_CYCLE); // Pause before next pass through loop
}

I use the Arduino IDE and tried to get the IR Unit running. The functionality is there, so my gateway is working. But when I order new ATOM LITEs I'd like to know which failure I did....

Thanx
Christian