About battery level

bmanos

Hello,
I have a question regarding the battery level
If I have any sensor how could I show the battery level? Do I need extra code inside my .ino sketch or should I adjust something in the settings of the mycontroller panel
I am using the mysensors nodes and gateway

Thanks

jkandasa

@bmanos you should send it from your node. refer this code

bmanos

Thanks
I already see this in my yesterday searches but when I try to Include to existing node code I cannot have both of values for example in my moisture sensor the value never change, Obviously I have somewhere an error in my code but I don't know where
I will try again today and If I cannot do anything I will ask for your help again
Thanks

Anduril

In case you can post your sensor code here I can have a look at it. Normally you just use sendBatteryLevel(batteryPcnt); in your sketch and it will be send (I think) with sensor ID 255 to the controller

bmanos

@Anduril Thanks for helping me on this

get a look at the following pleas

This is the code without the battery

// Enable debug prints to serial monitor
#define MY_DEBUG

// Enable and select radio type attached
#define MY_RADIO_NRF24

#define CHILD_ID 0
#include <MySensors.h>

// Here we are setting up some water thresholds that we will
// use later. Note that you will need to change these to match
// your soil type and environment. It doesn't do much for me because I'm using domoticz
int thresholdUp = 400;
int thresholdDown = 075;

MyMessage msg(CHILD_ID, V_LEVEL);
unsigned long SLEEP_TIME = 30000;

// We are setting up the pin A0 on the redboard to be our sensor
// pin input:
int sensorPin = A0;

const int buzzer = 8; //buzzer to arduino pin 8

void setup(){
  pinMode(buzzer, OUTPUT); // Set buzzer - pin 8 as an output
}

void presentation()
{
sendSketchInfo("Soil Moisture Sensor", "1.0");
present(CHILD_ID, S_MOISTURE);
}

void loop()
{
int sensorValue;
sensorValue = analogRead(sensorPin);
//send back the values
send(msg.set(sensorValue));
if (sensorValue <= 800){
  tone(buzzer, 2000); 
  delay(1000);        
  noTone(buzzer);     
  delay(500);        
  Serial.println(sensorValue);
}
else{
  Serial.println(sensorValue);
  }
// delay until next measurement (msec)

sleep(SLEEP_TIME);

}

This is the code with battery code that seems to work ( I am waiting for the battery to run out to see if the values shown are correct)

// Enable debug prints to serial monitor
#define MY_DEBUG

// Enable and select radio type attached
#define MY_RADIO_NRF24

#define CHILD_ID 0
#include <MySensors.h>

// Here we are setting up some water thresholds that we will
// use later. Note that you will need to change these to match
// your soil type and environment. It doesn't do much for me because I'm using domoticz
int thresholdUp = 400;
int thresholdDown = 075;

MyMessage msg(CHILD_ID, V_LEVEL);
unsigned long SLEEP_TIME = 30000;
//unsigned long SLEEP_TIME = 900000;  //15 minutes

// We are setting up the pin A0 on the redboard to be our sensor
// pin input:
int sensorPin = A0;

const int buzzer = 8; //buzzer to arduino pin 8

void setup(){
  pinMode(buzzer, OUTPUT); // Set buzzer - pin 8 as an output
}

void presentation()
{
sendSketchInfo("Soil Moisture Sensor", "1.0");
present(CHILD_ID, S_MOISTURE);
}

void loop()
{
int sensorValue;
sensorValue = analogRead(sensorPin);
//send back the values
send(msg.set(sensorValue));
if (sensorValue <= 800){
  tone(buzzer, 2000);
  delay(1000);       
  noTone(buzzer);    
  delay(1000);       
  Serial.println(sensorValue);
}
else{
  Serial.println(sensorValue);
  }
// delay until next measurement (msec)

  #define MIN_V 2700
  #define MAX_V 4100
  int batteryPcnt = min(map(readVcc(), MIN_V, MAX_V, 0, 100), 100); // Convert voltage to percentage
  sendBatteryLevel(batteryPcnt); // Send battery percentage to gateway

sleep(SLEEP_TIME);

