Waveshare E-ink zaslon precizan voltmetar (0-90v DC) s Arduino Nano: 3 koraka

2024 Autor: John Day | [email protected]. Zadnja promjena: 2024-01-30 09:32

U ovom Instructable-u koristim 2,9-inčni Waveshare zaslon s e-papirom s Arduino Nano, djelitelj napona i ADS1115 za prikaz preciznih napona do 90 volti istosmjerne struje na zaslonu e-papira.

Ova instrukcija kombinira ova dva prethodna projekta:

-Arduino voltmetar (0-100V DC)-Verzija 2-https://www.instructables.com/Arduino-Volt-Meter-0…

-Djelomično osvježavanje zaslona e-papira s Arduinom-https://www.instructables.com/E-Paper-Display-Part…

Pribor

Korišteni potrošni materijal:

1 x Arduino Nano -

1 x Waveshare zaslon -

Oglasna ploča i žice -

USB Power Bank -

1 x ADS 1115 - 16 -bitni ADC -

1 x 1/4 W (ipak predlažem korištenje otpornika od 1 W) 1% otpornika - 690 k ohma -

1 x 1/4W (ipak predlažem korištenje otpornika od 1 W) 1% otpornika - 10 k ohma -

Astro AI DM6000AR -

9V baterije -

CanadianWinters sudionik je programa Amazon Services LLC Associates Program, programa za oglašavanje povezanih osoba osmišljen kako bi web stranicama omogućio zaradu povezivanjem na Amazon.com i pridružena web mjesta. Korištenjem ovih veza, kao suradnik Amazona, zarađujem od kvalificiranih kupnji, čak i ako kupite nešto drugo-i to vas neće ništa koštati.

Korak 1: Spojimo komponente

Komponente sam spojio na sljedeći način:

Waveshare prikaz:

Prikažite Arduino

ZAPOSLEN D7

RST D8

DC D9

CS D10

DIN D11

CLK D13

GND GND

VCC 3.3V

ADS1115:

ADS1115 Arduino

VCC 5V

GND GND

ADDR GND

SCL A5

SDA A4

AIN0 Razdjelnik napona

Za razdjelnik napona ovaj put sam koristio 680Kohm i 10Kohm otpornike. Uvijek mjerim vrijednosti otpora radi bolje točnosti.

Izračuni za razdjelnik napona dostupni su u ovoj proračunskoj tablici koja automatizira izračune u slučaju da želite koristiti različite vrijednosti otpornika: Veza do Google tablice. Imajte na umu da se datoteka ne može uređivati, morat ćete je preuzeti ili napraviti kopiju na pogonu da biste je mogli izmijeniti.

Korak 2: Kodiranje

Kod za zaslon i za ADC prilično su veliki i ne bi bilo dovoljno memorije na arduinu da koristim velike znakove na ekranu.

Da bih to riješio, pretvorio sam tekst u kod stvaranjem slike koja sadrži tekst, a zatim pomoću ovog mrežnog alata pretvorio sliku u kôd koji čita arduino:

I dalje sam koristio neke fontove i znakove, ali koristim samo font koji sadrži brojeve za prikaz napona baterije i postotka napunjenosti radi uštede memorije.

Ovaj kôd prikazuje napon baterije i prikazuje postotak napunjenosti, pod pretpostavkom da je baterija napunjena pri 90v i da je pri 0v baterija potpuno prazna. Ovo se može izmijeniti prema vašim potrebama.

// osnovna klasa GxEPD2_GFX može se koristiti za prosljeđivanje referenci ili pokazivača na instancu prikaza kao parametar, koristi ~ 1.2k više koda

