Hi all,

my TTGO Mini32 is sporadically freezing after it's woke up from deep sleep. The last print on serial console is, that WiFi connection was established.

I was able to trace down, that function call display.init() from InitialiseDisplay() sometimes never return.

I added some trace prints to GxEPD2 library and it looks like GxEPD2 is trying to initialize serial port if the first argument of display.init() is greater than 0. And this Serial.begin() inside of GxEPD2 sometimes never return.

I don't see any reason, why another Serial.begin() should hang ESP32, but there is a probably a bug in esp32-arduino or ESP SDK. I'm using version 1.0.4 of esp32-arduino.

So, after I've change code to:

display.init(0);

and my ESP32 started running stable.

What do you think about this modification?

Thank you,
Roman

I use the Waveshare 7,5" e-Paper Display with e-Paper HAT (SPI) as Interface to the ESP32 and the software package ESP32-e-Paper-Weather-Display/German/ changed by me.

At the beginning I have a very good black and white contrast. After a few days, the contrast will always be less and less until it's still "white".
I changed the e-Paper Display and e-Paper HAT interface PCB, but the result was the same thing.

If I switch off for same days and switch on I've also a very good black and white contrast. After a few days, the contras

t will always be less and less

Any idea's what could be the reason for this problem?

Hi David,
I didn't dig yet into OWM json or your Arduino code, but as you can see in the attached picture the numeric temperature forecast (+9°|-4°) does not match the graph below, which shows circa +7°|+3° .
Also, the rainfall graph at bottom doesn't show the rain now (10:30) expected for the next 3 hours on top (12:00).
Is this intentional? Did I miss something?
Thank you,
Piero

Hello,

is it possible to use an ESP8266 instead of an ESP32? I ask because there is an ESP8266 E-Paper Driver Board from Waveshare and this would be perfect for use with the 7.5" Display.

Which changes must be do on the code to run it on the ESP8266?

I changed #include <Wifi.h> to #include <ESP8266Wifi.h> and commend out the lines

esp_sleep_enable_timer_wakeup(UpdateInterval);

and

esp_deep_sleep_start(); // Sleep for e.g. 30 minutes

also the function UpdateLocalTime();

void UpdateLocalTime() {
 struct tm timeinfo;
  while (!getLocalTime(&timeinfo)) {
    Serial.println(F("Failed to obtain time"));
  }
  //See http://www.cplusplus.com/reference/ctime/strftime/
  //Serial.println(&timeinfo, "%a %b %d %Y   %H:%M:%S");      // Displays: Saturday, June 24 2017 14:05:49
  Serial.println(&timeinfo, "%H:%M:%S");                      // Displays: 14:05:49
  char output[30], day_output[30];
  if (Units == "M") {
    strftime(day_output, 30, "%a  %d-%b-%y", &timeinfo);      // Displays: Sat 24/Jun/17
    strftime(output, 30, "( Updated: %H:%M:%S )", &timeinfo); // Creates: '@ 14:05:49'
  }
  else {
    strftime(day_output, 30, "%a  %b-%d-%y", &timeinfo);      // Creates: Sat Jun/24/17
    strftime(output, 30, "( Updated: %r )", &timeinfo);       // Creates: '@ 2:05:49pm'
  }
  Day_time_str = day_output;
  time_str     = output;
}

and the call of the function:

UpdateLocalTime();

Pin- Setting changed to:

static const uint8_t EPD_BUSY = 16;
static const uint8_t EPD_SS   = 15;
static const uint8_t EPD_RST  = 5;
static const uint8_t EPD_DC   = 4;
static const uint8_t EPD_SCK  = 18;
static const uint8_t EPD_MISO = 19; // Master-In Slave-Out not used, as no data from display
static const uint8_t EPD_MOSI = 23;

The Display is updating but without any data...

I would be nice if anyone can help me to get it working!

