サーマルプリンタとRaspberry Piでカンバンを改善した話

by Yuya Kato

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αʔϚϧϓϦϯλͱRaspberry PiͰ ΧϯόϯΛվળͨ͠࿩ !1 2019೥2݄22೔(ۚ) IoT LT Osaka Vol.10 (ג)ಹ༝ଟ԰ Ճ౻༐໵

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໨࣍ • ࣗݾ঺հ / ࠷ۙͷ੍࡞෺ • ԿΛ࡞͔ͬͨʁ • Ͳ͏΍ͬͯ࡞͔ͬͨʁ • ·ͱΊ !2

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ࣗݾ঺հ: Ճ౻ ༐໵ • ιϑτ΢ΣΞΤϯδχΞʢ2000೥ʙʣ • גࣜձࣾಹ༝ଟ԰ ୅දऔక໾ʢ2007೥ʙʣ ͳ Ώ ͨ ΍ • झຯ: • ΋ͷͮ͘Γશൠ • 3DϓϦϯλʢ2013೥ʙʣ • ϘϧμϦϯάʢ2011೥ʙʣ !3 yuyakato1984 nayutaya

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τΠϨͷ࢖༻ঢ়گΛ཭Εͨ৔ॴʹදࣔ !4 ࠷ۙͷ੍࡞෺: τΠϨηϯα

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࠷ۙͷ੍࡞෺: ϕουܕମॏܭ 4x4=16ݸͷϩʔυηϧΛ࢖༻ ΩϟϦϒϨʔγϣϯ্͕ख͘ߦ͑ͣ಴࠳த !5

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ԿΛ࡞͔ͬͨʁ !6 ຊ୊ʹ໭ͬͯ

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αʔϚϧϓϦϯλͱRaspberry PiͰ ΧϯόϯΛվળͨ͠࿩ !7

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αʔϚϧϓϦϯλͱ͸ʁ • ײ೤ࢴʹҹ࡮͢ΔϓϦϯλ • ʮϨγʔτϓϦϯλʯʮײ೤ࢴϓϦϯλʯ  ͱ΋ݺ͹ΕΔ • ͍҆: ײ೤ࢴ͕҆ՁͰϥϯχϯάίετ͕͍҆ • ଎͍: ҹ࡮଎౓͕300mm/s΄Ͳͱ଎͍ • ্ख͍: ׆ࣈΛҹ࡮Ͱ͖ΔͷͰ៉ྷͳจࣈ !8

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Raspberry Piͱ͸ʁ • ݴΘͣͱ஌Εͨ  ҆ՁͳγϯάϧϘʔυίϯϐϡʔλ • Raspberry Pi 3 Model B+͸$35 !9

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Χϯόϯͱ͸ʁ • εΫϥϜͳͲͷ  ։ൃख๏Ͱ༻͍ΒΕΔ • λεΫͷঢ়گΛ  ՄࢹԽ͢Δπʔϧ • TodoɺDoingɺDone  ͳͲͷϨʔϯ • ෇ᝦͳͲͰλεΫΛදݱ Wikipediaʮ͔Μ͹Μ (ιϑτ΢ΣΞ։ൃ)ʯΑΓ !10

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෺ཧతͳΧϯόϯͷਏ͍ͱ͜Ζ !11 ࢖͏ͷ͸͍͍ͩͨ ʮ෇ᝦʯͱʮϖϯʯ ࣈΛॻ͘ͷ͕  ਏ͍ɾۤख ࣈ͕Ԛ͗ͯ͢  ࡉ͔͗ͯ͢ ಡΊͳ͍

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ͳͷͰ࡞Γ·ͨ͠ !12

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࡞ͬͨ΋ͷ: λεΫҹ࡮γεςϜ !13 GitHubͳͲͷλεΫΛ I s s u e Webϒϥ΢β͔Β αʔϚϧϓϦϯλ  Λ࢖ͬͯ ૉૣ͘؆୯ʹ ҹ࡮

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Χϯόϯ: αʔϚϧϓϦϯλಋೖલ • ਓʹΑͬͯҟͳΔॻ͖ํ • ಡΊͳ͍෇ᝦ • ॻ͘ͷ͕໘౗ͰషΒΕͳ͍෇ᝦ λ ε Ϋ !14

