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LILYGO T-Embed CC1101: Enabling Sub-GHz and NFC/RFID Communication

Sep 26, 2024 — by Giorgio Mendoza 3,458 views

LILYGO launched the T-Embed CC1101, built around the ESP32-S3 Dual-core LX7. It supports Wi-Fi, BLE 5, and Sub-GHz wireless communication, targeting remote and low-power IoT projects.

The ESP32-S3 microcontroller is paired with 16MB of Flash memory and 8MB of PSRAM. The CC1101 chip operates across frequency bands of 300-348 MHz, 387-464 MHz, and 779-928 MHz, with a communication range of up to 50 meters.

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An integrated radio antenna ensures efficient long-range communication, and the board also supports external radio modules for additional Sub-GHz applications.

ESP32-S3 block diagram
(click image to enlarge)

The board features a 1.9-inch ST7789V IPS color TFT LCD with a resolution of 320 x 170 pixels, interfaced via SPI with the ST7789V driver chip.

Additionally, the board is equipped with an infrared transmitter and receiver, a built-in microphone, and a PN532 NFC/RFID transceiver for contactless communication at 13.56 MHz.

T-Embed CC1101 pinout
(click image to enlarge)

For further I/O expansion, the device includes two Qwiic connectors, an encoder for navigating the device menu, and a MicroSD card slot for additional storage.

Supporting both USB and Li-Po battery power, the board includes an onboard 1300mAh Li-Po battery, allowing independent operation for prolonged periods in remote sensor applications.

T-Embed CC1101 peripherals
(click image to enlarge)

It is also compatible with popular development platforms like Arduino IDE and ESP-IDF, offering flexibility for IoT, wireless communication, or sensor-based projects.

Examples from the GitHub repository include tests for battery status, wireless communication, display functionality, infrared communication, NFC, SD card interaction, and audio recording/playback.

Further information

The T-Embed CC1101 is available for $30.68 on the LILYGO online store.

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