SN50V3-MS General-Purpose Mesh Node

1. Product Overview

SN50V3-MS is a solar-powered Dragino general-purpose Mesh Node. It communicates with a Mesh gateway through a LoRa Mesh network and is suitable for outdoor IoT applications that require long range, low power consumption, and multi-hop coverage.

The standard SN50V3-MS mainly reports its battery level and operating status and is not configured for a specific external sensor. The device provides multiple hardware I/O resources and can be used with model-specific firmware to connect sensors or external devices as required by a project.

2. Applications

• Remote device access for agriculture, parks, and outdoor facilities.
• Low-power monitoring projects where site power and cabling are difficult.
• Areas that cannot communicate directly with a Mesh gateway and require relaying through other Mesh Nodes.
• Custom projects requiring digital inputs, serial interfaces, I2C, or OneWire devices.
• Long-term deployments requiring solar power and an outdoor enclosure.

3. Main Features

note

Payload to be added

• LoRa Mesh wireless communication with multi-hop relaying between nodes.
• STM32WLE5 low-power wireless MCU.
• S-type outdoor enclosure, solar panel, and 3000 mAh rechargeable lithium battery.
• Reports battery voltage, battery level, and operating status.
• Provides digital I/O, UART, I2C, OneWire, and controlled power output resources.
• Supports firmware upgrades through USB serial or PC BLE.
• Automatically wakes and reports on a configured schedule, then returns to low-power sleep.

4. Enclosure and Installation Reference

For product photos, S-type enclosure dimensions, mounting holes, and cable outlet specifications, refer to the LS version on the SN50V3-LB/LS product page.

5. Hardware Specifications

Item	Specification
MCU	STM32WLE5, 48 MHz ARM Cortex-M4
Flash	256 KB
RAM	64 KB
Radio	STM32WLE5 integrated sub-GHz LoRa radio
Power supply	Solar panel + 3000 mAh rechargeable lithium battery
Main board operating voltage	Approximately 2.5 V - 3.6 V
Main board operating temperature	-40 C - 85 C; battery operating temperature is subject to the battery specification
Local interfaces	3.3 V UART, BLE
Antenna	Sub-GHz LoRa antenna matching the shipping Region

Confirm the device Region and antenna configuration from the product label and order information.

6. Hardware I/O Resources

Hardware Resource	Description
BAT output	Connected directly to the battery; voltage varies with battery condition, approximately 2.6 V - 3.6 V
Controlled 5 V output	Provides a controlled power supply for an external sensor
Digital I/O	Up to 3 interrupt or digital input/output hardware resources
OneWire	Up to 3 OneWire hardware resources
UART	1 external UART hardware resource
I2C	1 external I2C hardware resource

The table above indicates that the device has the corresponding hardware interfaces. Whether an external sensor can be used directly depends on whether the SN50V3-MS has firmware that supports that sensor. Wiring a sensor alone does not automatically produce sensor data.

Before connecting an external device, confirm the following:

1. The operating voltage and current of the external device meet the interface requirements.
2. The firmware supports the sensor or external device.
3. The wiring is correct and suitable waterproofing and insulation are provided for outdoor use.
4. The Mesh gateway supports displaying data from the device.
5. The power consumption of the external device is suitable for the site's solar and battery conditions.

7. Device Data

The standard SN50V3-MS sends the following information to the Mesh gateway:

• Device battery level.
• Device battery voltage.
• Device online and operating status.

The standard model has no fixed sensor data. To connect temperature and humidity, digital, counter, serial, or other sensors, use product firmware that supports the target sensor. The Mesh gateway displays the corresponding data according to the functions supported by that firmware.

8. Normal Operation

After enrollment, the device automatically wakes on the configured schedule, reports its battery and device status, and then returns to low-power sleep. A device with sensor-specific firmware collects and sends the corresponding sensor data after waking, then returns to sleep.

To report immediately, first wake the device if it is sleeping. After the device is active, hold the button and release it within 1 to 3 seconds to trigger a manual report.

9. Quick Start

9.1 Installation

1. Confirm that the product label shows SN50V3-MS and that the device and antenna Region are suitable for the deployment location.
2. Install the LoRa antenna before powering on the device.
3. Install the solar panel in a location with stable, unobstructed sunlight.
4. Secure the S-type enclosure with the cable outlet facing downward, and provide a drip loop for outdoor cables.
5. If the external I/O is not being used, keep the cable outlet and waterproof connector sealed.
6. Install the antenna away from large metal surfaces, high-power electrical equipment, and enclosed metal boxes.

9.2 Initial Enrollment

For complete instructions, see Quick start — 2. First network test.

10. Power Consumption and Solar Power

Actual battery life depends on:

• Automatic wake-up and reporting interval.
• Mesh network coverage and number of relay hops.
• Operating and standby power consumption of external sensors.
• Solar panel orientation, sunlight, obstruction, and dust accumulation.
• Ambient temperature and battery condition.

Shortening the reporting interval, keeping the device awake for long periods, or connecting high-power external devices increases power consumption. Evaluate the deployment using the worst seasonal sunlight conditions at the site and clean the solar panel regularly.

11. Troubleshooting

Issue	Solution
The Mesh gateway cannot find the device	Confirm that the gateway and device use the same Region, check that the antenna is installed, and hold the button for about 1 second to wake the device
The device is enrolled but has no sensor data	The standard SN50V3-MS is not configured for an external sensor; confirm that firmware supporting the target sensor is installed
No data is shown after connecting an external sensor	Check the power supply and wiring, and confirm that both the device firmware and Mesh gateway support the sensor
The device does not report immediately	The device may be sleeping; wake it, then hold the button and release it within 1 to 3 seconds
The battery level continues to fall	Check solar panel orientation, obstruction, dust, cable connections, and ambient temperature, and confirm that external device power consumption is not excessive
The device frequently goes offline	Check the antenna, installation position, site obstructions, Mesh gateway status, and battery level
The device behaves abnormally after an upgrade	Confirm that the firmware matches the SN50V3-MS model and shipping Region