Hi,
I recently tried to turn my 7.3in 7 colour e paper (bought from waveshare and have its respective hat as well) to a weather station and used the code here: GitHub - xJBx1/weather_module
The code complies and uploads to the esp32 board however nothing is displayed, I tried to print just a simple triangle but again it didnt work.
I am suspecting its the gxepd library that is not working with my display.
Can anyone please help with this.
Post your annotated schematic showing all connections, power, ground and power sources. Also post your code using code tags.
Can you verify your code (versus the library) by sending output to Serial Monitor?
Also... verify your hardware is clear of the precautions on this page...
And... verify if your epaper is old and 3v3, or new and 5v. (via the link)
That is my output when I run the code, everything else is displayed except the screen being refreshed.......
The hardware I have is 7.3inch e-Paper HAT (F) 7 colour
above is the schematic where the right side pins attach to the driver board of the e paper, currently I am not powering the esp with the battery power since I wanted to see the output on the serial monitor, hence it it powered by the micro usb cable via my pc.
initDisplay();
do
{
drawCurrentConditions(owm_onecall.current, owm_onecall.daily[0],
owm_air_pollution, owm_onecall.hourly[0]);
drawForecast(owm_onecall.daily, timeInfo);
drawLocationDate(CITY_STRING, dateStr);
drawOutlookGraph(owm_onecall.hourly, timeInfo);
#if DISPLAY_ALERTS
drawAlerts(owm_onecall.alerts, CITY_STRING, dateStr);
#endif
drawStatusBar(statusStr, refreshTimeStr, wifiRSSI, batteryVoltage);
} while (display.nextPage());
powerOffDisplay();
above is the code snippet which is meant to initialise, refresh, display and close the screen.
below is the expansion of some of the functions above.
void initDisplay()
{
SPI.begin(PIN_EPD_SCK,
PIN_EPD_MISO,
PIN_EPD_MOSI,
PIN_EPD_CS);
display.init(115200, true, 2, false);
display.setRotation(0);
display.setTextSize(1);
display.setTextColor(GxEPD_BLACK);
display.setTextWrap(false);
//display.fillScreen(GxEPD_WHITE);
display.setFullWindow();
display.firstPage(); // use paged drawing mode, sets fillScreen(GxEPD_WHITE)
return;
} // end initDisplay
/* Power-off e-paper display
*/
void powerOffDisplay()
{
display.hibernate(); // turns powerOff() and sets controller to deep sleep for
// minimum power use
digitalWrite(PIN_EPD_PWR, LOW);
return;
} // end initDisplay
/* This function is responsible for drawing the current conditions and
* associated icons.
*/
void drawCurrentConditions(const owm_current_t ¤t,
const owm_daily_t &today,
const owm_resp_air_pollution_t &owm_air_pollution,
const owm_hourly_t &hourly)
{
String dataStr, unitStr;
const float moonPhase = today.moon_phase;
// current weather icon
display.drawInvertedBitmap(0, 0,
getCurrentConditionsBitmap196(current, today),
