---
title: "MQTT"
date: 2025-01-27
draft: false
description: "a description"
tags: ["mqtt", "esp"]
---
# MQTT
An Mqtt server can be configured and will be used to dump all kinds of statistical data.
|Topic|Example|Description|
|/firmware/address|
| Topic | Example | Description |
|----------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------|
| firmware/address | 192.168.1.2 | The Ip address in station mode |
| firmware/githash | feature/esp32c6@1ce4d74a | The branch and hash during build time |
| firmware/buildtime | 2025-01-21T20:56:18.168163570Z | Compile time |
| firmware/last_online | 2025-01-22T08:56:46.664+01:00 | Last time this board was online |
| firmware/ota_state | Partition state is ESP_OTA_IMG_VALID | The OTA state, relevant for rollback |
| firmware/partition_address | 0x10000 | The OTA partition used, 0x10000 is ota_1 |
| state | online | Current State, expected are online or sleep |
| battery | {
"voltage_milli_volt":"12860",
"current_milli_ampere":"-16",
"cycle_count":"12",
"design_milli_ampere":"6000",
"remaining_milli_ampere":"806",
"state_of_charge":"15",
"state_of_health":"93",
"temperature":"2957"
} | Dump of battery data |
| water | {
"enough_water":true,
"warn_level":false,
"left_ml":1337,
"sensor_error":false,
"raw":0,"water_frozen":
"tank sensor error"
} | Water Status dump |
| plant1 | {
"a":"disabled",
"a_raw":"0",
"b":"disabled",
"b_raw":"0",
"mode":"OFF",
"consecutive_pump_count":0,
"dry":false,
"active":false,
"pump_error":false,
"not_effective":false,
"cooldown":false,
"out_of_work_hour":false,
"last_pump":"N/A",
"next_pump":"N/A"
} | Plant status dump |
| light | {
"active":false,
"out_of_work_hour":true,
"battery_low":true,
"is_day":false
} | Light status dump |
| deepsleep | night 1h | Why and how long the ESP will sleep |