Meshtastic® is a project that lets you use inexpensive LoRa radios as a long range off-grid communicator for areas without reliable cellular service. These radios are great for hiking, skiing, paragliding - essentially any hobby where you don't have reliable internet access. Each member of the mesh can send and view text messages and enable optional GPS based location features.
The radios automatically create a mesh to forward packets as needed, so everyone in the group can receive messages from even the furthest member. The radios will optionally work with your phone, but no phone is required.
Meshtastic uses LoRa for the long range communications and depending on settings used, the maximum theoretical group size ranges from 30-200 device nodes. Currently, each device can only support a connection from a single user at a time.
The easiest way is to [buy a device with the software already installed](https://www.aliexpress.com/item/4001178678568.html). Other devices are [available](/docs/hardware/supported/tbeam). In the Americas get the 915MHz version, in Europe the 868MHz, or Asia 923MHz. See this listing by [The Things Network](https://www.thethingsnetwork.org/docs/lorawan/frequencies-by-country.html) for frequencies by specific countries.
When it arrives, install your antenna and make sure you install the battery correctly. Reversing the battery can damage your device. Make sure the antenna is on when you power up the board.
:::caution
Make sure not to power the radio on without first attaching the antenna! You could damage the radio chip!
Firmware can be downloaded from the [Downloads](/downloads) page. Your initial installation has to happen over USB from your Mac, Windows, or Linux PC. Once our software is installed, all future software updates happen over Bluetooth from your phone.
If your device already has Meshtastic flashed to it, you can update it over the air (OTA). Otherwise, you'll need a computer and a **data** USB cable. This can be done in the following ways:
The firmware installation method will also depend on whether you have an ESP32 based device or a nRF52 based device. See our [hardware section](/docs/hardware) to determine which microcontroller your device is based on.
If you have at least two radios with the Meshtastic firmware, you may consider connecting one via USB and the other battery powered. Communicate with the USB radio using a CLI like [Meshtastic-python](https://meshtastic.org/docs/software/python/python-installation).
- Ensure the region is set appropriately. If the radios are 915 MHz and you are in the US, then no region changes/settings are necessary. If you are in another region, you may need to run something like: `meshtastic --set region EU865`.
- Note: The radio connected via USB will not show messages sent.
- After a few seconds the other radios will show the message. You may need to press one of the buttons on the other radio to see if the message arrived.
- Configure the _wifi_ssid_ and _wifi_password_. `meshtastic --set wifi_ssid 'xxx' --set wifi_password 'yyy'` (where xxx and yyy are the appropriate values for your network)
- If you want to switch back to Bluetooth, you will need to set the _wifi_ssid_ and _wifi_password_ values to blank values (ex: `meshtastic --set wifi_ssid '' --set wifi_password ''`).
For any issues during setup, search [our forum](https://meshtastic.discourse.group) to find a solution. If you can't find one, please post your problem and provide as much detail as possible.
