Updated Pocket Computer Version 2: Compact Digital Device
The M5Stack Cardputer ADV, the second iteration in the Cardputer series, is making waves in the world of off-grid communication. This compact device boasts a range of features that make it an attractive choice for those seeking a portable Meshtastic node.
At its core, the Cardputer ADV is equipped with a microSD card slot for data storage, a BMI270 (6-axis IMU) for improved stability, and a microcontroller (Dual-Core Xtensa LX7, 240 MHz, 8 MB Flash) similar to the one used in the CoreS3A module. It also sports a 1.44-inch TFT display with 240 x 135 pixels and a 56-key alphanumeric keyboard, allowing for direct communication composition.
The Cardputer ADV is not just a simple upgrade. It comes with a 3.5mm headphone output, an amplifier, a 1W speaker (ES8311 audio codec), and an infrared transmitter. It even has a microphone, making it a potential candidate for voice communication.
One of the standout features of the Cardputer ADV is its expansion bus for external modules (Caps) on the back. With the new LoRa module (Cap), it becomes a standalone Meshtastic device, enabling off-grid communication. This module, priced at $14.50, also includes a GPS module.
However, it's important to note that firmwares for previous Cardputer versions do not work on the ADV, particularly the keyboard which requires a specific firmware. Firmware flashing for the Cardputer ADV is done via the M5Burner, similar to previous models.
The Cardputer ADV can be used like a normal Meshtastic node via a mobile phone and the Meshtastic app. Initial reports suggest that it works relatively well but may operate slowly with the standard UI (BaseUI) of Meshtastic. Devices with larger displays, such as the LiliGo T-Deck, have a significant advantage in terms of user interface with Meshtastic.
The Cardputer ADV has a bootloader that allows firmware switching without the need for a computer. It also comes with a battery capacity of 1750 mAh, ensuring that it can power your off-grid communication needs for extended periods.
For those interested in programming the Cardputer ADV, it can be done using the Arduino IDE, ESP-IDF, PlatformIO, or graphically via UiFlow2. Comprehensive information about the Cardputer, including schematics, pinouts, software links, and more, can be found on the M5Stack's website.
The manufacturer of the Meshtastic module combined with the M5Stack Cardputer ADV is RAKwireless, a company known for its widespread use of RAKWireless nRF52840 modules in Meshtastic devices and the availability of related WisBlock Meshtastic modules.
In conclusion, the M5Stack Cardputer ADV offers a unique blend of portability, versatility, and off-grid communication capabilities. Whether you're a seasoned off-grid communicator or just starting out, the Cardputer ADV might just be the device you've been looking for.
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