Implement handling for Power LED and big LED

src/main.cpp

@@ -3,14 +3,20 @@
 #include <WiFi.h>
  
 // GPIOs
-#define GPIO_EMERGENCY_LED 5
+#define GPIO_EMERGENCY_LED_SMALL 5
+#define GPIO_EMERGENCY_LED_RED 13
+#define GPIO_EMERGENCY_LED_GREEN 12
+#define GPIO_EMERGENCY_LED_BLUE 14
+
+#define GPIO_POWER_LED 18
 #define GPIO_SYNC_LED 19
 #define GPIO_REQUESTED_STATE_LED 2
+
 #define GPIO_EMERGENCY_BUTTON 16
 
 // Software Parameters
 #define LOOP_DELAY 1
-#define PING_TIMEOUT_NUM_LOOPS 2
+#define PING_TIMEOUT_NUM_LOOPS 3
 #define EMERGENCY_BUTTON_SCAN_RATE_SECONDS 1
 
 String macList[2] = {"24:6F:28:B1:EE:74", "24:6F:28:B2:40:8C"};
@@ -19,8 +25,9 @@ uint8_t macRemoteIntArr[6];
 esp_now_peer_info_t peerInfo={};
 int64_t lastPingUptimeInSeconds;
 volatile int64_t lastButtonPushUptimeInSeconds;
-boolean isReceiverEmergencyLedOn;
+volatile boolean isReceiverEmergencyLedOn;
 volatile boolean isSenderEmergency;
+TaskHandle_t BigLEDTask;
 
 typedef struct struct_info {
   boolean isEmergency;
@@ -29,7 +36,6 @@ typedef struct struct_info {
 } struct_info;
 struct_info myData;
 
-
 int64_t getUptimeInSeconds(){
   return esp_timer_get_time()/1000000;
 }
@@ -53,10 +59,10 @@ void OnDataRecv(const uint8_t * mac, const uint8_t *incomingData, int len) {
   } 
 
   if(myData.isEmergency) {
-    digitalWrite(GPIO_EMERGENCY_LED,HIGH);
+    digitalWrite(GPIO_EMERGENCY_LED_SMALL,HIGH);
     isReceiverEmergencyLedOn=true;
   } else {
-    digitalWrite(GPIO_EMERGENCY_LED,LOW);
+    digitalWrite(GPIO_EMERGENCY_LED_SMALL,LOW);
     isReceiverEmergencyLedOn=false;
   }
 }
@@ -71,6 +77,7 @@ void OnButtonPushed(){
   }
 }
 
+// Convert single hex char to integer
 int char2int(char input)
 {
   if(input >= '0' && input <= '9')
@@ -93,9 +100,79 @@ void hex2bin(const char* src, uint8_t* target)
   }
 }
 
