Membaca tampilan jam di ruangan dari beberapa meter memerlukan layar LED matrix seperti ini.
Setelah membeli layar 4 sel dengan harga baik, saya mencari di Hackster proyek yang tersedia: ada beberapa proyek, untuk Arduino Nano. Jika Anda ingin melihat jam, menit, dan detik secara bersamaan: hanya beberapa proyek yang berhasil, karena Anda membutuhkan digit yang lebih kecil dari yang tersedia secara luas dengan 5x7 piksel per digit. Opsi adalah menggunakan library MD_Parola, tetapi ukuran kode terlalu besar untuk jam sederhana. Opsi yang diuji lainnya adalah library Max72xxPanel, tetapi ini terlalu lama dan memanggil library lain. Akhirnya, proyek ini didasarkan pada library antarmuka dasar MD_MAX722XX, yang termasuk di semua library lain.
Komentar dari situs ini membuat saya meninjau aspek hardware dan kode.
- Ada banyak library yang disebut DS3231. Saya menggunakan ini: https://www.rinkydinkelectronics.com/library.php?id=73
Arduino/chipKit library support for the DS3231 I2C Real-Time ClockCopyright (C)2015 Rinky-Dink Electronics, Henning Karlsen. All right reserved
- Pertama: layar LED matrix. Ada beberapa model di pasar, jadi sangat mungkin layar akan menampilkan hal-hal aneh setelah Anda mengunggah kode ini. Solusi: unggah contoh ini dari library "MD_MAX72xx_lib.h": "MD_MAX72xx_HW_Mapper.ino" dan temukan model hardware Anda. Dalam kode saya, model didefinisikan: #define HARDWARE_TYPE MD_MAX72XX::ICSTATION_HW, tetapi ini mungkin tidak akan bekerja sampai Anda menetapkan model yang benar!
- Detik kecil yang bagus tidak muncul akhirnya? Sekarang (v2), font untuk detik ini disertakan dalam kode, jadi tidak perlu mengubah library lain.
- Daftar peringatan kompilasi yang panjang terjadi karena pembaruan Arduino. Sekarang, bulan ada dalam array char dua dimensi dan tidak lagi menggunakan pointer. Peringatan lain berasal dari library DS3231.h, tetapi dapat diabaikan.
- Titik berkedip sekarang hanya 2 titik! Detik yang akurat ditampilkan, menggunakan font 3x5 saya, setelah "hh:mm". Selain itu, titik dua ":" berkedip hampir dua kali detik, hanya untuk menunjukkan bahwa masih hidup!
- Menanggapi permintaan: waktu ditampilkan selama 53 detik setiap menit dan selama 7 detik terakhir, tanggal dan suhu ditampilkan.
- Hari dalam seminggu juga dapat ditampilkan, jika Anda mencoret dua baris di dalam loop(). Dalam hal ini, Anda mungkin lebih suka mengurangi interval 53 detik menjadi 51.
- Jika Anda lebih suka format 12 jam, lihat salah satu jawaban lama saya.
- Waktu RTC dapat diatur di Arduino Serial Monitor dengan menulis di area input DD/MM/YYYY hh:mm:ss (jangan lupa spasi di antara) dan tekan Enter/Send. Ini dapat dilakukan kapan saja kabel USB terhubung dan Serial Monitor berfungsi (COM dan baud rate yang benar).
Kode baru menggunakan 13558 byte (44%) dan 372 byte (18%) untuk variabel, jadi sedikit lebih pendek!
Tanggal ditampilkan sebagai "dd Mon" dan suhu ruangan dalam derajat Celsius (diperkirakan menggunakan sensor internal RTC) ditampilkan di halaman terpisah. Kecerahan dikontrol oleh photo-resistor. Kode masih berfungsi, bahkan tanpa sensor cahaya.
Terima kasih atas minat Anda, yang ditunjukkan dengan tombol "respect"!
