(Quickstart for existing Meshtastic users with Python CLI)

Meshtastic® is a project that enables you to use inexpensive LoRa radios as a long range off-grid communication platform in areas without existing or reliable communications infrastructure. This project is 100% community driven and open source!

https://meshtastic.org/docs/introduction/

Meshtastic provides a phone app that looks and feels similar to other messaging apps, except that it does not require any cellular data or Wi-Fi. Instead, communications take place over a network of devices (nodes) that are owned and operated by the users, with nodes relaying messages to other nodes in range (typically several kilometers).

Meshtastic is a great platform with opportunities to observe and experiment with radio communications in the real world, urban and outdoors. The software, firmware and protocol are open source and extensible; the protocol can send GPS coordinates, telemetry such as weather data, GPIO sensors and more. Various integrations for other software to send data over Meshtastic have also been written e.g. ATAK.

For more information about the LoRa modulation/encoding Meshtastic uses, have a read of what is LoRa.

• Off-grid communications
  • Backcountry hiking, cycling etc.
  • Unreliable/outside of cell coverage
• Decentralized, off-cloud communications
• Disaster Response/Search And Rescue
• Tactical situational awareness (e.g.: ATAK)
• Sensor networks (environment sensors, GPIO sensors)
• And more!

Do not power up LoRa boards without an antenna attached, the transmitter may get damaged by the reflected signal

Minimum hardware needed to get connected:

1. Meshtastic Device
2. Meshtastic Software i.e. a client device
3. Antenna

When ordering, select the 923 MHz option if available, otherwise, 915 MHz, or 868 MHz if no other 900 MHz band is available

The device hardware for 868/915/923 MHz selection is the same, just with different antennae in the box; 433 MHz has hardware differences and can't be used for 900 MHz band

• Portable All-In-One Devices (screen, battery, GPS, antenna, sensor(s), enclosure, nrf52840-based - lower power consumption)
  • Heltec Mesh Node T114 - US$ 41.70 (LCD + GPS)
  • Elecrow
    • ThinkNode M1 - US$ 57.90
    • ThinkNode M2 - US$ 43.90
  • LILYGO
    • T-Echo - US$ 54.41 (US$ 62.46 with Bosch BME280 sensor)
    • T-Deck Plus - US$ 52.66 (standalone device with keyboard, ESP32 based - higher power consumption)
  • RAK Wireless
    • WisMesh Pocket V2 - US$ 99.00
    • WisMesh Board ONE - US$ 46.97 (US$ 65.97 with GPS)
• Portable All-In-One Kits (screen, battery, GPS, antenna, sensor(s))
  • LILYGO T-Beam Supreme - US$ 44.17 with Quectel L76K GPS, US$ 70.17 with u-blox MAX-M10S (BYO 18650 battery)
  • LILYGO T-Beam - US$ 32.80 (BYO 18650 battery)
  • LILYGO T-Deck - US$ 52.66 (standalone device with keyboard)
• Outdoor Devices
  • Seeed Studio
    • SenseCAP Solar Node P1 for Meshtastic - US$ 69.90
    • SenseCAP Solar Node P1-Pro for Meshtastic - US$ 89.90 (with GPS and 4× 18650 batteries)
• DIY Kits (screen, antenna, optional battery; suitable for home/office use or powering with USB power bank)
  • LILYGO T3-S3 - US$ 17.58
  • Heltec WiFi LoRa 32(V3) - US$ 17.90
  • Heltec Wireless Stick Lite v3 - US$ 14.90 (no screen)

Some Heltec ESP32-based devices are missing USB-C Configuration Channel resistors, so USB-C PD compliant supplies will likely not supply power. Using a USB-A to USB-C cable solves this issue. LILYGO boards have the correct CC resistors (i.e. 5.1 kΩ from pins CC1 and CC2 to ground) and do not have this issue.

Connects to the Meshtastic node over Bluetooth LE, USB serial or Wi-Fi. Optional if you have a standalone node with keyboard.

