# Elecrow ThinkNode M1

> Compact Meshtastic LoRa transceiver with nRF52840, SX1262, 1.54\" e-paper display, GPS, and 1200mAh battery for off-grid mesh communication.

## Quick Facts

- **Brand:** Elecrow
- **Board Type:** meshtastic-transceiver
- **Price:** ~$53.9
- **Product Readiness:** consumer
- **CPU:** ARM Cortex-M4F @ 64MHz, FPU, DSP, HW crypto (CryptoCell-310)
- **CPU Architecture:** ARM Cortex-M4F
- **CPU Cores:** 1
- **RAM:** 256KB SRAM
- **Flash:** 1MB internal + 2MB external QSPI
- **USB:** USB-C 2.0
- **Power:** 5V + LiPo
- **Operating Voltage:** 3.3V
- **Operating Temp:** -10°C to +50°C
- **Dimensions:** 82 × 51.6 × 26.3mm (with case: 118.5 × 52.1 × 25mm)
- **Weight:** 58g (81g with case)
- **Battery:** 1200mAh
- **Charging Port:** USB-C
- **Antenna:** RP-SMA (LoRa)
- **Display:** 1.54" E-Paper 200×200

## Connectivity

- **Bluetooth:** BLE 5.0
- **Lora:** SX1262 868/915MHz +22dBm

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Certifications

CE, FCC

## Compatible Firmware

meshtastic, meshcore, arduino

## Use Cases

- lora-mesh-networking
- off-grid-communication
- emergency-communication
- gps-tracking
- outdoor-recreation
- field-data-logger

## Components

- **nRF52840** (mcu): Nordic Semiconductor nRF52840 SoC with ARM Cortex-M4F at 64MHz, 256KB RAM, 1MB flash, BLE 5.0, and hardware crypto (CryptoCell-310). Ultra-low power with 5.6uA standby current. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.nordicsemi.com%2Fbundle%2FnRF52840_PS_v1.9%2Fresource%2FnRF52840_PS_v1.9.pdf&ref=openhardware.directory&product=elecrow-thinknode-m1&source=md-export)
- **SX1262** (radio): Semtech SX1262 LoRa transceiver supporting 868MHz and 915MHz bands with up to +22dBm transmit power. Enables long-range mesh communication via the Meshtastic protocol. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.sparkfun.com%2Fassets%2F6%2Fb%2F5%2F1%2F4%2FSX1262_datasheet.pdf&ref=openhardware.directory&product=elecrow-thinknode-m1&source=md-export)
- **SSD1681** (display-driver): Solomon Systech SSD1681 e-paper controller driving a 1.54-inch 200x200 monochrome EPD panel via SPI. Provides ultra-low power display with image retention without power, ideal for battery-operated devices. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.buydisplay.com%2Fdownload%2Fic%2FSSD1681.pdf&ref=openhardware.directory&product=elecrow-thinknode-m1&source=md-export)
- **L76K** (gps): Quectel L76K compact GNSS module with 32 tracking channels supporting GPS, GLONASS, BeiDou, and QZSS constellations. 29mA tracking current, -162dBm sensitivity, connected via UART. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Ffiles.waveshare.com%2Fupload%2Fd%2Fdb%2FQuectel_L76K_Hardware_Design_V1.0.pdf&ref=openhardware.directory&product=elecrow-thinknode-m1&source=md-export)

## Protocols

- **SPI** (SPI0): MISO: GPIO23, MOSI: GPIO22, SCK: GPIO19, CS: GPIO24 (LoRa)
- **SPI** (SPI1): MOSI: GPIO29, SCK: GPIO31, CS: GPIO30 (E-Paper), DC: GPIO28
- **I2C** (Wire): SDA: GPIO26, SCL: GPIO27
- **UART** (GPS): TX: GPIO40, RX: GPIO41

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO19 | SPI0 SCK (LoRa) | SPI | digital-output |
| GPIO22 | SPI0 MOSI (LoRa) | SPI | digital-output |
| GPIO23 | SPI0 MISO (LoRa) | SPI | digital-input |
| GPIO24 | SX1262 CS | SPI | digital-output |
| GPIO20 | SX1262 DIO1 | SPI | digital-input |
| GPIO17 | SX1262 BUSY | SPI | digital-input |
| GPIO25 | SX1262 RESET | — | digital-output |
| GPIO21 | SX1262 Power Enable | — | digital-output |
| GPIO29 | SPI1 MOSI (E-Paper) | SPI | digital-output |
| GPIO31 | SPI1 SCK (E-Paper) | SPI | digital-output |
| GPIO30 | E-Paper CS | SPI | digital-output |
| GPIO28 | E-Paper DC | — | digital-output |
| GPIO2 | E-Paper RESET | — | digital-output |
| GPIO3 | E-Paper BUSY | — | digital-input |
| GPIO43 | E-Paper Power Enable | — | digital-output |
| GPIO26 | I2C SDA | I2C | digital-input, digital-output |
| GPIO27 | I2C SCL | I2C | digital-input, digital-output |
| GPIO40 | GPS UART TX | UART | digital-output |
| GPIO41 | GPS UART RX | UART | digital-input |
| GPIO37 | GPS REINIT | — | digital-output |
| GPIO34 | GPS Standby | — | digital-output |
| GPIO33 | GPS Switch | — | digital-output |
| GPIO4 | Battery ADC | — | adc |
| GPIO6 | Buzzer | — | digital-output, pwm |
| GPIO38 | LED Red | — | digital-output |
| GPIO36 | LED Power | — | digital-output |
| GPIO13 | LED Green (Notification) | — | digital-output |
| GPIO42 | Button 1 | — | digital-input |
| GPIO39 | Button 2 | — | digital-input |
| GPIO35 | External Power Detect | — | digital-input |
| GPIO12 | Power Enable | — | digital-output |
| GPIO11 | Touch Sensor | — | digital-input |