}

  long readVcc() {
    // Read 1.1V reference against AVcc
    // set the reference to Vcc and the measurement to the internal 1.1V reference
    #if defined(__AVR_ATmega32U4__) || defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
      ADMUX = _BV(REFS0) | _BV(MUX4) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1);
    #elif defined (__AVR_ATtiny24__) || defined(__AVR_ATtiny44__) || defined(__AVR_ATtiny84__)
      ADMUX = _BV(MUX5) | _BV(MUX0);
    #elif defined (__AVR_ATtiny25__) || defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__)
      ADMUX = _BV(MUX3) | _BV(MUX2);
    #else
      ADMUX = _BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1);
    #endif  
   
    delay(2); // Wait for Vref to settle
    ADCSRA |= _BV(ADSC); // Start conversion
    while (bit_is_set(ADCSRA,ADSC)); // measuring
   
    uint8_t low  = ADCL; // must read ADCL first - it then locks ADCH  
    uint8_t high = ADCH; // unlocks both
   
    long result = (high<<8) | low;
   
    result = 1125300L / result; // Calculate Vcc (in mV); 1125300 = 1.1*1023*1000
    return result; // Vcc in millivolts
  }

And this is the code with the battery from mysensors that is not working as I don't t get values from the soil moisture sensor and I am not sure that the battery level is working

// Enable debug prints to serial monitor
#define MY_DEBUG

// Enable and select radio type attached
#define MY_RADIO_NRF24

#define CHILD_ID 0
#include <MySensors.h>

// Here we are setting up some water thresholds that we will
// use later. Note that you will need to change these to match
// your soil type and environment. It doesn't do much for me because I'm using domoticz
int thresholdUp = 400;
int thresholdDown = 075;

MyMessage msg(CHILD_ID, V_LEVEL);
unsigned long SLEEP_TIME = 30000;

// We are setting up the pin A0 on the redboard to be our sensor
// pin input:
int sensorPin = A1;
int BATTERY_SENSE_PIN = A0;  // select the input pin for the battery sense point

const int buzzer = 8; //buzzer to arduino pin 8

int oldBatteryPcnt = 0;

void setup(){
  pinMode(buzzer, OUTPUT); // Set buzzer - pin 8 as an output
// use the 1.1 V internal reference
#if defined(__AVR_ATmega2560__)
  analogReference(INTERNAL1V1);
#else
  analogReference(INTERNAL);
#endif
}

void presentation()
{
sendSketchInfo("Soil Moisture Sensor", "1.0");
present(CHILD_ID, S_MOISTURE);
}

void loop()
{
int sensorValue;
sensorValue = analogRead(sensorPin);
//send back the values
send(msg.set(sensorValue));
if (sensorValue <= 800){
  tone(buzzer, 2000);
  delay(1000);       
  noTone(buzzer);     
  delay(500);        
  Serial.println(sensorValue);
}
else{
  Serial.println(sensorValue);
  }
// delay until next measurement (msec)

// get the battery Voltage
  int sensorValueBat = analogRead(BATTERY_SENSE_PIN);
#ifdef MY_DEBUG
  Serial.println(sensorValueBat);
#endif

  // 1M, 470K divider across battery and using internal ADC ref of 1.1V
  // Sense point is bypassed with 0.1 uF cap to reduce noise at that point
  // ((1e6+470e3)/470e3)*1.1 = Vmax = 3.44 Volts
  // 3.44/1023 = Volts per bit = 0.003363075

  int batteryPcnt = sensorValueBat / 10;

#ifdef MY_DEBUG
  float batteryV  = sensorValueBat * 0.003363075;
  Serial.print("Battery Voltage: ");
  Serial.print(batteryV);
  Serial.println(" V");

  Serial.print("Battery percent: ");
  Serial.print(batteryPcnt);
  Serial.println(" %");
#endif

  if (oldBatteryPcnt != batteryPcnt) {
    // Power up radio after sleep
    sendBatteryLevel(batteryPcnt);
    oldBatteryPcnt = batteryPcnt;
  }

sleep(SLEEP_TIME);

