I set the SSD1306_SetVFlip and SSD1306_SetHFlip to flip the screen content, whereas standard, everything seems upside-down. The SSD1306_SetHFlip works fine but the SSD1306_SetVFlip does not flip vertically. Any Ideas?

Using ESP-IDF v4.0 and the HelloWorld tarablessd1306_examples component

When compiling and using the example HelloWorld, the text displays fine however it is turning on other random pixels which are not present when using the Arduinolibraries

I tried installation of your product.
But an error occurred by a build.

git clone --recursive https://github.com/TaraHoleInIt/tarablessd1306_examples

cd tarablessd1306_examples/

cd HelloWorld/

rm sdkconfig.*

make menuconfig

make

Generating esp32.project.ld
LD build/tarablessd1306_helloworld.elf
/home/robotics/tarablessd1306_examples/HelloWorld/build/main/libmain.a(main.o):(.literal.DefaultBusInit+0x20): undefined reference to `SSD1306_I2CMasterInitDefault'
/home/robotics/tarablessd1306_examples/HelloWorld/build/main/libmain.a(main.o):(.literal.DefaultBusInit+0x24): undefined reference to `SSD1306_I2CMasterAttachDisplayDefault'
/home/robotics/tarablessd1306_examples/HelloWorld/build/main/libmain.a(main.o):(.literal.DefaultBusInit+0x28): undefined reference to `SSD1306_SPIMasterInitDefault'
/home/robotics/tarablessd1306_examples/HelloWorld/build/main/libmain.a(main.o):(.literal.DefaultBusInit+0x2c): undefined reference to `SSD1306_SPIMasterAttachDisplayDefault'
/home/robotics/tarablessd1306_examples/HelloWorld/build/main/libmain.a(main.o): In function `DefaultBusInit':
/home/robotics/tarablessd1306_examples/HelloWorld/main/main.c:42: undefined reference to `SSD1306_I2CMasterInitDefault'
/home/robotics/tarablessd1306_examples/HelloWorld/main/main.c:43: undefined reference to `SSD1306_I2CMasterAttachDisplayDefault'
/home/robotics/tarablessd1306_examples/HelloWorld/main/main.c:43: undefined reference to `SSD1306_SPIMasterInitDefault'
/home/robotics/tarablessd1306_examples/HelloWorld/main/main.c:48: undefined reference to `SSD1306_SPIMasterAttachDisplayDefault'
collect2: error: ld returned 1 exit status
/home/robotics/esp-idf/make/project.mk:517: recipe for target '/home/robotics/tarablessd1306_examples/HelloWorld/build/tarablessd1306_helloworld.elf' failed
make: *** [/home/robotics/tarablessd1306_examples/HelloWorld/build/tarablessd1306_helloworld.elf] Error 1

There is default_if_i2c.c.

$ grep -r SSD1306_I2CMasterInitDefault *
components/tarablessd1306/ifaces/default_if_i2c.c:bool SSD1306_I2CMasterInitDefault( void ) {
components/tarablessd1306/ssd1306_default_if.h:bool SSD1306_I2CMasterInitDefault( void );
main/main.c:        assert( SSD1306_I2CMasterInitDefault( ) == true );

archive is:

/tarablessd1306_examples/HelloWorld/build/tarablessd1306$ ar tv libtarablessd1306.a
rw-rw-r-- 1000/1000  50236 Apr 18 11:25 2019 ssd1306_font.o
rw-rw-r-- 1000/1000  55712 Apr 18 11:25 2019 ssd1306.o
rw-rw-r-- 1000/1000  36044 Apr 18 11:25 2019 ssd1306_draw.o
rw-rw-r-- 1000/1000  13624 Apr 18 11:25 2019 font_droid_sans_fallback_15x17.o
rw-rw-r-- 1000/1000  12244 Apr 18 11:25 2019 font_droid_sans_mono_13x24.o
rw-rw-r-- 1000/1000  18740 Apr 18 11:25 2019 font_liberation_mono_17x30.o
rw-rw-r-- 1000/1000  17844 Apr 18 11:25 2019 font_droid_sans_mono_16x31.o
rw-rw-r-- 1000/1000   8472 Apr 18 11:25 2019 font_droid_sans_fallback_11x13.o
rw-rw-r-- 1000/1000   7532 Apr 18 11:25 2019 font_liberation_mono_9x15.o
rw-rw-r-- 1000/1000  12244 Apr 18 11:25 2019 font_liberation_mono_13x21.o
rw-rw-r-- 1000/1000  25048 Apr 18 11:25 2019 font_droid_sans_fallback_24x28.o
rw-rw-r-- 1000/1000   6636 Apr 18 11:25 2019 font_droid_sans_mono_7x13.o
rw-rw-r-- 1000/1000   2024 Apr 18 11:25 2019 default_if_spi.o
rw-rw-r-- 1000/1000   2024 Apr 18 11:25 2019 default_if_i2c.o

Advice, please.