Kode
Versi lama - Jam Dot Matrix Arduino Nano
Versi baru (v2) - Jam Dot Matrix Arduino Nano
Versi lama - Jam Dot Matrix Arduino NanoArduino
Karena banyak library berubah sejak rilis awal, kode ini usang. Gunakan versi baru (versi 2). Semua koneksi dijelaskan dalam kode. Untuk font kecil, ubah beberapa baris di MD_MAX72xx_font.cpp, seperti yang dijelaskan dalam kode.
/* WARNING: Initial code is now obsolete. Use the new one (vesion 2) * Arduino Nano DS3231 clock with LED Matrix 4x(8x8) SPI * * Arduino Nano 5V logic - 32kB prog. space * Tools:Board: Arduino Nano; Processor: ATmega328P (Old Bootloader)!! * LED Matrix 4x(8x8) SPI with connector on the right side (last module) * https://www.banggood.com/MAX7219-Dot-Matrix-Module-4-in-1-Display-For-Arduino-p-1072083.html?rmmds=myorder&cur_warehouse=CN * * CONNECTIONS: * >> LCD 4x64 -> Arduino Nano: (using Hardware SPI): * 5V -> 5V pin * GND -> GND pin * CLK_PIN -> 13 // or SCK * DATA_PIN -> 11 // or MOSI * CS_PIN -> 10 // or SS * * >> DS3231 RTC -> Arduino Nano: * SDA (DAT) -> A4 * SCL (CLK) -> A5 * Inspired by : 1) Arduino Clock by AnthoTRONICS Last edit: March 22,2019 * but without MD_parola because of its large footprint! New getdate function. * 2) Simplest UNO Digital Clock Ever by plouc68000: * https://create.arduino.cc/projecthub/plouc68000/simplest-uno-digital-clock-ever-4613aa?ref=user&ref_id=680368&offset=1 * 3) LEDDotMatrixClock.ino by Leonardo Sposina, but here without "Max72xxPanel.h" * https://github.com/leonardosposina/arduino-led-dot-matrix-clock/blob/master/LEDDotMatrixClock/LEDDotMatrixClock.ino * Not using Max72xxPanel.h, but small size digits are stll used. Small footprint code here. * Replace in library MD_MAX72XX/src/MD_MAX72xx_font.cpp : * 1) #define USE_NEW_FONT 1 * 2) fonts #148 ... 158 must be replaced with 3x5 fonts: 3, 248, 136, 248, // 48 0 3, 144, 248, 128, // 49 1 3, 200, 168, 184, // 50 2 3, 136, 168, 248, // 51 3 3, 112, 72, 224, // 52 4 3, 184, 168, 232, // 53 5 3, 248, 168, 232, // 54 6 3, 8, 232, 24, // 55 7 3, 248, 168, 248, // 56 8 3, 184, 168, 248, // 57 9 1, 80, // 58 : * * project: 13790 bytes (44%); variables 361 bytes (17%) * Author: MVP https://www.hackster.io/M-V-P */ #include <SPI.h> #include "DS3231.h" #include "MD_MAX72xx_lib.h" //#include "Font_Data.h" DS3231 rtc(SDA, SCL); // Real time clock const byte LDR_PIN = A2; // LDR Sensor pin #define MAX_DEVICES 4 // Define pins #define CLK_PIN 13 // or SCK #define DATA_PIN 11 // or MOSI #define CS_PIN 10 // or SS #define HARDWARE_TYPE MD_MAX72XX::ICSTATION_HW #define USE_NEW_FONT 1 #define BUF_SIZE 20 // text buffer size #define CHAR_SPACING 1 // pixels between characters char buf[BUF_SIZE], secs[4]; uint8_t dots; // SPI hardware interface // Max72xxPanel matrix = Max72xxPanel(CS_PIN, H_DISPLAYS, V_DISPLAYS); MD_MAX72XX matrix = MD_MAX72XX(HARDWARE_TYPE, CS_PIN, MAX_DEVICES); const byte WAIT = 100; const byte SPACER = 1; byte FONT_WIDTH; bool timeset=false; void adjustClock(String data) { byte _day = data.substring(0,2).toInt(); byte _month = data.substring(3,5).toInt(); int _year = data.substring(6,10).toInt(); byte _hour = data.substring(11,13).toInt(); byte _min = data.substring(14,16).toInt(); byte _sec = data.substring(17,19).toInt(); rtc.setTime(_hour, _min, _sec); rtc.setDate(_day, _month, _year); Serial.println(F(">> Datetime