![\"\"](\"https:\/\/research.itplants.com\/wp\/wp-content\/uploads\/2019\/08\/75ef21821e214c3f847895e740484fd4.jpg\")
<\/a><\/p>\nTTGO-T-Display<\/a>\u3068\u3044\u3046\u30e9\u30a4\u30d6\u30e9\u30ea\u30fc\u3067\u8868\u793a\u3067\u304d\u307e\u3059\u3002<\/p>\n \u4ed6\u306b\u3082\uff12\u3064\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u30fc\u3082\u5fc5\u8981\u3067\u3059\u3002<\/p>\n \u3068\u3042\u308a\u307e\u3059\u304c\u3001 #include <User_Setup.h> \/\/ Default setup is root library folder<\/p>\n \u306f\u3001\u30b3\u30e1\u30f3\u30c8\u30a2\u30a6\u30c8\u3057\u307e\u3059\u3002<\/p>\n Arduino IDE\u3067\u306f\u3001Preferences > \u8ffd\u52a0\u306e\u30dc\u30fc\u30c9\u30de\u30cd\u30fc\u30b8\u30e3\u306eURL\u306b\u3001<\/p>\n https:\/\/docs.heltec.cn\/download\/package_heltec_esp32_index.json<\/p>\n \u3092\u8ffd\u52a0\u3057\u3066\u3001\u30dc\u30fc\u30c9\u30de\u30cd\u30fc\u30b8\u30e3\u3067Heltec\u00a0 WiFi Kit 32\u3092\u9078\u629e\u3057\u307e\u3059\u3002<\/p>\n \u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u66f8\u304d\u8fbc\u307f\u6642\u306b\u306f\u3001TTGO\u306e\u53f3\u30dc\u30bf\u30f3\u3092\u62bc\u3059\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n TFT_eSPI tft = TFT_eSPI(135<\/span>, 240<\/span>); \/\/ Invoke custom library<\/span><\/p>\n \u3092<\/p>\n TFT_eSPI tft = TFT_eSPI(240, 320); \/\/ ST7789V<\/span><\/p>\n \u306b\u5909\u66f4\u3057\u306a\u3044\u3068\u3001\u5168\u753b\u9762\u8868\u793a\u3055\u308c\u307e\u305b\u3093\u3002OLED\u306e\u89e3\u50cf\u5ea6\u304c\u4e0a\u304c\u3063\u3066\u3044\u308b\u307f\u305f\u3044\u3067\u3059\u3002<\/p>\n tft.drawString(“WORD”, tft.width() \/ 2, tft.height() \/ 2 );<\/p>\n \u3067\u753b\u9762\u4e2d\u592e\u306b\u6587\u5b57\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n tft.setRotation(1);<\/p>\n \u3067\u753b\u9762\u306e\u9577\u3044\u65b9\u5411\u306b\u6587\u5b57\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n tft.pushImage(x_disp_offset, y_disp_offset, 240, 135, ttgo);<\/p>\n tft.drawString(buff, x_disp_offset, y_disp_offset+i*10);<\/p>\n \u306e\u3088\u3046\u306b\u3001x_disp_offset, y_disp_offset\u3092\u4ed8\u3051\u306a\u3044\u3068\u6b63\u78ba\u306a\u4f4d\u7f6e\u306b\u6587\u5b57\u3084\u753b\u50cf\u304c\u8868\u793a\u3055\u308c\u307e\u305b\u3093\u3002<\/p>\n #define x_disp_offset 40 \u307b\u3069\u3067\u6b63\u78ba\u306a\u4f4d\u7f6e\u306b\u8868\u793a\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n <\/p>\n TTGO-T-Display.ino<\/p>\n #include <TFT_eSPI.h> #define TFT_MOSI 19 #define TFT_BL 4 \/\/ Display backlight control pin #define x_disp_offset 40 \/\/TFT_eSPI tft = TFT_eSPI(135, 240); \/\/ Invoke custom library Button2 *pBtns = nullptr; void showVoltage() void button_init() pBtns[1].setPressedHandler([](Button2 & b) { void button_loop() void wifi_scan() tft.drawString(“Scan Network”, tft.width() \/ 2, tft.height() \/ 2);<\/p>\n WiFi.mode(WIFI_STA); int16_t n = WiFi.scanNetworks(); void setup() Serial.println(“Start”); if (TFT_BL > 0) { tft.setRotation(1); button_init();<\/p>\n esp_adc_cal_characteristics_t adc_chars; void loop() <\/p>\n <\/p>\n","protected":false},"excerpt":{"rendered":" TTGO\u306f\u3001OLED\u4ed8\u304d\u306eESP32\u3067\u3059\u30021000\u5186\u4ee5\u4e0b\u3067\u8cfc\u5165\u3067\u304d\u307e\u3059\u3002OLED\u306f\u3001ST7789V 1.14inch\u306e\u30c7\u30a3\u30b9\u30d7\u30ec\u30a3\u304cSPI\u3067\u3064\u306a\u304c\u3063\u3066\u3044\u307e\u3059\u3002 TTGO-T-Display\u3068\u3044\u3046\u30e9\u30a4\u30d6\u30e9\u30ea\u30fc\u3067\u8868\u793a\u3067\u304d\u307e\u3059…<\/p>\n\n
<\/a>2.TFT_eSPI settings<\/h2>\n
\n
User_Setups\/TTGO_T_Display.h<\/code> to TFT_eSPI\/User_Setups\/<\/code><\/li>\n#include <User_Setups\/TTGO_T_Display.h><\/code> to TFT_eSPI\/User_Setup_Select.h<\/code><\/li>\n<\/ul>\nTFT_eSPI\/User_Setup_Select.h<\/code>\u5185\u306e<\/p>\n
\n#define y_disp_offset 55<\/p>\n
\n#include <SPI.h>
\n#include “WiFi.h”
\n#include <Wire.h>
\n#include <Button2.h>
\n#include “esp_adc_cal.h”
\n#include <Ticker.h>
\n#include “bmp.h”<\/p>\n
\n#define TFT_SCLK 18
\n#define TFT_CS 5
\n#define TFT_DC 16
\n#define TFT_RST 23<\/p>\n
\n#define ADC_EN 14
\n#define ADC_PIN 34
\n#define BUTTON_1 35
\n#define BUTTON_2 0
\n#define BUTTONS_MAP {BUTTON_1,BUTTON_2}<\/p>\n
\n#define y_disp_offset 55<\/p>\n
\nTFT_eSPI tft = TFT_eSPI(240, 320); \/\/ ST7789V<\/p>\n
\nuint8_t g_btns[] = BUTTONS_MAP;
\nchar buff[320];
\nint vref = 1100;
\nint btnCick = false;
\nTicker tick;<\/p>\n
\n{
\nstatic uint64_t timeStamp = 0;
\nif (millis() – timeStamp > 1000) {
\ntimeStamp = millis();
\nuint16_t v = analogRead(ADC_PIN);
\nfloat battery_voltage = ((float)v \/ 4095.0) * 2.0 * 3.3 * (vref \/ 1000.0);
\nString voltage = “Voltage :” + String(battery_voltage) + “V”;
\nSerial.println(voltage);
\ntft.fillScreen(TFT_BLACK);
\n\/\/tft.setTextDatum(MC_DATUM);
\ntft.setTextDatum(TC_DATUM);
\ntft.drawString(voltage, tft.width() \/ 2, tft.height() \/ 2 );
\n}
\n}<\/p>\n
\n{
\nuint8_t args = sizeof(g_btns) \/ sizeof(g_btns[0]);
\npBtns = new Button2 [args];
\npBtns[0] = Button2(g_btns[0]);
\npBtns[1] = Button2(g_btns[1]);
\npBtns[0].setLongClickHandler([](Button2 & b) {
\nbtnCick = false;
\nint r = digitalRead(TFT_BL);
\ntft.fillScreen(TFT_BLACK);
