++ed by:
SREZIC BINJOY CREDO
1 non-PAUSE user
Author image Gligan Calin Horea
and 1 contributors

NAME

RPi::PIGPIO::Device::BMP180 - Read temperature and atmospheric pressure from a BMP180 sensor

DESCRIPTION

Uses the pigpiod to read temperature and atmospheric pressure from a BMP180 sensor

SYNOPSIS

    use RPi::PIGPIO;
    use RPi::PIGPIO::Device::BMP180;

    my $pi = RPi::PIGPIO->connect('192.168.1.10');

    my $bmp180 = RPi::PIGPIO::Device::BMP180->new($pi,1);

    $bmp180->read_sensor(); #trigger a read

    print "Temperature : ".$bmp180->temperature." C\n";
    print "Presure : ".$bmp180->presure." mbar\n";

METHODS

new

Create a new object

Usage:

    my $bmp180 = RPi::PIGPIO::Device::BMP180->new($pi,$spi,$address);

Arguments:

  • $pi - an instance of RPi::PIGPIO

  • $spi - SPI to which the sensor is connected (defaults to 1)

  • $address - address of the sensor (defaults to 0x77)

read_sensor

Trigger a read from the sensor. You need to call this method whenever you want to get the latest values

Usage :

    $bmp180->read_sensor();

    print "Presure : ".$bmp180->presure()." mbar";

pressure

Returns the atmospheric pressure in mbar

temperature

Returns the temperature in C

chip_id

Returns the chip id

chip_version

Returns the chip version

PRIVATE METHODS

compile_calibration_info

Return an signed int from after putting together 2 consecutive values from the calibration data

compile_unsigned_calibration_info

Return an unsigned int from after putting together 2 consecutive values from the calibration data

ensure_c_long

Make sure the given number is a C signed long value (32 bit)

ensure_c_short

Make sure the given number is a C signed short value (16 bit)