Thanks a lot, Regards

Darkmelman

I downloaded the last release of ESP32_OWM_Current_Forecast_75_epaper_v11 and get a connection lost.
It works without a "connection lost" >> with an older release of ..._75_epaper_v11 >> downloaded 30-May-2019

output serial monitor.
Connecting to: WLAN_xxxxxx
[D][WiFiGeneric.cpp:342] _eventCallback(): Event: 0 - WIFI_READY
[D][WiFiGeneric.cpp:342] _eventCallback(): Event: 2 - STA_START
.[D][WiFiGeneric.cpp:342] _eventCallback(): Event: 4 - STA_CONNECTED
[D][WiFiGeneric.cpp:342] _eventCallback(): Event: 7 - STA_GOT_IP
[D][WiFiGeneric.cpp:385] _eventCallback(): STA IP: 192.168.xxx.xxx, MASK: 255.255.255.0, GW: 192.168.xxx.1
.WiFi connected at: 2365630656
19Creating object...and Decoding weather data
13.72
52.56
Clear
Klarer Himmel
01d

30.89
1007.00
33.00
28.89
32.22
6.70
90.00
0
10000
DE
1559702731
1559762513
connection failed, error: connection lost
_PowerOff : 3
Awake for : 6911mS
Starting deep-sleep period...

'esp_sleep_enable_timer_wakeup' was not declared in this scope:

/Users/Juergen-S/Desktop/ESP32-e-Paper-Weather-Display/ESP32-e-Paper-Weather-Display.ino: In function 'void setup()':
ESP32-e-Paper-Weather-Display:127: error: 'esp_sleep_enable_timer_wakeup' was not declared in this scope
esp_sleep_enable_timer_wakeup(UpdateInterval);

Waveshare have a rather nice driver board:
https://www.waveshare.com/wiki/E-Paper_ESP32_Driver_Board

So I've got one of those and their 7.5 mono display. They have demos code that allows sending an image to the display using a web browser and I've ran that and it works fine, so the board and connections are good.

The Weather Display code does nothing though. I've got the pin assignments set to the same values as their demo code, the output in the serial console seems fine (gets the data from web service, calls update screen code) but no data is reaching the screen.

Any ideas on the cause or how I can investigate?
Thanks.

[EDIT: Changed first line to clarify the driver-board hardware, not software driver]

hello
cant find the ESP8266 WeatherStation' by Daniel Eichhorn library

Hello G6EJD,
with the current Waveshare_4_2 V11 sketch I get an compiler error.

Waveshare_4_2:268:50: error: 'Sunrise' was not declared in this scope
Waveshare_4_2:269:50: error: 'Sunset' was not declared in this scope

after declaration of Sunrise, Sunset as int
int wifisection, displaysection, Sunrise, Sunset;
the displayed values are 01:00.

The current procedure for updates to this library is to copy one of the example directories, change the version number and ultimately delete the old example files.
This approach is pretty unique to this repo and comes with a couple a drawbacks, namely:

• The current version strings have no meaning, and are even not consistent over the different display sizes (e.g. v11 of 7.5" has no connection to v11 of 4.2")
• Updates to the "core" library don't result in a new version bump, so the date of download is highly relevant.
• It is unclear which old versions can be considered outdated, which need to be maintained and which can be deleted.
• There is no usable git history of the files.
• The user cannot simply choose his/her display size but also needs to choose among different versions, which have no meaning and the latest is always considered best anyways.
• and so on...

I opened this issue to start a discussion on how a better release management could look like and to hear what is important to you.

Hello 👋

Do you plan to support the 12.48” ePaper displays from Waveshare too?

https://www.waveshare.com/product/displays/e-paper/12.48inch-e-paper-module.htm
https://www.waveshare.com/product/displays/e-paper/12.48inch-e-paper-b.htm
https://www.waveshare.com/product/displays/e-paper/12.48inch-e-paper.htm

Thanks for your reply in advance. 😊

Kind regards
AWSW

The Time is hardcodet for your local country,
setenv("TZ","GMT0BST,M3.5.0/01,M10.5.0/02", 1);
Please can you add some other, btw: MET-1METDST ?

My city name is shared thus making getting valid results is often a challenge. As stated in your notes in the owm_credentials "Takes the first result for a city name. choose wisely. "

I amended the owm_credentials.h to add
String CityID = "xxxxxxx";

I amended the common.h line 114 from

String uri = "/data/2.5/" + RequestType + "?q=" + City + "," + Country + "&APPID=" + apikey + "&mode=json&units=" + units + "&lang=" + Language;

to

String uri = "/data/2.5/" + RequestType + "?id=" + CityID + "&APPID=" + apikey + "&mode=json&units=" + units + "&lang=" + Language;

This produces results for only the city weather station that I want. There is no longer any gess work or choosing wisely :)

OWM recommends this method also
"We recommend to call API by city ID to get unambiguous result for your city."
Get your OpenWeatherMap City ID
Go to www.openweathermap.org.
Type the nearest city or town name into the Search field and click the Search button.
Locate your city in the search results, and click on its name.
The City ID can be found in your browser's address bar.
example https://openweathermap.org/city/2642786

Hello, I've been hunting and pecking around and found a typo in Waveshare_7_5.ino. The tri color displays will not work. Line 60 is missing a couple of c's.