\ntft.setTextColor(TFT_GREEN, TFT_BLACK);
\ntft.setTextDatum(MC_DATUM);
\ntft.drawString(“Press again to wake up”, tft.width() \/ 2, tft.height() \/ 2 );
\ndelay(3000);
\ndigitalWrite(TFT_BL, !r);
\ntft.writecommand(TFT_DISPOFF);
\ntft.writecommand(TFT_SLPIN);
\nesp_sleep_enable_ext1_wakeup(GPIO_SEL_35, ESP_EXT1_WAKEUP_ALL_LOW);
\nesp_deep_sleep_start();
\n});
\npBtns[0].setPressedHandler([](Button2 & b) {
\nSerial.println(“Detect Voltage..”);
\nbtnCick = true;
\n});<\/p>\n
\nbtnCick = false;
\nSerial.println(“btn press wifi scan”);
\nwifi_scan();
\n});
\n}<\/p>\n
\n{
\nfor (int i = 0; i < sizeof(g_btns) \/ sizeof(g_btns[0]); ++i) {
\npBtns[i].loop();
\n}
\n}<\/p>\n
\n{
\ntft.setTextColor(TFT_GREEN, TFT_BLACK);
\ntft.fillScreen(TFT_BLACK);
\ntft.setTextDatum(MC_DATUM);
\ntft.setTextSize(1);<\/p>\n
\nWiFi.disconnect();
\ndelay(100);<\/p>\n
\ntft.fillScreen(TFT_BLACK);
\nif (n == 0) {
\ntft.drawString(“no networks found”, tft.width() \/ 2, tft.height() \/ 2);
\n} else {
\ntft.setTextDatum(TL_DATUM);
\ntft.setCursor(0, 0);
\nSerial.printf(“Found \nfor (int i = 0; i < n; ++i) {
\nsprintf(buff,
\n“[\ni + 1,
\nWiFi.SSID(i).c_str(),
\nWiFi.RSSI(i));
\n\/\/tft.println(buff);
\ntft.drawString(buff, x_disp_offset, y_disp_offset+i*10);
\n}
\n}
\nWiFi.mode(WIFI_OFF);
\n}<\/p>\n
\n{
\nSerial.begin(115200);
\ndelay(1000);<\/p>\n
\n\/\/Serial.println( tft.width());
\n\/\/Serial.println( tft.height());
\ntft.init();
\ntft.setRotation(1);
\ntft.fillScreen(TFT_BLACK);
\ntft.setTextSize(2);
\ntft.setTextColor(TFT_WHITE);
\ntft.setCursor(0, 0);
\ntft.setTextDatum(MC_DATUM);
\ntft.drawString(“TTGO”, tft.width() \/ 2, tft.height() \/ 2 );
\ntft.setTextSize(1);<\/p>\n
\npinMode(TFT_BL, OUTPUT);
\ndigitalWrite(TFT_BL, HIGH);
\n}<\/p>\n
\ntft.pushImage(x_disp_offset, y_disp_offset, 240, 135, ttgo);
\ndelay(5000);
\ntft.setRotation(1);
\nint i = 1;
\nwhile (i–) {
\ntft.fillScreen(TFT_RED);
\ndelay(1000);
\ntft.fillScreen(TFT_BLUE);
\ndelay(1000);
\ntft.fillScreen(TFT_GREEN);
\ndelay(200);
\n}<\/p>\n
\nesp_adc_cal_value_t val_type = esp_adc_cal_characterize((adc_unit_t)ADC_UNIT_1, (adc_atten_t)ADC1_CHANNEL_6, (adc_bits_width_t)ADC_WIDTH_BIT_12, 1100, &adc_chars);
\n\/\/Check type of calibration value used to characterize ADC
\nif (val_type == ESP_ADC_CAL_VAL_EFUSE_VREF) {
\nSerial.printf(“eFuse Vref:\nvref = adc_chars.vref;
\n} else if (val_type == ESP_ADC_CAL_VAL_EFUSE_TP) {
\nSerial.printf(“Two Point –> coeff_a:\n} else {
\nSerial.println(“Default Vref: 1100mV”);
\n}
\n}<\/p>\n
\n{
\nif (btnCick) {
\nshowVoltage();
\n}
\nbutton_loop();
\n}<\/p>\n