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Χϯόϯ: αʔϚϧϓϦϯλಋೖޙ • ॻ͔ͳͯ͘ྑ͍ʂ • ಡΈ΍͍͢ʂ • IssueԽ͞Ε͍ͯͳ͍  ෇ᝦ͕໨ཱͭʂ λ ε Ϋ !15

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Χϯόϯ: ϏϑΥʔΞϑλʔ !16 αʔϚϧϓϦϯλಋೖલ αʔϚϧϓϦϯλಋೖޙ

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Ͳ͏΍ͬͯ࡞͔ͬͨʁ !17

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ϋʔυ΢ΣΞ !18 αʔϚϧϓϦϯλ ໿11,000ԁ https://amzn.to/2XdO0O9 Raspberry Pi 3B+ίϯϓΩοτ ໿9,500ԁ https://amzn.to/2Nhv8Jw ϩʔϧࢴ ໿280ԁʢ1רʣ https://amzn.to/2txyyif USB ·ͨ͸ Ethernet ී௨ͷLinuxϚγϯͰ୅ସՄೳ ESC/POSରԠػͳΒͨͿΜԿͰ΋OK 80mm෯ͳΒͨͿΜԿͰ΋OK

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ιϑτ΢ΣΞ • 4ͭͷιϑτ΢ΣΞͰߏ੒ • ҹ࡮αʔϏε • ϨϯμϦϯάαʔϏε • WebΞϓϦ • Google Chrome ֦ு !19 Raspberry PiͷDockerίϯςφ্Ͱಈ࡞ Google ChromeʢWebϒϥ΢βʣ্Ͱಈ࡞

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ιϑτ΢ΣΞ: ҹ࡮αʔϏε !20 HTTP POST USB curl --request POST \ --header "Content-Type: image/png" \  --data-binary @hello.png http://localhost:3030/print ҹ࡮αʔϏε PNGը૾Λૹ৴͢Δͱ ϓϦϯλ͔Βҹ࡮͞ΕΔ

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ιϑτ΢ΣΞ: ϨϯμϦϯάαʔϏε !21 ϨϯμϦϯάαʔϏε HTTP POST curl --request POST \ --header "Content-Type: application/json" \ --data-binary @hello.json \ http://localhost:3031/render_html > hello.png HTMLΛؚΉJSONΛ ೖྗ͢Δͱ ϨϯμϦϯά͞Εͨ ը૾͕ग़ྗ͞ΕΔ HTTP Response

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ιϑτ΢ΣΞ: WebΞϓϦ !22 ϨϯμϦϯά αʔϏε ҹ࡮ αʔϏε HTMLΛWebϒϥ΢βͰೖྗ͢Δͱ αʔϚϧϓϦϯλ ͔Βҹ࡮͞ΕΔ

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ιϑτ΢ΣΞ: Chrome֦ு !23 ϨϯμϦϯά αʔϏε ҹ࡮ αʔϏε αʔϚϧϓϦϯλ ͔Βҹ࡮͞ΕΔ λεΫͷϖʔδΛ։͍ͯϙνͬͱ͢Δͱ

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Ԡ༻ྫ • طʹ΍͍ͬͯΔ͜ͱ: • ன৯ϝϯόʔͷҹ࡮ • ͪΐͬͱͨ͠ϝϞͷҹ࡮ • ΍ͬͯΈ͍ͨ͜ͱ: • ΞΠσΞग़͠ / ϒϨΠϯετʔϛϯά • όʔϯμ΢ϯνϟʔτͷҹ࡮ !24

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·ͱΊ • αʔϚϧϓϦϯλ͸ʮ͍҆ʯʮ଎͍ʯʮ্ख͍ʯ • Χϯόϯ͕ΑΓ্ख͘ճΔΑ͏ʹͳͬͨɻ • Ԡ༻࣍ୈͰ͍Ζ͍ΖͰ͖Δ !25

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ࢀߟ • QiitaهࣄʰαʔϚϧϓϦϯλͰҹ࡮͢Δ: ໨࣍ʱ  https://qiita.com/yuyakato/items/288962fbc39446644668 • GitHubϦϙδτϦ: nayutaya/thermal-printer  https://github.com/nayutaya/thermal-printer !26

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!27 ൃද͸Ҏ্Ͱ͢