Walkie-Talkie module Built On Tiny ESP32 board

Walkie-Talkie module Built On Tiny ESP32 board

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Recently, LILYGO introduced a compact ESP32-S3 gadget that features a Walkie-Talkie module along with additional components like an OLED screen, speaker, microphone, and a slot for a 18650 battery. An ESP32 gadget with a stylus-equipped LCD display was also on show.

The T-TWR is said to have an embedded ESP32-S3-WROM-1-N16R8 microprocessor, as detailed on the product page. Xtensa’s 32-bit LX7 dual-core ESP32-S3 processor (up to 240MHz) and 16 MB of flash memory. With Bluetooth 5.0 and Wi-Fi at 2.4GHz, the PSRAM has 8MB of storage.

T-TWR pinout

A 0.96-inch OLED LCD display that supports the I2C interface protocol is built within the system; this model is the SSD1306. The built-in walkie-talkie module supports 1.6w/1.8w  and operates at a bandwidth of 12.5KHz/25KHz. The module can also be purchased in additional radio-frequency options, such as UFV, VHF, and 350. In addition to one suitable antenna and two 13-pin headers, the order appears to contain a T-TWR ESP32-S3 module. The necessary information can be found in the GitHub repository linked below.

T-TWR module

T-TWR features a 0.96-inch OLED SSD1306 screen (128 x 64). With a sensitivity of -124 dBm and a bandwidth of 12.5 kHz/25 kHz, the walkie-talkie module is compatible with frequencies in the ranges of 400 – 480 MHz UFV (optional), 134 – 174 MHz VHF (optional), 320 – 400 MHz, and 350 MHz (optional). There is one USB Type-C port available. There is only one microphone and one speaker for input and output, respectively. The status LEDs and IO3, and stemma QT/ Qwicc connectors, as well as the encoder, are all included. This item has a size of 122 x 32 x 22 mm. Battery operation is used.

T-HMI pinout

T-HMI embedded board is also based on ESP32-S3R8 microprocessor. Xtensa 32-bit LX7 dual-core (up to 240MHz) with 16 MB Flash and 8 MB PSRAM is featured in the ESP32-S3. Bluetooth 5.0 and Wi-Fi at 2.4 GHz are also included. The screen is a 2.8″ resistive IPS TFT LCD (ST7789V) with a resolution of 240 pixels by 320 pixels. Similar to other TFT LCDs, this one communicates via a parallel 8-bit interface. The board has a USB Type-C port for external power and programming, as well as a battery connector for use with an external power source, as can be seen in the images below.

T-HMI peripherals

On the product page, there is a GitHub repository with examples that can be used as documentation. For this product, the order comes with the board, a resistive screen stylus pen, and a PH2.0 battery cable. The T-TWR board can be bought on AliExpress.com for $45.58. In the same way, LILIGO’s online store lists the T-HMI for $23.73.

About Rakesh Kumar, Ph.D.

Rakesh holds a Ph.D. in Electrical Engineering with a specialization in power electronics. He is an avid enthusiast of electronics, especially embedded technologies, including Arduino and ESP32. He likes to write articles and tutorials in the field of electronics. He is also a teacher and researcher by profession.

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