{"id":6928,"date":"2019-10-10T15:56:02","date_gmt":"2019-10-10T06:56:02","guid":{"rendered":"https:\/\/techclass.wfjydl.com\/?p=6928"},"modified":"2022-03-28T15:32:26","modified_gmt":"2022-03-28T07:32:26","slug":"%e5%88%a9%e7%94%a8ae-bme280%e5%92%8craspberry-pi%e8%af%bb%e5%8f%96%e6%b8%a9%e5%ba%a6%e3%80%81%e6%b9%bf%e5%ba%a6%e5%92%8c%e5%8e%8b%e5%8a%9b%e5%80%bc","status":"publish","type":"post","link":"https:\/\/techclass.wfjydl.com\/knowledge\/deviceplus\/how-tos\/raspberry\/reading-temperature-humidity-and-pressure-with-ae-bme280-and-raspberry-pi","title":{"rendered":"\u5229\u7528AE-BME280\u548cRaspberry Pi\u8bfb\u53d6\u6e29\u5ea6\u3001\u6e7f\u5ea6\u548c\u538b\u529b\u503c"},"content":{"rendered":"
\n\u8fd9\u7bc7\u6587\u7ae0\u6765\u6e90\u4e8eDevicePlus.com<\/a>\u82f1\u8bed\u7f51\u7ad9\u7684\u7ffb\u8bd1\u7a3f\u3002\"bme280\"<\/p>\n

\u5728\u672c\u6559\u7a0b\u4e2d\uff0c\u6211\u4eec\u5c06\u4f7f\u7528\u4e00\u4e2a\u591a\u529f\u80fd\u6a21\u5757\uff0c\u534f\u52a9Raspberry Pi\u540c\u65f6\u6d4b\u91cf\u6e29\u5ea6\u3001\u6e7f\u5ea6\u548c\u6c14\u538b\u4e09\u79cd\u53c2\u6570\u3002<\/span><\/p>\n

\u8be5\u9879\u76ee\u9700\u8981\u710a\u63a5\uff01\u5982\u4e0a\u56fe\u6240\u793a\uff0c\u8be5\u90e8\u4ef6\u5e26\u6709\u4e00\u4e2a\u5355\u72ec\u7684\u6392\u9488\uff0c\u56e0\u6b64\u6211\u4eec\u9700\u8981\u5c06\u5176\u710a\u63a5\u5230\u9762\u5305\u677f\u4e0a\u3002<\/span><\/p>\n

AE-BME280<\/b><\/h2>\n
\n

\"bme280\"<\/p>\n

\u56fe1\uff1aAE-BME280 \/ \u00a9 Akizuki Denshi<\/p>\n<\/div>\n

\u4f7f\u7528BME280\u7684\u6e29\u5ea6\/\u6e7f\u5ea6\/\u538b\u529b\u4f20\u611f\u5668\u6a21\u5757\u5957\u4ef6BME280<\/span><\/i><\/a>\uff08\u65e5\u8bed\uff09<\/span><\/i>
\n<\/span><\/i>\u51ed\u501f\u642d\u8f7dBosch Sensortec BMP280\u7684\u4f20\u611f\u5668\u6a21\u5757\uff0c\u60a8\u53ef\u4ee5\u540c\u65f6\u6d4b\u91cf\u6e29\u5ea6\u3001\u6e7f\u5ea6\u548c\u6c14\u538b\u3002\u8be5\u6a21\u5757\u8fd8\u53ef\u4ee5\u901a\u8fc7I2C\u6216SPI\u4e0e\u5fae\u63a7\u5236\u5668\u901a\u4fe1\u3002<\/span><\/i><\/p>\n

\u6211\u4eec\u5c06\u5728\u672c\u6559\u7a0b\u4e2d\u4f7f\u7528\u8fd9\u6b3e\u8d85\u7d27\u51d1\u578bAE-BME280\u538b\u529b\u4f20\u611f\u5668\uff08\u5c3a\u5bf8\uff1a16x10mm\uff09\u3002\u8be5\u6a21\u5757\u91c7\u8d2d\u4e8e\u65e5\u672c\u96f6\u4ef6\u4f9b\u5e94\u5546Akizuki Denshi\uff0c\u60a8\u4e5f\u53ef\u4ee5\u4f7f\u7528\u5177\u6709\u76f8\u540c\u82af\u7247\u7684Adafruit BME280\u6a21\u5757\u3002\u8bf7\u6ce8\u610f\uff0cAdafruit\u7684\u5f15\u811a\u5e03\u5c40\u7565\u6709\u4e0d\u540c\uff0c\u56e0\u6b64\u8fde\u7ebf\u65f6\u8bf7\u52a1\u5fc5\u53c2\u8003\u5176\u6280\u672f\u89c4\u683c\u4e66\u3002<\/span><\/p>\n

Adafruit BME280 \u6280\u672f\u89c4\u683c\u4e66<\/span><\/a><\/p>\n

BME280\u2014\u2014\u4e00\u5757\u4f4d\u4e8e\u5143\u4ef6\u4e2d\u5fc3\u7684\u5fae\u5c0f\u94f6\u82af\u7247\u2014\u2014\u627f\u62c5\u4e86\u5927\u90e8\u5206\u5de5\u4f5c\u3002\u8be5\u6a21\u5757\u8868\u9762\u4e0a\u8fd8\u6709\u4e00\u4e2a\u975e\u5e38\u5c0f\u7684\u5f00\u53e3\uff0c\u5176\u4f5c\u7528\u662f\u8bfb\u53d6\u6570\u503c\uff0c\u56e0\u6b64\u5207\u52ff\u906e\u76d6\u8fd9\u4e2a\u5f00\u53e3\u3002<\/span><\/p>\n

