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

2024 Autor: John Day | [email protected]. Zadnja izmjena: 2024-01-30 08:04

U ovom Instructable-u koristim 2,9-inčni Waveshare ekran s e-papirom s Arduino Nano-om, razdjelnikom napona i ADS1115 za prikaz preciznih napona do 90 volti istosmjerne struje na displeju 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 prikaza e-papira pomoću Arduina-https://www.instructables.com/E-Paper-Display-Part…

Supplies

Korišćeni potrošni materijal:

1 x Arduino Nano -

1 x Waveshare ekran -

Oglasna ploča i žice -

USB Power Bank -

1 x ADS 1115 - 16 -bitni ADC -

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

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

Astro AI DM6000AR -

9V baterije -

CanadianWinters je učesnik programa Amazon Services LLC Associates, programa za oglašavanje partnera koji je osmišljen kako bi web lokacijama omogućio zaradu putem povezivanja na Amazon.com i pridružene web stranice. Korištenjem ovih veza, kao Amazon saradnik, zarađujem od kvalificiranih kupovina, čak i ako kupite nešto drugo-i to vas neće ništa koštati.

Korak 1: Spojimo komponente

Komponente sam povezao na sljedeći način:

Waveshare ekran:

Prikažite Arduino

BUSY 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 tačnosti.

Izračuni za razdjelnik napona dostupni su u ovoj proračunskoj tablici koja automatizira proračune 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: Kodirajte

Kod za ekran i za ADC je prilično velik i ne bi bilo dovoljno memorije na arduinu da koristim velike znakove na ekranu.

Da bih riješio ovo, pretvorio sam tekst u kôd 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, pretpostavljajući da je baterija napunjena pri 90v i da je pri 0v baterija potpuno prazna. Ovo se može prilagoditi 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

// omogućavanje ili onemogućavanje osnovne klase GxEPD2_GFX #define ENABLE_GxEPD2_GFX 0 #include #include #include #include #include #include Adafruit_ADS1115 ads (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)) GxEPD2_BW prikaz (GxEPD2_290 (/*CS = 10*/ SS,/*DC =*/ 9,/*RST =*/ 8,/*BUSY =*/ 7)); #endif U8G2_FOR_ADAFRUIT_GFX u8g2Fonts; void setup () {Serial.begin (115200); Serial.println (); Serial.println ("postavljanje"); ads.begin (); display.init (); u8g2Fonts.begin (prikaz); // povezujemo u8g2 procedure sa Adafruit GFX showbitmama (); kašnjenje (500); Serial.println ("postavljanje završeno"); } void loop () {values (); 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, 0x 07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 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, 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, 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, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x80, 0x07, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf8, 0x00, 0x00, 0x00, 0x01, 0xc0, 0x00, 0x00, 0x0f, 0x80, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x0f, 0xc0, 0x00, 0x00, 0x0f, 0x80, 0x07, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf8, 0x00, 0x00, 0x00, 0x3f, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0, 0x07, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf8, 0x00, 0x00, 0x01, 0xff, 0x80, 0x00, 0x00, 0x0f, 0x80, 0x07, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf8, 0xff, 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, 0x00., 0x00, 0x00, 0x00, 0x0f, 0x87, 0xc7, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf8, 0x00, 0x1f, 0xff, 0xff, 0xff, 0xff, 0x80, 0x0f, 0x87, 0xc7, 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 0xf8, 0x00, 0x00, 0x00, 0xff, 0xfc, 0x00, 0x00, 0x0f, 0x87, 0xc7, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf8, 0x00, 0x00, 0x01, 0xff, 0xf0, 0x00, 0xff, 0xf0, 0x00, 0xff, 0xf0, 0x00, 0xff, 0xff, 0xf0, 0x00, 0x00, 0xff, 0xf, 0xf, 0x87, 0xc7, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf8, 0x00, 0x00, 0x01, 0xff, 0x80, 0x00, 0x00, 0x0f, 0x87, 0xc7, 0xff, 0xff, 0xff, 0xff, 0xf 0, 0x00, 0x01, 0xfe, 0x00, 0x00, 0x00, 0x0f, 0x80, 0x07, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf8, 0x00, 0x00, 0x03, 0xf0, 0x00, 0x00, 0x00, 0x0, 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, 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, 0xff, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x87, 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. 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, 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, 0xf8, 0xff, 0x1f, 0x1f, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0xff, 0x1f, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 0x87, 0xf1, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0xfe, 0x1f, 0x1f, 0xff, 0xf8, 0xff, 0xff, 0x8f, 0xf1, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 0x7e, 0x1f, 0x1f, 0xff, 0xf8, 0xff, 0xff, 0x87, 0xf1, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x38, 0x00, 0x1f, 0xff, 0xf8, 0xff, 0xff, 0xf8, 0xff, 0xff, 0xf8, 0xff, 0xff, 0xff, 0xf8, 0xff 0xf0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x3f, 0xff, 0xf8, 0xff, 0xff, 0xc3, 0xc0, 0x61, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 0x7f, 0xff, 0xf8, 0xff, 0xff, 0xe0, 0x00, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc3, 0xff, 0xff, 0xff, 0xf8, 0xff, 0xff, 0xf0, 0x 04, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0xff, 0xff, 0xf8, 0x0f, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x07, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff 0xf0, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0xff, 0xff, 0xc0, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 0xff, 0xff, 0xff, 0xff, 0xf8, 0xff, 0xff, 0xc0, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0xff, 0xff, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 0xff, 0xff, 0xf8, 0xff, 0xff, 0xcf, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfd, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x ff, 0xff, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 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}; // 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, dužina x, obrnuta_boja (true/false), rotiranje (0, 1), transparentnost? (true/false)) display.drawImage (Bat, 0, 5, 128, 40, netačno, 0, tačno); // ikona baterije} while (display.nextPage ()); } // ova funkcija izračunava i ispisuje vrijednosti na ekranu void values () {float battV; // Plutajući napon baterije 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 bitovi ADC čitanje ulaza A0 adc0 = ads.readADC_SingleEnded (0); napon = ((adc0 + calib) * 0,1875)/1000; battV = napon/Radjust; // Izračunajte bateriju % perc = (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 rotacija 90 stepeni uint16_t bg = GxEPD_WHITE; uint16_t fg = GxEPD_BLACK; u8g2Fonts.setFontMode (1); // koristimo u8g2 transparentni način (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, dužina x, visina y) postavlja prozor za vrijednosti djelomičnog ažuriranja display.firstPage (); do {display.fillScreen (bg); // Ispis napona baterije u8g2Fonts.setCursor (205, 52); u8g2Fonts.print (battV, 1); // Štampa baterija % u8g2Fonts.setCursor (205, 110); u8g2Fonts.print (perc, 0); } while (display.nextPage ()); }

Korak 3: Hajde da testiramo:)

Zadovoljan sam rezultatima.

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

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