Consider changing GxEPD2_3C<GxEPD2_750, GxEPD2_750:: to GxEPD2_3C<GxEPD2_750c, GxEPD2_750c::

This was found by looking at the GxEPD2_example line 137

Enjoy your evening

I am wondering if your project can work on my new 7.5 inch e ink display with waveshare esp32 board.plz help me.

I'm having issues compiling for Waveshare 7.5" color display using PlatformIO. The compilation fails with the below message:

|-- <WiFi> 1.0
|-- <Wire> 1.0.1
Building in release mode
Compiling .pio/build/esp32dev/src/main.cpp.o
Linking .pio/build/esp32dev/firmware.elf
/home/ristomatti/.platformio/packages/toolchain-xtensa32/bin/../lib/gcc/xtensa-esp32-elf/5.2.0/../../../../xtensa-esp32-elf/bin/ld: .pio/build/esp32dev/firmware.elf section `.dram0.bss' will not fit in region `dram0_0_seg'
/home/ristomatti/.platformio/packages/toolchain-xtensa32/bin/../lib/gcc/xtensa-esp32-elf/5.2.0/../../../../xtensa-esp32-elf/bin/ld: DRAM segment data does not fit.
/home/ristomatti/.platformio/packages/toolchain-xtensa32/bin/../lib/gcc/xtensa-esp32-elf/5.2.0/../../../../xtensa-esp32-elf/bin/ld: region `dram0_0_seg' overflowed by 17200 bytes
collect2: error: ld returned 1 exit status
*** [.pio/build/esp32dev/firmware.elf] Error 1
========================================== [FAILED] Took 7.75 seconds ==========================================

So it appears the code doesn't fit to DRAM. Any tips on reducing the memory consumption?

I was able to compile it with #include <GxEPD2_BW.h> and using the GxEPD2_3C<GxEPD2_750c_Z08, GxEPD2_750c_Z08::HEIGHT> display constructor. However using the graphics/text end up being dim red. When the screen refreshes it goes through a nice crisp black which it then replaces with dark red and eventually a pale red color.

To compile I have done the following changes:

1. Added library dependencies to platformio.ini:

lib_deps =
  [email protected]
  [email protected]
  [email protected]
  https://github.com/G6EJD/ESP32-e-Paper-Weather-Display.git

2. Added forward declarations to functions (PIO compiles as .cpp)

3. Included GxEPD2_3C.h:

// #include <GxEPD2_BW.h>
#include <GxEPD2_3C.h>

4. Changed display initialization:

// GxEPD2_BW<GxEPD2_750_T7, GxEPD2_750_T7::HEIGHT> display(GxEPD2_750_T7(/*CS=*/ EPD_CS, /*DC=*/ EPD_DC, /*RST=*/ EPD_RST, /*BUSY=*/ EPD_BUSY));   // B/W display
GxEPD2_3C<GxEPD2_750c_Z08, GxEPD2_750c_Z08::HEIGHT> display(GxEPD2_750c_Z08(/*CS=*/ EPD_CS, /*DC=*/ EPD_DC, /*RST=*/ EPD_RST, /*BUSY=*/ EPD_BUSY)); // 3-colour displays

Hello,
i use your V16.3 Waveshare_7_5 and get this error: (an 1 year old Version is running)

Connecting to: FRITZ2
WiFi connected at: 192.168.8.110
Failed to obtain time
Entering 1800-secs of sleep time
Awake for : 9.110-secs
Starting deep-sleep period...