I use this library on ESP32-CAM.
If I run my program incude this library, but error occured.
that error is hear

E (370) i2c: i2c driver install error
E (370) SSD1306_I2CMasterInitDefault: i2c_driver_install( I2CPortNumber, Config.mode, 0, 0, 0 ) != ESP_OK, result: -1

Please tell me How to fix this error.

I am using https://github.com/TaraHoleInIt/tarablessd1306 to drive the OLED. and https://github.com/UncleRus/esp-idf-lib to drive qmc5883l magneto meter. When I try to use both in the same code, ESP crashes.

Goodnight,
I am using an example program and I want to edit the code by adding some libraries, the code is as follows:

#include <stdio.h>
#include <stdbool.h>
#include <string.h>
#include "ssd1306.h"
#include "ssd1306_draw.h"
#include "ssd1306_font.h"
#include "ssd1306_default_if.h"
#include <esp_system.h>
#include <bmp280.h>
#include <string.h>

#define USE_I2C_DISPLAY
#define SDA_GPIO 4
#define SCL_GPIO 5

static const int I2CDisplayAddress = 0x3C;
static const int I2CDisplayWidth = 128;
static const int I2CDisplayHeight = 64;
static const int I2CResetPin = -1;

struct SSD1306_Device I2CDisplay;

void SetupDemo( struct SSD1306_Device* DisplayHandle, const struct SSD1306_FontDef* Font );
void SayHello( struct SSD1306_Device* DisplayHandle, const char* HelloText );

bool DefaultBusInit( void ) {
assert( SSD1306_I2CMasterInitDefault( ) == true );
assert( SSD1306_I2CMasterAttachDisplayDefault( &I2CDisplay, I2CDisplayWidth, I2CDisplayHeight, I2CDisplayAddress, I2CResetPin ) == true );

return true;

}
void SetupDemo( struct SSD1306_Device* DisplayHandle, const struct SSD1306_FontDef* Font ) {
SSD1306_Clear( DisplayHandle, SSD_COLOR_BLACK );
SSD1306_SetFont( DisplayHandle, Font );
}

void SayHello( struct SSD1306_Device* DisplayHandle, const char* HelloText ) {
SSD1306_FontDrawAnchoredString( DisplayHandle, TextAnchor_Center, HelloText, SSD_COLOR_WHITE );
SSD1306_Update( DisplayHandle );
}

void app_main( void ) {
printf( "Ready...\n" );

if ( DefaultBusInit( ) == true ) {
    printf( "BUS Init lookin good...\n" );
    printf( "Drawing.\n" );

    #if defined USE_I2C_DISPLAY
        SetupDemo( &I2CDisplay, &Font_droid_sans_fallback_24x28 );
        SayHello( &I2CDisplay, "SICCUS!" );
    #endif

    printf( "Done!\n" );
}

}

I'm using Eclipse IDE

but i get the following error when did the compilation:
Building in: D:\Eclipse\Trabajo\Oled_BMP280\build
cmake --build . -- -v
[1/9] cmd.exe /C "cd /D D:\Eclipse\Trabajo\Oled_BMP280\build\esp-idf\partition_table && "C:\Users\C. Alejandro.espressif\tools\cmake\3.13.4\bin\cmake.exe" -E echo "Partition table binary generated. Contents:" && "C:\Users\C. Alejandro.espressif\tools\cmake\3.13.4\bin\cmake.exe" -E echo ******************************************************************************* && python C:/esp-idf/components/partition_table/gen_esp32part.py -q --offset 0x8000 --flash-size 4MB D:/Eclipse/Trabajo/Oled_BMP280/build/partition_table/partition-table.bin && "C:\Users\C. Alejandro.espressif\tools\cmake\3.13.4\bin\cmake.exe" -E echo *******************************************************************************"
Partition table binary generated. Contents:

Espressif ESP32 Partition Table

Name, Type, SubType, Offset, Size, Flags

nvs,data,nvs,0x9000,24K,
phy_init,data,phy,0xf000,4K,
factory,app,factory,0x10000,1M,

