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Merge pull request #951 from GUVWAF/JSONdownlink

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Update MQTT JSON downlink according to new requirements
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rcarteraz 2024-02-01 07:17:00 -07:00 committed by GitHub
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3 changed files with 16 additions and 10 deletions
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6
docs/software/mqtt/home-assistant.mdx
View file

@ -268,7 +268,7 @@ First, create an input text helper entity. The preferred way to configure an inp
### Create a Send Message Automation
This automation will check the send box for changes. After typing a message, either hit enter or click off the box and the automation will send a text string in JSON to the mqtt broker. Make sure to update the channel name and device ID in the example below.
This automation will check the send box for changes. After typing a message, either hit enter or click off the box and the automation will send a text string in JSON to the mqtt broker. Make sure to call your channel "mqtt" and to update the device ID and `from` field in the example below.
```yaml
- alias: Meshtastic - Send Automation
@ -288,9 +288,9 @@ This automation will check the send box for changes. After typing a message, ei
data:
qos: 0
retain: false
topic: msh/2/json/LongFast/!67ea9400
topic: msh/2/json/mqtt/!67ea9400
payload: >-
{"channel":"0","sender":"broker","type":"sendtext","payload":"{{
{"from":1743426560,"type":"sendtext","payload":"{{
states('input_text.meshtastic_send_box') }}"}
- delay:
hours: 0

12
docs/software/mqtt/index.mdx
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@ -96,11 +96,14 @@ The `from` field can thus be used as a stable identifier for a specific node. N
If the message received contains valid JSON in the payload, the JSON is deserialized and added as a JSON object rather than a string containing the serialized JSON.
**Sent messages** will be checked if the MQTT payload contains a valid JSON-encoded envelope:
#### JSON downlink to instruct a node to send a message
You can also send a JSON message to the topic `msh/2/json/mqtt/` to instruct a gateway node to send a message to the mesh. Note that the channel **must** be called "mqtt". The JSON message should contain the following fields:
```json
{
"sender": "SENDER",
"from": <node number>,
"type": "type",
"payload": {
"key":"value"
...
@ -108,7 +111,10 @@ If the message received contains valid JSON in the payload, the JSON is deserial
}
```
`sender` and `payload` fields are required for a valid envelope. If a valid MQTT message is found, the message is sent over the radio as a message of type `TEXT_MESSAGE_APP` with the serialized `payload` value in the message payload.
`from` and `payload` fields are required for a valid envelope (note that in firmware &lt;2.2.20 a field `sender` was required, but this is no longer the case). The `from` field should be equal to the node number of the node that will transmit the message. Optionally, you can specify a destination by setting the `to` field to the node number of the destination. If the `to` field is not set, the message will be broadcast to all nodes on the mesh.
Currently two types of messages are supported: `"sendtext"` and `"sendposition"`.
For the type `sendtext`, the `payload` should be a string containing the text to send. For the type `sendposition`, the payload should be an object with the fields `latitude_i`, `longitude_i`, `altitude` (optional) and `time` (optional).
### Basic Configuration

8
docs/software/mqtt/nodered.mdx
View file

@ -54,13 +54,13 @@ The JSON output only publishes the following subset of the messages on a Meshtas
> Protobufs are mesh native.
#### 1. Using JSON-encoded messages
Make sure that option *JSON Output Enabled* is set in MQTT module options.
Make sure that option *JSON Output Enabled* is set in MQTT module options and your channel is called "mqtt".
Below is a valid JSON envelope for information sent by MQTT to a device for broadcast onto the mesh.
```json
{
"sender":"whatever you want to be the SENDER",
"from":<node number of the transmitter>,
"type":"sendtext",
"payload": text or a json object go here
}
@ -979,11 +979,11 @@ The flow is:
]
```
Sending a position to a device for broadcast to the mesh is much easier with JSON. This introduces a new MQTT Service Envelope type: "sendposition". A valid MQTT envelope and message to broadcast lat, lon, altitude looks like this.
Sending a position to a device for broadcast to the mesh is much easier with JSON. It requires a channel called "mqtt". This introduces a new MQTT Service Envelope type: "sendposition". A valid MQTT envelope and message to broadcast lat, lon, altitude (optional) and time (optional) looks like this:
```json
{
"sender": "someSender",
"from": 2130636288,
"type": "sendposition",
"payload": {
"latitude_i": 399600000,