AE-BME280\u677f\u548c\u6392\u9488\u672c\u6765\u5c31\u662f\u5206\u5f00\u7684\u3002\u8fde\u63a5Raspberry Pi\u7684\u6700\u7b80\u5355\u65b9\u6cd5\u5c31\u662f\u5c06\u4e24\u8005\u7ec4\u88c5\u5728\u4e00\u8d77\uff0c\u5982\u56fe1\u6240\u793a\u3002\u8fd9\u9700\u8981\u710a\u63a5\u3002\u6211\u8d2d\u4e70\u7684\u6392\u9488\u670910\u4e2a\u5f15\u811a\uff0c\u4f46\u662f\u8fde\u63a5AE-BME280\u53ea\u97006\u4e2a\u5f15\u811a\uff0c\u6240\u4ee5\u5e94\u526a\u6389\u7b2c6\u4e2a\u5f15\u811a\u540e\u9762\u7684\u6392\u9488\u3002<\/span><\/p>\n

\u6280\u672f\u89c4\u683c\u8bf7\u53c2\u89c1AE-BME280\u7684<\/span>\u65e5\u8bed\u624b\u518c<\/span><\/a>\u3002<\/span><\/p>\n

\u60a8\u53ef\u4ee5\u7528I2C\u6216SPI\u8fdb\u884c\u901a\u4fe1\u3002\u7531\u4e8e\u6211\u4e4b\u524d\u5df2\u7ecf\u7528\u8fc7SPI\uff0c\u6240\u4ee5\u8fd9\u6b21\u6211\u5c06\u5c1d\u8bd5\u4f7f\u7528I2C\u3002<\/span><\/p>\n

I2C \u2013 \u7ef4\u57fa\u767e\u79d1<\/i><\/b>
\n<\/span><\/i>I2C\uff08\u96c6\u6210\u7535\u8def\u603b\u7ebf\uff09\u662f\u4e00\u79cd\u7531Philips Semiconductor\uff08\u73b0\u4e3aNXP Semiconductors\uff09\u53d1\u660e\u7684\u4e32\u884c\u603b\u7ebf\u3002I2C\u4ee3\u8868I-\u5e73\u65b9-C\u3002\u7531\u4e8e\u7eaf\u6587\u672c\u73af\u5883\u4e2d\u7684\u5b57\u7b26\u9650\u5236\uff0c\u6211\u4eec\u5c06\u5176\u79f0\u4e3aI2C\u6216IIC\u3002\u8be5\u534f\u8bae\u901a\u5e38\u7528\u4e8e\u5c06\u4f4e\u901f\u5916\u56f4IC\u8fde\u81f3\u4e3b\u677f\u3001\u5d4c\u5165\u5f0f\u7cfb\u7edf\u548c\u79fb\u52a8\u7535\u8bdd\u7b49\u8bbe\u5907\u3002<\/span><\/p>\n

\n

\"bme280\"<\/p>\n

\u56fe2\uff1a\u5f15\u811a\u7f16\u53f7\u548c\u529f\u80fd\u2013\u6458\u81eaAE-BME280\u6280\u672f\u89c4\u683c\u4e66<\/p>\n<\/div>\n

\u8fde\u63a5I2C\u6216SPI\u662f\u4e0d\u540c\u7684\uff0c\u6240\u4ee5\u6211\u4eec\u5fc5\u987b\u6ce8\u610f\u5f15\u811a\u63a5\u6cd5\u3002\u8bf7\u53c2\u9605<\/span>AE-BME280 \u6280\u672f\u89c4\u683c\u4e66<\/span><\/a> (\u65e5\u8bed)\u6216<\/span>Adafruit BME280 \u6280\u672f\u89c4\u683c\u4e66\uff08\u82f1\u8bed\uff09<\/span><\/a>\u3002<\/span><\/p>\n

\u5982\u56fe2\u6240\u793a\uff0c\u4f7f\u7528I2C\u65f6\uff0c\u6211\u4eec\u9700\u8981\u710a\u63a5 <\/span>J3<\/b> \u8df3\u7ebf\u3002\u6211\u4eec\u5fc5\u987b\u5728\u6b64\u8df3\u7ebf\u5904\u586b\u5145\u710a\u9521\u3002\u8bf7\u6ce8\u610f\uff0c\u8fd9\u4ec5\u9002\u7528\u4e8eAE-BME280\u82af\u7247\u3002Adafruit\u82af\u7247\u4e0d\u9700\u8981\u8bbe\u7f6e\u6b64\u8df3\u7ebf\u3002<\/span><\/p>\n

\u710a\u63a5!<\/b><\/h2>\n
\n

\"bme280\"<\/p>\n

\u56fe3\uff1a\u710a\u63a5\u8bbe\u5907<\/p>\n<\/div>\n

\u73b0\u5728\uff0c\u662f\u65f6\u5019\u710a\u63a5\u4e86\uff01\u9996\u5148\u5e94\u52a0\u70ed\u70d9\u94c1\u3002<\/span><\/p>\n

\u710a\u9521 \u2013 \u7ef4\u57fa\u767e\u79d1<\/i><\/b>
\n<\/span><\/i>\u710a\u9521\u662f\u4e00\u79cd\u4e3b\u8981\u7531\u94c5\u548c\u9521\u7ec4\u6210\u7684\u5408\u91d1\uff0c\u4e0e\u7535\u70d9\u94c1\u914d\u5408\u4f7f\u7528\u3002\u4e3b\u8981\u7528\u4e8e\u8fde\u63a5\u91d1\u5c5e\u5143\u4ef6\uff0c\u4ee5\u53ca\u5c06\u7535\u6c14\u5143\u4ef6\u710a\u63a5\u5230\u7535\u8def\u677f\u4e0a\u3002\u6839\u636e\u5176\u6210\u5206\uff0c\u710a\u9521\u4f1a\u57284-10\u5ea6\u65f6\u53d8\u6210\u8d85\u5bfc\u4f53\u3002<\/span><\/i><\/p>\n

