Arduino library to read VCC supply level without external components
License: GNU Lesser General Public License v2.1
When trying to compile a sketch using this library and the Minicore board manager version 2.0.8 for a 328P 1MHz board, the compiler gives following errors:
"C:\\Users\\Eric\\AppData\\Local\\Temp\\arduino_build_851041\\libraries\\VccBatteryPercent\\Vcc.cpp.o"
In file included from C:\Users\Eric\Documents\Arduino\libraries\VccBatteryPercent\Vcc.h:27:0,
from C:\Users\Eric\Documents\Arduino\libraries\VccBatteryPercent\Vcc.cpp:24:
C:\Users\Eric\Documents\Arduino\libraries\VccBatteryPercent\Vcc.cpp: In member function 'float Vcc::Read_Perc(float, float, boolean)':
C:\Users\Eric\AppData\Local\Arduino15\packages\MiniCore\hardware\avr\2.0.8\cores\MCUdude_corefiles/Arduino.h:133:22: error: 'l' was not declared in this scope
typeof (low) _l = (l); \
^
C:\Users\Eric\Documents\Arduino\libraries\VccBatteryPercent\Vcc.cpp:75:12: note: in expansion of macro 'constrain'
perc = constrain(perc, 0.0, 100.0);
^~~~~~~~~
C:\Users\Eric\AppData\Local\Arduino15\packages\MiniCore\hardware\avr\2.0.8\cores\MCUdude_corefiles/Arduino.h:133:22: note: suggested alternative: '_l'
typeof (low) _l = (l); \
^
C:\Users\Eric\Documents\Arduino\libraries\VccBatteryPercent\Vcc.cpp:75:12: note: in expansion of macro 'constrain'
perc = constrain(perc, 0.0, 100.0);
^~~~~~~~~
C:\Users\Eric\AppData\Local\Arduino15\packages\MiniCore\hardware\avr\2.0.8\cores\MCUdude_corefiles/Arduino.h:134:23: error: 'h' was not declared in this scope
typeof (high) _h = (h); \
^
C:\Users\Eric\Documents\Arduino\libraries\VccBatteryPercent\Vcc.cpp:75:12: note: in expansion of macro 'constrain'
perc = constrain(perc, 0.0, 100.0);
^~~~~~~~~
C:\Users\Eric\AppData\Local\Arduino15\packages\MiniCore\hardware\avr\2.0.8\cores\MCUdude_corefiles/Arduino.h:134:23: note: suggested alternative: '_h'
typeof (high) _h = (h); \
^
C:\Users\Eric\Documents\Arduino\libraries\VccBatteryPercent\Vcc.cpp:75:12: note: in expansion of macro 'constrain'
perc = constrain(perc, 0.0, 100.0);
^~~~~~~~~
C:\Users\Eric\AppData\Local\Arduino15\packages\MiniCore\hardware\avr\2.0.8\cores\MCUdude_corefiles/Arduino.h:135:35: error: expected ';' before '}' token
_x < _l ? _l : _x > _h ? _h :_x })
^
C:\Users\Eric\Documents\Arduino\libraries\VccBatteryPercent\Vcc.cpp:75:12: note: in expansion of macro 'constrain'
perc = constrain(perc, 0.0, 100.0);
^~~~~~~~~
When doing a compile of the same sketch using the Minicore version 2.0.7, no compiler errors.
https://github.com/MCUdude/MiniCore/releases/tag/v2.0.8
Changelog:
- Fix export compiled binary for Windows computers
- Improve "unsafe" macros
- This includes abs(), min(), max(), sq(), round() and constrain()
The problem probably lies in the improved 'unsafe' macros like constrain()...
Your example VccSleep.ino, makes arduino pull 200 micro Amps in LowPower.
Commenting out Vcc.h code, gives correct LowPower of 4.5 micro Amps.
Tested on Pro mini 8Mhz.
It's not only your Vcc code that does this, but all readVcc code I found online does this.
I would be glad to see any solution to this.