+// the big LED should flash when we are in emergency state.
+void BigLEDTaskCode(void * parameter){
+  // Test the channels of the big LED
+  digitalWrite(GPIO_EMERGENCY_LED_GREEN,LOW);
+  digitalWrite(GPIO_EMERGENCY_LED_BLUE,LOW);
+  digitalWrite(GPIO_EMERGENCY_LED_RED,HIGH);
+  sleep(1);
+  digitalWrite(GPIO_EMERGENCY_LED_RED,LOW);
+  digitalWrite(GPIO_EMERGENCY_LED_GREEN,HIGH);
+  sleep(1);
+  digitalWrite(GPIO_EMERGENCY_LED_GREEN,LOW);
+  digitalWrite(GPIO_EMERGENCY_LED_BLUE,HIGH);
+  sleep(1);
+  digitalWrite(GPIO_EMERGENCY_LED_BLUE,LOW);
+  
+  // Blink in emergecy mode.
+  for(;;){
+    if (isReceiverEmergencyLedOn){
+      digitalWrite(GPIO_EMERGENCY_LED_BLUE,HIGH);
+      delay(100);
+      digitalWrite(GPIO_EMERGENCY_LED_BLUE,LOW);
+
+      delay(250);
+      digitalWrite(GPIO_EMERGENCY_LED_RED,HIGH);
+      delay(100);
+      digitalWrite(GPIO_EMERGENCY_LED_RED,LOW);
+
+      delay(500);
+    }
+  }
+}
+
+void setPowerLEDBrightness(int brightnessValue){
+  // setting PWM properties
+  const int freq = 5000;
+  const int ledChannel = 0;
+  const int resolution = 8;
+
+  ledcSetup(ledChannel, freq, resolution);
+  ledcAttachPin(GPIO_POWER_LED, ledChannel);
+  ledcWrite(ledChannel, brightnessValue);
+}
+
 void setup(){
+  // GPIO Setup
+  pinMode(GPIO_POWER_LED,OUTPUT);
+  pinMode(GPIO_EMERGENCY_LED_RED,OUTPUT);
+  pinMode(GPIO_EMERGENCY_LED_GREEN,OUTPUT);
+  pinMode(GPIO_EMERGENCY_LED_BLUE,OUTPUT);
+  pinMode(GPIO_EMERGENCY_LED_SMALL, OUTPUT);
+  pinMode(GPIO_REQUESTED_STATE_LED, OUTPUT);
+  pinMode(GPIO_SYNC_LED,OUTPUT);
+  pinMode(GPIO_EMERGENCY_BUTTON,INPUT_PULLDOWN);
+
+  // Initialize state
+  digitalWrite(GPIO_POWER_LED,HIGH); //Power LED ON
+  digitalWrite(GPIO_REQUESTED_STATE_LED,LOW);
+  digitalWrite(GPIO_EMERGENCY_LED_SMALL,LOW);
+  digitalWrite(GPIO_SYNC_LED,LOW);
+
+  myData.isPing=1;
+  myData.macOfSender="";
+  isReceiverEmergencyLedOn=false;
+  myData.isEmergency=false;
+  isSenderEmergency=false;
+  lastButtonPushUptimeInSeconds=getUptimeInSeconds();
+
+  // The button triggers an interrupt, attach callback function
+  attachInterrupt(GPIO_EMERGENCY_BUTTON, OnButtonPushed, RISING);
+
   sleep(LOOP_DELAY);  // give the serial monitor a moment to connect.
   Serial.begin(115200);
+
   WiFi.mode(WIFI_MODE_STA);
   macLocal=WiFi.macAddress();
   macRemote=macList[macList[0]==macLocal?1:0];
@@ -116,18 +193,7 @@ void setup(){
   macRemoteNoColon.replace(":","");
   char macRemoteNoColonCharArr[13];
   macRemoteNoColon.toCharArray(macRemoteNoColonCharArr,sizeof(macRemoteNoColonCharArr));
-  
-  for (int i=0;i<12;i++){
-    Serial.print( macRemoteNoColonCharArr[i]);
-    Serial.print(".");
-  }
-  Serial.println("<--- HEX CA");
-
   hex2bin(macRemoteNoColonCharArr,macRemoteIntArr);
-  for (int i=0;i<6;i++){
-    Serial.printf( "%d|%X - ",macRemoteIntArr[i],macRemoteIntArr[i]);
-  }
-  Serial.println("<--- DEC REM");
   memcpy(peerInfo.peer_addr, macRemoteIntArr, 6);
   peerInfo.channel = 0;  
   peerInfo.encrypt = false;
@@ -142,23 +208,8 @@ void setup(){
   // Register for a callback function that will be called when data is received
   esp_now_register_recv_cb(OnDataRecv);
 
-  pinMode(GPIO_EMERGENCY_LED, OUTPUT);
-  pinMode(GPIO_REQUESTED_STATE_LED, OUTPUT);
-
-  digitalWrite(GPIO_REQUESTED_STATE_LED,LOW);
-  digitalWrite(GPIO_EMERGENCY_LED,LOW);
-  pinMode(GPIO_SYNC_LED,OUTPUT);
-  digitalWrite(GPIO_SYNC_LED,LOW);
-
-  pinMode(GPIO_EMERGENCY_BUTTON,INPUT_PULLDOWN);
-  attachInterrupt(GPIO_EMERGENCY_BUTTON, OnButtonPushed, RISING);
-
-  myData.isPing=1;
-  myData.macOfSender="";
-  isReceiverEmergencyLedOn=false;
-  myData.isEmergency=false;
-  isSenderEmergency=false;
-  lastButtonPushUptimeInSeconds=getUptimeInSeconds();
+  // The BIG LED blinking is running in it's own task
+  xTaskCreatePinnedToCore(BigLEDTaskCode,"BigLEDHandler",10000,NULL,0,&BigLEDTask,0); 
 }
  
 void loop(){
@@ -184,12 +235,16 @@ void loop(){
   Serial.println(myData.isEmergency?"EMERGENGY ON":"EMERGENCY OFF");
   Serial.println((isSenderEmergency==1)?"SEN EMERG ON":"SEN EMERG OFF");
   
-  digitalWrite(GPIO_SYNC_LED,LOW);
+  // Control the SYNC-LED, if we didn't receive a ping for too long, the LED is switched off
   if ((getUptimeInSeconds()-lastPingUptimeInSeconds) < (LOOP_DELAY*PING_TIMEOUT_NUM_LOOPS)) {
-    delay(3);
     digitalWrite(GPIO_SYNC_LED,HIGH);
+  }  else {
+    digitalWrite(GPIO_SYNC_LED,LOW);  
   } 
 
+  // To indicate the device hasn't crashed we vary the brightess of the power LED
+  setPowerLEDBrightness((getUptimeInSeconds()%5*20)+50);
+
   switch (result) {
     case  ESP_OK:
       Serial.println("[" +macLocal+ "] Sent with success");