时间戳

首页 > 解决方案 > BMP280 报告奇数输出 RPi

raspberry-pi - BMP280 报告奇数输出 RPi

问题描述

连接到我的 RPi0W 的 BMP280 报告一致的 133.90 摄氏度（应该在 25 度左右......）同样报告超过 500 万帕斯卡压力（应该在 100,000 左右。）

温度 = 133.90 *C 压力 = 5611578.00 Pa 高度 = -50829.45 m 海平面压力 = 5611578.00 Pa

我正在使用 Adafruit Python 测试程序（只有 6 行代码......没有错误指示）我所做的唯一更改是引用 I2C 地址 0x76 而不是默认的 0x77，因为我没有使用 Adafruit 品牌 BMP280 .

#!/usr/bin/python
# Copyright (c) 2014 Adafruit Industries
# Author: Tony DiCola
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

# Can enable debug output by uncommenting:
#import logging
#logging.basicConfig(level=logging.DEBUG)

import Adafruit_BMP.BMP085 as BMP085

# Default constructor will pick a default I2C bus.
#
# For the Raspberry Pi this means you should hook up to the only exposed I2C bus
# from the main GPIO header and the library will figure out the bus number based
# on the Pi's revision.
#
# For the Beaglebone Black the library will assume bus 1 by default, which is
# exposed with SCL = P9_19 and SDA = P9_20.
sensor = BMP085.BMP085(address=0x76)

# Optionally you can override the bus number:
#sensor = BMP085.BMP085(busnum=2)

# You can also optionally change the BMP085 mode to one of BMP085_ULTRALOWPOWER,
# BMP085_STANDARD, BMP085_HIGHRES, or BMP085_ULTRAHIGHRES.  See the BMP085
# datasheet for more details on the meanings of each mode (accuracy and power
# consumption are primarily the differences).  The default mode is STANDARD.
#sensor = BMP085.BMP085(mode=BMP085.BMP085_ULTRAHIGHRES)
print(sensor.read_temperature())
print('Temp = {0:0.2f} *C'.format(sensor.read_temperature()))
print('Pressure = {0:0.2f} Pa'.format(sensor.read_pressure()))
print('Altitude = {0:0.2f} m'.format(sensor.read_altitude()))
print('Sealevel Pressure = {0:0.2f} Pa'.format(sensor.read_sealevel_pressure()))

Adafruit 检测器确实可以正确检测到 I2C 地址 0x76。

连接到同一块板上的 DHT11 报告的温度大致准确为 84 华氏度（它位于我笔记本电脑的排气流中……哈哈）

我应该检查什么？

标签： raspberry-pii2c

解决方案

设备品牌是“gybmep”。经过一些额外的搜索，我发现我可能使用了错误的 Adafruit 库。我发现了另一种方法

“在树莓派上使用 BMP280 温度/压力传感器”

看来我应该一直在使用 Adafruit BME280 库。从那个库示例代码中，我得到了合理的结果。

推荐阅读