196, 196, GxEPD_BLACK);
// current temp
#ifdef UNITS_TEMP_KELVIN
dataStr = String(static_cast<int>(round(current.temp)));
unitStr = TXT_UNITS_TEMP_KELVIN;
#endif
#ifdef UNITS_TEMP_CELSIUS
dataStr = String(static_cast<int>(round(kelvin_to_celsius(current.temp))));
unitStr = TXT_UNITS_TEMP_CELSIUS;
#endif
#ifdef UNITS_TEMP_FAHRENHEIT
dataStr = String(static_cast<int>(round(kelvin_to_fahrenheit(current.temp))));
unitStr = TXT_UNITS_TEMP_FAHRENHEIT;
#endif
// FONT_**_temperature fonts only have the character set used for displaying
// temperature (0123456789.-\xB0)
display.setFont(&FONT_48pt8b_temperature);
#if defined(DISP_BW_V2) || defined(DISP_3C_B) || defined(DISP_7C_F)
drawString(196 + 164 / 2 - 20, 196 / 2 + 69 / 2, dataStr, CENTER);
#elif defined(DISP_BW_V1)
drawString(156 + 164 / 2 - 20, 196 / 2 + 69 / 2, dataStr, CENTER);
#endif
display.setFont(&FONT_14pt8b);
drawString(display.getCursorX(), 196 / 2 - 69 / 2 + 20, unitStr, LEFT);
// current feels like
#ifdef UNITS_TEMP_KELVIN
dataStr = String(TXT_FEELS_LIKE) + ' '
+ String(static_cast<int>(round(current.feels_like)));
#endif
#ifdef UNITS_TEMP_CELSIUS
dataStr = String(TXT_FEELS_LIKE) + ' '
+ String(static_cast<int>(round(
kelvin_to_celsius(current.feels_like))))
+ '\xB0';
#endif
#ifdef UNITS_TEMP_FAHRENHEIT
dataStr = String(TXT_FEELS_LIKE) + ' '
+ String(static_cast<int>(round(
kelvin_to_fahrenheit(current.feels_like))))
+ '\xB0';
#endif
display.setFont(&FONT_12pt8b);
#if defined(DISP_BW_V2) || defined(DISP_3C_B) || defined(DISP_7C_F)
drawString(196 + 164 / 2, 98 + 69 / 2 + 12 + 17, dataStr, CENTER);
#elif defined(DISP_BW_V1)
drawString(156 + 164 / 2, 98 + 69 / 2 + 12 + 17, dataStr, CENTER);
#endif
// line dividing top and bottom display areas
// display.drawLine(0, 196, DISP_WIDTH - 1, 196, GxEPD_BLACK);
// current weather data icons
display.drawInvertedBitmap(0, 204 + (48 + 8) * 0,
wi_sunrise_48x48, 48, 48, GxEPD_BLACK);
display.drawInvertedBitmap(0, 204 + (48 + 8) * 1,
wi_strong_wind_48x48, 48, 48, GxEPD_BLACK);
display.drawInvertedBitmap(0, 204 + (48 + 8) * 2,
wi_day_sunny_48x48, 48, 48, GxEPD_BLACK);
#if defined(DISP_BW_V2) || defined(DISP_3C_B) || defined(DISP_7C_F)
display.drawInvertedBitmap(0, 204 + (48 + 8) * 3,
air_filter_48x48, 48, 48, GxEPD_BLACK);
if(moonPhase == 0 || moonPhase == 1){
display.drawInvertedBitmap(0, 204 + (48 + 8) * 4,
wi_moon_alt_new_48x48, 48, 48, GxEPD_BLACK);
} else if (moonPhase<0.25){
display.drawInvertedBitmap(0, 204 + (48 + 8) * 4,
wi_moon_alt_waxing_crescent_3_48x48, 48, 48, GxEPD_BLACK);
} else if (moonPhase == 0.25){
display.drawInvertedBitmap(0, 204 + (48 + 8) * 4,
wi_moon_alt_first_quarter_48x48, 48, 48, GxEPD_BLACK);
} else if(moonPhase<0.5){
display.drawInvertedBitmap(0, 204 + (48 + 8) * 4,
wi_moon_alt_waxing_gibbous_3_48x48, 48, 48, GxEPD_BLACK);
} else if(moonPhase == 0.5){