successfully set!")); timeset=true; } byte ledintensitySelect(int light) { byte _value = 0; if (light >= 0 && light <= 127) { _value = 12; } else if (light >= 128 && light <= 319) { _value = 3; } else if (light >= 320 && light <= 512) { _value = 0; } return _value; }; void printText(uint8_t modStart, uint8_t modEnd, char *pMsg) // Print the text string to the LED matrix modules specified. // Message area is padded with blank columns after printing. { uint8_t state = 0; uint8_t curLen; uint16_t showLen; uint8_t cBuf[FONT_WIDTH]; int16_t col = ((modEnd + 1) * COL_SIZE) - 1; matrix.control(modStart, modEnd, MD_MAX72XX::UPDATE, MD_MAX72XX::OFF); do // finite state machine to print the characters in the space available { switch(state) { case 0: // Load the next character from the font table // if we reached end of message, reset the message pointer if (*pMsg == '\0') { showLen = col - (modEnd * COL_SIZE); // padding characters state = 2; break; } // retrieve the next character form the font file showLen = matrix.getChar(*pMsg++, sizeof(cBuf)/sizeof(cBuf[0]), cBuf); curLen = 0; state++; // !! deliberately fall through to next state to start displaying case 1: // display the next part of the character matrix.setColumn(col--, cBuf[curLen++]); // done with font character, now display the space between chars if (curLen == showLen) { showLen = CHAR_SPACING; state = 2; } break; case 2: // initialize state for displaying empty columns curLen = 0; state++; // fall through case 3: // display inter-character spacing or end of message padding (blank columns) matrix.setColumn(col--, 0); curLen++; if (curLen == showLen) state = 0; break; default: col = -1; // this definitely ends the do loop } } while (col >= (modStart * COL_SIZE)); matrix.control(modStart, modEnd, MD_MAX72XX::UPDATE, MD_MAX72XX::ON); } void setup() { pinMode(LDR_PIN, INPUT_PULLUP); Serial.begin(9600); Serial.println(F(">> Arduino 32x8 LED Dot Matrix Clock!")); Serial.println(F(">> Use <dd/mm/yyyy hh:mm:ss> format to set clock's date and hour!")); rtc.begin(); matrix.begin(); matrix.clear(); FONT_WIDTH= 5 + SPACER; // The font width is 5 pixels matrix.control(MD_MAX72XX::INTENSITY, 2);; // Use a value between 0 and 15 for brightness } void getDate() // Date Setup: Code for reading clock date { char* months[]={"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"}; String dts = rtc.getDateStr(); // Get dd/mm/yyyy string String dds=dts.substring(0,2); // Extract date String mms=dts.substring(3,5); // Extract month int mm=mms.toInt(); // Convert to month number dds.concat(" "); dds.concat(String(months[mm-1])); // Rebuild date string as "dd Mmm" dds.toCharArray(buf,sizeof(buf)); // return buffer } void getHour() // Date Setup: Code for reading clock date { String dts = rtc.getTimeStr(); // Get hh:mm:ss string String hhs=dts.substring(0,2); // Extract hour int hh=hhs.toInt(); // Convert to number if (hh < 10) dots=7; if(hh > 19 && hh < 24) dots=13; if ((hh > 9 && hh < 20) || (hh == 21)) dots=11; if (hh == 1) dots=5; if (hh == 11) dots=10; //String outmsg=dts.substring(0,5); // Extract hh:mm (optional) String outmsg=String(hh); // Extract h if h<10 outmsg.concat(":"); // add : outmsg.concat(dts.substring(3,5)); // add mm outmsg.toCharArray(buf,BUF_SIZE); } void showsec() { String dts = rtc.getTimeStr(); // Get hh:mm:ss string String scs1=dts.substring(6,7); String scs2=dts.substring(7); char sc1=148+scs1.toInt(); // Convert to index of char char sc2=148+scs2.toInt(); // Convert to index of char matrix.setChar(6,sc1); matrix.setChar(2,sc2); } void loop() { byte ledIntensity = ledintensitySelect(analogRead(LDR_PIN)); matrix.control(MD_MAX72XX::INTENSITY, ledIntensity);; // Use a value between 0 and 15 for brightness // Show hh:mm from buf getHour(); printText(0,MAX_DEVICES-1,buf); delay(WAIT); // Blinking two dots: for (uint8_t i=0; i<8; i++){ matrix.setColumn(MAX_DEVICES*8-dots,36); showsec(); delay(250); matrix.setColumn(MAX_DEVICES*8-dots,0); showsec(); delay(250); } // Exit by scrolling upwards: for (uint8_t i=0; i<8; i++){ matrix.transform(MD_MAX72XX::TSU); delay(2*WAIT); delay(WAIT); } getDate(); printText(0,MAX_DEVICES-1,buf); delay(20*WAIT); int temp = rtc.getTemp(); temp=temp-1; // Offset -1 C String outmsg=String(temp); outmsg.concat(" C"); outmsg.toCharArray(buf,BUF_SIZE); printText(0,MAX_DEVICES-1,buf); delay(20*WAIT); // Time setting in RTC: if (Serial.available() > 0 && timeset==false) { adjustClock(Serial.readString()); } }
Versi baru (v2) - Jam Dot Matrix Arduino NanoArduino
Diperbarui sesuai dengan library baru.
/* Arduino Nano DS3231 clock with LED Matrix 4x(8x8) SPI * Version 2 - updated 15/05/2-21 * Arduino Nano 5V logic - 32kB prog. space * Tools:Board: Arduino Nano; Processor: ATmega328P (Old Bootloader)!! * LED Matrix 4x(8x8) SPI with connector on the right side (last module) * https://www.banggood.com/MAX7219-Dot-Matrix-Module-4-in-1-Display-For-Arduino-p-1072083.html?rmmds=myorder&cur_warehouse=CN * * CONNECTIONS: * >> LCD 4x64 -> Arduino Nano: (using Hardware SPI): * 5V -> 5V pin * GND -> GND pin * CLK_PIN -> 13 // or SCK * DATA_PIN -> 11 // or MOSI * CS_PIN -> 10 // or SS * * >> DS3231 RTC -> Arduino Nano: * SDA (DAT) -> A4 * SCL (CLK) -> A5 * Inspired by : 1) Arduino Clock by AnthoTRONICS Last edit: March 22,2019 * but without MD_parola because of its large footprint! New getdate function. * 2) Simplest UNO Digital Clock Ever by plouc68000: * https://create.arduino.cc/projecthub/plouc68000/simplest-uno-digital-clock-ever-4613aa?ref=user&ref_id=680368&offset=1 * 3) LEDDotMatrixClock.ino by Leonardo Sposina, but here without "Max72xxPanel.h" * https://github.com/leonardosposina/arduino-led-dot-matrix-clock/blob/master/LEDDotMatrixClock/LEDDotMatrixClock.ino * Not using Max72xxPanel.h, but small size digits are stll used. Small footprint code here. * * project: 113558 bytes (44%); variables 372 bytes (17%) * Author: MVP https://www.hackster.io/M-V-P */ #include <SPI.h> #include "DS3231.h" #include "MD_MAX72xx_lib.h" //#include "Font_Data.h" DS3231 rtc(SDA, SCL); // Real time clock const byte LDR_PIN = A2; // LDR Sensor pin #define MAX_DEVICES 4 // Define pins #define CLK_PIN 13 // or SCK #define DATA_PIN 11 // or MOSI #define CS_PIN 10 // or SS // Define below your LED matrix hardware model: //#define HARDWARE_TYPE MD_MAX72XX::ICSTATION_HW #define HARDWARE_TYPE MD_MAX72XX::FC16_HW #define USE_NEW_FONT 1 #define BUF_SIZE 20 // text buffer size #define CHAR_SPACING 1 // pixels between characters char buf[BUF_SIZE], secs[4]; uint8_t hh, mm, ss, dots; // Definition of the small fonts: uint8_t Font3x5 [ 10 ][ 3 ]={ { 248, 136, 248}, // 48 0 {144, 248, 128}, // 49 1 {200, 168, 184}, // 50 2 {136, 168, 248}, // 51 3 {112, 72, 224}, // 52 4 {184, 168, 232}, // 53 5 {248, 168, 232}, // 54 6 {8, 232, 24}, // 55 7 {248, 168, 248}, // 56 8 {184, 168, 248}}; // 57 9 char months[12][4]= {"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"}; char* wday; // SPI hardware interface // Max72xxPanel matrix = Max72xxPanel(CS_PIN, H_DISPLAYS, V_DISPLAYS); MD_MAX72XX matrix = MD_MAX72XX(HARDWARE_TYPE, CS_PIN, MAX_DEVICES); const byte WAIT = 100; const byte SPACER = 1; byte FONT_WIDTH; bool timeset=false; void adjustClock(String data) { byte _day = data.substring(0,2).toInt(); byte _month = data.substring(3,5).toInt(); int _year = data.substring(6,10).toInt(); byte _hour = data.substring(11,13).toInt(); byte _min = data.substring(14,16).toInt(); byte _sec = data.substring(17,19).toInt(); rtc.setTime(_hour, _min, _sec); rtc.setDate(_day, _month, _year); Serial.println(F(">> Datetime successfully set!")); timeset=true; } byte ledintensitySelect(int light) { byte _value = 0; if (light >= 0 && light <= 127) { _value = 12; } else if (light >= 128 && light <= 319) { _value = 3; } else if (light >= 320 && light <= 512) { _value = 0; } return _value; }; void printText(uint8_t modStart, uint8_t modEnd, char *pMsg) // Print the text string to the LED matrix modules specified. // Message area is padded with blank columns after printing. { uint8_t state = 0; uint8_t curLen; uint16_t showLen; uint8_t cBuf[FONT_WIDTH]; int16_t col = ((modEnd + 1) * COL_SIZE) - 1; matrix.control(modStart, modEnd, MD_MAX72XX::UPDATE, MD_MAX72XX::OFF); do // finite state machine to print the characters in the space available { switch(state) { case 0: // Load the next character from the font table // if we reached end of message, reset the message pointer if (*pMsg == '\0') { showLen = col - (modEnd * COL_SIZE); // padding characters state = 2; break; } // retrieve the next character form the font file showLen = matrix.getChar(*pMsg++, sizeof(cBuf)/sizeof(cBuf[0]), cBuf); curLen = 0; state++; // !! deliberately fall through to next state to start displaying case 1: // display the next part of the character matrix.setColumn(col--, cBuf[curLen++]); // done with font character, now display the space between chars if (curLen == showLen) { showLen = CHAR_SPACING; state = 2; } break; case 2: // initialize state for displaying empty columns curLen = 0; state++; // fall through case 3: // display inter-character spacing or end of message padding (blank columns) matrix.setColumn(col--, 0); curLen++; if (curLen == showLen) state = 0; break; default: col = -1; // this definitely ends the do loop } } while (col >= (modStart * COL_SIZE)); matrix.control(modStart, modEnd, MD_MAX72XX::UPDATE, MD_MAX72XX::ON); } void setup() { pinMode(LDR_PIN, INPUT_PULLUP); Serial.begin(9600); Serial.println(F(">> Arduino 32x8 LED Dot Matrix Clock!")); Serial.println(F(">> Use <dd/mm/yyyy hh:mm:ss> format to set clock's date and hour!")); rtc.begin(); matrix.begin(); matrix.clear(); FONT_WIDTH= 5 + SPACER; // The font width is 5 pixels matrix.control(MD_MAX72XX::INTENSITY, 2);; // Use a value between 0 and 15 for brightness rtc.setDOW(); // Required for a new RTC } void getDate() // Date Setup: Code for reading clock date { String dts = rtc.getDateStr(); // Get dd/mm/yyyy string String dds=dts.substring(0,2); // Extract date String mms=dts.substring(3,5); // Extract month int mm=mms.toInt(); // Convert to month number dds.concat(" "); dds.concat(String(months[mm-1])); // Rebuild date string as "dd Mmm" dds.toCharArray(buf,sizeof(buf)); // return buffer wday = rtc.getDOWStr(2); } void getHour() // Date Setup: Code for reading clock date { String dts = rtc.getTimeStr(); // Get hh:mm:ss string String hhs=dts.substring(0,2); // Extract hour String mms=dts.substring(3,5); // Extract minutes hh=hhs.toInt(); // Convert to number mm=mms.toInt(); // Convert to number mm ss=(dts.substring(6,8)).toInt(); // Extract seconds as number if (hh >= 0 && hh < 10) dots=7; if (hh > 9 && hh < 20) dots=11; if (hh > 19 && hh < 25) dots=13; if (hh%10 == 1) dots-=2; //String outmsg=dts.substring(0,5); // Extract hh:mm (optional) String outmsg=String(hh); // Extract h if h<10 // outmsg.concat(":"); // add : but on 2 columns!! outmsg.concat(char(124)); // add 1 full column between numbers outmsg.concat(dts.substring(3,5)); // add mm outmsg.toCharArray(buf,BUF_SIZE); } // New version of function, using the small embedded fonts void showsec(uint8_t secs) { uint8_t secs1=secs%10; uint8_t secs2=secs/10; for (uint8_t k=0; k<3; k++){ matrix.setColumn(MAX_DEVICES*8-26-k,Font3x5 [secs2][k]); matrix.setColumn(MAX_DEVICES*8-30-k,Font3x5 [secs1][k]); } } void loop() { byte ledIntensity = ledintensitySelect(analogRead(LDR_PIN)); matrix.control(MD_MAX72XX::INTENSITY, ledIntensity);; // Use a value between 0 and 15 for brightness getHour(); // Read time from RTC printText(0,MAX_DEVICES-1,buf); // Show hh|mm from buf matrix.setColumn(MAX_DEVICES*8-dots,0); // Clear the | unsigned long inst =millis(); // mark this moment while (ss < 53){ // First 53 seconds of each minute show time while (millis() - inst > 1000){ inst =millis(); ss++; // Increase seconds showsec(ss); // Show seconds for (uint8_t i = 0; i < 2; i++){ matrix.setColumn(MAX_DEVICES*8-dots,36); // Blinking two dots: delay(240); matrix.setColumn(MAX_DEVICES*8-dots,0); delay(240); } } } // Then "time" is scrolling upwards: for (uint8_t i=0; i<8; i++){ matrix.transform(MD_MAX72XX::TSU); delay(3*WAIT); } // Write the current date: getDate(); printText(0,MAX_DEVICES-1,buf); delay(20*WAIT); // Write the week day (if uncommented): //printText(0,MAX_DEVICES-1,wday); //delay(20*WAIT); // Write the estimated room temperature from the RTC sensor int temp = rtc.getTemp(); temp=temp-1; // Offset -1 C String outmsg=String(temp); outmsg.concat(" C"); outmsg.toCharArray(buf,BUF_SIZE); printText(0,MAX_DEVICES-1,buf); delay(20*WAIT); // Time setting in RTC if Serial monitor is activated in Arduino IDE: if (Serial.available() > 0 && timeset==false) { adjustClock(Serial.readString()); } }
Skematik
Terinspirasi oleh Leonardo Sposina, tetapi #define CS_PIN(Matrix)<--> 10(Nano)
Skematiknya HAMPIR sama untuk semua proyek Matrix. Di sini photo-resistor asli. Seperti yang disebutkan dalam kode: #define CS_PIN(Matrix)<--> 10(Nano) https://github.com/leonardosposina/arduino-led-dot-matrix-clock
