https://github.com/nopnop2002/esp-idf-uart2bt

UART to Bluetooth bridge for ESP-IDF
https://github.com/nopnop2002/esp-idf-uart2bt

ble bluetooth esp-idf esp32 gateway uart

Last synced: 9 months ago
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UART to Bluetooth bridge for ESP-IDF

• Host: GitHub
• URL: https://github.com/nopnop2002/esp-idf-uart2bt
• Owner: nopnop2002
• License: mit
• Created: 2022-06-10T22:47:35.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2025-01-30T22:51:39.000Z (11 months ago)
• Last Synced: 2025-02-28T19:53:16.342Z (10 months ago)
• Topics: ble, bluetooth, esp-idf, esp32, gateway, uart
• Language: C
• Homepage:
• Size: 117 KB
• Stars: 27
• Watchers: 2
• Forks: 10
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

          
# esp-idf-uart2bt

UART to Bluetooth bridge for ESP-IDF.

![Android-2](https://user-images.githubusercontent.com/6020549/173160564-4790a2cf-d084-400e-9a75-89cc2655f12e.JPG)

![urt2bt](https://user-images.githubusercontent.com/6020549/173161730-496501d3-163b-4e58-bb5b-f2fdfaa7854a.jpg)

# Software requirements

ESP-IDF V5.0 or later.   

ESP-IDF V4.4 release branch reached EOL in July 2024.   

# Using classic bluetooth (ESP32 only)

```

git clone https://github.com/nopnop2002/esp-idf-uart2bt

cd esp-idf-uart2bt/classic_bt

idf.py set-target esp32

idf.py menuconfig

idf.py flash

```

# Using ble 4.2

```

git clone https://github.com/nopnop2002/esp-idf-uart2bt

cd esp-idf-uart2bt/ble

idf.py set-target {esp32/esp32s3/esp32c2/esp32c3/esp32c6}

idf.py menuconfig

idf.py flash

```

# Configuration

![config-top](https://user-images.githubusercontent.com/6020549/173160346-be330c9b-2aef-4d12-8906-9b3b3a4e0225.jpg)

![config-uart](https://user-images.githubusercontent.com/6020549/173160343-fcf36ffe-d51e-44bc-a299-8f3e2eb5fe9b.jpg)

# Write this sketch on Arduino Uno.   

You can use any AtMega microcontroller.   

```

unsigned long lastMillis = 0;

void setup() {

  Serial.begin(115200);

}

void loop() {

  while (Serial.available()) {

    String command = Serial.readStringUntil('\n');

    Serial.println(command);

  }

  if(lastMillis + 1000 <= millis()){

    Serial.print("Hello World ");

    Serial.println(millis());

    lastMillis += 1000;

  }

  delay(1);

}

```

# Connect ESP32 and AtMega328 using wire cable   

|AtMega328||ESP32|ESP32S3|ESP32C2/C3/C6|

|:-:|:-:|:-:|:-:|:-:|

|TX|--|GPIO16|GPIO2|GPIO1|

|RX|--|GPIO17|GPIO1|GPIO0|

|GND|--|GND|GND|GND|

__You can change it to any pin using menuconfig.__   

# Android Application   

I used [this](https://play.google.com/store/apps/details?id=de.kai_morich.serial_bluetooth_terminal) app.   

# iOS Application   

[This](https://apps.apple.com/jp/app/bluetooth-v2-1-spp-setup/id6449416841) might work, but I don't have iOS so I don't know.   

# References

https://github.com/nopnop2002/esp-idf-web-serial

https://github.com/nopnop2002/esp-idf-uart2udp

https://github.com/nopnop2002/esp-idf-uart2mqtt