mirror of
https://github.com/meshtastic/meshtastic.git
synced 2024-11-14 17:44:37 -08:00
44 lines
1.5 KiB
Markdown
44 lines
1.5 KiB
Markdown
---
|
|
id: serial-module
|
|
title: Serial communication module
|
|
sidebar_label: Serial communication
|
|
---
|
|
import PluginModule from '@site/docs/_blocks/_plugin_module.mdx';
|
|
|
|
## About
|
|
|
|
This is a simple interface to send messages over the mesh network by sending strings over a serial port.
|
|
|
|
Default is to use RX GPIO 16 and TX GPIO 17.
|
|
|
|
<PluginModule />
|
|
|
|
## Basic Usage:
|
|
|
|
1. Enable the module by setting `serial_module_enabled` to `1`.
|
|
2. Set the pins (`serial_module_rxd` / `serial_module_rxd`) for your preferred RX and TX GPIO pins. On tbeam boards it is recommended to use:
|
|
- RXD 35
|
|
- TXD 15
|
|
3. Set `serial_module_timeout` to the amount of time to wait before we consider your packet as "done".
|
|
4. (Optional) In serial_module.h set the port to `PortNum_TEXT_MESSAGE_APP`if you want to send messages to/from the general text message channel.
|
|
5. Connect to your device over the serial interface at `38400 8N1`.
|
|
6. Send a packet up to 240 bytes in length. This will get relayed over the mesh network.
|
|
7. (Optional) Set `serial_module_echo` to `1` and any message you send out will be echoed back to your device.
|
|
|
|
:::note
|
|
The device must be restarted after the settings have been changed for the module to take effect.
|
|
:::
|
|
|
|
## TODO (in this order):
|
|
|
|
- Define a verbose RX mode to report on mesh and packet information.
|
|
|
|
:::note
|
|
This won't happen any time soon.
|
|
:::
|
|
|
|
## Known Problems
|
|
|
|
- Until the module is initialized by the startup sequence, the TX pin is in a floating state. Device connected to that pin may see this as "noise".
|
|
- Will not work on NRF and the Linux device targets.
|