// omogućiti ili onemogućiti osnovnu klasu GxEPD2_GFX #define ENABLE_GxEPD2_GFX 0 #include #include #include #include #include #include Adafruit_ADS1115 oglasa (0x48); // adresa ADC -a #ako je definirano (_ AVR) #define MAX_DISPLAY_BUFFER_SIZE 800 // #define MAX_HEIGHT (EPD) (EPD:: HEIGHT <= MAX_DISPLAY_BUFFER_SIZE / (EPD:: WIDTH / 8)? EPDI EPD:: WIDTH/ 8)) Prikaz GxEPD2_BW (GxEPD2_290 (/*CS = 10*/ SS,/*DC =*/ 9,/*RST =*/ 8,/*BUSY =*/ 7)); #endif U8G2_FOR_ADAFRUIT_GFX u8g2Fontovi; void setup () {Serial.begin (115200); Serial.println (); Serial.println ("postavljanje"); ads.begin (); display.init (); u8g2Fonts.begin (prikaz); // povezivanje u8g2 postupaka s Adafruit GFX showbitmaps (); kašnjenje (500); Serial.println ("postavljanje dovršeno"); } void loop () {vrijednosti (); kašnjenje (1000); } // 'charge-icon-c', 128x40px const unsigned char Bat PROGMEM = {0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00., 0x00, 0x00, 0x00, 0x0f, 0xc0, 0x00, 0x00, 0x0f, 0x80, 0x07, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf8, 0x00, 0x00, 0x00, 0x3f, 0x80, 0x000, 0x07, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf8, 0x00, 0x00, 0x01, 0xff, 0x80, 0x00, 0x00, 0x0f, 0x80, 0x07, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf8, 0xff, 0xf0, 0xf8, 0x07, 0xff, 0x00, 0x00, 0x00, 0x0f, 0x87, 0xc7, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf8, 0x00, 0x00, 0x3f, 0xff, 0x00, 0x00, 0x00, 0x0x, 0x00, 0x00, 0x0x, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xf0, 0xf8, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0x00, 0x0f, 0x87, 0xc7, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf8, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf8, 0x00, 0xff, 0xf0, 0xf8, 0x00, 0x00, 0x00, 0x0f, 0x87, 0xc7, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf8, 0x00, 0x1f, 0xff, 0xff, 0xff, 0xff, 0x80, 0x0f, 0x87, 0xff, 0xff, 0xff, 0x87, 0xff, 0xff, 0xf0, 0xf8, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x0f, 0x87, 0xc7, 0xff, 0xff, 0xff, 0x ff, 0xf0, 0xf8, 0x01, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x0f, 0x87, 0xc7, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf8, 0x00, 0x00, 0x00, 0x7, 0x00, 0x0f, 0x87, 0xc7, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf8, 0x00, 0x00, 0x00, 0xff, 0xff, 0x80, 0x00, 0x0f, 0x87, 0xc7, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 0xf8, 0x00, 0x00, 0x00, 0xff, 0xfc, 0x00, 0x00, 0x0f, 0x87, 0xc7, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf8, 0x00, 0x00, 0x01, 0xff, 0xf0, 0xff, 0xf0, 0x00, 0xff, 0xf0, 0xff, 0xff, 0xf0, 0xff, 0xff, 0xf0, 0x00, 0xff, 0xff, 0xf0, 0xf 0x87, 0xc7, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf8, 0x00, 0x00, 0x01, 0xff, 0x80, 0x00, 0x00, 0x0f, 0x87, 0xc7, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x01, 0xfe, 0x00, 0x00, 0x00, 0x0f, 0x80, 0x07, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf8, 0x00, 0x00, 0x03, 0xf0, 0x00, 0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf8, 0x00, 0x00, 0x03, 0xc0, 0x00, 0x00, 0x00, 0x0f, 0x80, 0x07, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf8, 0x00, 0xff, 0xf0, 0xf8, 0x00 0x00, 0x00, 0x00, 0x00, 0x0f, 0x80, 0x07, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1f, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 0xff, 0xf0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 0xff, 0xff, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00. 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1, 0xff, 0xff}; const unsigned char battext PROGMEM = {// 'logisoso_epaper_volts_simple4, 128x145px 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x1f, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 0xff, 0xf8, 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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf9, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; // ova funkcija crta slike void showbitmama () {uint16_t bg = GxEPD_WHITE; uint16_t fg = GxEPD_BLACK; display.firstPage (); do {display.fillScreen (bg); display.drawImage (battext, 0, 60, 128, 145, false, 0, true); // tekst (y odozdo, x s lijeve strane, visina y, duljina x, obrnuta_boja (točno/netočno), rotiranje (0, 1), prozirnost? (točno/netočno)) display.drawImage (Bat, 0, 5, 128, 40, netočno, 0, točno); // ikona baterije} while (display.nextPage ()); } // ova funkcija izračunava i ispisuje vrijednosti na zaslonu void values () {float battV; // Battery Voltage float perc; // Baterija % int calib = 7; // Vrijednost kalibracije ADS1115 za smanjenje greške plivajući napon = 0; // koristi se za spremanje vrijednosti napona plovak Radjust = 0,01437283477; // Faktor razdjelnika napona (R2 / R1+R2) R1 ~ 690k i R2 ~ 10k int16_t adc0; // 16 bita ADC čitanje ulaza A0 adc0 = ads.readADC_SingleEnded (0); napon = ((adc0 + calib) * 0,1875)/1000; battV = napon/Radjust; // Izračunajte % perc baterije = (battV/ 90) * 100; // pretpostavljamo da je maksimalni napon baterije 90v // zadržite bateriju % 2-znamenkasti max kako biste izbjegli probleme s prikazom if (perc> = 100) {perc = 99; } display.setRotation (1); // 0 Bez rotacije, 1 zakretanje 90 stupnjeva uint16_t bg = GxEPD_WHITE; uint16_t fg = GxEPD_BLACK; u8g2Fonts.setFontMode (1); // koristiti transparentni način rada u8g2 (ovo je zadano) u8g2Fonts.setFontDirection (0); // slijeva nadesno (ovo je zadano) u8g2Fonts.setForegroundColor (fg); // primjenjuje Adafruit GFX boju u8g2Fonts.setBackgroundColor (bg); // primjenjuje Adafruit GFX boju u8g2Fonts.setFont (u8g2_font_logisoso32_tn); // ili u8g2_font_logisoso32_tr ili u8g2_font_logisoso32_tn display.setPartialWindow (203, 0, 100, 128); // (x slijeva, y odozgo, duljina x, visina y) postavlja prozor za vrijednosti djelomično ažuriranje display.firstPage (); do {display.fillScreen (bg); // Ispis napona baterije u8g2Fonts.setCursor (205, 52); u8g2Fonts.print (battV, 1); // Ispis baterije % u8g2Fonts.setCursor (205, 110); u8g2Fonts.print (perc, 0); } while (display.nextPage ()); }

Korak 3: Isprobajmo:)

Zadovoljan sam rezultatima.

Uspio sam testirati niz napona od oko 9v do oko 85v uz minimalno odstupanje (manje od 0,2 volta) od stvarnog napona.

Nakon što se zapakira u lijepo kućište, ovo bi trebalo biti lijep mali voltmetar koji se može čitati u vrlo svijetlim okruženjima:).