Elecrow ThinkNode M3

Name: Elecrow ThinkNode M3
Brand: Elecrow
Price: 40 USD

Official Active

Credit-card-sized nRF52840 + LR1110 tracker for Meshtastic/MeshCore or LoRaWAN (separate firmware SKUs). GNSS plus Wi-Fi scan and BLE beacon positioning via LR1110; temperature, humidity, and accelerometer sensors. Built-in 770 mAh battery, magnetic charging, SOS button, and IP66 enclosure. No display — BLE configuration only.

~$40 approx (2026-06)

Product page ↗ Datasheet ↗

References: mesh-sn.de ↗

MCU: nRF52840
Radio: LR1110
Display: None
GPS: Yes
Battery: 770 mAh
Connectivity: BLE

Roles

CompanionRepeaterRoom Server

Transports

ble

Variants

Purchasable options for this device

Revision	Variant	Band	SKU
—	868 MHz	EU868	ILO13903D
—	915 MHz	US915 / AU915	ILO13903D

Hardware

Radio

Technology: LORA
Chip: Semtech LR1110 ↗
Bands: EU868 US915 / AU915
TX power: 20 dBm
TX efficiency: 1.25 mW/mA
Antenna: internal

Processor

Family: Nordic nRF52 series ↗
Model: Nordic nRF52840 ↗
Architecture: ARM Cortex-M4
Flash: 1 MB
RAM: 256 KB

Input

Button: power / SOS

Battery

Battery: Supported
Built-in capacity: 770 mAh
Chemistry: LiPo
Built-in: Yes
Charging: Yes
Connector: magnetic

Power

Power draw (idle): 5 mA
Idle runtime: 154 h
Power draw (TX): 80 mA

Physical

LEDs: Status LEDs
Dimensions: 64 × 64 × 10 mm
Board area: 41 cm²
Board volume: 41 cm³
Weight: 40 g
Shell: Included
IP rating: IP66
Operating temp: -20 to 60 °C
Certifications: FCC, CE

Connectivity

Bluetooth: BLE 5.0
Wi-Fi: None

Details

Kind: Product
Lifecycle: Active
Family: elecrow-elecrow-thinknode-m3
Firmware support: 4
Catalog completeness: 93 %
Also known as: ThinkNode M3, ThinkNode M3 Tracker Card

Firmware support

Firmware	Type	Target	Status	Notes
MeshCore (Official)	Official	thinknode_m3	✓ Supported
MeshCoreNG	Fork	thinknode_m3	✓ Supported
MeshCoreTerm	Fork	—	✓ Supported	Elecrow 3.5" ThinkNode M3.
ZephCore	Custom	—	✓ Supported