\u6211\u5728\u8fd9\u4e2a\u9879\u76ee\u4e2d\u7528\u7684\u662f<\/span>\u8fd9\u79cd<\/span><\/a>\u710a\u9521\u3002\u8fd9\u79cd\u710a\u9521\u975e\u5e38\u67d4\u97e7\uff0c\u5bb9\u6613\u6cc4\u6f0f\uff0c\u56e0\u6b64\u53ea\u80fd\u4e00\u70b9\u4e00\u70b9\u5730\u9001\u9521\u3002\u6211\u4eec\u8fd8\u5e94\u51c6\u5907\u4e00\u4e2a\u5438\u9521\u5668\uff0c\u4ee5\u9632\u4e07\u4e00\u3002\u5982\u679c\u9001\u9521\u8fc7\u591a\uff0c\u53ef\u4ee5\u7528\u5438\u9521\u5668\u5438\u6389\u591a\u4f59\u7684\u710a\u9521\uff0c\u6240\u4ee5\u8981\u5c0f\u5fc3\uff01<\/span><\/p>\n

\n

\"bme280\"<\/p>\n

\u56fe4\uff1a\u710a\u63a5J3<\/p>\n<\/div>\n

\u9996\u5148\uff0c\u6211\u4eec\u5e94\u710a\u63a5\u56fe4\u6240\u793a\u7684J3\u8df3\u7ebf\u3002J3\u4e0e\u76f8\u90bb\u5f15\u811a\u9760\u7684\u5f88\u8fd1\uff0c\u6240\u4ee5\u8981\u5c0f\u5fc3\u4e0d\u8981\u710a\u63a5\u5728\u4e00\u8d77\u3002\u9001\u9521\u65f6\u8981\u5c0f\u5fc3\u4ed4\u7ec6\uff01<\/span><\/p>\n

 <\/p>\n

\n

\"bme280\"<\/p>\n

\u56fe5\uff1a\u710a\u63a5\u6392\u9488<\/p>\n<\/div>\n

\u4e0b\u4e00\u6b65\u662f\u8fde\u63a5\u6392\u9488\u3002\u6211\u4ece\u7535\u8def\u677f\u80cc\u9762\u710a\u63a5\u6392\u9488\u3002\u5f15\u811a\u4e4b\u95f4\u7684\u95f4\u9699\u975e\u5e38\u5c0f\uff0c\u56e0\u6b64\u5f88\u96be\u5c06\u7535\u70d9\u94c1\u585e\u5165\u3002\u7535\u8def\u677f\u4e24\u7aef\u5f15\u811a\u7684\u710a\u9521\u7ed3\u5757\u793a\u4f8b\u5982\u56fe5\u6240\u793a\u3002<\/span><\/p>\n

\u710a\u63a5\u6280\u5de7\u662f\u5148\u7528\u70d9\u94c1\u5934\u7a0d\u7a0d\u52a0\u70ed\u5f15\u811a\uff0c\u7136\u540e\u518d\u9001\u9521\u3002\u5982\u679c\u70d9\u94c1\u5c16\u8fc7\u70ed\uff0c\u710a\u9521\u4f1a\u71c3\u70e7\u5e76\u5f62\u6210\u7ed3\u5757\u3002\u56e0\u6b64\uff0c\u6211\u5efa\u8bae\u710a\u5b8c\u4e00\u4e2a\u5f15\u811a\u540e\uff0c\u4ece\u7535\u6e90\u63d2\u5ea7\u4e0a\u62d4\u4e0b\u7535\u70d9\u94c1\u5e76\u51b7\u5374\u540e\u518d\u710a\u63a5\u4e0b\u4e00\u4e2a\u5f15\u811a\u3002\u4e0d\u5fc5\u7740\u6025\u3002\u5c0f\u5fc3\u4e0d\u8981\u5c06\u5f15\u811a\u710a\u63a5\u5728\u4e00\u8d77\u3002\u6162\u6162\u6765\uff01<\/span><\/p>\n

\n

\"bme280\"<\/p>\n

\u56fe6\uff1a\u8fde\u81f3\u9762\u5305\u677f\u7684AE-BME280<\/p>\n<\/div>\n

\u5b8c\u6210\uff01\u6392\u9488\u710a\u63a5\u5b8c\u6bd5\uff0c\u73b0\u5728\u7535\u8def\u677f\u5782\u76f4\u63d2\u5728\u9762\u5305\u677f\u4e0a\u3002<\/span><\/p>\n

\u710a\u63a5\u65f6\uff0c\u6211\u4e0d\u5c0f\u5fc3\u78b0\u5230\u4e86\u6392\u9488\u672b\u7aef\u5e76\u7a0d\u5fae\u70eb\u4e86\u4e00\u4e0b\uff0c\u4f46\u5e78\u8fd0\u7684\u662f\u8fd9\u5e76\u6ca1\u6709\u5f71\u54cd\u8bfb\u6570\u3002<\/span><\/p>\n

