{"rewrite":{"id":"r_7fb2909e81c53212b1c29a93","clusterId":"c_885caace0013585329b74449","slug":"weathergotchi-logger-skips-smartphone-app-with-on-device-e-paper-display","model":"deepseek-v4-flash","headline":"Weathergotchi Logger Skips Smartphone App With On-Device E-Paper Display","summary":"Hardware and software engineer Michael Manning built a portable data logger called Weathergotchi that records temperature and humidity and displays the data on a 1.54-inch e-paper screen. No smartphone app is needed; the device shows a graph of past temperature changes. Manning released the circuit diagrams, firmware, and 3D-printable case files as open source on GitHub.","whyItMatters":"Weathergotchi solves a common camping frustration-checking overnight temperature trends without creating a phone account or installing a dedicated app-by putting the data directly on the device screen.","webCardHtml":"\u003cp\u003eManning designed Weathergotchi after a cold camping trip left him wondering how low the temperature actually dropped and whether his sleeping bag was adequate. Commercial data loggers he found required a smartphone app, account creation, and extra clutter. The 3 cm × 4 cm board uses an Espressif ESP32-S3 Mini, a Sensirion SHT45 sensor, a DS3231 real-time clock, and a 24LC512 EEPROM. The ESP32-S3 spends most of its time in deep sleep, waking once per minute to take a reading, then returning to sleep. A small lithium-polymer battery is estimated to last over a week. The parametric OpenSCAD case is adjustable through 40 variables. The current version does not export data via Wi-Fi or Bluetooth, and the e-paper display may not update below freezing, but recording continues normally. Manning says the device has run stably on hikes.\u003c/p\u003e","blueskyPost":"Hardware engineer Michael Manning built Weathergotchi, a portable temp/humidity logger that shows data on an e-paper display. No phone app needed. Open source hardware and firmware on GitHub.","twitterPost":"Hardware engineer Michael Manning built Weathergotchi, a portable temp/humidity logger that shows data on an e-paper display. No phone app needed. Open source hardware and firmware on GitHub.","threadsPost":null,"newsletterBlurb":"Michael Manning created Weathergotchi, a self-contained temperature and humidity logger that displays its data on a 1.54-inch e-paper screen. No smartphone app is required, and all design files are open-source. The device is built around an ESP32-S3 and a Sensirion SHT45 sensor, with a parametric case that can be 3D printed.","attributionJson":"[{\"source\":\"GIGAZINE\",\"url\":\"https://gigazine.net/news/20260717-weathergotchi/\",\"title\":\"スマホアプリ不要で気温と湿度の変化をその場で確認できる電子ペーパー式データロガー「Weathergotchi」をエンジニアが自作\"}]","lintFlagsJson":null,"lintHits":0,"costUsd":0,"inputTokens":4916,"outputTokens":1176,"status":"published","repairAttempts":0,"nextRepairAt":null,"factsAttemptedAt":1784245665,"createdAt":"2026-07-16T23:37:30.000Z","publishedAt":"2026-07-16T23:42:28.000Z","updatedAt":"2026-07-16T23:37:30.000Z"},"cluster":{"id":"c_885caace0013585329b74449","canonicalTitle":"スマホアプリ不要で気温と湿度の変化をその場で確認できる電子ペーパー式データロガー「Weathergotchi」をエンジニアが自作","representativeArticleId":"a_e2acbe7a0ae44276a5fd040f","sourceCount":1,"writtenSourceCount":1,"writeAttempts":0,"isSolo":true,"entitiesJson":"{\"anime_titles\":[],\"manga_titles\":[],\"work_titles\":[],\"studios\":[],\"people\":[\"Michael Manning\"],\"type\":\"news\",\"domain\":\"other\",\"is_roundup\":false}","contentType":"news","status":"published","firstSeenAt":"2026-07-16T23:00:00.000Z","lastSeenAt":"2026-07-16T23:00:00.000Z","updatedAt":"2026-07-16T23:42:28.000Z"},"attribution":[{"source":"GIGAZINE","url":"https://gigazine.net/news/20260717-weathergotchi/","title":"スマホアプリ不要で気温と湿度の変化をその場で確認できる電子ペーパー式データロガー「Weathergotchi」をエンジニアが自作"}],"entities":{"anime_titles":[],"manga_titles":[],"work_titles":[],"studios":[],"people":["Michael Manning"],"type":"news","domain":"other","is_roundup":false},"keyFacts":null}