ESP8266 - analogRead(A0) return 65535

Stephan35

@jkandasa
In fact i don't really know where i have to post ... what is your suggest about it ?
Thanks

jkandasa

@Stephan35 If you see any issues and do you think it is bug? Please raise it on GitHub. If you queries please raise it here.

Stephan35

@jkandasa
In fact To be fair, for now I am not able to judge if this is a bug or not, so I will not post anymore on github.

njbuch

Can you show your exact working example?

Stephan35

@njbuch said:

Can you show your exact working example?

Here is my full example :

#include <MyController.h>

MyController mc;




#define SENSOR_LED_BLEU "LED BLEU"
#define SENSOR_LED_ROUGE "LED ROUGE"
#define SENSOR_LED_VERTE "LED VERTE"
#define SENSOR_LUXMETRE "LUXMETRE"
#define BP_GPIO4 "Bouton RESET"
#define BP_GPIO5 "Bouton Test 1"
#define BP_GPIO14 "Bouton Test 2"

//Relay pins
#define PIN_RELAY_1 2
#define PIN_BP_GPIO4 4
#define PIN_BP_GPIO5 5
#define PIN_LED_VERTE 12
#define PIN_LED_BLEU 13
#define PIN_BP_GPIO14 14
#define PIN_LED_ROUGE 15



//Sensors
#define SENSOR_RELAY_1 "relay-1"




unsigned long lastRecu = 0;
bool Gpio5_Checked = false;
bool Gpio14_Checked = false;
unsigned long Gpio5_millis = 0;
unsigned long Gpio14_millis = 0;

unsigned long Scan_Gpio = 0;
int Gpio4_S = 0; // Gpio 4 state
int Gpio5_S = 0; // Gpio 5 state
int Gpio14_S = 0; // Gpio 14 state
int Gpio4_LS = 0; // Gpio 4 Last state
int Gpio5_LS = 0; // Gpio 5 Last state
int Gpio14_LS = 0; // Gpio 14 Last state


//in_esp/ESP_8C0125/LUXMETRE/C_SET/V_LIGHT_LEVEL/0
//n_esp/ESP_8C0125/LUXMETRE/C_SET/V_LEVEL/0

//out_esp/ESP_8C0125/SENSOR_BC/C_INTERNAL/LUXMETRE/0
//_message.update(BC_SENSOR, C_INTERNAL, SENSOR_LUXMETRE);


void sendLUX(){
  McMessage _message;
  //_message.update(SENSOR_LUXMETRE, C_SET, "V_LIGHT_LEVEL");
  //char _luxmeter[21];
 // snprintf_P(_luxmeter, 20, "%s", analogRead(A0) );
  Serial.print("Envoie de Luxmeter:");
  Serial.println(analogRead(A0));
  //snprintf_P(_luxmeter, 20, "%d", String(analogRead(A0)));
  ////send(_message.set(_luxmeter));
  _message.update(SENSOR_LUXMETRE, C_SET, V_LEVEL);
  //snprintf_P(_luxmeter, 20, "%d", analogRead(A0));
  send(_message.set(analogRead(A0)));
}

//in_esp/ESP_8C0125/Bouton Test/C_SET/V_TRIPPED/0
/*
void sendPin5(){
  McMessage _message;
  _message.update(BP_GPIO5, C_SET, V_TRIPPED);
  if (digitalRead(PIN_BP_GPIO5) == HIGH){
  	send(_message.set(1));
  	Serial.println("BP = 1");
  }
  if (digitalRead(PIN_BP_GPIO5) == LOW){
  	send(_message.set(0));
  	Serial.println("BP = 0");
  }
}
void sendPin14(){
  McMessage _message;
  _message.update(BP_GPIO14, C_SET, V_TRIPPED);
  if (digitalRead(PIN_BP_GPIO14) == HIGH){
  	send(_message.set(1));
  	Serial.println("BP2 = 1");
  }
  if (digitalRead(PIN_BP_GPIO14) == LOW){
  	send(_message.set(0));
  	Serial.println("BP2 = 0");
  }
}
*/