Please can you tell me, what's wrong?

hi,G6EJD.How to modify the font size. I found that the content I displayed was different from the font size of your screen display. Thank you

Hello,
compiling your code gave the following errors.
Pleas can you help me?
BR
Juergen

In file included from /Users/Juergen-S/Desktop/ESP32-e-Paper-Weather-Display/ESP32-e-Paper-Weather-Display.ino:20:0:
credentials.h:13: error: stray '\302' in program
const char * host    = "api.wunderground.com";
^
credentials.h:13: error: stray '\240' in program
credentials.h:13: error: stray '\302' in program
credentials.h:13: error: stray '\240' in program
credentials.h:13: error: stray '\302' in program
credentials.h:13: error: stray '\240' in program
credentials.h:14: error: stray '\302' in program
String      City    = "Kassel";             // Your home city
^
credentials.h:14: error: stray '\240' in program
credentials.h:14: error: stray '\302' in program
credentials.h:14: error: stray '\240' in program
credentials.h:14: error: stray '\302' in program
...
...
..

Hi,

I've used your code to write a weather station that does not only display the forecast, but also prints some data from (homemade) temp/humidity sensors. Most of the code is pretty specific, but I think one piece of code you might be interested in is an updated graph-drawing method.

Improvements:

• Allow multiple datasets per graph (one struct reading per dataset)
• Allow to set color per dataset (reading.color)
• Show midnight-spacers (the small lines coming from the bottom into the graph)
• Print the actual date on the bottom (instead of 0, 1, 2). bool historicalData can be set to print dates from the past.
• Make the dotted lines finer

Since the integration of this changes need some changes on the calling functions, I don't want to simply open a pull request. I put the code there: https://gist.github.com/charno/cc8dcf5443a5760c63d0384358b395b4

Best regards
Christof

.

Specifically BUSY is drawn to pin 19, but is coded to use pin 4

hello
i followed your instructions.
after compiling ..
Error compiling for board ESP32 Dev Module

I have my Weather station running perfectly now on the 4.2in display and a custom ESP32 board.
While its not missed a beat since I got it working, I have now noticed some odd behaviour and was wondering if anyone else has the same..
I've noticed on the hour that the first refresh will run at for example 11:59:30 and then the refresh will run again at 12:00:05. While this isn't a problem for the use of the device, it must be using extra power and resource ?
Thanks for a great project, loving having it on my desk especially while having to work from home !

Paul
G1ROK

...the display shows only "Getting data from Weather Onderground". Nothing more...

.....WiFi connected at: 1286777024
17:04:19
Connecting to api.wunderground.com
Requesting URL: http://api.wunderground.com/api/b3d60ab21601c97e/conditions/q/DE/Kassel.json
Receiving API weather data.................
Closing connection
Bytes received: 981
Creating object...
Connecting to api.wunderground.com
Requesting URL: http://api.wunderground.com/api/b3d60ab21601c97e/forecast/astronomy/q/DE/Kassel.json
Receiving API weather data.................
Closing connection
Bytes received: 1000
Creating object...

Not had a chace to have a good look but im getting this error.

"no matching function for call to 'GxEPD2_BW<GxEPD2_420, 300u>::getTextBounds(String&, int&, int&, int16_t*, int16_t*, uint16_t*, uint16_t*)'"

Im using the 4.2 Waveshare display version

Error until compiling:
Waveshare_4_2:889:42: error: 'EPD_CS' was not declared in this scope
SPI.begin(EPD_SCK, EPD_MISO, EPD_MOSI, EPD_CS);

in line 40 you wrote:
static const uint8_t EPD_SS = 5; // to EPD CS
ist must be:
static const uint8_t EPD_CS = 5; // to EPD CS

Serial.println("WiFi connected at: " + String(WiFi.localIP()));
create the following output
WiFi connected at: 2365630656

you could use the following line

`Serial.printf("\r\nWiFi connected at: %s\n", WiFi.localIP().toString().c_str());`    

WiFi connected at: 192.168.0.141

Good evening Dave,

I'm currently using your Streaming V1 ino and i'm having issues with displaying the correct battery voltage. When the default ino file is loaded there isn't any battery reading at all even when my battery voltage is reading 4.03v. At times it will read the battery and will only show 0.15V on the screen as I changed the if (voltage >1) to 0.000. The battery i'm currently using is a 3.7v 10000mAh.

Great project, thank you!
It seems as if, in the last commit, you forgot to commit forecast_record.h, because it is missing when i clone & try to compile the project.

Greetings from Berlin!

