{"id":16516614,"url":"https://github.com/eadf/esp_mqtt_2004lcd","last_synced_at":"2026-06-05T18:31:56.527Z","repository":{"id":26692008,"uuid":"30148916","full_name":"eadf/esp_mqtt_2004lcd","owner":"eadf","description":"Display mqtt messages on a 20x4 LCD","archived":false,"fork":false,"pushed_at":"2015-02-28T18:21:13.000Z","size":1604,"stargazers_count":1,"open_issues_count":0,"forks_count":0,"subscribers_count":3,"default_branch":"master","last_synced_at":"2025-03-02T18:19:32.015Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":"","language":"C","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"gpl-3.0","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/eadf.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null}},"created_at":"2015-02-01T14:47:34.000Z","updated_at":"2021-08-28T17:05:30.000Z","dependencies_parsed_at":"2022-07-27T08:52:14.718Z","dependency_job_id":null,"html_url":"https://github.com/eadf/esp_mqtt_2004lcd","commit_stats":null,"previous_names":[],"tags_count":2,"template":false,"template_full_name":null,"purl":"pkg:github/eadf/esp_mqtt_2004lcd","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/eadf%2Fesp_mqtt_2004lcd","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/eadf%2Fesp_mqtt_2004lcd/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/eadf%2Fesp_mqtt_2004lcd/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/eadf%2Fesp_mqtt_2004lcd/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/eadf","download_url":"https://codeload.github.com/eadf/esp_mqtt_2004lcd/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/eadf%2Fesp_mqtt_2004lcd/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":33953685,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-05-26T15:22:16.424Z","status":"online","status_checked_at":"2026-06-05T02:00:06.157Z","response_time":120,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":true,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2024-10-11T16:25:46.356Z","updated_at":"2026-06-05T18:31:56.496Z","avatar_url":"https://github.com/eadf.png","language":"C","funding_links":[],"categories":[],"sub_categories":[],"readme":"# esp_mqtt_2004lcd\n\nDisplay mqtt messages on a 20x4 LCD.\n\nI'm pulling in two git subtree projects : [tuanpmt's exellent mqtt project: esp_mqtt](https://github.com/tuanpmt/esp_mqtt) and my lcd project [  esp8266_digoleserial](https://github.com/eadf/esp8266_digoleserial) to build this project.\n\nTo use the LCD you will need an esp with GPIO2 available. Digoleserial uses UART1 so the GPIO2 pin is hardwired.\n\n##Usage\nTo use this mqtt enabled LCD you can send text messages to these topics:\n* /lcd0\n* /lcd1\n* /lcd2\n* /lcd3\n\nRepresenting each row of the display.\n\nYou can also send messages to a topic that is unique to each esp, look at the debug console for more info.\n\nThe makefile is copied from [esp_mqtt.](https://github.com/tuanpmt/esp_mqtt)\n\n###Building and installing:\n\nFirst you need to install the sdk and the easy way of doing that is to use [esp_open_sdk.](https://github.com/pfalcon/esp-open-sdk)\n\nYou can put that anywhere you like (/opt/local/esp-open-sdk, /esptools etc etc)\n\nThen you could create a small ```setenv.sh``` file, containing the location of your newly compiled sdk and other platform specific info;\n```\nexport SDK_BASE=/opt/local/esp-open-sdk/sdk\nexport PATH=${SDK_BASE}/../xtensa-lx106-elf/bin:${PATH}\nexport ESPPORT=/dev/ttyO0  \n```\n(or setup your IDE to do the same)\n\nYou will have to edit the ```include/user_config.h``` file to suit your WiFi and mqtt settings. Alternatively you can copy ```include/user_config.h``` into ```localinclude/user_config.h``` and git will not bother you about modified files.\n\nTo make a clean build, flash and connect to the esp console you just do this in a shell:\n```\nsource setenv.sh # This is only needed once per session\nmake clean \u0026\u0026 make test\n```\n\nYou won't be needing esptool, the makefile only uses esptool.py (provided by [esp_open_sdk](https://github.com/pfalcon/esp-open-sdk))\n\nI have tested this with sdk v0.9.5 and v0.9.4 (linux \u0026 mac)\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Feadf%2Fesp_mqtt_2004lcd","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Feadf%2Fesp_mqtt_2004lcd","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Feadf%2Fesp_mqtt_2004lcd/lists"}