display.drawInvertedBitmap(0, 204 + (48 + 8) * 4,
wi_moon_alt_full_48x48, 48, 48, GxEPD_BLACK);
} else if (moonPhase<0.75){
display.drawInvertedBitmap(0, 204 + (48 + 8) * 4,
wi_moon_alt_waning_gibbous_3_48x48, 48, 48, GxEPD_BLACK);
}else if (moonPhase == 0.75){
display.drawInvertedBitmap(0, 204 + (48 + 8) * 4,
wi_moon_alt_third_quarter_48x48, 48, 48, GxEPD_BLACK);
}else {
display.drawInvertedBitmap(0, 204 + (48 + 8) * 4,
wi_moon_alt_waning_crescent_5_48x48, 48, 48, GxEPD_BLACK);
}
#endif
display.drawInvertedBitmap(170, 204 + (48 + 8) * 0,
wi_sunset_48x48, 48, 48, GxEPD_BLACK);
display.drawInvertedBitmap(170, 204 + (48 + 8) * 1,
wi_humidity_48x48, 48, 48, GxEPD_BLACK);
display.drawInvertedBitmap(170, 204 + (48 + 8) * 2,
wi_barometer_48x48, 48, 48, GxEPD_BLACK);
#if defined(DISP_BW_V2) || defined(DISP_3C_B) || defined(DISP_7C_F)
display.drawInvertedBitmap(170, 204 + (48 + 8) * 3,
visibility_icon_48x48, 48, 48, GxEPD_BLACK);
display.drawInvertedBitmap(170, 204 + (48 + 8) * 4,
wi_raindrops_48x48, 48, 48, GxEPD_BLACK);
#endif
// current weather data labels
display.setFont(&FONT_7pt8b);
drawString(48, 204 + 10 + (48 + 8) * 0, TXT_SUNRISE, LEFT);
drawString(48, 204 + 10 + (48 + 8) * 1, TXT_WIND, LEFT);
drawString(48, 204 + 10 + (48 + 8) * 2, TXT_UV_INDEX, LEFT);
#if defined(DISP_BW_V2) || defined(DISP_3C_B) || defined(DISP_7C_F)
drawString(48, 204 + 10 + (48 + 8) * 3, TXT_AIR_QUALITY_INDEX, LEFT);
drawString(48, 204 + 10 + (48 + 8) * 4, "Moon Cycle", LEFT);
#endif
drawString(170 + 48, 204 + 10 + (48 + 8) * 0, TXT_SUNSET, LEFT);
drawString(170 + 48, 204 + 10 + (48 + 8) * 1, TXT_HUMIDITY, LEFT);
drawString(170 + 48, 204 + 10 + (48 + 8) * 2, TXT_PRESSURE, LEFT);
#if defined(DISP_BW_V2) || defined(DISP_3C_B) || defined(DISP_7C_F)
drawString(170 + 48, 204 + 10 + (48 + 8) * 3, TXT_VISIBILITY, LEFT);
drawString(170 + 48, 204 + 10 + (48 + 8) * 4, "Hourly Rain", LEFT);
#endif
// sunrise
display.setFont(&FONT_12pt8b);
char timeBuffer[12] = {}; // big enough to accommodate "hh:mm:ss am"
time_t ts = current.sunrise;
tm *timeInfo = localtime(&ts);
_strftime(timeBuffer, sizeof(timeBuffer), TIME_FORMAT, timeInfo);
drawString(48, 204 + 17 / 2 + (48 + 8) * 0 + 48 / 2, timeBuffer, LEFT);
// wind
#ifdef WIND_INDICATOR_ARROW
display.drawInvertedBitmap(48, 204 + 24 / 2 + (48 + 8) * 1,
getWindBitmap24(current.wind_deg),
24, 24, GxEPD_BLACK);
#endif
#ifdef UNITS_SPEED_METERSPERSECOND
dataStr = String(static_cast<int>(round(current.wind_speed)));
unitStr = TXT_UNITS_SPEED_METERSPERSECOND;
#endif
#ifdef UNITS_SPEED_FEETPERSECOND
dataStr = String(static_cast<int>(round(
meterspersecond_to_feetpersecond(current.wind_speed) )));
unitStr = TXT_UNITS_SPEED_FEETPERSECOND;
#endif
#ifdef UNITS_SPEED_KILOMETERSPERHOUR
dataStr = String(static_cast<int>(round(
meterspersecond_to_kilometersperhour(current.wind_speed) )));
unitStr = TXT_UNITS_SPEED_KILOMETERSPERHOUR;
#endif