\u63a5\u7ebf<\/b><\/h2>\n

\u73b0\u5728\uff0c\u8ba9\u6211\u4eec\u5c06Raspberry Pi\u8fde\u63a5\u5230AE-BME280\u3002\u8fde\u63a5\u793a\u610f\u56fe\u5982\u56fe7\u6240\u793a\uff0c\u56e0\u4e3a\u6211\u4eec\u4f7f\u7528\u7684\u662fI2C\u901a\u4fe1\u3002<\/span><\/p>\n

\n

\"bme280\"<\/p>\n

\u56fe7\uff1aI2C\u8fde\u63a5\u65b9\u6cd5\u2013\u6458\u81eaAE-BME280\u6280\u672f\u89c4\u683c\u4e66<\/p>\n<\/div>\n

\u5728Raspberry Pi\u4e0a\uff0c\u201cSDA\u201d\u8fde\u81f3GPIO2\uff08\u5f15\u811a3\uff09\uff0c\u201cSCL\u201d\u8fde\u5230GPIO3\uff08\u5f15\u811a5\uff09\u3002VDD\u8fde\u63a5\u5230\u5f15\u811a1\uff0c\u8fd9\u6837\u524d3\u4e2aGPIO\u5f15\u811a\u6309\u987a\u5e8f\u6392\u5217\uff08\u53c2\u89c1\u56fe8\uff09\u3002\u63a5\u7ebf\u65f6\u5bb9\u6613\u8bb0\u5fc6\u3002<\/span><\/p>\n

 <\/p>\n

\n

\"bme280\"<\/p>\n

\u56fe8\uff1a\u63a5\u7ebf\u793a\u610f\u56fe<\/p>\n<\/div>\n

\u6211\u5c06AE-BME280\u4e0a\u7684\u5f15\u811a5\uff08SDO\uff09\u8fde\u81f3GND\uff0c\u60a8\u4e5f\u53ef\u4ee5\u5c06\u5176\u8fde\u81f3VDD\u3002\uff08\u8bf7\u6ce8\u610f\uff0c\u5982\u679c\u8fd9\u6837\u505a\uff0c\u6570\u636e\u6536\u96c6\u5730\u5740\u4f1a\u53d1\u751f\u53d8\u5316\uff09\u3002<\/span><\/p>\n

\u8bbe\u7f6e Raspberry Pi<\/b><\/h2>\n

Raspberry Pi\u9ed8\u8ba4\u7981\u7528I2C\u3002\u542f\u7528I2C\u7684\u65b9\u6cd5\u4e0e\u542f\u7528SPI\u7684\u65b9\u6cd5\u76f8\u540c\uff0c\u8bf7\u53c2\u9605\u4e0a\u4e00\u4e2a\u6559\u7a0b\uff1a<\/span>Raspberry Pi WebIOPi\u7269\u8054\u7f51\uff0c\u6a21\u62df\u8f93\u5165\u7f16\u7a0b<\/b><\/a>\u3002\u5728\u83dc\u5355\u4e2d\u9009\u62e9[Preferences] – [Raspberry Pi Configuration]\uff0c\u7136\u540e\u6253\u5f00\u201cSettings \u201d\u5c4f\u5e55\u3002<\/span><\/p>\n

\n

\"bme280\"<\/p>\n

\u70b9\u51fb[Interfaces]\u9009\u9879\u5361\uff0c\u5c06[I2C]\u8bbe\u4e3a[Enable]\n<\/div>\n

\u5fc5\u987b\u91cd\u65b0\u542f\u52a8\u7cfb\u7edf\u8be5\u8bbe\u7f6e\u624d\u80fd\u751f\u6548\uff0c\u56e0\u6b64\u8bf7\u5728\u5f39\u51fa\u7a97\u53e3\u4e2d\u5355\u51fb\u201cYes\u201d\u3002\u91cd\u542f\u540e\uff0cI2C\u4f20\u8f93\u5df2\u542f\u7528\u3002<\/span><\/p>\n

\"bme280\"<\/p>\n

\uff08OS: 2015\u5e7411\u670821\u65e5\u53d1\u5e03\u7684Raspbian Jessie\u7248\u672c\uff09<\/span><\/p>\n

\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5b89\u88c5\u4f7f\u7528I2C\u6240\u9700\u7684\u8f6f\u4ef6\u5305\u3002\u6211\u4eec\u9700\u8981\u5728\u547d\u4ee4\u884c\u4e2d\u4f7f\u7528[i2c-tools]\uff0c\u5728Python\u4e2d\u4f7f\u7528[python-smbus]\u3002<\/span><\/p>\n

\u5b89\u88c5\u547d\u4ee4<\/span>
\n<\/span>sudo apt-get install i2c-tools<\/span>
\n<\/span>sudo apt-get python-smbus<\/span><\/p>\n

\u5982\u679c\u8fd0\u884c\u547d\u4ee4\u201ci2cdetect\u201d\uff0c\u7cfb\u7edf\u4f1a\u68c0\u6d4b\u901a\u8fc7I2C\u65b9\u5f0f\u8fde\u63a5\u7684\u6240\u6709\u8bbe\u5907\u3002<\/span><\/p>\n

sudo i2cdetect -y 1<\/span><\/p>\n

\n

\"bme280\"<\/p>\n

76\u662f\u5341\u516d\u8fdb\u5236\u6570\uff1b\u4ee3\u88680x76\u3002<\/p>\n<\/div>\n

\u6ce8\uff1a\u9009\u62e9I2C\u5730\u5740\u65f6\uff0c\u5982\u679c\u7535\u8def\u677f\uff08SDO\uff09\u4e0a\u7684\u5f15\u811a5\u8fde\u81f3GND\uff0c\u90a3\u4e48\u9ed8\u8ba4\u4e3a[0x76]\uff1b\u5982\u679c\u8fde\u81f3VDD\uff0c\u5219\u9ed8\u8ba4\u4e3a[0x77]\u3002<\/span><\/i><\/p>\n