Hello,
i use your newest V16.4 and have problems to connect. 16.3 works correct.
It runs on a TTGO ESP32-WROVER.

ets_ Jun 8 2016 00:22:57
rst:0x10 (RTCWDT_RTC_RESET),boot:0x33 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0018,len:4
load:0x3fff001c,len:1100
load:0x40078000,len:9232
load:0x40080400,len:6400
entry 0x400806a8
Connecting to: FRITZ2
WiFi connected at: 192.168.8.102
Busy Timeout!
Entering 157-secs of sleep time
Awake for : 19.987-secs
Starting deep-sleep _period...

and here:
....
Icon name: 04n
Icon name: 04d
Voltage = 4.17
Busy Timeout!
_PowerOn : 10001028
Busy Timeout!
_Update_Full : 10001015
Busy Timeout!
_PowerOff : 10001015
Entering 860-secs of sleep time
Awake for : 41.301-secs
Starting deep-sleep period...

"api.wunderground.com" is defined twice, in the main and in credential.h

ESP32-e-Paper-Weather-Display:90: error: redefinition of 'const char* host'
const char* host = "api.wunderground.com";
^
In file included from /Users/Juergen-S/Desktop/ESP32-e-Paper-Weather-Display/ESP32-e-Paper-Weather-Display.ino:22:0:
sketch/credentials.h:13:13: note: 'const char* host' previously defined here
const char* host = "api.wunderground.com";

Hello,
i get this errors on compiling. ArdoinoJon 6.0.1.a is installed.
Please, can you help?
BR
Juergen
PS: with ESP32_OWM_Current_Forecast_29_epaper_v7 i have the same errors!

ESP32_WU_Current_Forecast_29_epaper_v5a:351: error: 'DynamicJsonBuffer' was not declared in this scope
DynamicJsonBuffer jsonBuffer(101024);
^
ESP32_WU_Current_Forecast_29_epaper_v5a:420: error: 'DynamicJsonBuffer' was not declared in this scope
DynamicJsonBuffer jsonBuffer(131024);
^
exit status 1
'DynamicJsonBuffer' was not declared in this scope

Hello,
You forgot a curly brace in your library:

C:\Dummy\Arduino\portable\sketchbook\libraries\ESP32-e-Paper-Weather-Display-master\src/lang_gr.h:73:78: error: expected '}' before ';' token

const char* weekday_D[] = { "So.", "Mo.", "Di.", "Mi.", "Do.", "Fr.", "Sa." ;

On the serial monitor I've seen a faw WiFi - authentication failure.
For testing I reduced the sketch - and changed the deep sleep mechanism

• wakeup every minute (later for a BME280 extension) and every 30 min download of OWM - data.

Sketch:
WakeUpTimer_WLAN.zip

The StartWiFi() produce a lot of ...
_eventCallback(): Event: 5 - STA_DISCONNECTED
_eventCallback(): Reason: 202 - AUTH_FAIL.

I've tested with different boards, but get the same "AUTH_FAIL".
- NodeMCU ESP32
- HIMALAYA ESP32 Dev Board
- Universal e-Paper Raw Panel Driver Board, ESP32.

Monitor output:
Monitor output.zip

The project looks great, I'm hovering over a "Buy" button on a 7.5" display :)
Before buying the mono display, The "color" ones, yellow or red commonly, look interesting. I know they are horribly slow, but it may be worth it depending on the results.

Is this project really to support a third color in any way, or should I just get the mono display ?

Also, does it handle partial-refresh at all?

Many thanks, I'm going to continue browsing the code trying to get a handle on it.

Waveshare updated the 7.5" inch e-Paper from 640x384 pixels to 800x480. The current code does not work for this version. Changing:

GxEPD2_BW<GxEPD2_750, GxEPD2_750::HEIGHT> display(GxEPD2_750(/*CS=*/ EPD_CS, /*DC=*/ EPD_DC, /*RST=*/ EPD_RST, /*BUSY=*/ EPD_BUSY)); // B/W display
to
GxEPD2_BW<GxEPD2_750_T7, GxEPD2_750_T7::HEIGHT> display(GxEPD2_750_T7(/*CS=*/ EPD_CS, /*DC=*/ EPD_DC, /*RST=*/ EPD_RST, /*BUSY=*/ EPD_BUSY)); // B/W display
makes it works, but does not use the extra pixels. Is seems all the dimensions are hard coded.

https://raw.githubusercontent.com/G6EJD/ESP32-e-Paper-Weather-Display/master/Schematic.jpg

The diagram shows ESP pin 19 connected to ePaper busy. The table also says 19. The text on the left however shows pin 4 for busy and 19 as not used.

https://raw.githubusercontent.com/G6EJD/ESP32-e-Paper-Weather-Display/master/Lolin32_Wiring.JPG
and
https://raw.githubusercontent.com/G6EJD/ESP32-e-Paper-Weather-Display/master/Lolin32_Lite_Wiring.JPG

Both use pin 4 for busy.

