{"id":7,"date":"2025-06-01T23:17:53","date_gmt":"2025-06-01T21:17:53","guid":{"rendered":"https:\/\/blog.bratfisch.net\/?p=7"},"modified":"2025-07-07T22:55:40","modified_gmt":"2025-07-07T20:55:40","slug":"a-beelogger-on-esp32-basis-part-2-basic-sensors","status":"publish","type":"post","link":"https:\/\/blog.bratfisch.net\/index.php\/2025\/06\/01\/a-beelogger-on-esp32-basis-part-2-basic-sensors\/","title":{"rendered":"A beelogger on ESP32 basis, part 2: Test setup: The basic sensors"},"content":{"rendered":"\n

I’m still unsure which sensors to use in production, so I started experimenting:<\/p>\n\n\n\n

I connected a bmp085, a waterproof bh1750, a Si7021 and a bme280 via I2C. Two DS18B20s that will be built in in the lid of the hive and into its center are connected via 1-wire.<\/p>\n\n\n\n

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BH1750<\/figcaption><\/figure>\n\n\n\n
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BH1750<\/figcaption><\/figure>\n\n\n\n
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BMP085<\/strong><\/figcaption><\/figure>\n\n\n\n
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DS18B20<\/figcaption><\/figure>\n<\/figure>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n


<\/p>\n\n\n\n


In my test-setup, I connected it like this:
<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n


<\/p>\n\n\n\n

The code I used for the sensors:
<\/p>\n\n\n\n

substitutions:\n  update_interval: 5s\n  \ni2c:\n  sda: GPIO35\n  scl: GPIO36\n  scan: true\n\none_wire:\n  - platform: gpio\n    pin: GPIO04\n\nsensor:\n  - platform: htu21d\n    model: SI7021\n    temperature:\n      name: \"SI7021 Temperature\"\n    humidity:\n      name: \"SI7021 Humidity\"\n    heater:\n      name: \"SI7021 Heater\"\n    address: 0x40\n    update_interval: ${update_interval}\n  - platform: bmp085\n    temperature:\n      name: \"BMP085 Temperature\"\n    pressure:\n      name: \"BMP085 Pressure\"\n    address: 0x77\n    update_interval: ${update_interval}\n  - platform: bme280_i2c\n    temperature:\n      name: \"BME280 Temperature\"\n    pressure:\n      name: \"BME280 Pressure\"\n    humidity:\n      name: \"BME280 Humidity\"\n    address: 0x76\n    update_interval: ${update_interval}\n  - platform: dallas_temp\n    name: \"DS18B20 Temperature 1\"\n    address: 0xcb000000513fb228\n    update_interval: ${update_interval}\n  - platform: dallas_temp\n    name: \"DS18B20 Temperature 2\"\n    address: 0x6f000000bcc72128\n    update_interval: ${update_interval}\n  - platform: bh1750\n    name: \"BH1750 Illuminance\"\n    address: 0x23\n    update_interval: ${update_interval}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
I’m still unsure which sensors to use in production, so I started experimenting: I connected a bmp085, a waterproof bh1750, a Si7021 and a bme280 via I2C. Two DS18B20s that will be built in in the lid of the hive and into its center are connected via 1-wire. In my test-setup, I connected it like […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[3,4,5],"class_list":["post-7","post","type-post","status-publish","format-standard","hentry","category-allgemein","tag-beelogger","tag-esp32","tag-esphome"],"_links":{"self":[{"href":"https:\/\/blog.bratfisch.net\/index.php\/wp-json\/wp\/v2\/posts\/7","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.bratfisch.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.bratfisch.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.bratfisch.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.bratfisch.net\/index.php\/wp-json\/wp\/v2\/comments?post=7"}],"version-history":[{"count":48,"href":"https:\/\/blog.bratfisch.net\/index.php\/wp-json\/wp\/v2\/posts\/7\/revisions"}],"predecessor-version":[{"id":906,"href":"https:\/\/blog.bratfisch.net\/index.php\/wp-json\/wp\/v2\/posts\/7\/revisions\/906"}],"wp:attachment":[{"href":"https:\/\/blog.bratfisch.net\/index.php\/wp-json\/wp\/v2\/media?parent=7"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.bratfisch.net\/index.php\/wp-json\/wp\/v2\/categories?post=7"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.bratfisch.net\/index.php\/wp-json\/wp\/v2\/tags?post=7"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}