Heltec ESP8266 OLED NodeMCU พร้อมจอ OLED ขนาด 0.91 นิ้ว

• Supply: Working voltage: 3.3V ~ 7V
• Chipset: Espressif ESP8266
• 32MByte Flash, WIFI antenna
• Display: 0.91-inch OLED 128 * 32
• Serial USB: CP2014USB Chipset
• Lipo battery interface
• charge and discharge circuit
• 12 x Digital pins - can be configured to read, write, IIC, SPI and PWM
• 1 x AD input

• CP2102 - Silicon Labs USB to Serial Driver 
• Arduino Resources from Manufacturer
• Library OLED.h

#include "ESP8266WiFi.h"
#include "OLED.h"

OLED display(4, 5);

void setup()
{
WiFi.mode(WIFI_STA);
WiFi.disconnect();

pinMode(16, OUTPUT);
digitalWrite(16, LOW);
delay(50);
digitalWrite(16, HIGH);
display.begin();

display.print("OLED test.", 0, 0);
delay(2000);
}

static void scanNetworks()
{
int n = WiFi.scanNetworks();
if (n == 0) {
display.print("Searching networks.", 0, 0);
} else {
display.print("Networks found: ", 0, 0);
for (int i = 0; i < n; ++i) {
// Print SSID for each network found
char currentSSID[64];
WiFi.SSID(i).toCharArray(currentSSID, 64);
display.print(currentSSID, i + 1, 0);
}
}

// Wait a bit before scanning again
delay(5000);
}

void loop()
{
scanNetworks();
}