WLED/usermods/ssd1306_i2c_oled_u8g2/wled06_usermod.ino

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#include <U8x8lib.h> // from https://github.com/olikraus/u8g2/
//The SCL and SDA pins are defined here.
//Lolin32 boards use SCL=5 SDA=4
#define U8X8_PIN_SCL 5
#define U8X8_PIN_SDA 4
// If display does not work or looks corrupted check the
// constructor reference:
// https://github.com/olikraus/u8g2/wiki/u8x8setupcpp
// or check the gallery:
// https://github.com/olikraus/u8g2/wiki/gallery
U8X8_SSD1306_128X32_UNIVISION_HW_I2C u8x8(U8X8_PIN_NONE, U8X8_PIN_SCL,
U8X8_PIN_SDA); // Pins are Reset, SCL, SDA
// gets called once at boot. Do all initialization that doesn't depend on
// network here
void userSetup() {
u8x8.begin();
u8x8.setPowerSave(0);
u8x8.setContrast(10); //Contrast setup will help to preserve OLED lifetime. In case OLED need to be brighter increase number up to 255
u8x8.setFont(u8x8_font_chroma48medium8_r);
u8x8.drawString(0, 0, "Loading...");
}
// gets called every time WiFi is (re-)connected. Initialize own network
// interfaces here
void userConnected() {}
// needRedraw marks if redraw is required to prevent often redrawing.
bool needRedraw = true;
// Next variables hold the previous known values to determine if redraw is
// required.
String knownSsid = "";
IPAddress knownIp;
uint8_t knownBrightness = 0;
uint8_t knownMode = 0;
uint8_t knownPalette = 0;
long lastUpdate = 0;
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long lastRedraw = 0;
bool displayTurnedOff = false;
// How often we are redrawing screen
#define USER_LOOP_REFRESH_RATE_MS 5000
void userLoop() {
// Check if we time interval for redrawing passes.
if (millis() - lastUpdate < USER_LOOP_REFRESH_RATE_MS) {
return;
}
lastUpdate = millis();
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// Turn off display after 3 minutes with no change.
if(!displayTurnedOff && millis() - lastRedraw > 3*60*1000) {
u8x8.setPowerSave(1);
displayTurnedOff = true;
}
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// Check if values which are shown on display changed from the last time.
if (((apActive) ? String(apSSID) : WiFi.SSID()) != knownSsid) {
needRedraw = true;
} else if (knownIp != (apActive ? IPAddress(4, 3, 2, 1) : WiFi.localIP())) {
needRedraw = true;
} else if (knownBrightness != bri) {
needRedraw = true;
} else if (knownMode != strip.getMode()) {
needRedraw = true;
} else if (knownPalette != strip.getSegment(0).palette) {
needRedraw = true;
}
if (!needRedraw) {
return;
}
needRedraw = false;
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if (displayTurnedOff)
{
u8x8.setPowerSave(0);
displayTurnedOff = false;
}
lastRedraw = millis();
// Update last known values.
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#if defined(ESP8266)
knownSsid = apActive ? WiFi.softAPSSID() : WiFi.SSID();
#else
knownSsid = WiFi.SSID();
#endif
knownIp = apActive ? IPAddress(4, 3, 2, 1) : WiFi.localIP();
knownBrightness = bri;
knownMode = strip.getMode();
knownPalette = strip.getSegment(0).palette;
u8x8.clear();
u8x8.setFont(u8x8_font_chroma48medium8_r);
// First row with Wifi name
u8x8.setCursor(1, 0);
u8x8.print(knownSsid.substring(0, u8x8.getCols() > 1 ? u8x8.getCols() - 2 : 0));
// Print `~` char to indicate that SSID is longer, than owr dicplay
if (knownSsid.length() > u8x8.getCols())
u8x8.print("~");
// Second row with IP or Psssword
u8x8.setCursor(1, 1);
// Print password in AP mode and if led is OFF.
if (apActive && bri == 0)
u8x8.print(apPass);
else
u8x8.print(knownIp);
// Third row with mode name
u8x8.setCursor(2, 2);
uint8_t qComma = 0;
bool insideQuotes = false;
uint8_t printedChars = 0;
char singleJsonSymbol;
// Find the mode name in JSON
for (size_t i = 0; i < strlen_P(JSON_mode_names); i++) {
singleJsonSymbol = pgm_read_byte_near(JSON_mode_names + i);
switch (singleJsonSymbol) {
case '"':
insideQuotes = !insideQuotes;
break;
case '[':
case ']':
break;
case ',':
qComma++;
default:
if (!insideQuotes || (qComma != knownMode))
break;
u8x8.print(singleJsonSymbol);
printedChars++;
}
if ((qComma > knownMode) || (printedChars > u8x8.getCols() - 2))
break;
}
// Fourth row with palette name
u8x8.setCursor(2, 3);
qComma = 0;
insideQuotes = false;
printedChars = 0;
// Looking for palette name in JSON.
for (size_t i = 0; i < strlen_P(JSON_palette_names); i++) {
singleJsonSymbol = pgm_read_byte_near(JSON_palette_names + i);
switch (singleJsonSymbol) {
case '"':
insideQuotes = !insideQuotes;
break;
case '[':
case ']':
break;
case ',':
qComma++;
default:
if (!insideQuotes || (qComma != knownPalette))
break;
u8x8.print(singleJsonSymbol);
printedChars++;
}
if ((qComma > knownMode) || (printedChars > u8x8.getCols() - 2))
break;
}
u8x8.setFont(u8x8_font_open_iconic_embedded_1x1);
u8x8.drawGlyph(0, 0, 80); // wifi icon
u8x8.drawGlyph(0, 1, 68); // home icon
u8x8.setFont(u8x8_font_open_iconic_weather_2x2);
u8x8.drawGlyph(0, 2, 66 + (bri > 0 ? 3 : 0)); // sun/moon icon
}