LILYGO TTGO T-Micro32 V2.0 ESP32 SMD Module (Ceramic + IPEX Antenna)

Specifications

• Microcontroller: ESP32 (Dual-core, up to 240 MHz)

• Wireless: 2.4 GHz Wi-Fi (802.11 b/g/n) & Bluetooth v4.2 BR/EDR and BLE

• Flash Memory: 4MB

• PSRAM: 2MB

• Antenna Options: Onboard Ceramic Antenna & External IPEX Connector

• Mounting Style: Surface Mount Device (SMD) Castellated Edges

• Dimensions: 18.9mm (L) x 13.0mm (W) x 2.8mm (H)

Key Applications and Projects

• Mass Production IoT Hardware: Designing a custom, branded smart plug or light switch and using the T-Micro32 as the primary network brain to save on BOM costs and PCB real estate.

• Custom Wearables: Creating a DIY smartwatch or fitness tracker, utilizing the module's tiny footprint and internal ceramic antenna.

• Miniature Sensor Nodes: Building microscopic temperature and humidity sensors that can be hidden behind picture frames or under furniture.

Unlock New Capabilities (Project Evolution) The Custom Smart Home Hub: Ready to graduate from buying pre-made boards? Design your own custom PCB using software like KiCad! You can route the T-Micro32 V2.0's castellated pins to a dedicated power management IC, an SD card slot, and custom sensor headers. By creating your own carrier board around this module, you maintain complete control over the form factor, ensuring your final Smart Home Hub looks like a professional, manufactured product rather than a mess of breadboard wires!

PACKAGE INCLUDED

• 1 x LILYGO TTGO T-Micro32 V2.0 Module

Downloads & Links

• LILYGO TTGO T-Micro32 V2.0 Github Link

FREQUENTLY ASKED QUESTIONS (FAQ)

1. What exactly is the T-Micro32 V2.0? It is a bare ESP32 surface-mount module. Unlike standard development boards, it does not have a USB port, voltage regulator, or buttons. It is meant to be soldered onto your own custom circuit board.

2. How does it differ from an ESP32-WROOM module? The T-Micro32 is significantly smaller than a standard WROOM module (13x18.9mm vs. 18x25.5mm), making it much better suited for highly space-constrained projects.

3. What microcontroller is inside? It utilises the Espressif ESP32 dual-core microprocessor.

4. How much memory does it have? It typically features 4MB of Flash memory and 2MB of PSRAM to handle your code and data buffering.

5. Does it have Wi-Fi and Bluetooth? Yes, it supports standard 2.4 GHz Wi-Fi (802.11 b/g/n) and Bluetooth v4.2 (Classic and BLE).

6. What are the two components on the top edge? The white rectangular component is the onboard ceramic antenna. The gold circular component is a u.FL/IPEX connector for attaching an external antenna.

7. How do I switch between the ceramic and external antenna? Depending on the exact manufacturing batch, switching between the two antennas usually requires carefully desoldering and moving a tiny 0-ohm routing resistor located near the IPEX connector.

8. Can I plug this directly into a breadboard? No. The module has castellated edges (half-holes) designed for surface mounting. To use it on a breadboard, you would first need to solder it to a breakout adapter board.

9. How do I program this module? Because there is no USB port, you must program it using an external USB-to-TTL Serial adapter (like an FTDI or CP2102). You will connect the adapter's TX to the module's RX (IO3), RX to TX (IO1), and provide 3.3V and GND.

10. How do I put the module into bootloader mode for programming? You must manually pull GPIO 0 (IO0) to GND while momentarily pulling the EN/RST pin to GND. This sequence puts the ESP32 into flash mode.

11. What voltage does this module require? The T-Micro32 V2.0 operates strictly on 3.3V. Applying 5V directly to the power pins or GPIO pins will instantly destroy the module.

12. Does it have an onboard voltage regulator? No. You must provide a clean, stable 3.3V power source (using an LDO like the AMS1117-3.3) on your carrier board.

13. What are the exact dimensions? It measures 13.0mm in width, 18.9mm in length, and is 2.8mm thick.

14. What is the FCC ID listed on the shield? The metal EMI shield displays FCC ID: 2ASYE-T-MICRO32, certifying it for wireless transmission.

15. Can it run on a battery? Yes, but since it lacks a battery management system (BMS), you must design a LiPo charging and 3.3V regulation circuit onto your custom carrier board.

16. Does it support capacitive touch? Yes, the ESP32's native capacitive touch pins are broken out along the castellated edges (e.g., TOUCH0, TOUCH1, TOUCH2).

17. Can I remove the metal shield? It is highly recommended to leave the metal shield in place. It protects the sensitive oscillator and flash chips from electromagnetic interference (EMI) and acts as a heat sink.

18. What IDEs can I use to program it? Once connected via a serial adapter, it behaves like any standard ESP32 and can be programmed via the Arduino IDE, PlatformIO, or ESP-IDF.

19. What board should I select in the Arduino IDE? You can select "ESP32 Dev Module". Ensure you enable PSRAM in the tools menu if your code requires it.

20. What do the pads on the bottom of the module do? The central pads are typically exposed ground pads used for thermal dissipation and solid electrical grounding when reflow soldering to a carrier board.