[2/9] cmd.exe /C "cd /D D:\Eclipse\Trabajo\Oled_BMP280\build\bootloader && "C:\Users\C. Alejandro.espressif\tools\cmake\3.13.4\bin\cmake.exe" --build ."
ninja: no work to do.
[3/7] ccache C:\Users\C765B1.ALE\ESPRES1\tools\XTENSA1\ESP-201.0\XTENSA1\bin\XT89941.EXE -DHAVE_CONFIG_H -DMBEDTLS_CONFIG_FILE="mbedtls/esp_config.h" -DUNITY_INCLUDE_CONFIG_H -DWITH_POSIX -Iconfig -IC:/esp-idf/components/newlib/platform_include -IC:/esp-idf/components/freertos/include -IC:/esp-idf/components/heap/include -IC:/esp-idf/components/log/include -IC:/esp-idf/components/soc/esp32/include -IC:/esp-idf/components/soc/include -IC:/esp-idf/components/esp_rom/include -IC:/esp-idf/components/esp_common/include -IC:/esp-idf/components/xtensa/include -IC:/esp-idf/components/xtensa/esp32/include -IC:/esp-idf/components/esp32/include -IC:/esp-idf/components/driver/include -IC:/esp-idf/components/esp_ringbuf/include -IC:/esp-idf/components/esp_event/include -IC:/esp-idf/components/tcpip_adapter/include -IC:/esp-idf/components/lwip/include/apps -IC:/esp-idf/components/lwip/include/apps/sntp -IC:/esp-idf/components/lwip/lwip/src/include -IC:/esp-idf/components/lwip/port/esp32/include -IC:/esp-idf/components/lwip/port/esp32/include/arch -IC:/esp-idf/components/vfs/include -IC:/esp-idf/components/esp_wifi/include -IC:/esp-idf/components/esp_wifi/esp32/include -IC:/esp-idf/components/esp_eth/include -IC:/esp-idf/components/efuse/include -IC:/esp-idf/components/efuse/esp32/include -IC:/esp-idf/components/app_trace/include -IC:/esp-idf/components/mbedtls/port/include -IC:/esp-idf/components/mbedtls/mbedtls/include -IC:/esp-idf/components/wpa_supplicant/include -IC:/esp-idf/components/wpa_supplicant/port/include -IC:/esp-idf/components/wpa_supplicant/include/esp_supplicant -IC:/esp-idf/components/bootloader_support/include -IC:/esp-idf/components/app_update/include -IC:/esp-idf/components/spi_flash/include -IC:/esp-idf/components/nvs_flash/include -IC:/esp-idf/components/pthread/include -IC:/esp-idf/components/espcoredump/include -IC:/esp-idf/components/asio/asio/asio/include -IC:/esp-idf/components/asio/port/include -IC:/esp-idf/components/coap/port/include -IC:/esp-idf/components/coap/port/include/coap -IC:/esp-idf/components/coap/libcoap/include -IC:/esp-idf/components/coap/libcoap/include/coap2 -IC:/esp-idf/components/console -IC:/esp-idf/components/nghttp/port/include -IC:/esp-idf/components/nghttp/nghttp2/lib/includes -IC:/esp-idf/components/esp-tls -IC:/esp-idf/components/esp_adc_cal/include -IC:/esp-idf/components/esp_gdbstub/include -IC:/esp-idf/components/tcp_transport/include -IC:/esp-idf/components/esp_http_client/include -IC:/esp-idf/components/esp_http_server/include -IC:/esp-idf/components/esp_https_ota/include -IC:/esp-idf/components/protobuf-c/protobuf-c -IC:/esp-idf/components/protocomm/include/common -IC:/esp-idf/components/protocomm/include/security -IC:/esp-idf/components/protocomm/include/transports -IC:/esp-idf/components/mdns/include -IC:/esp-idf/components/esp_local_ctrl/include -IC:/esp-idf/components/esp_websocket_client/include -IC:/esp-idf/components/expat/expat/expat/lib -IC:/esp-idf/components/expat/port/include -IC:/esp-idf/components/wear_levelling/include -IC:/esp-idf/components/sdmmc/include -IC:/esp-idf/components/fatfs/diskio -IC:/esp-idf/components/fatfs/vfs -IC:/esp-idf/components/fatfs/src -IC:/esp-idf/components/freemodbus/common/include -IC:/esp-idf/components/idf_test/include -IC:/esp-idf/components/jsmn/include -IC:/esp-idf/components/json/cJSON -IC:/esp-idf/components/libsodium/libsodium/src/libsodium/include -IC:/esp-idf/components/libsodium/port_include -IC:/esp-idf/components/mqtt/esp-mqtt/include -IC:/esp-idf/components/openssl/include -IC:/esp-idf/components/spiffs/include -IC:/esp-idf/components/ulp/include -IC:/esp-idf/components/unity/include -IC:/esp-idf/components/unity/unity/src -IC:/esp-idf/components/wifi_provisioning/include -I../components/tarablessd1306 -mlongcalls -Wno-frame-address -ffunction-sections -fdata-sections -fstrict-volatile-bitfields -nostdlib -Wall -Werror=all -Wno-error=unused-function -Wno-error=unused-but-set-variable -Wno-error=unused-variable -Wno-error=deprecated-declarations -Wextra -Wno-unused-parameter -Wno-sign-compare -ggdb -Og -std=gnu99 -Wno-old-style-declaration -D_GNU_SOURCE -DIDF_VER="v4.0.1-dirty" -DGCC_NOT_5_2_0 -DESP_PLATFORM -MD -MT esp-idf/main/CMakeFiles/__idf_main.dir/main.c.obj -MF esp-idf\main\CMakeFiles__idf_main.dir\main.c.obj.d -o esp-idf/main/CMakeFiles/__idf_main.dir/main.c.obj -c ../main/main.c
FAILED: esp-idf/main/CMakeFiles/__idf_main.dir/main.c.obj