• Android device + Meshtastic Android app
• iOS device + Meshtastic iOS App
• Desktop device + Python CLI or Web Client (I don't recommend it for first time users)

• With appropriate frequency for configured region
• 915 MHz are usually fine for SG_923 (LongFast default frequency is 917.125 MHz)
• Some devices bundle an antenna, they may not have best resonance at 923 MHz but are good enough to start with

• Buyer's Guide: Antennae
• Ziisor TX915-JKD-20 - SMA 3.5 dBi hinged dipole; datasheet; purchase link: Taobao
• Ziisor TX915-JZLW-15 - U.FL 3 dBi fixed dipole; datasheet; purchase link: Taobao

• Battery
  • For mobile nodes that have battery connectors and onboard lithium-ion chargers
  • For battery backup of stationary nodes
  • Buyer's Guide: Batteries
• Solar power for hard-to-access nodes
  • Bypass the DC-DC buck-boost connector on the USB-A end of the cable if using a LoRa board with built-in battery/solar charging IC to avoid the extra conversion loss
  • Buyer's Guide: Solar Power
• IP-rated enclosure for outdoor nodes

Flash the latest firmware with the Meshtastic web flasher.

1. Appropriate USB COM port drivers must be installed (Windows/MacOS), e.g. Silicon Labs CP210x VCP drivers
2. Put the device into programming mode
3. Select your board and the latest firmware at Meshtastic web flasher
4. Follow the on-screen instructions to put the device in bootloader/DFU mode
5. Click Flash, Continue
6. Select Full Erase and Install if this is the first time installing Meshtastic, this will wipe any leftover data from factory programming

A freshly installed Meshtastic device must have its region set, which limits the LoRa radio to operate within local regulatory restrictions; the Meshtastic device will not transmit until the region is set. The exact firmware limits for each region can be found in the firmware definitions.

Devices are only visible to, and can only communicate with, devices configured with the same region.

• Android/iOS Client: When you first connect, you will be prompted to configure the region; select SG_923/Singapore 923.
• Python CLI: meshtastic –set lora.region 18

Usable regions in Singapore:

• EU_433
  • Frequency band: 433 - 434 MHz
  • ERP: 10 mW (10 dBm)
  • Duty cycle: 10%
  • IMDA TS SRD band: 26a
  • You will need a 433 MHz Meshtastic device (868/915/923 MHz devices do NOT support 433 MHz)
• SG_923 ← use this, it has higher output power, no duty cycle restriction and is also allocated to LPWAN
  • Frequency band: 917 - 923 MHz
  • ERP: 100 mW (20 dBm)
  • IMDA TS SRD band: 30d (not 30b/30c as Meshtastic is not LPWAN)
  • You will need an 868/915/923 MHz Meshtastic device (433 MHz devices do NOT support 923 MHz)
• Do not use regions not listed above as they will encroach on other spectrum users

Because we don't currently have enough nodes in Singapore to form a full mesh, we need to enable MQTT forwarding to use the Internet as a backhaul to forward messages between isolated nodes and meshes. The node must either be connected to Wi-Fi directly (mesh router-client to MQTT bridge), or be paired with an Android or iOS device with “MQTT Client Proxy” enabled (mobile node).

In future, when a full mesh is formed, MQTT can be disabled for a truly decentralized and private mesh, or left enabled as a backup in case of dead zones in the mesh.

Your personal data (sensor, position, telemetry, etc.) are sent out to the public Internet with this configuration. Disable the MQTT module if you are not comfortable with this. You can also decrease position precision in each channel's settings, and Position → Map Report.