Please fix Schematic or remove it in favour of the both Lolin32 jpg's.

Hello G6EJD,

first of all: Thank you very much for this project and all the hard work you put into it. :)

I updated yesterday from v8 to v13 and found some minor issues which I like to report to you, just to let you know:

• The "owm_credentials.h" file was missing in the v13 folder, so I put it there from v12. Maybe it would be good to store this in the src-folder where the rest of the common files are?

• The file "ESP32_OWM_Current_Forecast_75_epaper_v13.ino" contains the wifi settings as "ssid" and "password". The "owm_credentials.h" file contains them as "ssid1" and "password1". So a small change here to perform.

• I could not find the file "lang_gr.h" for localization into German, so I will put you mine here, if you like to overtake it? I am still searching for the replacement chars to support the in German often used umlauts like "ä, ü, ö, ß". Actually I used "ae, ue, oe, ss" instead for now.
  lang_gr.h.zip

• If you don't mind I would like to integrate my improved version of this IOT installation method to add the wifi credentials on first startup called Basecamp. Link: https://github.com/merlinschumacher/Basecamp
  I used and enhanced it for some other projects I use in the below showed frames. I want to give these frames away for some friends and family as present and then they can setup their wifi connection on first startup themselves. ;)
  If you like I can give it a shot and you have a look afterwards if you like it of not?

Also I have a little question: Why is the condition text mixed as "Clear (Klarer Himmel)". I think this comes from open weather map data and is not translated there, right? I set all settings to "DE" in the "owm_credentials.h" file...

Thanks a lot and have a nice day. :) 8)

AWSW

In the DisplayForecastTextSection function you use for WxConditions the toLowerCase() function.

e.g. the OWM download for WxConditions "Klarer Himmel" (if String Language = "DE";) that is correct and Himmel have a uppercase letter.

You know, there are ePaper-displays with different resolutions.
It would be nice, to modify your code independent the resolution.
gfx.drawLine(0,77,296,77); --> High=384; With=640`; gfx.drawLine(0,(High / 100*77), (With / 100*296), (High/100*77));**

Hi,

I wanted to flash my SBC-NodeMCU-ESP32 and get the error GxEPD2_BW.h: No such file or directory
Heres the error message:

Arduino: 1.8.10 (Windows 10), Board: "DOIT ESP32 DEVKIT V1, 80MHz, 921600, None"

Waveshare_4_2:43:23: error: GxEPD2_BW.h: No such file or directory

Multiple libraries were found for "Carousel.h"
compilation terminated.

Used: C:\Users\B0IIE\Documents\Arduino\libraries\minigrafx-master
Multiple libraries were found for "FS.h"
Used: C:\Users\B0IIE\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.4\libraries\FS
Multiple libraries were found for "SPIFFS.h"
Used: C:\Users\B0IIE\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.4\libraries\SPIFFS
Multiple libraries were found for "SPI.h"
Used: C:\Users\B0IIE\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.4\libraries\SPI
Multiple libraries were found for "ArduinoJson.h"
Used: C:\Users\B0IIE\Documents\Arduino\libraries\ArduinoJson-6.x
Multiple libraries were found for "WiFi.h"
Used: C:\Users\B0IIE\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.4\libraries\WiFi
Not used: e:\Arduino\libraries\WiFi
exit status 1
GxEPD2_BW.h: No such file or directory

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

What am I missing / doing wrong?

The GxEPD2 (or GxEPD2_32) library support U8g2 font use. List of standard ones:
https://github.com/olikraus/u8g2/wiki/fntlistall

Right the way down to 4 pixels.
Not been able to check for a degree symbol at the moment, due to breaking the driver board for the screen while removing the factory installed pin headers :/

Possibly this library may provide other benefits?
I do have a (most times) working 2.9" display, and testing it with GxEDP2_32 seemed to provide very fast screen updates, perhaps three frames per second.

