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ESPHome -- Scroll LCD Display Lines
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| substitutions: | |
| lcd_width: '16' | |
| lcd_height: '2' | |
| scroll_speed: 1s | |
| line_1: 'Long line that we want to scroll' | |
| line_2: 'Another long line that does not fit on the screen' | |
| display: | |
| - platform: lcd_gpio | |
| dimensions: ${lcd_width}x${lcd_height} | |
| data_pins: | |
| - D0 | |
| - D1 | |
| - D2 | |
| - D3 | |
| enable_pin: D6 | |
| rs_pin: D5 | |
| id: lcd | |
| update_interval: $scroll_speed | |
| lambda: |- | |
| static int p1 = 0; | |
| static int p2 = 0; | |
| // These lines could instead come from something like a text sensor. | |
| char* line1 = "$line_1"; | |
| int length1 = strlen(line1); | |
| if (length1 > $lcd_width) length1 = $lcd_width; | |
| const char* line2 = "$line_2"; | |
| int length2 = strlen(line2); | |
| if (length2 > $lcd_width) length2 = $lcd_width; | |
| int spacesLength = length1 >= $lcd_width ? 0 : $lcd_width - length1 + 1; | |
| char spaces[spacesLength]; | |
| for (int i = 0; i < spacesLength - 1; i++) spaces[i] = ' '; | |
| spaces[spacesLength - 1] = '\0'; | |
| it.printf("%.*s%s%.*s", length1, line1 + p1, spaces, length2, line2 + p2); | |
| p1++; | |
| if(p1 > (int)strlen(line1) - $lcd_width) { | |
| p1 = 0; | |
| } | |
| p2++; | |
| if(p2 > (int)strlen(line2) - $lcd_width) { | |
| p2 = 0; | |
| } | |
Hey @steveisaguy, here is my whole configuration where I use the scrolling LCD. I haven't used this device in a while, so there's a chance it will no longer work after some of the new ESPHome updates. Good luck with it!
substitutions: lcd_width: '16' lcd_height: '2' scroll_speed: 1s esphome: name: meeting-status-board platform: ESP8266 board: nodemcuv2 # Enable logging logger: level: DEBUG # Enable Home Assistant API api: ota: password: !secret ota_password wifi: ssid: !secret wifi_ssid password: !secret wifi_password # Enable fallback hotspot (captive portal) in case wifi connection fails ap: ssid: "Meeting-Status-Board" password: !secret ap_password captive_portal: text_sensor: - platform: homeassistant id: meeting_title entity_id: calendar.work attribute: message name: "Meeting Title" disabled_by_default: true - platform: homeassistant id: meeting_start entity_id: calendar.work attribute: start_time name: "Meeting Start Time" disabled_by_default: true - platform: homeassistant id: meeting_end entity_id: calendar.work attribute: end_time name: "Meeting End Time" disabled_by_default: true - platform: template name: "Current Light" lambda: |- if (id(in_meeting).state) { return {"red"}; } else if (id(meeting_started).state) { return {"yellow"}; } else { return {"green"}; } update_interval: 5s id: current_light disabled_by_default: true on_value: then: - switch.turn_off: green_light - switch.turn_off: yellow_light - switch.turn_off: red_light - if: condition: binary_sensor.is_on: in_meeting then: - switch.turn_on: red_light else: - if: condition: binary_sensor.is_on: meeting_started then: - switch.turn_on: yellow_light else: - switch.turn_on: green_light binary_sensor: - platform: homeassistant id: meeting_started entity_id: calendar.work name: "Meeting Started" disabled_by_default: true - platform: homeassistant id: in_meeting entity_id: binary_sensor.in_meeting name: "In Meeting" disabled_by_default: true switch: - platform: gpio pin: D7 name: "Green Light" internal: true id: green_light - platform: gpio pin: D8 name: "Yellow Light" internal: true id: yellow_light - platform: gpio pin: 9 name: "Red Light" internal: true id: red_light display: - platform: lcd_gpio dimensions: ${lcd_width}x${lcd_height} data_pins: - D0 - D1 - D2 - D3 enable_pin: D6 rs_pin: D5 id: lcd update_interval: $scroll_speed lambda: |- static int p1 = 0; static int p2 = 0; char line1[$lcd_width]; char startString[$lcd_width/2]; char endString[$lcd_width/2]; struct tm start; memset(&start, 0, sizeof(tm)); struct tm end; memset(&end, 0, sizeof(tm)); strptime(id(meeting_start).state.c_str(), "%Y-%m-%d %H:%M:%S", &start); strftime(startString, sizeof(startString), "%I:%M", &start); strptime(id(meeting_end).state.c_str(), "%Y-%m-%d %H:%M:%S", &end); strftime(endString, sizeof(endString), "%I:%M", &end); sprintf(line1, "%s - %s", startString, endString); int length1 = strlen(line1); const char* line2 = id(meeting_title).state.c_str(); int length2 = strlen(line2); if (length2 > $lcd_width) length2 = $lcd_width; int spacesLength = length1 >= $lcd_width ? 0 : $lcd_width - length1 + 1; char spaces[spacesLength]; for (int i = 0; i < spacesLength - 1; i++) spaces[i] = ' '; spaces[spacesLength - 1] = '\0'; it.printf("%.*s%s%.*s", length1, line1 + p1, spaces, length2, line2 + p2); p1++; if(p1 > (int)strlen(line1) - $lcd_width) { p1 = 0; } p2++; if(p2 > (int)strlen(line2) - $lcd_width) { p2 = 0; }
This looks like a cool project, do you have a photo on how the project looks. Seems you used it for a meeting room display
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Hey @steveisaguy, here is my whole configuration where I use the scrolling LCD. I haven't used this device in a while, so there's a chance it will no longer work after some of the new ESPHome updates. Good luck with it!