4.5uA code:
#include <Vcc.h>
#include <LowPower.h>
const float VccMin = 2.0*0.6; // Minimum expected Vcc level, in Volts. Example for 2xAA Alkaline.
const float VccMax = 2.0*1.5; // Maximum expected Vcc level, in Volts. Example for 2xAA Alkaline.
const float VccCorrection = 1.0/1.0; // Measured Vcc by multimeter divided by reported Vcc
Vcc vcc(VccCorrection);
void setup()
{
Serial.begin(9600);
}
void loop()
{
// float v = vcc.Read_Volts();
// Serial.print("VCC = ");
// Serial.print(v);
// Serial.println(" Volts");
//
// float p = vcc.Read_Perc(VccMin, VccMax);
// Serial.print("VCC = ");
// Serial.print(p);
// Serial.println(" %");
//
// delay(200); //delay to allow serial to fully print before sleep
LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
}
Hi,
I would be grateful to know whether this library depends on either the ADC module or the timer2 on the chip.
Many thanks.
Kind regards
Mo.
Hello - I want to make sure I understand what I need to do to get the correct values in in the below line. It looks like I should measure the voltage of the battery power supply for the numerator and then run the code with the ratio = 1.0 and get the denominator and then plug in the respective values. Is this correct?
const float VccCorrection = 1.0/1.0; // Measured Vcc by multimeter divided by reported Vcc
Thank you,
AFI
When using analogRead function above pin 7 VCC is giving "inf" result.
Hi,
I tried to compile the VccSimple example on the new Arduino Nano Every (ATMEGA4809) and get the following errors. Are you planning support for this new board?
Thanks
Stephan
Arduino: 1.8.9 (Mac OS X), Board: "Arduino Nano Every, ATMEGA328"
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp: In member function 'float Vcc::Read_Volts()':
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:45:7: error: 'ADMUX' was not declared in this scope
if (ADMUX != ADMUX_VCCWRT1V1)
^~~~~
In file included from /Users/stephan/Library/Arduino15/packages/arduino/tools/avr-gcc/7.3.0-atmel3.6.1-arduino5/avr/include/avr/io.h:99:0,
from /Users/stephan/Library/Arduino15/packages/arduino/tools/avr-gcc/7.3.0-atmel3.6.1-arduino5/avr/include/avr/pgmspace.h:90,
from /Users/stephan/Library/Arduino15/packages/arduino/hardware/megaavr/1.8.1/cores/arduino/api/String.h:30,
from /Users/stephan/Library/Arduino15/packages/arduino/hardware/megaavr/1.8.1/cores/arduino/api/Print.h:24,
from /Users/stephan/Library/Arduino15/packages/arduino/hardware/megaavr/1.8.1/cores/arduino/api/Stream.h:25,
from /Users/stephan/Library/Arduino15/packages/arduino/hardware/megaavr/1.8.1/cores/arduino/api/Client.h:22,
from /Users/stephan/Library/Arduino15/packages/arduino/hardware/megaavr/1.8.1/cores/arduino/api/ArduinoAPI.h:29,
from /Users/stephan/Library/Arduino15/packages/arduino/hardware/megaavr/1.8.1/cores/arduino/Arduino.h:23,
from /Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.h:27,
from /Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:24:
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:38:30: error: 'REFS0' was not declared in this scope
#define ADMUX_VCCWRT1V1 (_BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1))
^
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:45:16: note: in expansion of macro 'ADMUX_VCCWRT1V1'
if (ADMUX != ADMUX_VCCWRT1V1)
^~~~~~~~~~~~~~~
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:38:30: note: suggested alternative: 'VREF_t'
#define ADMUX_VCCWRT1V1 (_BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1))
^
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:45:16: note: in expansion of macro 'ADMUX_VCCWRT1V1'
if (ADMUX != ADMUX_VCCWRT1V1)
^~~~~~~~~~~~~~~
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:38:43: error: 'MUX3' was not declared in this scope
#define ADMUX_VCCWRT1V1 (_BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1))
^
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:45:16: note: in expansion of macro 'ADMUX_VCCWRT1V1'
if (ADMUX != ADMUX_VCCWRT1V1)
^~~~~~~~~~~~~~~
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:38:55: error: 'MUX2' was not declared in this scope
#define ADMUX_VCCWRT1V1 (_BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1))
^