## Accessories

- external-antenna

## Description

## Overview

The Elecrow ThinkNode M1 is a compact, integrated Meshtastic transceiver designed for off-grid mesh communication. Built around the Nordic nRF52840 ARM Cortex-M4F MCU and Semtech SX1262 LoRa radio, it delivers reliable long-range mesh networking at 868MHz or 915MHz with up to +22dBm transmit power. The device comes pre-loaded with Meshtastic firmware and is fully compatible with the official Meshtastic mobile app for configuration, messaging, map/location sharing, and network monitoring.

The ThinkNode M1 features a 1.54-inch e-paper display (200x200, SSD1681 driver) for ultra-low-power status readouts, a Quectel L76K multi-constellation GNSS receiver supporting GPS, GLONASS, BeiDou, and QZSS, and a built-in 1200mAh rechargeable lithium battery providing over 48 hours of continuous operation. With a standby current of just 5.6uA, the device is optimized for extended field deployments.

The integrated design includes a buzzer, RTC with battery backup, multiple control buttons (knob, function, toggle, GPS, and reset), and LED indicators for power, GPS, and LoRa status. It connects via USB-C for charging and firmware updates, and supports BLE 5.0 for phone pairing. The device ships with a durable ABS+PC protective case and an RP-SMA LoRa antenna, making it ready for immediate deployment in hiking, emergency response, and remote area communication scenarios.

## Where to Buy

- [Elecrow](https://openhardware.directory/r?to=https%3A%2F%2Fwww.elecrow.com%2Fthinknode-m1-meshtastic-lora-signal-transceiver-powered-by-nrf52840-with-154-screen-support-gps.html&ref=openhardware.directory&product=elecrow-thinknode-m1&source=md-export) — $53.90
- [Tindie](https://openhardware.directory/r?to=https%3A%2F%2Fwww.tindie.com%2Fproducts%2Felecrow%2Fthinknode-m1-lora-meshtastic-transceiver-154gps%2F&ref=openhardware.directory&product=elecrow-thinknode-m1&source=md-export) — $53.90

## Resources

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.elecrow.com%2Fthinknode-m1-meshtastic-lora-signal-transceiver-powered-by-nrf52840-with-154-screen-support-gps.html&ref=openhardware.directory&product=elecrow-thinknode-m1&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FElecrow-RD%2FThinkNode-M1-LoRa-Meshtastic-Transceiver-With-1.54-EPD-Screen-GPS-function-nRF52840&ref=openhardware.directory&product=elecrow-thinknode-m1&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwww.elecrow.com%2Fwiki%2FThinkNode-M1_Transceiver_Device%28Meshtastic%29_Power_By_nRF52840.html&ref=openhardware.directory&product=elecrow-thinknode-m1&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.elecrow.com%2Fdownload%2Fproduct%2FCIL12901M%2FThinkNode%2520M1_LoRa_Meshtastic_Transceiver_DataSheet.pdf&ref=openhardware.directory&product=elecrow-thinknode-m1&source=md-export)

## Tags

`meshtastic`, `lora`, `nrf52840`, `gps`, `e-paper`, `off-grid`, `mesh-networking`, `ble`

## Images

![Elecrow ThinkNode M1](https://nbg1.your-objectstorage.com/openhardware-directory/entities/elecrow-thinknode-m1/df3434b13ebf.jpg)
![Elecrow ThinkNode M1](https://nbg1.your-objectstorage.com/openhardware-directory/entities/elecrow-thinknode-m1/54d56ee366dd.jpg)
![Elecrow ThinkNode M1](https://nbg1.your-objectstorage.com/openhardware-directory/entities/elecrow-thinknode-m1/a85166b04326.jpg)
![Elecrow ThinkNode M1](https://nbg1.your-objectstorage.com/openhardware-directory/entities/elecrow-thinknode-m1/9cf99929930a.jpg)
![Elecrow ThinkNode M1](https://nbg1.your-objectstorage.com/openhardware-directory/entities/elecrow-thinknode-m1/979cd0e5faab.jpg)
![Elecrow ThinkNode M1](https://nbg1.your-objectstorage.com/openhardware-directory/entities/elecrow-thinknode-m1/df53e1b845df.jpg)
![Elecrow ThinkNode M1](https://nbg1.your-objectstorage.com/openhardware-directory/entities/elecrow-thinknode-m1/20443b8f7e1d.jpg)
![Elecrow ThinkNode M1](https://nbg1.your-objectstorage.com/openhardware-directory/entities/elecrow-thinknode-m1/4dd431c2a23e.jpg)
![Elecrow ThinkNode M1](https://nbg1.your-objectstorage.com/openhardware-directory/entities/elecrow-thinknode-m1/dfd4303320a9.jpg)

> **Battery Powered:** Li-Po

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