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Power 04: Getting battery level

This example shows how to get the remaining battery level.

Required Materials

1 x Waspmote 1 x MiniUSB wire 1 x Battery

Notes

- WARNING: This example is suitable for rechargeable batteries only. Non-rechargeable batteries always show a plain discharge curve, so it is not possible to know how much power is left. - This example can be executed in Waspmote v12 and Waspmote v15

Code

/*
* ------ [PWR_4] Getting Battery Level Example --------
*
* Explanation: This example shows how to get the remaining battery
* level.
*
* WARNING: This example is suitable for rechargeable batteries only.
* Non-rechargeable batteries always show a plain discharge curve,
* so it is not possible to know how much power is left.
*
* Copyright (C) 2016 Libelium Comunicaciones Distribuidas S.L.
* http://www.libelium.com
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*
* Version: 3.0
* Design: David Gascón
* Implementation: Marcos Yarza
*/
char WARNING_MESSAGE[] =\
"\n-------------------------------------------------------------------\n"\
"WARNING: This example is suitable for rechargeable batteries only.\n"\
"Non-rechargeable batteries always show a plain discharge curve,\n"\
"so it is not possible to know how much power is left.\n"
"-------------------------------------------------------------------\n";
void setup()
{
// Open the USB connection
USB.ON();
USB.println(F("PWR_4 example"));
// show warning
USB.println( WARNING_MESSAGE );
}
void loop()
{
// Show the remaining battery level
USB.print(F("Battery Level: "));
USB.print(PWR.getBatteryLevel(),DEC);
USB.print(F(" %"));
// Show the battery Volts
USB.print(F(" | Battery (Volts): "));
USB.print(PWR.getBatteryVolts());
USB.println(F(" V"));
delay(5000);
}

Output

H#
PWR_4 example
-------------------------------------------------------------------
WARNING: This example is suitable for rechargeable batteries only.
Non-rechargeable batteries always show a plain discharge curve,
so it is not possible to know how much power is left.
-------------------------------------------------------------------
Battery Level: 100 % | Battery (Volts): 4.2290000915 V
Battery Level: 100 % | Battery (Volts): 4.2290000915 V
Battery Level: 100 % | Battery (Volts): 4.2290000915 V
Battery Level: 100 % | Battery (Volts): 4.2290000915 V
Last modified 2yr ago