---
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 | {<br/>"voltage_milli_volt":"12860",<br/>"current_milli_ampere":"-16",<br/>"cycle_count":"12",<br/>"design_milli_ampere":"6000",<br/>"remaining_milli_ampere":"806",<br/>"state_of_charge":"15",<br/>"state_of_health":"93",<br/>"temperature":"2957"<br/>} | Dump of battery data |
| water | {<br/>"enough_water":true,<br/>"warn_level":false,<br/>"left_ml":1337,<br/>"sensor_error":false,<br/>"raw":0,"water_frozen":<br/>"tank sensor error"<br/>} | Water Status dump |
| plant1 | {<br/>"a":"disabled",<br/>"a_raw":"0",<br/>"b":"disabled",<br/>"b_raw":"0",<br/>"mode":"OFF",<br/>"consecutive_pump_count":0,<br/>"dry":false,<br/>"active":false,<br/>"pump_error":false,<br/>"not_effective":false,<br/>"cooldown":false,<br/>"out_of_work_hour":false,<br/>"last_pump":"N/A",<br/>"next_pump":"N/A"<br/>} | Plant status dump |
| light | {<br/>"active":false,<br/>"out_of_work_hour":true,<br/>"battery_low":true,<br/>"is_day":false<br/>} | Light status dump |
| deepsleep | night 1h | Why and how long the ESP will sleep |