# project — Open Hardware Directory

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**2 project listed.**

## T-Echo LoRa APRS Tracker Firmware

Ultra-low-power custom APRS tracker firmware for the LILYGO T-Echo that uses the nRF52840's deep-sleep modes to achieve 100 µA standby current while transmitting GPS positions over LoRa.

[Details](https://openhardware.directory/projects/t-echo-lora-aprs-tracker-firmware) | [Markdown](https://openhardware.directory/projects/t-echo-lora-aprs-tracker-firmware/md)

## ThinkNode M1 Firmware, 3D Files, and Example Code Repository

Official Elecrow GitHub repository for the ThinkNode M1 containing factory firmware, 3D CAD enclosure files, component datasheets, and example code for the nRF52840-based LoRa Meshtastic transceiver with SX1262 radio and SSD1681 e-paper driver.

[Details](https://openhardware.directory/projects/thinknode-m1-firmware-repository) | [Markdown](https://openhardware.directory/projects/thinknode-m1-firmware-repository/md)