LILYGO Unveils Solar-Powered LoRa Card and ESP32-C5 Wi-Fi...

Key Takeaway: LILYGO has released two new compact dev boards targeting wireless IoT builders: the T-Echo Card ($60), a credit-card-sized solar-powered LoRa mesh networking device with GNSS and IP66 waterproofing, and the T-Display C5 ($12), one of the first dev boards featuring Espressif’s ESP32-C5 with dual-band Wi-Fi 6. Both boards are fully open-source and support the Meshtastic firmware ecosystem for off-grid communication.

The open-source IoT hardware ecosystem continues to expand at a remarkable pace. LILYGO, the Shenzhen-based maker of some of the most popular ESP32 and Nordic-based development boards, has released two new products that address distinct segments of the wireless IoT market: a solar-powered off-grid mesh communicator and an ultra-affordable Wi-Fi 6 prototyping board. Both are available now, both are open-source, and both arrive at a time when the demand for accessible IoT development tools is at an all-time high.

T-Echo Card: A Credit-Card-Sized Solar LoRa Mesh Node

The T-Echo Card is LILYGO’s most ambitious product to date. Measuring just 90 x 60 x 9.5 mm (3.5 x 2.4 x 0.4 inches), this credit-card-sized device packs an extraordinary array of wireless and sensing capabilities into an IP66-rated waterproof enclosure:

Nordic nRF52840 MCU: The main processor, a well-proven Arm Cortex-M4F running at 64 MHz with 1MB Flash and 256KB RAM — the same chip that powers most Meshtastic-compatible devices.
SX1262 LoRa transceiver: Covering 400-520 MHz and 830-945 MHz frequency ranges, enabling long-range (several kilometers) low-power wireless communication without any internet infrastructure.
L76K GNSS module: Supporting GPS, GLONASS, BeiDou, and QZSS satellite constellations for precise location tracking.
0.25W solar panel: Built into the enclosure, enabling autonomous operation in remote deployments without regular battery charging.
Magnetic USB connector: For initial setup and programming, plus a 1.1 cm (0.42-inch) OLED display for status information.
Bluetooth 5 + NFC + 9-axis IMU: Additional connectivity and motion sensing capabilities.

What makes the T-Echo Card particularly interesting is its integration with the Meshtastic firmware — the same open-source firmware that made LILYGO’s earlier T-Echo devices popular for off-grid communication. Meshtastic turns compatible hardware into a decentralized mesh network where each device can relay messages from other devices, extending the network’s range without any centralized infrastructure.

For IoT engineers and hobbyists, the implications are significant. A network of T-Echo Cards can provide reliable text communication, GPS tracking, and sensor data transmission across several kilometers — all without cellular coverage, Wi-Fi, or internet access. Use cases range from disaster response communication to hiking group tracking, agricultural sensor networks, and industrial site monitoring.

The T-Echo Card is priced at $60 (approximately 55 EUR) and is available with selectable frequency options to comply with regional LoRa regulations.

T-Display C5: The First Affordable ESP32-C5 Wi-Fi 6 Dev Board

The T-Display C5 is one of the first development boards to ship with Espressif’s ESP32-C5, a RISC-V SoC that brings dual-band 2.4 GHz and 5 GHz Wi-Fi 6 to the microcontroller world alongside Bluetooth LE 5. At just $12 (approximately 11 EUR), it represents remarkable value for a Wi-Fi 6-capable dev board.

The timing of this board’s release is significant. In March 2026, Espressif released ESP-IDF v6.0, which finally promoted the ESP32-C5 from preview to stable support. This means both Arduino IDE and ESP-IDF projects can now target the ESP32-C5 with production-grade tooling — a milestone that makes the T-Display C5 viable for commercial product development, not just prototyping.

Key specifications of the T-Display C5:

ESP32-C5 RISC-V SoC: Dual-band Wi-Fi 6 (2.4 GHz + 5 GHz) and Bluetooth LE 5 — the first ESP32 variant to support both Wi-Fi 6 and 5 GHz bands in a single chip.
16 MB Flash + 8 MB PSRAM: Ample memory for complex firmware, data buffering, and local processing.
1.9-inch IPS color LCD: Driven by the ST7789 controller at 170 x 320 resolution, providing a vibrant display for user interfaces and sensor data visualization.
AXP2602 battery management IC: Handles LiPo charging and power management, enabling portable battery-powered projects.
ULP LP RISC-V core: An ultra-low-power co-processor for deep-sleep sensor polling — the main core can sleep while the ULP monitors sensors and wakes the system on events.
USB-C, Qwiic connector, and external antenna port: Modern connectivity options for sensors, peripherals, and extended Wi-Fi range.

The board measures just 62 x 26 x 10 mm (2.4 x 1.0 x 0.4 inches), making it small enough to embed in compact IoT devices.

