LilyGO/T-Embed is a panel that uses the ESP32S, an rotary encoder with push button, and a TFT ST7789 display, all together, for application development. The picture below shows LilyGO/T-Embed.
This document is about the LilyGo T-Embed device as a receiver based on the RDA5807 IC family. The main parts of the sketch used here was written by Volos. The Volos' project is a receiver based on the TEA5767 device and his work has adapted to RDA5807 device by the author of this library.
All you have to know to use this project with your LilyGo T-Embed panel can be found here.
As you can see in the picture above, the LilyGO/T-Embed has some extra pins that you can use in your application. See Grove, GPIO PINOUT, and TFT Card Slot. Preferably, use the pins SDA (IO18), SCL (IO8), IO16, IO17, IO40, IO38 and IO41. The picture below shows the ESP32 pinout.
See this link for more details about LilyGo T-Embed
If you find this project useful, consider making a donation so that the author of this library can purchase components and modules for improvements and testing of this library. Click here to donate.
- On Arduino IDE, go to Preferences, edit the field "Additional Boards Manager URLs:" and add the URL https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json .
- After, on Tools menu, select the option "Board:", "Boards Manager...". Look for esp32 and install it.
- Go to LilyGo T-Embed github repository and download it. Unzip the downloaded file, go to lib folder, copy and paste RotaryEncoder and TFT_eSPI folders to the your Arduino installation, libraries folder (in general Documents/Arduino/libraries/). See picture below.
- Install the Arduino library FastLED using Arduino IDE, tools menu, Manager libraries... option. See picture below.
- Install the library Battery 18650 Stats. See picture below.
The table and pictures below show the LilyGo T-Embed and RDA5807 devices connection.
ESP32-S3 wire up and internal used pins.
| Device name | Device Pin / Description | ESP32 |
|---|---|---|
| LilyGo Painel I2C | ||
| SDA/SDIO | GPIO 18 | |
| SCL/SCLK | GPIO 8 | |
| Encoder LilyGo Painel | ||
| A | GPIO 2 | |
| B | GPIO 1 | |
| PUSH BUTTON (encoder) | GPIO 0 | |
| Battery Indicator | GPIO 4 | |
| LCD LED | GPIO 15 | |
| Power ON | GPIO 46 | |
| SI453X MCU RESET PIN | ||
| See table below | ESP32 PIN USED FOR RESETTING | GPIO 16 |
| RDA5807 | DESC. | ESP32 (GPIO) |
|---|---|---|
| SDA | SDIO | 18 (SDA / GPIO18) |
| SCLK | SCLK | 8 (SCL / GPIO8) |
| GPIO | Description |
|---|---|
| 0 | Encoder Push Button |
| 1 | Encoder B |
| 2 | Encoder A |
| 4 | Battery Indicator |
| 15 | Display LED (LCD_BL) |
| 46 | Power On (turn it high) |
In some cases you can get errors below during FastLED library compilation.
/Users/XXXXX/Documents/Arduino/libraries/FastLED/src/platforms/esp/32/clockless_rmt_esp32.cpp: In static member function 'static void ESP32RMTController::init(gpio_num_t)':/Users/XXXXX/Documents/Arduino/libraries/FastLED/src/platforms/esp/32/clockless_rmt_esp32.cpp:111:15: error: variable 'espErr' set but not used [-Werror=unused-but-set-variable]
esp_err_t espErr = ESP_OK;
/Users/XXXXX/Documents/Arduino/libraries/FastLED/src/platforms/esp/32/clockless_rmt_esp32.cpp: In member function 'void ESP32RMTController::startOnChannel(int)':
/Users/XXXXX/Documents/Arduino/libraries/FastLED/src/platforms/esp/32/clockless_rmt_esp32.cpp:239:15: error: variable 'espErr' set but not used [-Werror=unused-but-set-variable]
esp_err_t espErr = ESP_OK;
cc1plus: some warnings being treated as errors
To solve that problem, choose one of the following three methods:
On Arduino IDE, preferences, select Default option for Compiler warnings field. See picture below.
Edit the file Documents/Arduino/libraries/FastLED/src/platforms/esp/32/clockless_rmt_esp32.h (See the right path of your Arduino installation) as shown below.
#ifndef FASTLED_RMT_SERIAL_DEBUG
#define FASTLED_RMT_SERIAL_DEBUG 0
#endifReplace from FASTLED_RMT_SERIAL_DEBUG 0 to FASTLED_RMT_SERIAL_DEBUG 1 as shown below
#ifndef FASTLED_RMT_SERIAL_DEBUG
#define FASTLED_RMT_SERIAL_DEBUG 1
#endifEdit the file Documents/Arduino/libraries/FastLED/src/platforms/esp/32/clockless_rmt_esp32.h (See the right path of your Arduino installation) as shown below.
Replace
#if FASTLED_RMT_SERIAL_DEBUG == 1
#define FASTLED_DEBUG(format, errcode, ...) if (errcode != ESP_OK) { Serial.printf(PSTR("FASTLED: " format "\n"), errcode, ##__VA_ARGS__); }
#else
#define FASTLED_DEBUG(format, ...)
#endifto
#if FASTLED_RMT_SERIAL_DEBUG == 1
#define FASTLED_DEBUG(format, errcode, ...) if (errcode != ESP_OK) { Serial.printf(PSTR("FASTLED: " format "\n"), errcode, ##__VA_ARGS__); }
#else
#define FASTLED_DEBUG(format, errcode, ...) if (errcode != ESP_OK) { }
#endif