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SN50V3-MS General-Purpose Mesh Node

SN50V3-MS

1. Introduction​

1.1 What is the SN50V3-MS General-Purpose Mesh Node?​

SN50V3-MS is a Dragino general-purpose Mesh Node for outdoor IoT applications requiring long range, low power consumption, and multi-hop coverage.

The standard SN50V3-MS reports its battery and operating status and is not configured for a specific external sensor. Its hardware provides multiple I/O resources that can be used with model-specific firmware to connect supported sensors or external devices.

1.2 Features​

  • LoRa Mesh communication with multi-hop relaying between nodes.
  • STM32WLE5 low-power wireless MCU.
  • S-type outdoor enclosure, solar panel, and 3000 mAh rechargeable lithium battery.
  • Battery voltage, battery level, and operating-status reporting.
  • Digital I/O, UART, I2C, OneWire, and controlled power-output resources.
  • Firmware upgrades through USB serial or PC BLE.
  • Automatic scheduled reporting followed by low-power sleep.

1.3 Specifications​

Common DC characteristics

ItemSpecification
Main unit operating voltageApproximately 2.5 V to 3.6 V
Main unit operating temperature-40 °C to 85 °C; battery operating temperature is subject to the battery specification

I/O interfaces

Hardware resourceDescription
BAT outputConnected directly to the battery; voltage varies with battery condition, approximately 2.6 V to 3.6 V
Controlled 5 V outputProvides a controlled power supply for an external sensor
Digital I/OUp to 3 interrupt or digital input/output hardware resources
OneWireUp to 3 OneWire hardware resources
UART1 external UART hardware resource
I2C1 external I2C hardware resource

The I/O resources are multiplexed. Their usable combination depends on the installed firmware and target sensor.

Mesh main unit

ItemSpecification
MCUSTM32WLE5, 48 MHz ARM Cortex-M4
Flash256 KB
RAM64 KB
RadioSTM32WLE5 integrated sub-GHz LoRa radio
Power supplySolar panel + 3000 mAh rechargeable lithium battery
Local interfaces3.3 V UART, BLE
AntennaSub-GHz LoRa antenna matching the shipping Region

1.4 Applications​

  • Remote device access for agriculture, parks, and outdoor facilities.
  • Low-power monitoring projects where site power and cabling are difficult.
  • Areas requiring relaying through other Mesh Nodes.
  • Custom projects using digital inputs, serial interfaces, I2C, or OneWire devices.
  • Long-term outdoor deployments requiring solar power.

1.5 Sleep Mode and Working Mode​

In the sleep state, the node disables most functions and remains in low-power standby until its next scheduled wake-up or a user action wakes it.

After enrollment, the standard working cycle is:

Reach scheduled time -> Wake up -> Prepare device or supported sensor data
                     -> Send data to the Mesh gateway
                     -> Wait for a short communication window -> Sleep

A device with sensor-specific firmware powers, reads, and reports its supported sensor during the active cycle.

1.6 Button Operations and LED Status​

Button operations and LED indications are common to Dragino Mesh Nodes. See 3.1 Button Operations and LED Status in the Mesh Quick Start for sleep, wake-up, manual reporting, restart, reset, and firmware-upgrade actions.

1.7 BLE and Local Interfaces​

SN50V3-MS provides 3.3 V UART and BLE local interfaces. BLE can be used for normal APP firmware updates from a PC through PC BLE in FirmwareUpdateUtility.

The mobile upgrade workflow is still under development.

1.8 Pin, Enclosure, and Mechanical Reference​

The following figures show the LA66S Mesh module pin definitions, solar enclosure dimensions, mounting points, cable outlets, and cable-gland size options used by SN50V3-MS.

Pin definitions

SN50V3-MS LA66S Mesh module pin definitions

Solar enclosure dimensions and mounting reference

SN50V3-MS solar enclosure dimensions, mounting points, and cable outlets

Cable-gland dimensions and size options

SN50V3-MS cable-gland dimensions for the available size options

1.9 External-Device Compatibility​

Wiring an external sensor does not automatically produce sensor data. The installed SN50V3-MS firmware and Mesh gateway must support the target sensor and its fields.

External-device compatibility

Before connecting an external device, confirm its supply voltage, peak and standby current, polarity, signal levels, wiring, interface requirements, firmware support, and expected gateway fields.

Check the following:

  1. The external device meets the electrical requirements of the selected interface.
  2. The installed firmware supports the sensor or device.
  3. The selected I/O resources are available in that firmware.
  4. Outdoor wiring has suitable waterproofing and insulation.
  5. The external device's power consumption is suitable for the site's solar and battery conditions.

1.10 Installation​

Use a cable gland that matches the external cable diameter. Keep unused cable openings sealed and install the enclosure with its cable outlets facing downward. Provide a drip loop so water does not run along a cable toward the enclosure.

After wiring an external device, test it above ground. Confirm that the sensor powers correctly, the node remains online, and the expected fields appear on the Mesh gateway before sealing the enclosure and completing the field installation.