#ifdef UNITS_SPEED_MILESPERHOUR
dataStr = String(static_cast<int>(round(
meterspersecond_to_milesperhour(current.wind_speed) )));
unitStr = TXT_UNITS_SPEED_MILESPERHOUR;
#endif
#ifdef UNITS_SPEED_KNOTS
dataStr = String(static_cast<int>(round(
meterspersecond_to_knots(current.wind_speed) )));
unitStr = TXT_UNITS_SPEED_KNOTS;
#endif
#ifdef UNITS_SPEED_BEAUFORT
dataStr = String(meterspersecond_to_beaufort(current.wind_speed));
unitStr = TXT_UNITS_SPEED_BEAUFORT;
#endif
#ifdef WIND_INDICATOR_ARROW
drawString(48 + 24, 204 + 17 / 2 + (48 + 8) * 1 + 48 / 2, dataStr, LEFT);
#else
drawString(48 , 204 + 17 / 2 + (48 + 8) * 1 + 48 / 2, dataStr, LEFT);
#endif
display.setFont(&FONT_8pt8b);
drawString(display.getCursorX(), 204 + 17 / 2 + (48 + 8) * 1 + 48 / 2,
unitStr, LEFT);
#if defined(WIND_INDICATOR_NUMBER)
dataStr = String(current.wind_deg) + "\xB0";
display.setFont(&FONT_12pt8b);
drawString(display.getCursorX() + 6, 204 + 17 / 2 + (48 + 8) * 1 + 48 / 2,
dataStr, LEFT);
#endif
#if defined(WIND_INDICATOR_CPN_CARDINAL) \
|| defined(WIND_INDICATOR_CPN_INTERCARDINAL) \
|| defined(WIND_INDICATOR_CPN_SECONDARY_INTERCARDINAL) \
|| defined(WIND_INDICATOR_CPN_TERTIARY_INTERCARDINAL)
dataStr = getCompassPointNotation(current.wind_deg);
display.setFont(&FONT_12pt8b);
drawString(display.getCursorX() + 6, 204 + 17 / 2 + (48 + 8) * 1 + 48 / 2,
dataStr, LEFT);
#endif
// uv and air quality indices
// spacing between end of index value and start of descriptor text
const int sp = 8;
// uv index
display.setFont(&FONT_12pt8b);
uint uvi = static_cast<uint>(std::max(round(current.uvi), 0.0f));
dataStr = String(uvi);
drawString(48, 204 + 17 / 2 + (48 + 8) * 2 + 48 / 2, dataStr, LEFT);
display.setFont(&FONT_7pt8b);
dataStr = String(getUVIdesc(uvi));
int max_w = 170 - (display.getCursorX() + sp);
if (getStringWidth(dataStr) <= max_w)
{ // Fits on a single line, draw along bottom
drawString(display.getCursorX() + sp, 204 + 17 / 2 + (48 + 8) * 2 + 48 / 2,
dataStr, LEFT);
}
else
{ // use smaller font
display.setFont(&FONT_5pt8b);
if (getStringWidth(dataStr) <= max_w)
{ // Fits on a single line with smaller font, draw along bottom
drawString(display.getCursorX() + sp,
204 + 17 / 2 + (48 + 8) * 2 + 48 / 2,
dataStr, LEFT);
}
else
{ // Does not fit on a single line, draw higher to allow room for 2nd line
drawMultiLnString(display.getCursorX() + sp,
204 + 17 / 2 + (48 + 8) * 2 + 48 / 2 - 10,
dataStr, LEFT, max_w, 2, 10);
}
}
#if defined(DISP_BW_V2) || defined(DISP_3C_B) || defined(DISP_7C_F)
// air quality index
display.setFont(&FONT_12pt8b);
int aqi = getAQI(owm_air_pollution);
dataStr = String(aqi);
drawString(48, 204 + 17 / 2 + (48 + 8) * 3 + 48 / 2, dataStr, LEFT);
display.setFont(&FONT_7pt8b);
dataStr = String(getAQIdesc(aqi));
max_w = 170 - (display.getCursorX() + sp);
if (getStringWidth(dataStr) <= max_w)
{ // Fits on a single line, draw along bottom