}

Also I have another issue I would like that the sleep function works differently for the sensor and for the battery level and I cannot figure how to do this yet

Thanks

Anduril

Hey,

I have a sensor working also using the readVCC lib as in your working example. But I don't see any obvious problem in your example using the voltage divider to read the battery voltage. Maybe you have a problem in your hardware connection to pin A1?
Also one suggestion: between sending 2 messages, I prefer to include a wait(50). I had problems with lost messages when sending too fast, maybe my caps were depleted and my voltage dropped during sending.
For your other problem I know how to do this, here an example:

int counter=0

void loop()
if counter=120 {
   sendBatteryLevel(batteryPcnt);
   counter=0;
}
counter++
sleep(30000);

That way your battery is transmitted only once an hour, I use this also for my own sensor and it works great.

bmanos

@Anduril thanks
I will try your code for sending the battery status once an hour
As for the A0, A1, A2 etc pins when I am using them alone they worked just fine but when I have A0 on battery and A1 on soil moisture the A1 never sends any signal (for the battery I don't know as the sensor don't work I did not connect the battery)

bmanos

Hell @Anduril I try to add your code for having moisture level every 30 seconds and battery level every 50 minutes but look at my serial monitor I get the two values at the same time.
Probably I am doing something wrong. Could you have a look at the loop code one more time please

2413 MCO:SLP:WUP=-1
2415 TSF:MSG:READ,0-0-2,s=255,c=3,t=6,pt=0,l=6,sg=0:Metric
2422 TSF:MSG:SEND,2-2-0-0,s=0,c=1,t=37,pt=2,l=2,sg=0,ft=0,st=OK:1021
1021
2433 TSF:MSG:SEND,2-2-0-0,s=255,c=3,t=0,pt=1,l=1,sg=0,ft=0,st=OK:100
2439 MCO:SLP:MS=30000,SMS=0,I1=255,M1=255,I2=255,M2=255
2444 MCO:SLP:TPD
2446 MCO:SLP:WUP=-1
2450 TSF:MSG:SEND,2-2-0-0,s=0,c=1,t=37,pt=2,l=2,sg=0,ft=0,st=OK:1022
1022
2460 TSF:MSG:SEND,2-2-0-0,s=255,c=3,t=0,pt=1,l=1,sg=0,ft=0,st=OK:100
2467 MCO:SLP:MS=30000,SMS=0,I1=255,M1=255,I2=255,M2=255
2472 MCO:SLP:TPD

my loop code is here:

void loop()
{
int sensorValue;
sensorValue = analogRead(sensorPin);
send(msg.set(sensorValue));

if (sensorValue <= 800){
  tone(buzzer, 2000); 
  delay(1000);        
  noTone(buzzer);     
  delay(1000);        
}
else{
  }

// Battery
  #define MIN_V 2700
  #define MAX_V 3700
  int batteryPcnt = min(map(readVcc(), MIN_V, MAX_V, 0, 100), 100); // Convert voltage to percentage
  int counter=0;

if (counter = 120) {
   sendBatteryLevel(batteryPcnt);
   counter=0;
}
counter++;

sleep(30000);
}

jkandasa

@bmanos

I see an error, if (counter = 120) should be if (counter == 120)

bmanos

thanks @jkandasa I will correct this
Is the rest of code Ok?

jkandasa

@bmanos I do not see any other issues

Anduril

@bmanos you should declare int counterin the header, not in the void loop(). The way you did it I think it will be set to 0 in each loop, never reaching 120. And of course @jkandasa is right, it has to be if (counter == 120)

bmanos

thanks again @jkandasa and @Anduril for your help

Tag

@bmanos said in About battery level:

delay until ne

One thing i saw in your sketch is this line

  delay(1000);

Delay will stop all processing, also the mysensors code...
what you preferably should use is:

wait(1000);

In this case mysensors is still able to process
(just a little tip which will help coding, see this link for more information)

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