2. Use SN50V3-MS with a Mesh Gateway​

2.1 How It Works​

The node can communicate directly with a Mesh gateway or relay its data through other awake Mesh Nodes.

The standard SN50V3-MS sends:

  • Battery level.
  • Battery voltage.
  • Device online and operating status.
  • Data update time.

The standard model has no fixed external-sensor data. When sensor-specific firmware is installed, the node collects and sends the corresponding supported fields.

2.2 Quick Guide to Connect SN50V3-MS to a Mesh Gateway​

2.2.1 Preparation​

  1. Confirm that the product label shows SN50V3-MS.
  2. Install the LoRa antenna before powering or waking the node.
  3. Place the solar panel where it receives stable, unobstructed sunlight.
  4. Keep unused cable outlets sealed.
  5. Place the node near the Mesh gateway for the first network test.

2.2.2 Enrollment and First Report​

For the complete gateway and enrollment procedure, see 2. First network test.

  1. Configure the node and Mesh gateway for the Region corresponding to the installation country and confirm that their Region settings match.
  2. Add the node to the gateway with its Dev EUI and App Key.
  3. Wake or restart the node so that it sends enrollment requests.
  4. Confirm that the Mesh gateway lists the node as enrolled.
  5. Trigger a manual report.
  6. Confirm that battery voltage, battery level, operating status, and update time appear.

2.2.3 External Sensor and Final Installation​

  1. Complete the compatibility checks in Section 1.9.
  2. Wire and test the external sensor above ground.
  3. Confirm that the installed firmware and gateway display the expected sensor fields.
  4. Seal and mount the enclosure according to Section 1.10.
  5. Trigger another report and verify the installation.

2.3 Mesh Payload​

The Mesh payload specification for this product will be added in a future documentation update.

3. Configure SN50V3-MS​

3.1 Configuration Method​

Common Mesh configuration is managed through the Mesh gateway. Use the Mesh Quick Start for the current configuration and enrollment workflow.

Product-specific behavior depends on the installed firmware and supported external sensor.

3.2 Region and Radio Preset​

New units, factory-reset units, and units whose saved configuration has been cleared start with EU868 and the LONG_FAST modem preset (SF11 / BW 250 kHz).

Before deployment, configure the node and gateway for the Region corresponding to the installation country and confirm that their Region settings match.

3.3 Scheduled and Manual Reporting​

After enrollment, the node follows the wake-up and reporting schedule provided by the Mesh gateway.

To request an immediate update:

  1. Wake the node if it is sleeping.
  2. While it is active, hold the button and release it within 1 to 3 seconds.
  3. Allow the supported device or sensor operation to finish.
  4. Confirm that the new data and update time appear on the Mesh gateway.

4. Battery & Power Consumption​

Battery performance depends on the reporting interval, Mesh coverage, relay conditions, external-sensor operating and standby current, sunlight, solar-panel orientation, ambient temperature, and battery condition.

Short reporting intervals, long active periods, or high-power external devices increase power consumption. SN50V3-MS uses a solar panel and a 3000 mAh rechargeable lithium battery.

Battery Info & Power Consumption Analyze.

5. Firmware Update​

Use only APP firmware built for SN50V3-MS, the intended external-sensor support, and the device's shipping Region.

For the firmware preparation and upload procedure, see 2. How to upload the firmware.

The mobile upgrade feature is still under development.

6. FAQ​

6.1 Can any external sensor be connected to SN50V3-MS?​

No. The sensor must meet the electrical requirements of an available interface, and the installed firmware and Mesh gateway must support that sensor. Complete the checks in Section 1.9 before connecting it.

6.2 Why does the node report battery data but no external-sensor data?​

The standard SN50V3-MS is not configured for a specific external sensor. Confirm that the installed firmware supports the connected sensor and that the gateway supports its fields.

6.3 Why does the node reset or become unstable after a sensor is connected?​

Disconnect the sensor and check its supply voltage, peak current, polarity, signal levels, wiring, and selected I/O resources before reconnecting it.

6.4 How should an outdoor installation be maintained?​

  • Inspect the antenna, enclosure mounting, cable glands, wiring, insulation, and drip loop.
  • Keep the solar panel clean and unobstructed.
  • Check for moisture or corrosion inside the enclosure.
  • When replacing an external sensor, repeat the compatibility and above-ground verification before resealing the enclosure.

For enrollment, Region, gateway connectivity, general power, or firmware-update questions, see the general Mesh FAQ.

7. Order Info​

Ordering details and Region-specific part numbers for SN50V3-MS will be added when the product options are finalized.

8. Packing Info​

Package contents, cable-hole options, dimensions, and weights for SN50V3-MS will be added in a future documentation update.

9. Support​

Dragino support is available Monday to Friday from 09:00 to 18:00 GMT+8. When requesting assistance, provide the product model, firmware identification, connected sensor, wiring information, Region, and the steps required to reproduce the problem.

Contact: Support@dragino.cc

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