void sendPin4(int val){
  	McMessage _message;
  	_message.update(BP_GPIO4, C_SET, V_STATUS);
  	send(_message.set(val));
  	Serial.print("Changement de Pin4 : ");
  	Serial.println(val);
}

void sendPin5(int val){
  	McMessage _message;
  	_message.update(BP_GPIO5, C_SET, V_STATUS);
  	send(_message.set(val));
  	Serial.print("Changement de Pin5 : ");
  	Serial.println(val);
}
void sendPin14(int val){
  	McMessage _message;
  	_message.update(BP_GPIO14, C_SET, V_STATUS);
  	send(_message.set(val));
  	Serial.print("Changement de Pin14 : ");
  	Serial.println(val);
}

/*
void Pin5Change(){
	if (millis() - Gpio5_millis > 75){
    	delayMicroseconds(32000);
    	Serial.println("\n*** Pin5 Interrupt");
    	Gpio5_Checked = true;
    	Gpio5_millis = millis();
    	detachInterrupt(PIN_BP_GPIO5);
    }
}
void Pin14Change(){
	if (millis() - Gpio14_millis > 75){
	    delayMicroseconds(32000);
	    Serial.println("\n*** Pin14 Interrupt");
	    Gpio14_Checked = true;
	    Gpio14_millis = millis();
	    detachInterrupt(PIN_BP_GPIO14);
	}
}
*/



void before(){
  //Your code before this library inialize
}

void presentation(){
  //Send node name and version information
  sendSketchInfo("Module de test", "1.0.0");

  //Send sensor name and type
  present(S_BINARY, SENSOR_RELAY_1, "Relay 01");
  //request current status
  request(SENSOR_RELAY_1, V_STATUS);


  present(S_BINARY, SENSOR_LED_BLEU, SENSOR_LED_BLEU);
  //request current status
  request(SENSOR_LED_BLEU, V_STATUS);

  present(S_BINARY, SENSOR_LED_ROUGE, SENSOR_LED_ROUGE);
  //request current status
  request(SENSOR_LED_ROUGE, V_STATUS);

  present(S_BINARY, SENSOR_LED_VERTE, SENSOR_LED_VERTE);
  //request current status
  request(SENSOR_LED_VERTE, V_STATUS);

  //present(S_LIGHT, SENSOR_LUXMETRE, SENSOR_LUXMETRE);
  //request(SENSOR_LUXMETRE, "V_LIGHT_LEVEL");


  present(S_DIMMER, BP_GPIO4, BP_GPIO4);
  request(BP_GPIO4, V_STATUS);

  present(S_DOOR, BP_GPIO5, BP_GPIO5);
  request(BP_GPIO5, V_STATUS);

  present(S_DOOR, BP_GPIO14, BP_GPIO14);
  request(BP_GPIO14, V_STATUS);

}

void receiveTime(unsigned long mcTimestamp){
  //Do something with received time
}

void receive(McMessage &message) {
	if(message.isSensorOf(SENSOR_RELAY_1) && message.isSubTypeOf(V_STATUS)){
	    digitalWrite(PIN_RELAY_1, message.getUInt());
	}
	if(message.isSensorOf(SENSOR_LED_BLEU) && message.isSubTypeOf(V_STATUS)){
	    digitalWrite(PIN_LED_BLEU, message.getUInt());
	}
	if(message.isSensorOf(SENSOR_LED_ROUGE) && message.isSubTypeOf(V_STATUS)){
	    digitalWrite(PIN_LED_ROUGE, message.getUInt());
	}
	if(message.isSensorOf(SENSOR_LED_VERTE) && message.isSubTypeOf(V_STATUS)){
	    digitalWrite(PIN_LED_VERTE, message.getUInt());
	}
}