drawString(display.getCursorX() + sp, 204 + 17 / 2 + (48 + 8) * 3 + 48 / 2,
dataStr, LEFT);
}
else
{ // use smaller font
display.setFont(&FONT_5pt8b);
if (getStringWidth(dataStr) <= max_w)
{ // Fits on a single line with smaller font, draw along bottom
drawString(display.getCursorX() + sp,
204 + 17 / 2 + (48 + 8) * 3 + 48 / 2,
dataStr, LEFT);
}
else
{ // Does not fit on a single line, draw higher to allow room for 2nd line
drawMultiLnString(display.getCursorX() + sp,
204 + 17 / 2 + (48 + 8) * 3 + 48 / 2 - 10,
dataStr, LEFT, max_w, 2, 10);
}
}
// moon cycle
display.setFont(&FONT_12pt8b);
drawString(48, 204 + 17 / 2 + (48 + 8) * 4 + 48 / 2, getMoonPhase(moonPhase), LEFT);
#endif // defined(DISP_BW_V2) || defined(DISP_3C_B) || defined(DISP_7C_F)
// sunset
memset(timeBuffer, '\0', sizeof(timeBuffer));
ts = current.sunset;
timeInfo = localtime(&ts);
_strftime(timeBuffer, sizeof(timeBuffer), TIME_FORMAT, timeInfo);
drawString(170 + 48, 204 + 17 / 2 + (48 + 8) * 0 + 48 / 2, timeBuffer, LEFT);
// humidity
dataStr = String(current.humidity);
drawString(170 + 48, 204 + 17 / 2 + (48 + 8) * 1 + 48 / 2, dataStr, LEFT);
display.setFont(&FONT_8pt8b);
drawString(display.getCursorX(), 204 + 17 / 2 + (48 + 8) * 1 + 48 / 2,
"%", LEFT);
// pressure
#ifdef UNITS_PRES_HECTOPASCALS
dataStr = String(current.pressure);
unitStr = TXT_UNITS_PRES_HECTOPASCALS;
#endif
#ifdef UNITS_PRES_PASCALS
dataStr = String(static_cast<int>(round(
hectopascals_to_pascals(current.pressure) )));
unitStr = TXT_UNITS_PRES_PASCALS;
#endif
#ifdef UNITS_PRES_MILLIMETERSOFMERCURY
dataStr = String(static_cast<int>(round(
hectopascals_to_millimetersofmercury(current.pressure) )));
unitStr = TXT_UNITS_PRES_MILLIMETERSOFMERCURY;
#endif
#ifdef UNITS_PRES_INCHESOFMERCURY
dataStr = String(round(1e1f *
hectopascals_to_inchesofmercury(current.pressure)
) / 1e1f, 1);
unitStr = TXT_UNITS_PRES_INCHESOFMERCURY;
#endif
#ifdef UNITS_PRES_MILLIBARS
dataStr = String(static_cast<int>(round(
hectopascals_to_millibars(current.pressure) )));
unitStr = TXT_UNITS_PRES_MILLIBARS;
#endif
#ifdef UNITS_PRES_ATMOSPHERES
dataStr = String(round(1e3f *
hectopascals_to_atmospheres(current.pressure) )
/ 1e3f, 3);
unitStr = TXT_UNITS_PRES_ATMOSPHERES;
#endif
#ifdef UNITS_PRES_GRAMSPERSQUARECENTIMETER
dataStr = String(static_cast<int>(round(
hectopascals_to_gramspersquarecentimeter(current.pressure)
)));
unitStr = TXT_UNITS_PRES_GRAMSPERSQUARECENTIMETER;
#endif
#ifdef UNITS_PRES_POUNDSPERSQUAREINCH
dataStr = String(round(1e2f *
hectopascals_to_poundspersquareinch(current.pressure)
) / 1e2f, 2);
unitStr = TXT_UNITS_PRES_POUNDSPERSQUAREINCH;
#endif
display.setFont(&FONT_12pt8b);
drawString(170 + 48, 204 + 17 / 2 + (48 + 8) * 2 + 48 / 2, dataStr, LEFT);
display.setFont(&FONT_8pt8b);
drawString(display.getCursorX(), 204 + 17 / 2 + (48 + 8) * 2 + 48 / 2,
unitStr, LEFT);