• Android/iOS Client:
  1. In Modules → MQTT
     1. Enabled: on
     2. MQTT Client Proxy: on (Portable nodes with BLE to phone only)
     3. MQTT server: mqtt.lucifernet.com
  2. In Channels
     1. LongFast → MQTT Uplink: on; MQTT Downlink: on
• Python CLI:
  1. meshtastic –set mqtt.enabled true
  2. Portable nodes with BLE to phone only: meshtastic –set mqtt.proxy_to_client_enabled true
  3. meshtastic –ch-set downlink_enabled true –ch-index 0 –ch-set uplink_enabled true –ch-index 0 –ch-set downlink_enabled true –ch-index 1 meshtastic –ch-set uplink_enabled true –ch-index 1

Turning Wi-Fi on turns BLE off, so further configuration will have to be done over the Web Client, Android client or Python CLI.

• Android/iOS Client:
  1. In Device Configuration
     1. Device Role: Router & Client
     2. Network: Configure Wi-Fi accordingly (you will lose connectivity at this point on the iOS app)
     3. Position:
        1. Device GPS: Off
        2. Fixed Position: On
• Python CLI:
  1. meshtastic --set device.role ROUTER_CLIENT --set network.wifi_enabled true --set network.wifi_ssid "your network" --set network.wifi_psk yourpassword
  2. meshtastic --set position.fixed_position true --setlat x.x --setlon y.y --setalt z.z

Requirements:

• Must be installed on a ROUTER or ROUTER_CLIENT node.
  • This is an artificial limitation, but is in place to enforce best practices.
  • Router nodes are intended to be always online. If this module misses any messages, the reliability of the stored messages will be reduced.
• ESP32 Processor based device with onboard PSRAM (T-Beam > v1.0, T3S3, and maybe others).

• Android/iOS Client:
  1. In Settings → Module Configuration → Store & Forward: On
• Python CLI:
  1. meshtastic --set store_forward.enabled true

To find GPS coordinates for your address, you can use the Google Maps geocoding demo Please write to me@ndoo.sg if you have a site to offer for a Wi-Fi to MQTT router; we will sponsor the hardware.

Meshtastic devices are primarily development boards, thus being bare PCBs; many also use U.FL/IPEX connections for their LoRa antenna, which are extremely fragile. For your Meshtastic device to leave your desk, you are likely to want an enclosure.

Have a look at Device Enclosures for some ideas and recommendations.

If you have used Meshtastic before and just want to switch over to SG_923, here is a configuration file to quickly configure your device for SG_923, and an MQTT server operated by 9W2LWK.

Your personal data (sensor, position, telemetry, etc.) are sent out to the public Internet with this configuration.

Disable the MQTT module if you are not comfortable with this. You can also decrease position precision in each channel's settings, and Position → Map Report.

1. Download SG_923_lucifernet.yaml
   1. Linux/MacOS CLI
      curl -O "https://raw.githubusercontent.com/ndoo/meshtastic-config-my-sg/refs/heads/main/SG_923_lucifernet.yaml" || wget "https://raw.githubusercontent.com/ndoo/meshtastic-config-my-sg/refs/heads/main/SG_923_lucifernet.yaml"
   2. Windows CLI
      curl -O "https://raw.githubusercontent.com/ndoo/meshtastic-config-my-sg/refs/heads/main/SG_923_lucifernet.yaml"
2. Install/upgrade Meshtastic Python CLI
   pip3 install –upgrade meshtastic || install meshtastic
3. Deploy the configuration
   python3 -m meshtastic –configure SG_923_lucifernet.yaml

Android/iOS app: Skip ahead to First Use Configuration

- Data Rates

• Windows 11's built in Python binaries did not work out of the box with Meshtastic, I had to install Python's official release for Windows to successfully install Meshtastic; steps:
  1. Install latest Python from Python Releases for Windows (don't forget to add this Python to PATH during install)

  2. python3 -m pip install --upgrade pip

  3. pip3 install meshtastic

• Entering download mode on ESP32-C3 (and most other ESP32 based boards):
  • Warm reset (useful if disconnecting power is inconvenient, e.g. battery is encased)
    1. Hold BOOT
    2. Tap RST
    3. Release BOOT after 2 seconds
  • Cold reset
    1. Remove all power sources (USB, battery, solar, etc.)
    2. Hold BOOT
    3. Insert power supply
    4. Release BOOT after 2 seconds