Why Dual-Band Wi-Fi 6 on a $12 Board Matters

To understand the significance of the T-Display C5, you need to understand what Wi-Fi 6 (802.11ax) brings to the microcontroller world:

5 GHz band support: The 2.4 GHz band is increasingly congested in homes, offices, and industrial environments. The 5 GHz band offers cleaner spectrum with less interference. The ESP32-C5 is the first low-cost MCU to support both bands.
Improved power efficiency: Wi-Fi 6’s Target Wake Time (TWT) feature allows the ESP32-C5 to negotiate when it wakes up to transmit, significantly reducing power consumption in battery-operated devices.
Better performance in dense environments: Wi-Fi 6 uses OFDMA (Orthogonal Frequency Division Multiple Access) to communicate with multiple devices simultaneously, improving performance in environments with many connected devices.
WPA3 security: Wi-Fi 6 mandates WPA3, providing stronger encryption and protection against brute-force attacks compared to the WPA2 that most ESP32 boards currently use.

At $12, the T-Display C5 makes these enterprise-grade Wi-Fi features accessible to hobbyists, students, and product developers who previously had to choose between Wi-Fi 6 performance and affordability.

Meshtastic and Off-Grid IoT: The Bigger Picture

The T-Echo Card arrives at a time when off-grid mesh networking is gaining traction across multiple use cases. The Meshtastic project, which provides open-source firmware for LoRa-based mesh devices, has grown significantly since its inception. Devices running Meshtastic can:

Send text messages across mesh networks spanning several kilometers
Share GPS positions for group tracking and asset monitoring
Transmit sensor data (temperature, humidity, air quality) from remote locations
Operate entirely without internet — no SIM card, no Wi-Fi, no subscription

The open-source nature of Meshtastic means the firmware is free, the protocol is documented, and the community actively develops new features. For Indian IoT engineers working on agricultural monitoring, disaster response systems, or industrial site communication, Meshtastic-compatible hardware like the T-Echo Card provides a cost-effective platform that doesn’t depend on cellular infrastructure.

LILYGO’s T-Echo Card is the latest in a growing ecosystem of Meshtastic-compatible devices, joining products from Heltec (WiFi LoRa 32 V4 with solar charging), RAKwireless (WisMesh Pi HAT for Raspberry Pi gateways), and others. The diversity of hardware options is driving adoption by giving developers choices that match their specific deployment requirements.

Open-Source Hardware: Both Boards Are Fully Documented

Both the T-Echo Card and T-Display C5 are supported through LILYGO’s GitHub repositories and wiki documentation. This includes:

Board schematics and PCB layout files
Example Arduino sketches and ESP-IDF projects
Pin mapping tables and peripheral configuration guides
Flashing instructions for both Arduino IDE and ESP-IDF

For the ESP32-C5 specifically, the Arduino Core for ESP32 now includes stable support as of the ESP-IDF v6.0 release in March 2026. This means Arduino developers can target the ESP32-C5 using the same familiar Arduino IDE workflow they already know — no need to learn a new toolchain.

The T-Display C5 is listed at $12 on LILYGO’s product page (though it currently shows as sold out due to high demand). The T-Echo Card is available at $60 with selectable frequency options and an optional magnetic USB cable.

Frequently Asked Questions

What is the Meshtastic firmware and why does it matter?

Meshtastic is open-source firmware that turns compatible LoRa hardware into a decentralized mesh network. Devices can relay messages from other devices, extending range without centralized infrastructure. It’s used for off-grid communication, GPS tracking, and sensor data transmission in areas without cellular coverage.

Can I use the ESP32-C5 T-Display C5 with Arduino IDE?

Yes. ESP-IDF v6.0, released in March 2026, promoted the ESP32-C5 from preview to stable support. Both Arduino IDE and ESP-IDF projects can now target the ESP32-C5 with production-grade tooling. Add the ESP32 board package URL to Arduino IDE’s preferences and select the ESP32-C5 board.

How long can the T-Echo Card run on solar power alone?

The T-Echo Card includes a 0.25W solar panel that can maintain operation in sunny outdoor environments. Actual battery life depends on transmission frequency, LoRa power settings, and solar conditions. In typical Meshtastic configurations with periodic GPS updates, the device can operate indefinitely with adequate sunlight.

What is the difference between 2.4 GHz and 5 GHz Wi-Fi on the ESP32-C5?

The ESP32-C5 supports both 2.4 GHz (longer range, more interference) and 5 GHz (shorter range, cleaner spectrum) Wi-Fi bands. The 5 GHz band is less congested in urban and industrial environments, providing more reliable connections. Wi-Fi 6 also adds power-saving features like Target Wake Time for battery-operated devices.

Is the T-Echo Card waterproof?

Yes, the T-Echo Card carries an IP66 rating, meaning it is protected against dust ingress and powerful water jets from any direction. This makes it suitable for outdoor deployments in rain, snow, and dusty industrial environments.

Where can I buy these boards?

Both boards are available through LILYGO’s official product pages and authorized distributors including AliExpress and selected electronics retailers. The T-Display C5 is priced at $12 and the T-Echo Card at $60. Check LILYGO’s GitHub and wiki for the latest availability information.

This article was originally published on justLast.in on July 14, 2026. Sources: Lunar Computer, Hackaday, LILYGO GitHub, IoT Now News, RFID Journal.

LILYGO Unveils Solar-Powered LoRa Card and ESP32-C5 Wi-Fi 6 Dev Board for Open-Source IoT