TrackSenger
Compact Meshtastic-compatible LoRa communicator with push-button keyboard, built around the Heltec Wireless Tracker with ESP32-S3, SX1262 LoRa, GPS, and a 0.96" TFT display for off-grid mesh messaging.
$30.04
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Specifications
Components
Dual-core WiFi & BLE 5.0 MCU
LoRa Sub-GHz transceiver (863-928 MHz, +21 dBm TX, -134 dBm sensitivity)
Dual-band multi-GNSS receiver (GPS, GLONASS, BDS, Galileo, NAVIC, QZSS)
262K-color TFT LCD controller/driver with SPI interface
Bus Interfaces
GPIO Map
The TrackSenger is a compact, portable Meshtastic LoRa communicator designed by Peter "Bobricius" Misenko as part of the Armachat family of off-grid messaging devices. It wraps the Heltec Wireless Tracker V1.1 module in a custom multi-layer PCB that adds a full push-button keyboard for text-based messaging over the Meshtastic LoRa mesh network.
Design
The TrackSenger uses a clever PCB sandwich design where the Heltec Tracker's built-in 0.96" TFT display is exposed through a cutout in the upper PCB layer. The upper layer provides labeled push-buttons arranged in a QWERTY-style layout for composing messages. The keyboard section can be detached and reconnected via a 12-pin connector, and two keyboard cover options are available.
Connectivity
Built on the ESP32-S3 with an SX1262 LoRa transceiver, the TrackSenger supports long-range mesh communication on 863-928 MHz bands. The onboard UC6580 dual-band GNSS receiver provides accurate positioning with support for GPS, GLONASS, BDS, Galileo, NAVIC, and QZSS constellations. WiFi 802.11 b/g/n and Bluetooth LE 5.0 are also available via the ESP32-S3.
Firmware
The TrackSenger runs Meshtastic firmware with a dedicated "TrackSenger" target in the Meshtastic web flasher (thanks to Thomas Gottgens). Support for the original Armachat platform is planned for a future firmware release.
Availability
Available on Tindie in multiple configurations: bare PCB ($9.99), PCB with keyboard ($24.99), or fully assembled with Heltec Tracker board ($108.99). Also available on Lectronz.
Related Projects
The MechSenger is a single-board variant by the same creator featuring a mechanical keyboard and a larger 2.42" OLED display, designed to fit in Peli-style waterproof cases for rugged field use.
Use Cases
5LoRa Mesh Networking
Building off-grid mesh communication networks using LoRa radio for text messaging, location sharing, and sensor data relay without cellular or internet infrastructure.
Off-Grid Communication
Text messaging and data exchange in areas without cellular or internet coverage.
GPS Tracking
Location tracking and navigation using GNSS satellite receivers.
Portable Terminal
Handheld computing device with keyboard and display for field use and on-the-go interaction.
Field Data Logger
Battery-powered device for recording sensor data, GPS coordinates, and environmental measurements in the field.
Resources
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Available Software
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