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https://github.com/orlopau/go-sma-api
Provides a http api and a cli for reading sma inverters, energy meters and plants. Supports auto discovery.
https://github.com/orlopau/go-sma-api
energymeter iot pv sma sunspec
Last synced: about 2 months ago
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Provides a http api and a cli for reading sma inverters, energy meters and plants. Supports auto discovery.
- Host: GitHub
- URL: https://github.com/orlopau/go-sma-api
- Owner: orlopau
- License: mit
- Created: 2020-12-01T17:34:08.000Z (about 4 years ago)
- Default Branch: master
- Last Pushed: 2021-02-27T11:00:04.000Z (almost 4 years ago)
- Last Synced: 2024-06-20T19:23:28.701Z (6 months ago)
- Topics: energymeter, iot, pv, sma, sunspec
- Language: Go
- Homepage:
- Size: 114 KB
- Stars: 9
- Watchers: 2
- Forks: 1
- Open Issues: 2
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# GoEnergy-API
[](https://coveralls.io/github/orlopau/go-sma-api?branch=master)
GoSMAApi provides tooling for interacting with plants of SMA devices. Included are a CLI Application and a Server
providing an API for interacting with SunSpec compatible plants.
## Table of Contents
* [Energy-CLI](#energy-cli)
+ [Fetch](#fetch)
* [Energy-API](#energy-api)
+ [Configuration](#configuration)
+ [Endpoints](#endpoints)
+ [Docker](#docker)
## Energy-CLI
The application provides a simple command-line application for retrieving data from a plant using SunSpec compatible
devices.
Documentation is provided by calling `energy-cli help`.
### Fetch
`fetch` fetches data from a plant. It automatically detects the device type (e.g. PV-Inverter, Battery-Inverter). The
data is refreshed every 10 seconds.
If the device implements a register containing a valid device address, the address is set automatically. Else, a modbus
slave id can be provided using the `-id` parameter.
This table contains some slave IDs:
| Manufacturer | Slave ID |
| ------------ | -------- |
| SMA | 126 |
In case the manufacturer of your inverter isn't listed here, you can probably find some documentation by searching for
`< your device > modbus api`.
**Example:**
Given three devices with the following IP addresses:
| Device | IP |
| --- | --- |
| SMA Sunny Boy 2.5 | 192.1.1.1 |
| SMA Sunny Boy 6.0 | 192.1.1.2 |
| SMA Sunny Boy Storage 6.0 | 192.1.1.3 |
First, the modbus (TCP) functionality must be unlocked using the configuration interface of the device. With SMA devices
we can also set a custom port there, the standard port is **502**.
The command should then be `energy-cli fetch -id 126 -a 192.1.1.1:502 -a 192.1.1.2:502 -a 192.1.1.3:502`.
If everything is successful, the output resembles something similar to this:
```
2020/12/21 20:28:54 connecting to 192.1.1.1:502...
2020/12/21 20:28:54 connected to 192.1.1.1:502
2020/12/21 20:28:54 connecting to 192.1.1.2:502...
2020/12/21 20:28:54 connected to 192.1.1.2:502
2020/12/21 20:28:54 connecting to 192.1.1.3:502...
2020/12/21 20:28:54 connected to 192.1.1.3:502
+--------------------+-------+-----+
| ADDRESS | POWER | SOC |
+--------------------+-------+-----+
| 192.168.1.1:502 | 123W | |
| 192.168.1.2:502 | 300W | |
| 192.168.1.3:502 | -20W | 68% |
+--------------------+-------+-----+
```
## Energy-API
The server provides access to aggregated data of a plant via an HTTP API. A configuration file describing the plant and
its devices is required.
Data is fetched after a message from the plant's energy meter is received, to retrieve the most accurate data for a
point in time. By default, the energymeter sends a message each second, resulting in a refresh interval of 1 second on
the server.
### Configuration
*Environment Variables:*
| Environment Variable | Info | Default |
| --- | --- | --- |
| ENERGY_PORT | Port of the server | 8080 |
| ENERGY_CONFIG_PATH | Path to the plant config | . |
*Plant config:*
The server must be configured using a .yml file, called `plants.yml`.
Example:
```yaml
plant1: # name of the plant
sunspec: # SunSpec compatible devices
- "192.168.188.30:502" # ip address pointing to a modbus TCP endpoint
- "192.168.188.31:502"
- "192.168.188.32:502"
- "192.168.188.34:502"
energymeter: "1901401956" # energymeter serial number
plant2:
sunspec:
- "192.168.188.35:502"
- "192.168.188.36:502"
energymeter: "3006138525"
```
### Endpoints
`GET /v1/summary` Returns a summary of the energy flow in one or multiple plants. The unit of each value is **watts**.
```json
{
"plant1": {
"grid": 1.9,
"pv": 0,
"battery": 120,
"selfConsumption": 121.9,
"batterySoC": 45,
"timestampStart": 1608579392,
"timestampEnd": 1608579392
},
"plant2": {
"grid": 929.2,
"pv": 0,
"battery": 0,
"selfConsumption": 929.2,
"batterySoC": 14,
"timestampStart": 1608579392,
"timestampEnd": 1608579392
}
}
```
### Docker
A docker image is provided for your convenience. It can be
found [here](https://hub.docker.com/repository/docker/orlopau/go-energy-api).
**Example Usage:**
`docker run -v /path/to/plant.yml:/go/src/app/plants.yml -p 8080:8080 orlopau/go-energy-api`
## Links
* SunSpec modbus resources: https://sunspec.org/sunspec-modbus-home/
* SMA developer documentation: https://www.sma.de/en/products/sma-developer.html
## Licensing
The code in this project is licensed under MIT License.