\u6211\u5c06SDO\u8fde\u63a5\u5230GND\uff0c\u56e0\u6b64\u663e\u793a0x76\uff0c\u4f46\u5982\u679c\u8fde\u81f3VDD\uff0c\u5219\u4f1a\u663e\u793a0x77\u3002<\/span><\/p>\n

\u6b64\u5916\uff0ci2Cdetect\u547d\u4ee4\u4e2d\u7684\u6700\u540e\u4e00\u4e2a\u53c2\u6570\u53d6\u51b3\u4e8eRaspberry Pi\u7684\u7248\u672c\u3002Revision 1\uff082012\u5e7410\u670814\u65e5\u4e4b\u524d\u53d1\u8d27\u7684Raspberry Pi Model B\uff09\u4f7f\u75280\uff0c\u800cRevision 2\u6307\u5b9a\u4f7f\u75281\u3002\u6211\u7528\u7684\u662fRaspberry Pi 2 Model B\uff0c\u56e0\u6b64\u53c2\u6570\u503c\u4e3a1\u3002<\/span><\/p>\n

\u6211\u8fd0\u884c\u7a0b\u5e8f\u65f6\u53d1\u751f\u4e86\u4ee5\u4e0b\u9519\u8bef\uff1a<\/span><\/p>\n

\"bme280\"<\/p>\n

\u53d1\u751f\u9519\u8bef\u540e\uff0c\u6211\u67e5\u770b\u4e86dev\u76ee\u5f55\uff0c\u770b\u5230\u6709\u4e00\u4e2a\u540d\u4e3a[i2c-1]\u800c\u4e0d\u662f[i2c-0]\u7684\u6587\u4ef6\u3002\u6211\u65e0\u6cd5\u6253\u5f00\u8fd9\u4e2a\u6587\u4ef6\uff0c\u4f46\u6211\u8ba4\u4e3a\u8be5\u6587\u4ef6\u5305\u542b\u8bb0\u5f55\u7684\u6d4b\u91cf\u503c\u3002<\/span><\/p>\n

sudo i2cdump -y 1 0x76<\/span><\/p>\n

\"bme280\"<\/p>\n

\u4e0a\u56fe\u662f\u6211\u7528i2Cdump\u547d\u4ee4\u8f93\u51fa\u5bc4\u5b58\u5668\u503c\u7684\u7ed3\u679c\u3002\u770b\u8d77\u6765\u8bbe\u5907\u8bfb\u53d6\u4e86\u5f88\u591a\u6570\u503c\uff0c\u4f46\u662f\u6211\u65e0\u6cd5\u5206\u8fa8\u54ea\u4e9b\u503c\u6765\u81ea\u54ea\u91cc\u4ee5\u53ca\u4e3a\u4ec0\u4e48\u662f\u8fd9\u6837\u5b50\u7684\u3002<\/span><\/p>\n

\u6211\u5f88\u96be\u5bf9\u8fd9\u4e9b\u503c\u8fdb\u884c\u8f6c\u6362\/\u8ba1\u7b97\uff0c\u6240\u4ee5\u6211\u4eceSwitch Science\u5e93\u4e2d\u501f\u7528\u4e86\u4e00\u4e9bPython\u6e90\u4ee3\u7801\uff1a<\/span><\/p>\n

SWITCHSCIENCE\/BME280<\/span><\/a><\/p>\n

\u5355\u51fb\u53f3\u4e0a\u89d2\u7684\u201cDownload ZIP\u201d\u94fe\u63a5\uff0c\u5c06Python27\u6587\u4ef6\u5939\u4e2d\u7684\u201cbme_280_sample.py\u201d\u6587\u4ef6\u653e\u5728Raspberry Pi\u7684\u76f8\u5e94\u4f4d\u7f6e\u3002\u6ce8\u610f\uff1a\u6b64\u7a0b\u5e8f\u9700\u8981\u201cpython-smbus\u201d\u8f6f\u4ef6\u5305\u624d\u80fd\u8fd0\u884c\u3002<\/span><\/p>\n

python \/home\/pi\/bme280_sample.py<\/span><\/p>\n

\u51c6\u5907\u5de5\u4f5c\u5b8c\u6210\u540e\uff0c\u8fd0\u884c\u7a0b\u5e8f\uff01\u6210\u529f\u8fd0\u884c\u4e4b\u540e\uff0c\u60a8\u4f1a\u770b\u5230\u4e09\u884c\u8f93\u51fa\uff1a\u6e29\u5ea6\u3001\u538b\u529b\u548c\u6e7f\u5ea6\u3002<\/span><\/p>\n

\"bme280\"<\/p>\n

\u6ce8\u610f\uff1a\u60a8\u5fc5\u987b\u5177\u6709root\u6743\u9650\u624d\u80fd\u8fd0\u884csmbus\u8f6f\u4ef6\u5305\u3002\u548c\u5f80\u5e38\u4e00\u6837\uff0c\u6211\u5c1d\u8bd5\u7528PHP\u8fd0\u884c\uff0c\u4f46\u662f\u51fa\u73b0\u9519\u8bef\uff0c\u6240\u4ee5\u6211\u653e\u5f03\u4e86\u3002<\/span>bme_280_sample.py <\/span><\/a>\u6e90\u4ee3\u7801\u4e2d\u6709\u5f88\u591a\u590d\u6742\u7684\u8ba1\u7b97\uff0c\u867d\u7136\u6211Python\u7ecf\u9a8c\u5f88\u5c11\uff0c\u4f46\u662f\u6211\u4ecd\u7136\u8bbe\u6cd5\u4fee\u6539\u4e86\u8f93\u51fa\u90e8\u5206\u3002\u6211\u7684\u90e8\u5206\u5b9a\u5236\u4ee3\u7801\u5982\u4e0b\uff1a<\/span><\/p>\n

