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G6EJD / ESP32-e-Paper-Weather-Display

An ESP32 and 2.9", 4.2" or 7.5" ePaper Display reads Weather Underground data via their API and then displays the weather
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Wemos lolin 32+lipo 3,7v 2000mah battery #225

Closed maik104 closed 10 months ago

maik104 commented 10 months ago

Hello, is it possible in the 1.54 code: instead of displaying the battery sign and the percentage of the battery in the string version? Thanks

G6EJD commented 10 months ago

Yes it can be done, but first you need to make battery percent a global variable so it can be used anywhere

maik104 commented 10 months ago

Hello, I have already added this: void drawBattery(int x, int y) { uint8_t percentage = 100; float voltage = analogRead(35) / 4096.0 7.46; if (voltage > 1 ) { // Only display if there is a valid reading Serial.println("Voltage = " + String(voltage)); percentage = 2836.9625 pow(voltage, 4) - 43987.4889 pow(voltage, 3) + 255233.8134 pow(voltage, 2) - 656689.7123 voltage + 632041.7303; if (voltage >= 4.20) percentage = 100; if (voltage <= 3.50) percentage = 0; display.drawRect(x + 15, y - 12, 19, 10, GxEPD_BLACK); display.fillRect(x + 34, y - 10, 2, 5, GxEPD_BLACK); display.fillRect(x + 17, y - 10, 15 percentage / 100.0, 6, GxEPD_BLACK); drawString(x + 60, y - 11, String(percentage) + "%", RIGHT); //drawString(x + 13, y + 5, String(voltage, 2) + "v", CENTER); } }

maik104 commented 10 months ago

and this: void DisplayHeadingSection() { u8g2Fonts.setFont(u8g2_font_helvB08_tf); drawString(2, 2, Time_str, LEFT); drawString(SCREEN_WIDTH - 2, 0, Date_str, RIGHT); drawBattery(2, 0, CENTER); //drawString(SCREEN_WIDTH / 2, 0, version, CENTER); display.drawLine(0, 12, SCREEN_WIDTH, 12, GxEPD_BLACK); } but fail: Compilation error: too many arguments to function 'void drawBattery(int, int)'

G6EJD commented 10 months ago

You added too many arguments to the call here: drawBattery(2, 0, CENTER); should be: drawBattery(2, 0);