#if defined(DISP_BW_V2) || defined(DISP_3C_B) || defined(DISP_7C_F)
// visibility
display.setFont(&FONT_12pt8b);
#ifdef UNITS_DIST_KILOMETERS
float vis = meters_to_kilometers(current.visibility);
unitStr = TXT_UNITS_DIST_KILOMETERS;
#endif
#ifdef UNITS_DIST_MILES
float vis = meters_to_miles(current.visibility);
unitStr = TXT_UNITS_DIST_MILES;
#endif
// if visibility is less than 1.95, round to 1 decimal place
// else round to int
if (vis < 1.95)
{
dataStr = String(round(10 * vis) / 10.0, 1);
}
else
{
dataStr = String(static_cast<int>(round(vis)));
}
#ifdef UNITS_DIST_KILOMETERS
if (vis >= 10) {
#endif
#ifdef UNITS_DIST_MILES
if (vis >= 6) {
#endif
dataStr = "> " + dataStr;
}
drawString(170 + 48, 204 + 17 / 2 + (48 + 8) * 3 + 48 / 2, dataStr, LEFT);
display.setFont(&FONT_8pt8b);
drawString(display.getCursorX(), 204 + 17 / 2 + (48 + 8) * 3 + 48 / 2,
unitStr, LEFT);
//rain volume per hour
display.setFont(&FONT_12pt8b);
dataStr = String(hourly.rain_1h, 1);
drawString(170 + 48, 204 + 17 / 2 + (48 + 8) * 4 + 48 / 2, dataStr, LEFT);
display.setFont(&FONT_8pt8b);
drawString(display.getCursorX(), 204 + 17 / 2 + (48 + 8) * 4 + 48 / 2,
"mm", LEFT);
#endif // defined(DISP_BW_V2) || defined(DISP_3C_B) || defined(DISP_7C_F)
return;
} // end drawCurrentConditions
/* This function is responsible for drawing the five day forecast.
*/
void drawForecast(owm_daily_t *const daily, tm timeInfo)
{
// 5 day, forecast
String hiStr, loStr;
for (int i = 0; i < 5; ++i)
{
#if defined(DISP_BW_V2) || defined(DISP_3C_B) || defined(DISP_7C_F)
int x = 398 + (i * 82);
#elif defined(DISP_BW_V1)
int x = 318 + (i * 64);
#endif
// icons
display.drawInvertedBitmap(x, 98 + 69 / 2 - 32 - 6,
getForecastBitmap64(daily[i]),
64, 64, GxEPD_BLACK);
// day of week label
display.setFont(&FONT_11pt8b);
char dayBuffer[8] = {};
_strftime(dayBuffer, sizeof(dayBuffer), "%a", &timeInfo); // abbrv'd day
drawString(x + 31 - 2, 98 + 69 / 2 - 32 - 26 - 6 + 16, dayBuffer, CENTER);
timeInfo.tm_wday = (timeInfo.tm_wday + 1) % 7; // increment to next day
// high | low
display.setFont(&FONT_8pt8b);
drawString(x + 31, 98 + 69 / 2 + 38 - 6 + 12, "|", CENTER);
#ifdef UNITS_TEMP_KELVIN
hiStr = String(static_cast<int>(round(daily[i].temp.max)));
loStr = String(static_cast<int>(round(daily[i].temp.min)));
#endif
#ifdef UNITS_TEMP_CELSIUS
hiStr = String(static_cast<int>(round(kelvin_to_celsius(daily[i].temp.max)
))) + "\xB0";
loStr = String(static_cast<int>(round(kelvin_to_celsius(daily[i].temp.min)
))) + "\xB0";
#endif
#ifdef UNITS_TEMP_FAHRENHEIT
hiStr = String(static_cast<int>(round(kelvin_to_fahrenheit(daily[i].temp.max)
))) + "\xB0";
loStr = String(static_cast<int>(round(kelvin_to_fahrenheit(daily[i].temp.min)
))) + "\xB0";
#endif
drawString(x + 31 - 4, 98 + 69 / 2 + 38 - 6 + 12, hiStr, RIGHT);
drawString(x + 31 + 5, 98 + 69 / 2 + 38 - 6 + 12, loStr, LEFT);
}
return;
} // end drawForecast