vaandcob/esp32-obd2-gauge

DIY bluetooth obd2 gauge with ESP32

esp32-obd2-gauge's Issues

Instructions how to use

Hello. Im tryping to make a OBD2 project with my Lexus GS300 2001 with a ESP32 and ELM327 bluetooth adapter 2.1. I want to use your lib to connect to the ELM327 and retrieve RPM values; but which code do i use exactly to do this?

Question: Enclosure design files

First of all, congrats for such a great project! I have one question for you. I really like the enclosure shown in your photos. Is 3d printed? Do you have the design files? Thank you!

Incompatibility with BluetoothSerial library on LilyGo T-Display-S3

i am working on similar project and when i attempting to use the BluetoothSerial library with the LilyGo T-Display-S3 board results in compilation errors. The same code compiles and runs as expected on a standard ESP32 board, indicating the issue is specific to the LilyGo T-Display-S3 board.

Here is the code:

#include "BluetoothSerial.h"

BluetoothSerial SerialBT; // Object for Bluetooth

void setup() {
Serial.begin(115200); // Start the built-in serial port, possibly to communicate with the host computer
//SerialBT.begin("ESP32test"); // Start BluetoothSerial with the name "ESP32test"

Serial.println("Bluetooth device is ready to pair");
}

void loop() {
if (SerialBT.available()) { // Check if we receive anything from Bluetooth
Serial.write(SerialBT.read()); // Send what we receive to the built-in serial port
}

if (Serial.available()) { // Check if anything is coming from the built-in serial port
SerialBT.write(Serial.read()); // Send what we receive to Bluetooth
}
}

Here is the error:

c:/users/talha/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32s3-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32s3-elf/8.4.0/../../../../xtensa-esp32s3-elf/bin/ld.exe: libraries\BluetoothSerial\BluetoothSerial.cpp.o:(.literal._ZL8_stop_btv+0x18): undefined reference to esp_spp_disconnect' c:/users/talha/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32s3-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32s3-elf/8.4.0/../../../../xtensa-esp32s3-elf/bin/ld.exe: libraries\BluetoothSerial\BluetoothSerial.cpp.o:(.literal._ZL8_stop_btv+0x1c): undefined reference to esp_spp_deinit'
c:/users/talha/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32s3-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32s3-elf/8.4.0/../../../../xtensa-esp32s3-elf/bin/ld.exe: libraries\BluetoothSerial\BluetoothSerial.cpp.o: in function _stop_bt()': C:\Users\Talha\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.14\libraries\BluetoothSerial\src/BluetoothSerial.cpp:714: undefined reference to esp_spp_disconnect'
c:/users/talha/appdata/local/arduino15/packages/esp32/tools/xtensa-esp32s3-elf-gcc/esp-2021r2-patch5-8.4.0/bin/../lib/gcc/xtensa-esp32s3-elf/8.4.0/../../../../xtensa-esp32s3-elf/bin/ld.exe: C:\Users\Talha\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.14\libraries\BluetoothSerial\src/BluetoothSerial.cpp:715: undefined reference to `esp_spp_deinit'
collect2.exe: error: ld returned 1 exit status
exit status 1
Error compiling for board LilyGo T-Display-S3.

error: 'sigmaDeltaSetup' was not declared in this scope

error: 'sigmaDeltaSetup' was not declared in this scope

in the nes_audio.cpp. maybe its a library i need to install?

i dont have the yellow display..but i have the 2.4inch spi interface display..

i dont have the yellow display..but i have the 2.4inch spi interface display...is this display compaitable with this project and can you give me the wiring digram

Please elaborate on "New device must flash "gauge_factory_init.ino" first to get it work by checking 'serialno' in pref."

I'm trying to flash your project to my new device. It is identical to the one you linked to. After building and flashing i just get a black screen and the text "Touch screen calibration..." on the serial monitor.

You mention in the notes: "New device must flash "gauge_factory_init.ino" first to get it work by checking 'serialno' in pref."

Is this related to the issue I am having?

I do not see this particular file in the source tree and google cant find it either.
Could you explain where I can find this file and what it does to the board to prepare it for you firmware?

Many thanks