ccache C:\Users\C765B1.ALE\ESPRES1\tools\XTENSA1\ESP-201.0\XTENSA1\bin\XT89941.EXE -DHAVE_CONFIG_H -DMBEDTLS_CONFIG_FILE="mbedtls/esp_config.h" -DUNITY_INCLUDE_CONFIG_H -DWITH_POSIX -Iconfig -IC:/esp-idf/components/newlib/platform_include -IC:/esp-idf/components/freertos/include -IC:/esp-idf/components/heap/include -IC:/esp-idf/components/log/include -IC:/esp-idf/components/soc/esp32/include -IC:/esp-idf/components/soc/include -IC:/esp-idf/components/esp_rom/include -IC:/esp-idf/components/esp_common/include -IC:/esp-idf/components/xtensa/include -IC:/esp-idf/components/xtensa/esp32/include -IC:/esp-idf/components/esp32/include -IC:/esp-idf/components/driver/include -IC:/esp-idf/components/esp_ringbuf/include -IC:/esp-idf/components/esp_event/include -IC:/esp-idf/components/tcpip_adapter/include -IC:/esp-idf/components/lwip/include/apps -IC:/esp-idf/components/lwip/include/apps/sntp -IC:/esp-idf/components/lwip/lwip/src/include -IC:/esp-idf/components/lwip/port/esp32/include -IC:/esp-idf/components/lwip/port/esp32/include/arch -IC:/esp-idf/components/vfs/include -IC:/esp-idf/components/esp_wifi/include -IC:/esp-idf/components/esp_wifi/esp32/include -IC:/esp-idf/components/esp_eth/include -IC:/esp-idf/components/efuse/include -IC:/esp-idf/components/efuse/esp32/include -IC:/esp-idf/components/app_trace/include -IC:/esp-idf/components/mbedtls/port/include -IC:/esp-idf/components/mbedtls/mbedtls/include -IC:/esp-idf/components/wpa_supplicant/include -IC:/esp-idf/components/wpa_supplicant/port/include -IC:/esp-idf/components/wpa_supplicant/include/esp_supplicant -IC:/esp-idf/components/bootloader_support/include -IC:/esp-idf/components/app_update/include -IC:/esp-idf/components/spi_flash/include -IC:/esp-idf/components/nvs_flash/include -IC:/esp-idf/components/pthread/include -IC:/esp-idf/components/espcoredump/include -IC:/esp-idf/components/asio/asio/asio/include -IC:/esp-idf/components/asio/port/include -IC:/esp-idf/components/coap/port/include -IC:/esp-idf/components/coap/port/include/coap -IC:/esp-idf/components/coap/libcoap/include -IC:/esp-idf/components/coap/libcoap/include/coap2 -IC:/esp-idf/components/console -IC:/esp-idf/components/nghttp/port/include -IC:/esp-idf/components/nghttp/nghttp2/lib/includes -IC:/esp-idf/components/esp-tls -IC:/esp-idf/components/esp_adc_cal/include -IC:/esp-idf/components/esp_gdbstub/include -IC:/esp-idf/components/tcp_transport/include -IC:/esp-idf/components/esp_http_client/include -IC:/esp-idf/components/esp_http_server/include -IC:/esp-idf/components/esp_https_ota/include -IC:/esp-idf/components/protobuf-c/protobuf-c -IC:/esp-idf/components/protocomm/include/common -IC:/esp-idf/components/protocomm/include/security -IC:/esp-idf/components/protocomm/include/transports -IC:/esp-idf/components/mdns/include -IC:/esp-idf/components/esp_local_ctrl/include -IC:/esp-idf/components/esp_websocket_client/include -IC:/esp-idf/components/expat/expat/expat/lib -IC:/esp-idf/components/expat/port/include -IC:/esp-idf/components/wear_levelling/include -IC:/esp-idf/components/sdmmc/include -IC:/esp-idf/components/fatfs/diskio -IC:/esp-idf/components/fatfs/vfs -IC:/esp-idf/components/fatfs/src -IC:/esp-idf/components/freemodbus/common/include -IC:/esp-idf/components/idf_test/include -IC:/esp-idf/components/jsmn/include -IC:/esp-idf/components/json/cJSON -IC:/esp-idf/components/libsodium/libsodium/src/libsodium/include -IC:/esp-idf/components/libsodium/port_include -IC:/esp-idf/components/mqtt/esp-mqtt/include -IC:/esp-idf/components/openssl/include -IC:/esp-idf/components/spiffs/include -IC:/esp-idf/components/ulp/include -IC:/esp-idf/components/unity/include -IC:/esp-idf/components/unity/unity/src -IC:/esp-idf/components/wifi_provisioning/include -I../components/tarablessd1306 -mlongcalls -Wno-frame-address -ffunction-sections -fdata-sections -fstrict-volatile-bitfields -nostdlib -Wall -Werror=all -Wno-error=unused-function -Wno-error=unused-but-set-variable -Wno-error=unused-variable -Wno-error=deprecated-declarations -Wextra -Wno-unused-parameter -Wno-sign-compare -ggdb -Og -std=gnu99 -Wno-old-style-declaration -D_GNU_SOURCE -DIDF_VER="v4.0.1-dirty" -DGCC_NOT_5_2_0 -DESP_PLATFORM -MD -MT esp-idf/main/CMakeFiles/__idf_main.dir/main.c.obj -MF esp-idf\main\CMakeFiles__idf_main.dir\main.c.obj.d -o esp-idf/main/CMakeFiles/__idf_main.dir/main.c.obj -c ../main/main.c
In file included from ../components/tarablessd1306/ssd1306_err.h:5,
from ../components/tarablessd1306/ssd1306.h:11,
from ../main/main.c:11:
C:/esp-idf/components/xtensa/include/esp_panic.h:2:2: warning: #warning "esp_panic.h is deprecated, please use esp_debug_helpers.h or/and esp_private/panic_reason.h" [-Wcpp]
#warning "esp_panic.h is deprecated, please use esp_debug_helpers.h or/and esp_private/panic_reason.h"
^~~~~~~
In file included from C:/esp-idf/components/esp_common/include/esp_system.h:22,
from ../main/main.c:15:
C:/esp-idf/components/esp_common/include/esp_bit_defs.h:53: warning: "BIT" redefined
#define BIT(nr) (1UL << (nr))