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:45:16: note: in expansion of macro 'ADMUX_VCCWRT1V1'
if (ADMUX != ADMUX_VCCWRT1V1)
^~~~~~~~~~~~~~~
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:38:67: error: 'MUX1' was not declared in this scope
#define ADMUX_VCCWRT1V1 (_BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1))
^
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:45:16: note: in expansion of macro 'ADMUX_VCCWRT1V1'
if (ADMUX != ADMUX_VCCWRT1V1)
^~~~~~~~~~~~~~~
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:55:3: error: 'ADCSRA' was not declared in this scope
ADCSRA |= _BV(ADSC);
^~~~~~
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:55:3: note: suggested alternative: 'ADC_t'
ADCSRA |= _BV(ADSC);
^~~~~~
ADC_t
In file included from /Users/stephan/Library/Arduino15/packages/arduino/tools/avr-gcc/7.3.0-atmel3.6.1-arduino5/avr/include/avr/io.h:99:0,
from /Users/stephan/Library/Arduino15/packages/arduino/tools/avr-gcc/7.3.0-atmel3.6.1-arduino5/avr/include/avr/pgmspace.h:90,
from /Users/stephan/Library/Arduino15/packages/arduino/hardware/megaavr/1.8.1/cores/arduino/api/String.h:30,
from /Users/stephan/Library/Arduino15/packages/arduino/hardware/megaavr/1.8.1/cores/arduino/api/Print.h:24,
from /Users/stephan/Library/Arduino15/packages/arduino/hardware/megaavr/1.8.1/cores/arduino/api/Stream.h:25,
from /Users/stephan/Library/Arduino15/packages/arduino/hardware/megaavr/1.8.1/cores/arduino/api/Client.h:22,
from /Users/stephan/Library/Arduino15/packages/arduino/hardware/megaavr/1.8.1/cores/arduino/api/ArduinoAPI.h:29,
from /Users/stephan/Library/Arduino15/packages/arduino/hardware/megaavr/1.8.1/cores/arduino/Arduino.h:23,
from /Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.h:27,
from /Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:24:
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:55:17: error: 'ADSC' was not declared in this scope
ADCSRA |= _BV(ADSC);
^
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:55:17: note: suggested alternative: 'ADC0'
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:61:28: error: 'ADC' was not declared in this scope
float vcc = 1.1*1024.0 / ADC;
^~~
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:61:28: note: suggested alternative: 'ADC0'
float vcc = 1.1*1024.0 / ADC;
^~~
ADC0
exit status 1
Arduino: 1.8.9 (Mac OS X), Board: "Arduino Nano Every, None (ATMEGA4809)"
Build-Optionen wurden verändert, alles wird neu kompiliert
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp: In member function 'float Vcc::Read_Volts()':
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:45:7: error: 'ADMUX' was not declared in this scope
if (ADMUX != ADMUX_VCCWRT1V1)
^~~~~
In file included from /Users/stephan/Library/Arduino15/packages/arduino/tools/avr-gcc/7.3.0-atmel3.6.1-arduino5/avr/include/avr/io.h:99:0,
from /Users/stephan/Library/Arduino15/packages/arduino/tools/avr-gcc/7.3.0-atmel3.6.1-arduino5/avr/include/avr/pgmspace.h:90,
from /Users/stephan/Library/Arduino15/packages/arduino/hardware/megaavr/1.8.1/cores/arduino/api/String.h:30,
from /Users/stephan/Library/Arduino15/packages/arduino/hardware/megaavr/1.8.1/cores/arduino/api/Print.h:24,
from /Users/stephan/Library/Arduino15/packages/arduino/hardware/megaavr/1.8.1/cores/arduino/api/Stream.h:25,
from /Users/stephan/Library/Arduino15/packages/arduino/hardware/megaavr/1.8.1/cores/arduino/api/Client.h:22,
from /Users/stephan/Library/Arduino15/packages/arduino/hardware/megaavr/1.8.1/cores/arduino/api/ArduinoAPI.h:29,
from /Users/stephan/Library/Arduino15/packages/arduino/hardware/megaavr/1.8.1/cores/arduino/Arduino.h:23,
from /Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.h:27,
from /Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:24:
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:38:30: error: 'REFS0' was not declared in this scope
#define ADMUX_VCCWRT1V1 (_BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1))
^
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:45:16: note: in expansion of macro 'ADMUX_VCCWRT1V1'
if (ADMUX != ADMUX_VCCWRT1V1)
^~~~~~~~~~~~~~~
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:38:30: note: suggested alternative: 'VREF_t'
