ESP8266 Multi Sensor BME280 (battery powerd) - T, Humidity and hPa, incl. Code

prusaprinters

<p>I started my Home Assistant instalation a few day ago and now added these sensors to it (will make a window reed contact next on the same base).</p> <p>The ESP ist running on the ESPhome software (you can find a good guide in how to wire up the esp12 here - <a href="http://domoticx.com/esp8266-wifi-esp-12-module-aansluiten/">http://domoticx.com/esp8266-wifi-esp-12-module-aansluiten/</a>). For the deep sleep mode you need to connect the GPIO16 pin to reset. Otherwise the ESP will not wake up.</p> <p>I'm using the following code in ESPhome - for the first test you can delete the deep sleep lines at the end.</p> <p>With one meassurement every 10min. it should run for at least 6 month on two AA Eneloops. The ESP cunsumes ~70mA when active and 0,017mA when in deep sleep.</p> <p>Right now I'm waiting for the 5mm nickel stripes for proper battery contacts.</p> <p>esphomeyaml:</p> <p>name: bme280</p> <p>platform: ESP8266</p> <p>board: esp12e</p> <p>wifi:</p> <p>ssid: 'XXXXXXXXXXXXXXX'</p> <p>password: 'XXXXXXXXXXXXXXX'</p> <p>manual_ip:</p> <p>static_ip: 192.168.0.23</p> <p>gateway: 192.168.0.1</p> <p>subnet: 255.255.255.0 logger:</p> <p>api:</p> <p>ota:</p> <p>i2c:</p> <p>sda: 4</p> <p>scl: 5</p> <p>scan: False</p> <p>sensor:</p> <ul> <li>platform: bme280</li> </ul> <p>temperature:</p> <p>name: "BME280 Temperature"</p> <p>id: bme280_temperature</p> <p>pressure:</p> <p>name: "BME280 Pressure"</p> <p>id: bme280_pressure</p> <p>humidity:</p> <p>name: "BME280 Realtive Humidity"</p> <p>id: bme280_humidity</p> <p>address: 0x76</p> <p>iir_filter: 16x</p> <p>update_interval: 1s</p> <ul> <li>platform: template</li> </ul> <p>name: "Altitude"</p> <p>lambda: |-</p> <p>const float STANDARD_SEA_LEVEL_PRESSURE = 1013.25; //in hPa, see note</p> <p>return ((id(bme280_temperature).state + 273.15) / 0.0065)* (powf((STANDARD_SEA_LEVEL_PRESSURE / id(bme280_pressure).state), 0.190234) - 1); // in meter</p> <p>update_interval: 1s</p> <ul> <li>platform: template</li> </ul> <p>name: "Absolute Humidity"</p> <p>lambda: |-</p> <p>const float mw = 18.01534; // molar mass of water g/mol</p> <p>const float r = 8.31447215; // Universal gas constant J/mol/K</p> <p>return (6.112<em>powf(2.718281828, (17.67</em> id(bme280_temperature).state) / (id(bme280_temperature).state + 243.5))<em>id(bme280_humidity).state</em> mw) / ((273.15 + id(bme280_temperature).state)* r); // in grams/m^3</p> <p>update_interval: 1s</p> <ul> <li>platform: adc</li> </ul> <p>pin: VCC</p> <p>name: "ESP voltage"</p> <p>update_interval: 1s</p> <p>deep_sleep:</p> <p>run_duration: 3s</p> <p>sleep_duration: 600s</p> Category: Household