\/home\/pi\/bme280_custom.py<\/span><\/p>\n

\n
#coding: utf-8\r\n\r\nimport smbus\r\nimport time\r\n\r\nbus_number  = 1\r\ni2c_address = 0x76\r\n\r\nbus = smbus.SMBus(bus_number)\r\n\r\ndigT = []\r\ndigP = []\r\ndigH = []\r\n\r\nt_fine = 0.0\r\n\r\ndef writeReg(reg_address, data):\r\n    bus.write_byte_data(i2c_address,reg_address,data)\r\n\r\ndef get_calib_param():\r\n    calib = []\r\n\r\n    for i in range (0x88,0x88+24):\r\n        calib.append(bus.read_byte_data(i2c_address,i))\r\n    calib.append(bus.read_byte_data(i2c_address,0xA1))\r\n    for i in range (0xE1,0xE1+7):\r\n        calib.append(bus.read_byte_data(i2c_address,i))\r\n\r\n    digT.append((calib[1] << 8) | calib[0])\r\n    digT.append((calib[3] << 8) | calib[2])\r\n    digT.append((calib[5] << 8) | calib[4])\r\n    digP.append((calib[7] << 8) | calib[6])\r\n    digP.append((calib[9] << 8) | calib[8])\r\n    digP.append((calib[11]<< 8) | calib[10])\r\n    digP.append((calib[13]<< 8) | calib[12])\r\n    digP.append((calib[15]<< 8) | calib[14])\r\n    digP.append((calib[17]<< 8) | calib[16])\r\n    digP.append((calib[19]<< 8) | calib[18])\r\n    digP.append((calib[21]<< 8) | calib[20])\r\n    digP.append((calib[23]<< 8) | calib[22])\r\n    digH.append( calib[24] )\r\n    digH.append((calib[26]<< 8) | calib[25])\r\n    digH.append( calib[27] )\r\n    digH.append((calib[28]<< 4) | (0x0F & calib[29]))\r\n    digH.append((calib[30]<< 4) | ((calib[29] >> 4) & 0x0F))\r\n    digH.append( calib[31] )\r\n\r\n    for i in range(1,2):\r\n        if digT[i] & 0x8000:\r\n            digT[i] = (-digT[i] ^ 0xFFFF) + 1\r\n\r\n    for i in range(1,8):\r\n        if digP[i] & 0x8000:\r\n            digP[i] = (-digP[i] ^ 0xFFFF) + 1\r\n\r\n    for i in range(0,6):\r\n        if digH[i] & 0x8000:\r\n            digH[i] = (-digH[i] ^ 0xFFFF) + 1 \r\n\r\ndef readData():\r\n    data = []\r\n    for i in range (0xF7, 0xF7+8):\r\n        data.append(bus.read_byte_data(i2c_address,i))\r\n    pres_raw = (data[0] << 12) | (data[1] << 4) | (data[2] >> 4)\r\n    temp_raw = (data[3] << 12) | (data[4] << 4) | (data[5] >> 4)\r\n    hum_raw  = (data[6] << 8)  |  data[7]\r\n\r\n    #compensate_T(temp_raw)\r\n    #compensate_P(pres_raw)\r\n    #compensate_H(hum_raw)\r\n    t = compensate_T(temp_raw)\r\n    p = compensate_P(pres_raw)\r\n    h = compensate_H(hum_raw)\r\n    return p + \",\" + t + \",\" + h\r\n\r\ndef compensate_P(adc_P):\r\n    global  t_fine\r\n    pressure = 0.0\r\n\r\n    v1 = (t_fine \/ 2.0) - 64000.0\r\n    v2 = (((v1 \/ 4.0) * (v1 \/ 4.0)) \/ 2048) * digP[5]\r\n    v2 = v2 + ((v1 * digP[4]) * 2.0)\r\n    v2 = (v2 \/ 4.0) + (digP[3] * 65536.0)\r\n    v1 = (((digP[2] * (((v1 \/ 4.0) * (v1 \/ 4.0)) \/ 8192)) \/ 8)  + ((digP[1] * v1) \/ 2.0)) \/ 262144\r\n    v1 = ((32768 + v1) * digP[0]) \/ 32768\r\n\r\n    if v1 == 0:\r\n        return 0\r\n    pressure = ((1048576 - adc_P) - (v2 \/ 4096)) * 3125\r\n    if pressure < 0x80000000:         pressure = (pressure * 2.0) \/ v1     else:         pressure = (pressure \/ v1) * 2     v1 = (digP[8] * (((pressure \/ 8.0) * (pressure \/ 8.0)) \/ 8192.0)) \/ 4096     v2 = ((pressure \/ 4.0) * digP[7]) \/ 8192.0     pressure = pressure + ((v1 + v2 + digP[6]) \/ 16.0)        #print \"pressure : %7.2f hPa\" % (pressure\/100)     return \"%7.2f\" % (pressure\/100)     def compensate_T(adc_T):     global t_fine     v1 = (adc_T \/ 16384.0 - digT[0] \/ 1024.0) * digT[1]     v2 = (adc_T \/ 131072.0 - digT[0] \/ 8192.0) * (adc_T \/ 131072.0 - digT[0] \/ 8192.0) * digT[2]     t_fine = v1 + v2     temperature = t_fine \/ 5120.0     #print \"temp : %-6.2f \u2103\" % (temperature)     return \"%.2f\" % (temperature)   def compensate_H(adc_H):     global t_fine     var_h = t_fine - 76800.0     if var_h != 0:         var_h = (adc_H - (digH[3] * 64.0 + digH[4]\/16384.0 * var_h)) * (digH[1] \/ 65536.0 * (1.0 + digH[5] \/ 67108864.0 * var_h * (1.0 + digH[2] \/ 67108864.0 * var_h)))     else:         return 0     var_h = var_h * (1.0 - digH[0] * var_h \/ 524288.0)     if var_h > 100.0:\r\n        var_h = 100.0\r\n    elif var_h < 0.0:\r\n        var_h = 0.0\r\n    #print \"hum : %6.2f \uff05\" % (var_h)\r\n    return \"%.2f\" % (var_h)\r\n\r\ndef setup():\r\n    osrs_t = 1            #Temperature oversampling x 1\r\n    osrs_p = 1            #Pressure oversampling x 1\r\n    osrs_h = 1            #Humidity oversampling x 1\r\n    mode   = 3            #Normal mode\r\n    t_sb   = 5            #Tstandby 1000ms\r\n    filter = 0            #Filter off\r\n    spi3w_en = 0            #3-wire SPI Disable\r\n\r\n    ctrl_meas_reg = (osrs_t << 5) | (osrs_p << 2) | mode\r\n    config_reg    = (t_sb << 5) | (filter << 2) | spi3w_en\r\n    ctrl_hum_reg  = osrs_h\r\n\r\n    writeReg(0xF2,ctrl_hum_reg)\r\n    writeReg(0xF4,ctrl_meas_reg)\r\n    writeReg(0xF5,config_reg)\r\n\r\nsetup()\r\nget_calib_param()\r\n\r\nif __name__ == '__main__':\r\n    try:\r\n        readData()\r\n    except KeyboardInterrupt:\r\n        pass\r\n<\/code><\/pre>\n<\/div>\n
 <\/p>\n
\u6211\u5e76\u6ca1\u6709\u4fee\u6539\u592a\u591a\u4ee3\u7801\uff0c\u53ea\u662f\u5bf9\u4e3b\u8981\u7684\u201c\u5904\u7406\u201d\u90e8\u5206\u8fdb\u884c\u4e86\u4e00\u4e9b\u5c0f\u7684\u8c03\u6574\u3002\u6211\u5c06\u201cprint\u201d\u6539\u4e3a\u201creturn\u201d\u5e76\u8fdb\u884c\u4e86\u76f8\u5173\u7f16\u8f91\uff0c\u4f7f\u5f97\u7a0b\u5e8f\u4ee5CSV\u683c\u5f0f\u8fd4\u56de\u6570\u503c\uff08\u5e26\u9017\u53f7\uff09\u3002<\/p>\n
\/home\/pi\/bme280.py<\/span><\/p>\n
\n
#coding: utf-8\r\n\r\n \r\n\r\nimport bme280_custom\r\n\r\nimport datetime\r\n\r\nimport os\r\n\r\n \r\n\r\ndir_path = '\/home\/pi\/bme280-data'\r\n\r\n \r\n\r\nnow = datetime.datetime.now()\r\n\r\nfilename = now.strftime('%Y%m%d')\r\n\r\nlabel = now.strftime('%H:%M')\r\n\r\ncsv = bme280_custom.readData()\r\n\r\n \r\n\r\nif not os.path.exists('\/home\/pi\/bme280-data'):\r\n\r\n    os.makedirs('\/home\/pi\/bme280-data')\r\n\r\nf = open('\/home\/pi\/bme280-data\/'+filename+'.csv','a')\r\n\r\nf.write(\"'\"+label+\"',\"+csv+\"\\n\")\r\n\r\nf.close()\r\n<\/code><\/pre>\n<\/div>\n
 <\/p>\n
\u6211\u521b\u5efa\u4e86\u53e6\u4e00\u4e2apy\uff0c\u4ece\u4e4b\u524d\u4fee\u6539\u8fc7\u7684\u201cbme280_custom.py\u201d\u4e2d\u8c03\u7528readData()\u51fd\u6570\u3002\u8fd9\u4f1a\u5c06\u8bfb\u53d6\u7684\u6570\u503c\u4fdd\u5b58\u5728CSV\u6587\u4ef6\u4e2d\u3002\u6587\u4ef6\u7684\u8bbe\u7f6e\u5982\u4e0b\uff1a\u8bb0\u5f55\u4e00\u6574\u5929\u7684\u6570\u636e\uff0c\u4ee5\u65e5\u671f\u4f5c\u4e3a\u6587\u4ef6\u540d\u4fdd\u5b58\u3002<\/span><\/p>\n
\u6211\u7528cron\u767b\u8bb0\u4e86\u8fd9\u4e2a\u7a0b\u5e8f\u5e76\u8fdb\u884c\u4e86\u8bbe\u7f6e\uff0c\u8ba9\u5b83\u5b9a\u671f\u8fd0\u884c\u3002\u73b0\u5728\u5b8c\u6210\u4e86\uff01<\/span>
\n<\/span>sudo crontab -e<\/span><\/p>\n
0-59\/10 * * * * \/home\/pi\/bme280.py<\/span><\/p>\n
\u6ce8\uff1a\u6211\u5c06\u5176\u8bbe\u7f6e\u4e3a\u6bcf10\u5206\u949f\u8fd0\u884c\u4e00\u6b21\u3002<\/span><\/p>\n
\u63a5\u4e0b\u6765\uff0c\u6211\u5c06\u521b\u5efa\u4e00\u4e2aPHP\u6587\u4ef6\u6765\u663e\u793a\u6570\u636e\u3002\u6211\u7528<\/span> DS18B20 \u6e29\u5ea6\u4f20\u611f\u5668<\/span><\/a>\u5236\u4f5c\u6e29\u5ea6\u8ba1\u65f6\u505a\u8fc7\u7c7b\u4f3c\u4e8b\u60c5\u3002<\/span><\/p>\n