The formatting of the wind direction and speed isn't realy ok:

hello,
i get an error when compiling :
Waveshare_7_5.ino: 92:44: error: 'alignment' has not been declared
Waveshare_7_5.ino: 93:77: error: 'alignment' has not been declared

but when i edit around the line 92 i find this code :

#define max_readings 24  // line 88
 //89
Forecast_record_type  WxConditions[1];   // 90
Forecast_record_type  WxForecast[max_readings]; //91
                 //92
#include "common.h"    //93
                                   //94
#define autoscale_on  true
#define autoscale_off false
#define barchart_on   true
#define barchart_off  false

and the alignment enum is declared at line 42

enum alignment {LEFT, RIGHT,CENTER};

please some help...

Hello, I'm trying to compile for the LolinD32. Error is --- no matching function for call to 'GxEPD2_3C<GxEPD2_750, 384u>::getTextBounds(String&, int&, int&, int16_t*, int16_t*, uint16_t*, uint16_t*)'

Any ideas??? It's 2am and I'm fresh out of brain.

I have donwloaded the .zip, installed the library and while compiling there are errors of variables "not declared in scope". I´ve tried to fix it but I do not know the type of variables they are.

Error for Waveshare_2_9.ino:

Waveshare_2_9:398:3: error: 'CurrentHour' was not declared in this scope
CurrentHour = timeinfo.tm_hour;
^
Waveshare_2_9:399:3: error: 'CurrentMin' was not declared in this scope
CurrentMin = timeinfo.tm_min;
^
Waveshare_2_9:400:3: error: 'CurrentSec' was not declared in this scope
CurrentSec = timeinfo.tm_sec;
^
Waveshare_2_9:406:48: error: 'weekday_D' was not declared in this scope
sprintf(day_output, "%s, %02u. %s %04u", weekday_D[timeinfo.tm_wday], timeinfo.tm_mday, month_M[timeinfo.tm_mon], (timeinfo.tm_year) + 1900); // day_output >> So., 23. Juni 2019 <<
^
Waveshare_2_9:406:95: error: 'month_M' was not declared in this scope
sprintf(day_output, "%s, %02u. %s %04u", weekday_D[timeinfo.tm_wday], timeinfo.tm_mday, month_M[timeinfo.tm_mon], (timeinfo.tm_year) + 1900); // day_output >> So., 23. Juni 2019 <<
^
Waveshare_2_9:410:46: error: 'weekday_D' was not declared in this scope
sprintf(day_output, "%s %02u-%s-%04u", weekday_D[timeinfo.tm_wday], timeinfo.tm_mday, month_M[timeinfo.tm_mon], (timeinfo.tm_year) + 1900);
^
Waveshare_2_9:410:93: error: 'month_M' was not declared in this scope
sprintf(day_output, "%s %02u-%s-%04u", weekday_D[timeinfo.tm_wday], timeinfo.tm_mday, month_M[timeinfo.tm_mon], (timeinfo.tm_year) + 1900);
^
Waveshare_2_9:413:35: error: 'TXT_UPDATED' was not declared in this scope
sprintf(time_output, "%s %s", TXT_UPDATED, update_time);
^
Waveshare_2_9:419:35: error: 'TXT_UPDATED' was not declared in this scope
sprintf(time_output, "%s %s", TXT_UPDATED, update_time);
^
Waveshare_2_9:421:3: error: 'date_str' was not declared in this scope
date_str = day_output;
^

Hi G6EJD !!

Thank you for your amazing work !!
I've got an issue with the forecasted weather... My graphs stay empty as hourly forecast:

Do you have a solution for this ?

Thank you !!

Hi,

there is an accidentally committed Waveshare_7_5.ino.ino, I could clean that up, but in this case a rebase and force push would probably the better option.
Simply renaming and overwriting the .ino will delete my changes.

If you need help, you could also give me force-push rights for master for an hour or two.

Line 75 of Waveshare_7_5 Example missing "

IS:

//################ VERSION ###########################################
String version = "16.7; // Programme version, see change log at end
//################ VARIABLES ###########################################

SHOULD BE:

//################ VERSION ###########################################
String version = "16.7"; // Programme version, see change log at end
//################ VARIABLES ###########################################

FYI, love the project! Thank you.

--Matt