How to Choose LoRa Module Board?

Building a Meshtastic network requires selecting the right hardware. Currently, the market offers a wide variety of LoRa development boards that support flashing Meshtastic (and Meshcore) firmware.The Leading manufacturers like Heltec, RAKwireless, Seeed Studio, Lilygo, and Elecrow were among the founding members of the Meshtastic open-source community. These companies produce the most reliable hardware, and the following modules are officially supported and registered by Meshtastic:

Heltec Automation: Heltec ESP32 V3, Heltec ESP32S V4, Heltec T114 (with GPS).

RAKwireless: RAK19007 + RAK4631 (RAK4630), RAK19003 + RAK4631, RAK19007 + RAK3401 + RAK13302.

SeeedStudio: Xiao nRF52840 + SX1262, Xiao ESP32 + SX1262.

Lilygo: T3 Series, T3S3 Series, T-Beam Series (with GPS).

To help you choose the correct LoRa module for your specific needs, we will analyze them based on 3 aspects:Frequency band,Main Control Chip (MCU), and Transmission Power.

1. Choosing by Frequency Band (Region)

The first step in selecting a module is ensuring it operates on a legal frequency for your region. The three main frequency bands used globally are 915MHz, 868MHz, and 433MHz.

Frequency Reference Table:

2. Choosing by Main Control Chip (MCU)

Currently, most LoRa modules pairing with the SX1262 radio chip utilize one of two main control schemes: ESP32 or nRF52840.Your choice here depends on the trade-off between Power Consumption and Cost.

ESP32 (WiFi + Bluetooth): Low cost but higher power consumption (120-150mA). the costing between $12 - $18.

nRF52840 (Bluetooth): low power consumption (15-25mA), making them ideal for solar node. The costing between $15 - $28.

ESP32 vs. nRF52840 Comparison Table:

3. Choosing by Transmission Power (Signal Strength)

Most standard LoRa development boards on the market have a transmission power of 21dBm. However, as the Meshtastic and Meshcore ecosystems grow, there is an increasing demand for higher power to achieve longer range.High-Power LoRa modules (equipped with a Power Amplifier--PA) can build a wider mesh network and effectively reduce the cost of deployment by requiring fewer nodes to cover the same area.

1. Heltec V4 (with Screen & GPS): Ideal for use as a Mesh Radio (Mesh Tracker). Since it has a screen and GPS built-in, it is perfect for handheld use.

2. RAK19007 + RAK3401 + RAK13302 (nRF52840 1W TX Booster): This setup uses the efficient nRF52840 chip. It lacks a screen and GPS, making it the perfect candidate for a Solar Mesh Repeater or a headless Meshtastic node.since the low power consumption.

3. GAT562 30S:Includes a screen and GPS, suitable for a handheld radio node. Note: Currently, this device does not have official Meshtastic certification and cannot be flashed via the official web flasher.

High-Power LoRa Module Boards Table: