Tiny microcontroller improvement boards are nothing new. Neither are LoRa radios, GPS modules, or photo voltaic charging. However each on occasion, somebody manages to cram an uncommon mixture of {hardware} right into a bundle sufficiently small that it makes you begin interested by initiatives you did not know you needed to construct. The brand new LILYGO T-Echo Card is a type of gadgets.
Measuring simply 90 × 60 × 9.5 mm, the weatherproof IP66 enclosure hides a big assortment of {hardware} centered round Nordic Semiconductor’s nRF52840 microcontroller. Its Arm Cortex-M4F processor runs at 64 MHz and is paired with 1 MB of flash reminiscence, 256 KB of RAM, and a further 32 Mbit SPI flash chip for storage.
The pinout (📷: LILYGO)
However the T-Echo Card is actually all about wi-fi communication. It comes outfitted with help for Bluetooth 5, NFC, Bluetooth Mesh, Thread, Zigbee, ANT, and different 2.4 GHz wi-fi protocols supported by the nRF52840. The board additionally features a Semtech SX1262 LoRa transceiver able to working throughout the 400-520 MHz and 830-945 MHz frequency bands. A built-in L76K GNSS receiver provides help for GPS, GLONASS, BeiDou, and QZSS positioning, making the board appropriate for location-aware functions with none further modules.
The tiny onboard 0.42-inch OLED show is ideal for exhibiting standing data, whereas a digital MEMS microphone, 1 W speaker, buzzer, RGB standing LED, and a 9-axis IMU give builders loads of choices for constructing interactive gadgets. Energy comes from an 800 mAh battery that may be recharged via both a magnetic USB connector or the built-in 5 V, 0.25 W photo voltaic panel, permitting the board to stay deployed for prolonged durations with minimal upkeep.
The reverse aspect (📷: LILYGO)
That {hardware} mixture opens the door to all kinds of functions, together with off-grid textual content and voice communication, GPS location sharing, private or asset monitoring, and transportable mesh networking. Arduino example code is out there for many of the onboard {hardware}, together with the show, GPS receiver, IMU, audio features, LoRa radio, and RGB LED. One notable exception is NFC, which at the moment is not supported by the default Arduino firmware as a result of the nRF52 Arduino core lacks NFC help.
The T-Echo Card is already supported by the favored MeshCore undertaking, and Meshtastic help has additionally been merged upstream, making the board an interesting possibility for anybody eager about constructing off-grid communication networks. With a weatherproof enclosure, built-in photo voltaic charging, and a big assortment of sensors and radios, the T-Echo Card may very well be the proper addition to your toolkit. It’s at the moment selling for $58 direct from LILYGO.