#define ADMUX_VCCWRT1V1 (_BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1))
^
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:45:16: note: in expansion of macro 'ADMUX_VCCWRT1V1'
if (ADMUX != ADMUX_VCCWRT1V1)
^~~~~~~~~~~~~~~
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:38:43: error: 'MUX3' was not declared in this scope
#define ADMUX_VCCWRT1V1 (_BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1))
^
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:45:16: note: in expansion of macro 'ADMUX_VCCWRT1V1'
if (ADMUX != ADMUX_VCCWRT1V1)
^~~~~~~~~~~~~~~
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:38:55: error: 'MUX2' was not declared in this scope
#define ADMUX_VCCWRT1V1 (_BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1))
^
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:45:16: note: in expansion of macro 'ADMUX_VCCWRT1V1'
if (ADMUX != ADMUX_VCCWRT1V1)
^~~~~~~~~~~~~~~
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:38:67: error: 'MUX1' was not declared in this scope
#define ADMUX_VCCWRT1V1 (_BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1))
^
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:45:16: note: in expansion of macro 'ADMUX_VCCWRT1V1'
if (ADMUX != ADMUX_VCCWRT1V1)
^~~~~~~~~~~~~~~
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:55:3: error: 'ADCSRA' was not declared in this scope
ADCSRA |= _BV(ADSC);
^~~~~~
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:55:3: note: suggested alternative: 'ADC_t'
ADCSRA |= _BV(ADSC);
^~~~~~
ADC_t
In file included from /Users/stephan/Library/Arduino15/packages/arduino/tools/avr-gcc/7.3.0-atmel3.6.1-arduino5/avr/include/avr/io.h:99:0,
from /Users/stephan/Library/Arduino15/packages/arduino/tools/avr-gcc/7.3.0-atmel3.6.1-arduino5/avr/include/avr/pgmspace.h:90,
from /Users/stephan/Library/Arduino15/packages/arduino/hardware/megaavr/1.8.1/cores/arduino/api/String.h:30,
from /Users/stephan/Library/Arduino15/packages/arduino/hardware/megaavr/1.8.1/cores/arduino/api/Print.h:24,
from /Users/stephan/Library/Arduino15/packages/arduino/hardware/megaavr/1.8.1/cores/arduino/api/Stream.h:25,
from /Users/stephan/Library/Arduino15/packages/arduino/hardware/megaavr/1.8.1/cores/arduino/api/Client.h:22,
from /Users/stephan/Library/Arduino15/packages/arduino/hardware/megaavr/1.8.1/cores/arduino/api/ArduinoAPI.h:29,
from /Users/stephan/Library/Arduino15/packages/arduino/hardware/megaavr/1.8.1/cores/arduino/Arduino.h:23,
from /Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.h:27,
from /Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:24:
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:55:17: error: 'ADSC' was not declared in this scope
ADCSRA |= _BV(ADSC);
^
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:55:17: note: suggested alternative: 'ADC0'
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:61:28: error: 'ADC' was not declared in this scope
float vcc = 1.1*1024.0 / ADC;
^~~
/Users/stephan/Projects/arduino/libraries/Arduino_Vcc/Vcc.cpp:61:28: note: suggested alternative: 'ADC0'
float vcc = 1.1*1024.0 / ADC;
^~~
ADC0
exit status 1
Hi,
Thank you for the great library. Hower a question and a problem.
I am using the Arduino Pro Mini (ATMega328P) 3.3V version.
Problem: I go in PowerDown (for 8 seconds). However in most cases the percentage reading is 0 (zero). Had anyone the same problem? After investigation I found out that the reading is correct until the first PowerDown (LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_ON);). After the first wakeup it reads always 0 (float p = vcc.Read_Perc(VCC_MIN, VCC_MAX);).
Question: When using the LiPo, the battery has a typical voltage of 3.7, but can go to 4.2 when fully charged. The LiPo is connected to the "RAW". What is the vcc_max to use? As far as I understood, the measurement is done after the (internal) regulator on the Vin (so +-3.3 max, correct?). So what is then the min and max to use.
Recommendation: would also be great to add an example with voltage higher than 3V. You are using only 2 alkaline in your example of 1.5...
Thanks again!
Filip
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