Combining Home Assistant with an ESP32 equipped with an RS485 module offers a potent programming solution for effective RS485 device control.
| Advantages | Description |
|---|---|
| Unified Automation Platform | Home Assistant acts as a unified platform, providing a central interface for managing RS485 devices. |
| ESP32's Robust Hardware | The ESP32's capabilities and GPIO pins make it suitable for seamless integration with RS485 devices. |
| RS485 Translation Capability | The ESP32's RS485 module enables bidirectional communication, effectively translating commands. |
| Real-time Monitoring and Control | Home Assistant's real-time updates and automation features allow responsive control over devices. |
| Custom Logic and Integrations | Programmers can implement custom logic and leverage Home Assistant's integrations for versatility. |
By combining the strengths of Home Assistant and an ESP32 with an RS485 module, programmers can develop a comprehensive control solution, translating commands and achieving seamless interaction with RS485 devices while benefiting from real-time monitoring and flexible automation capabilities.
Domoticz, a popular home automation software, presents compelling reasons for programmers seeking to collect logs and RS485 device data through programming.
| Advantages | Description |
|---|---|
| Logging Capabilities | Domoticz offers built-in logging features, simplifying the process of collecting event data. |
| RS485 Device Integration | The platform supports integration with RS485 devices, easing the retrieval of device data. |
| Extensive Plugin System | Its plugin system allows programmers to customize data collection and integration processes. |
| Web-based Interface | The web interface facilitates easy access to logs and device data for monitoring and analysis. |
| Community Support | Domoticz boasts an active community that provides assistance and resources for programmers. |
By harnessing the features of Domoticz, programmers can efficiently develop programs to gather logs and RS485 device data while benefiting from its extensibility and supportive community.
The integration of MQTT (Message Queuing Telemetry Transport) significantly enhances the capabilities of both Home Assistant and Domoticz in terms of power and flexibility.
| Benefits | Description |
|---|---|
| Decoupled Communication | MQTT allows devices and systems to communicate in a decoupled manner, enhancing flexibility. |
| Efficient Message Distribution | MQTT's publish-subscribe model ensures efficient distribution of data to relevant subscribers. |
| Real-time Data Streaming | MQTT enables real-time streaming of data, facilitating swift updates between devices and platforms. |
| Cross-Platform Compatibility | Both Home Assistant and Domoticz support MQTT, enabling seamless communication across platforms. |
| Integration with Third-Party Services | MQTT's popularity empowers integration with external services, expanding the system's capabilities. |
| Custom Automation and Control | MQTT enables programmers to design custom automation and control solutions with fine-grained detail. |
By incorporating MQTT into the architecture of Home Assistant and Domoticz, programmers can tap into a powerful communication protocol that enriches their systems' capabilities, providing real-time data exchange, interoperability, and the foundation for intricate automation scenarios.
For the Domoticz to understand/receive MQTT messages ESP32 needs to create and send format below
mosquitto_pub -h mqttbroker -m '{ "idx" : 1, "nvalue" : 0, "svalue" : "27.0" }' -t 'domoticz/in'
Of course when you have user and password for mqtt it needs to be aprpiatelly modified In this releasee IDx were fixed but if you want to generate them automatically then another piece written in python is required which will generate in domoticz sql appropiate records so you dont need to do that manually. If you want YAML code or more information just send me short email lencz.sla@gmail.com
Nice explanation is on webpage https://sancla.com/domoticz/mqtt-for-domoticz/
```
- platform: modbus_controller
modbus_controller_id: pv1800
setup_priority: 2
id: bs_hardware_protection
name: "Hardware Protection"
register_type: holding
address: 15213
bitmask: 0x0001
on_state:
then:
- mqtt.publish:
topic: "domoticz/in"
payload: !lambda |-
float v41 = id(bs_hardware_protection).state;
char buffer[20];
memset(buffer, 0, sizeof(buffer)); // Clear the buffer before use
snprintf(buffer, sizeof(buffer), "%.1f", v41);
int nvalue = (v41 > 0) ? 1 : 0;
return "{\"idx\":86,\"nvalue\":" + std::to_string(nvalue) + ",\"svalue\":\"" + std::string(buffer) + "\"}";
retain: true
qos: 1
```
```
- platform: modbus_controller
modbus_controller_id: pv1800
setup_priority: 8
name: "Charging State"
id: charging_state
address: 15203
value_type: U_WORD
register_type: holding
on_value:
then:
- mqtt.publish:
topic: "domoticz/in"
payload: !lambda |-
float v23 = id(charging_state).state;
char buffer[20];
memset(buffer, 0, sizeof(buffer)); // Clear the buffer before use
snprintf(buffer, sizeof(buffer), "%.1f", v23);
return "{\"idx\":141,\"nvalue\":0,\"svalue\":\"" + std::string(buffer) + "\"}";
retain: true
qos: 2
```
```
- platform: modbus_controller
modbus_controller_id: pv1800
setup_priority: 8
name: "PV Voltage"
id: pv_voltage
address: 15205
value_type: U_WORD
register_type: holding
unit_of_measurement: "V"
accuracy_decimals: 1
filters:
- multiply: 0.1
on_value:
then:
- mqtt.publish:
topic: "domoticz/in"
payload: !lambda |-
float v24 = id(pv_voltage).state;
char buffer[20];
memset(buffer, 0, sizeof(buffer)); // Clear the buffer before use
snprintf(buffer, sizeof(buffer), "%.1f", v24);
return "{\"idx\":104,\"nvalue\":0,\"svalue\":\"" + std::string(buffer) + "\"}";
retain: true
qos: 2
```
excel file with register addreses First step and idea taken from https://forum.arturhome.pl/t/inwerter-volt-polska-sinus-pro-ultra/6343
Created by: lencz.sla@gmail.com