void setup() {
    pinMode(A0, INPUT);
  	pinMode(PIN_BP_GPIO4, INPUT);
  	pinMode(PIN_BP_GPIO5, INPUT);
  	pinMode(PIN_BP_GPIO14, INPUT);
  	pinMode(PIN_RELAY_1, OUTPUT);
  	pinMode(PIN_LED_BLEU, OUTPUT);
  	pinMode(PIN_LED_ROUGE, OUTPUT);
  	pinMode(PIN_LED_VERTE, OUTPUT);
  	if(!isSystemConfigured()){
    //You can check, does this node/device configured. If no you can display/blink some led from here.
  	}
  //attachInterrupt(PIN_BP_GPIO5, (Pin5Change), CHANGE);
  //attachInterrupt(PIN_BP_GPIO14, (Pin14Change), CHANGE); //digitalPinToInterrupt(x)
}

void loop() {
	mc.loop();
	long now = millis();
	if (now - Scan_Gpio > 200 ){
		Gpio4_S = digitalRead(PIN_BP_GPIO4);
		Gpio5_S = digitalRead(PIN_BP_GPIO5);
		Gpio14_S = digitalRead(PIN_BP_GPIO14);
		if (Gpio4_S != Gpio4_LS ){
			sendPin4(((Gpio4_S == HIGH) ? 1 : 0));
			Gpio4_LS = Gpio4_S;
		}
		if (Gpio5_S != Gpio5_LS ){
			sendPin5(((Gpio5_S == HIGH) ? 1 : 0));
			Gpio5_LS = Gpio5_S;
		}
		if (Gpio14_S != Gpio14_LS ){
			sendPin14(((Gpio14_S == HIGH) ? 1 : 0));
			Gpio14_LS = Gpio14_S;
		}
		Scan_Gpio = now;
		Serial.print(".");

	}
  
  /*
  if (Gpio5_Checked) {
  	Gpio5_Checked = false;
  	sendPin5();
  	yield();
  	attachInterrupt(PIN_BP_GPIO5, (Pin5Change), CHANGE);
  }
  if (Gpio14_Checked) {
  	Gpio14_Checked = false;
  	sendPin14();
  	yield();
  	attachInterrupt(PIN_BP_GPIO14, (Pin14Change), CHANGE);
  }
  */
  //You can add your logic here.
  	if (now - lastRecu > 30000 ) {
    	lastRecu = now;
    	//sendRSSI();
    	sendLUX();
    	//send(SENSOR_LUXMETRE, analogRead(A0));
  	}
}

Take care of this : need to be improve , i am a beginer with MyController , and this example is not clean !

Hope will help you

Best regards.

njbuch

Thanks will try out a variant of this!

@Stephan35 I dont see any presentation of the SENSOR_LUXMETRE it seems to have been removed from your code, why is that?

Do you have a light-color sensor? And what is the exact sensor-type? Do you have a link?

njbuch

I have tried, and I am now realizing that the ADC on ESP8266 has a smaller voltage span at 0.0 - 1.0V.

I will need to adjust my voltage divider and retry, I am guessing thats why the reading keeps very high, because it never goes below 1.0V. Let us know what happens in your lab....

Stephan35

@njbuch
You have to adjust electonic input with a input divide voltage :
0_1489325656696_photo_bb.gif.png

You will find full of example to explain how to.

A i tried to explain, my example need to be improve , tested, and modified as need.

Best regards.

njbuch

@Stephan35 Indeed but my voltage divider used was aiming for 0.0 - 3.3 and resulting output was over 1 volt most of the time, which means that I am reading 65535 all the time. I need a new one.

I am looking in my bins after a few resistors that matches my photo-resistor specs. Will revert when successfull. I am using: http://www.ohmslawcalculator.com/voltage-divider-calculator to find the right combination.

Stephan35

@njbuch said:

@Stephan35 Indeed but my voltage divider used was aiming for 0.0 - 3.3 and resulting output was over 1 volt most of the time, which means that I am reading 65535 all the time. I need a new one.

I am looking in my bins after a few resistors that matches my photo-resistor specs. Will revert when successfull. I am using: http://www.ohmslawcalculator.com/voltage-divider-calculator to find the right combination.

Sorry,
answer is there : analogRead(A0) return 65535

You have to modify Myconfig.h

#define ENABLE_READ_VCC

ESP8266 - analogRead(A0) return 65535

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