In file included from ../main/main.c:11:
../components/tarablessd1306/ssd1306.h:19: note: this is the location of the previous definition
#define BIT( n ) ( 1 << n )

../main/main.c:16:10: fatal error: bmp280.h: No such file or directory
#include <bmp280.h>
^~~~~~~~~~
compilation terminated.
ninja: build stopped: subcommand failed.
Build complete (1 errors, 2 warnings): D:\Eclipse\Trabajo\Oled_BMP280\build

I think i have to do is add the library into my code, but i don't know to do it.
Thanks in advance

I've tried using two separate 128x64/0.96" SSD1306 OLED displays and both yield the same result.
I'm using ESP-IDF v4.0 and HelloWorld tarablessd1306_examples component. Any ideas what's causing this? When SSD1306_Clear is not called, the lines aren't drawn, but clearing and then updating draws these 8 unwanted horizontal lines.

None of the SSD1306_DrawLine functions are being called.

How can I show the value of a variable on the display, because I can only show text?

The following exception is thrown when i2c display support is enabled but the display is disconnected.

I don't have an SPI display to test if the issue happens there.

E (162) I2CDefaultWriteBytes: i2c_master_cmd_begin( I2CPortNumber, CommandHandle, pdMS_TO_TICKS( 1000 ) ) != ESP_OK, result: -1
abort() was called at PC 0x400e063a on core 0
0x400e063a: I2CDefaultWriteBytes at components/tarablessd1306/ifaces/default_if_i2c.c:107 (discriminator 4)

The issue can be resolved by changing line default_if_i2c.c:107, but I am unsure if this is the best practice or other implications of this change:

i2c_master_cmd_begin( I2CPortNumber, CommandHandle, pdMS_TO_TICKS( 1000 ) );