\n<\/span>\/var\/www\/html\/bme280.php<\/span><\/p>\n
 <\/p>\n
\n
<?php\r\n\r\n$today  = date(\"Ymd\");\r\n\r\n$csv_dir  = '\/home\/pi\/bme280-data\/';\r\n\r\n$csv_file = $today.'.csv';\r\n\r\n$grapgh   = '';\r\n\r\nif (($handle = fopen($csv_dir.$csv_file, \"r\")) !== false) {\r\n\r\n    while (($line = fgets($handle)) !== false) {\r\n\r\n    $grapgh .= '['.rtrim($line).'],'.PHP_EOL;\r\n\r\n    }\r\n\r\n    fclose($handle);\r\n\r\n}else{\r\n\r\n    echo 'no data';\r\n\r\n}\r\n\r\n?>\r\n\r\n<html>\r\n\r\n<head>\r\n\r\n<script type=\"text\/javascript\" src=\"https:\/\/www.google.com\/jsapi\"><\/script>\r\n\r\n<script type=\"text\/javascript\">\r\n\r\n    google.load(\"visualization\", \"1\", {packages:[\"table\"]});\r\n\r\n    google.setOnLoadCallback(drawTable);\r\n\r\n \r\n\r\n    function drawTable() {\r\n\r\n    var data = new google.visualization.DataTable();\r\n\r\n    data.addColumn('string', 'Time');\r\n\r\n    data.addColumn('number', 'Pressure');\r\n\r\n    data.addColumn('number', 'Temperature');\r\n\r\n    data.addColumn('number', 'Humidity');\r\n\r\n    data.addRows([\r\n\r\n \r\n\r\n<?php echo $grapgh; ?>\r\n\r\n \r\n\r\n    ]);\r\n\r\n \r\n\r\n      var table = new google.visualization.Table(document.getElementById('table_div'));\r\n\r\n      table.draw(data, {showRowNumber: true});\r\n\r\n    }\r\n\r\n<\/script>\r\n\r\n<\/head>\r\n\r\n<body>\r\n\r\n \r\n\r\n<div id=\"table_div\"><\/div>\r\n\r\n \r\n\r\n<\/body>\r\n\r\n<\/html>\r\n<\/code><\/pre>\n<\/div>\n
 <\/p>\n
\u6211\u521b\u5efa\u4e86\u4e00\u4e2a\u7b80\u5355\u7684PHP\u6587\u4ef6\uff0c\u5728\u8868\u4e2d\u663e\u793a\u76f8\u5173\u6570\u636e\uff08\u60a8\u5fc5\u987b\u5b89\u88c5\u201cphp5\u201d\u8f6f\u4ef6\u5305\u624d\u80fd\u4f7f\u7528PHP\uff09\u3002<\/p>\n
\"bme280\"<\/p>\n
\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u6211\u53ef\u4ee5\u7528\u6d4f\u89c8\u5668\u2014\u2014\u5bfc\u822a\u81f3 <\/span>https:\/\/localhost\/bme280.php<\/span> \u2014\u2014\u67e5\u770bCSV\u6587\u4ef6\u7684\u5185\u5bb9\u3002\u5373\u4f7f\u6bcf\u969410\u5206\u949f\uff0c\u538b\u529b\u4e5f\u4f1a\u53d1\u751f\u5de8\u5927\u53d8\u5316\uff01<\/span><\/p>\n
Raspbian\u6700\u65b0\u7248\u672c\u9884\u88c5\u4e86\u4e00\u4e2a\u540d\u4e3a\u201c<\/span>LibreOffice<\/span><\/a>\u201d\u7684\u529e\u516c\u5957\u4ef6\u3002\u5982\u679c\u60a8\u53ea\u662f\u60f3\u67e5\u770b\u6570\u636e\uff0c\u90a3\u4e48\u53ef\u4ee5\u4f7f\u7528\u201cLibreOffice Calc\u201d\uff08\u53cc\u51fbCSV\u6587\u4ef6\uff09\uff0c\u7136\u540e\u60a8\u4f1a\u770b\u5230\u5982\u4e0b\u5185\u5bb9\uff1a<\/span><\/p>\n
\u603b\u7ed3<\/b><\/p>\n
\u4eca\u5929\uff0c\u6211\u4eec\u7528AE-BME280\u4f20\u611f\u5668\u6784\u5efa\u4e86\u4e00\u4e2a\u7b80\u5355\u6a21\u5757\u6765\u6d4b\u91cf\u591a\u4e2a\u6570\u503c\uff08\u538b\u529b\u3001\u6e7f\u5ea6\u548c\u6e29\u5ea6\uff09\u3002\u8fd9\u4e48\u5c0f\u7684\u4f20\u611f\u5668\u53ef\u4ee5\u6d4b\u91cf\u591a\u8fbe\u4e09\u4e2a\u4e0d\u540c\u7684\u53c2\u6570\uff0c\u771f\u662f\u592a\u795e\u5947\u4e86\u3002\u4f20\u611f\u5668\u975e\u5e38\u5fae\u5c0f\uff0c\u4f46\u975e\u5e38\u5f3a\u5927\uff01<\/span><\/p>\n
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