# [e-mobility charging stations simulator](https://github.com/sap/e-mobility-charging-stations-simulator)
+[](https://github.com/SAP/e-mobility-charging-stations-simulator/actions/workflows/ci.yml)
[](https://api.reuse.software/info/github.com/SAP/e-mobility-charging-stations-simulator)
## Summary
-Simple [node.js](https://nodejs.org/) software to simulate a set of charging stations based on the OCPP-J 1.6 protocol as part of SAP e-Mobility solution.
+Simple [node.js](https://nodejs.org/) software to simulate and scale a set of charging stations based on the OCPP-J protocol as part of [SAP e-Mobility](https://www.sap.com/products/scm/e-mobility.html) solution.
## Prerequisites
-Install the [node.js](https://nodejs.org/) LTS runtime environment:
+Install the [node.js](https://nodejs.org/) current LTS or superior version runtime environment:
### Windows
- [Chocolatey](https://chocolatey.org/):
```powershell
-choco install -y nodejs-lts
+choco install -y nodejs
```
### MacOSX
- [Homebrew](https://brew.sh/):
```shell
-brew install node@16
+brew install node
```
### GNU/Linux
## Installation
+Enable corepack if not already done and install latest pnpm version:
+
+```shell
+corepack enable
+corepack prepare pnpm@latest --activate
+```
+
In the repository root, run the following command:
```shell
-npm install
+pnpm install
```
## Initial configuration
Copy the configuration template file [src/assets/config-template.json](src/assets/config-template.json) to [src/assets/config.json](src/assets/config.json).
-Copy the authorization RFID tags template file [src/assets/authorization-tags-template.json](src/assets/authorization-tags-template.json) to [src/assets/authorization-tags.json](src/assets/authorization-tags.json).
+Copy the RFID tags template file [src/assets/idtags-template.json](src/assets/idtags-template.json) to [src/assets/idtags.json](src/assets/idtags.json).
Tweak them to your needs by following the section [configuration files syntax](README.md#configuration-files-syntax).
## Start
-To start the program, run: `npm start`.
+To start the program, run: `pnpm start`.
## Start Web UI
All charging station configuration templates are in the directory [src/assets/station-templates](src/assets/station-templates).
-A list of RFID tags must be defined for the automatic transaction generator with a default location and name: `src/assets/authorization-tags.json`. A template file is available at [src/assets/authorization-tags-template.json](src/assets/authorization-tags-template.json).
+A list of RFID tags must be defined for the automatic transaction generator in a file with the default location and name: `src/assets/idtags.json`. A template file is available at [src/assets/idtags-template.json](src/assets/idtags-template.json).
**Configuration files hierarchy and priority**:
2. charging station configuration template: [src/assets/station-templates](src/assets/station-templates);
3. charging stations simulator configuration: [src/assets/config.json](src/assets/config.json).
-The charging stations simulator have an automatic configuration files reload feature at change for:
+The charging stations simulator has an automatic configuration files reload feature at change for:
- charging stations simulator configuration;
- charging station configuration templates;
- charging station authorization RFID tags lists.
-But the modifications to test have to be done to the files in the build target directory [dist/assets](dist/assets). Once the modifications are finished, they have to be reported or copied to the matching files in the build source directory [src/assets](src/assets) to ensure they will be taken into account at next build.
+But the modifications to test have to be done to the files in the build target directory [dist/assets](dist/assets). Once the modifications are done, they have to be reported to the matching files in the build source directory [src/assets](src/assets) to ensure they will be taken into account at next build.
### Charging stations simulator configuration
| supervisionUrlDistribution | round-robin/random/charging-station-affinity | charging-station-affinity | boolean | supervision urls distribution policy to simulated charging stations |
| logStatisticsInterval | | 60 | integer | seconds between charging stations statistics output in the logs |
| logConsole | true/false | false | boolean | output logs on the console |
-| logFormat | | simple | string | winston log format |
+| logFormat | | simple | string | [winston](https://github.com/winstonjs/winston) log format |
| logRotate | true/false | true | boolean | enable daily log files rotation |
-| logMaxFiles | | 7 | integer | maximum number of log files to keep |
-| logLevel | emerg/alert/crit/error/warning/notice/info/debug | info | string | winston logging level |
+| logMaxFiles | x/"xd" where x is an integer | undefined | integer \| string | maximum number of log files: https://github.com/winstonjs/winston-daily-rotate-file#options |
+| logMaxSize | x/"xk"/"xm"/"xg" where x is a number | undefined | number \| string | maximum size of log files in bytes, or units of kb, mb, and gb: https://github.com/winstonjs/winston-daily-rotate-file#options |
+| logLevel | emerg/alert/crit/error/warning/notice/info/debug | info | string | [winston](https://github.com/winstonjs/winston) logging level |
| logFile | | combined.log | string | log file relative path |
| logErrorFile | | error.log | string | error log file relative path |
| worker | | {<br />"processType": "workerSet",<br />"startDelay": 500,<br />"elementStartDelay": 0,<br />"elementsPerWorker": 1,<br />"poolMinSize": 4,<br />"poolMaxSize": 16,<br />"poolStrategy": "ROUND_ROBIN"<br />} | {<br />processType: WorkerProcessType;<br />startDelay: number;<br />elementStartDelay: number;<br />elementsPerWorker: number;<br />poolMinSize: number;<br />poolMaxSize: number;<br />poolStrategy: WorkerChoiceStrategy;<br />} | Worker configuration section:<br />- processType: worker threads process type (workerSet/staticPool/dynamicPool)<br />- startDelay: milliseconds to wait at worker threads startup (only for workerSet threads process type)<br />- elementStartDelay: milliseconds to wait at charging station startup<br />- elementsPerWorker: number of charging stations per worker threads for the `workerSet` process type<br />- poolMinSize: worker threads pool minimum number of threads</br >- poolMaxSize: worker threads pool maximum number of threads<br />- poolStrategy: worker threads pool [poolifier](https://github.com/poolifier/poolifier) worker choice strategy |
-| uiServer | | {<br />"enabled": true,<br />"type": "ws",<br />"options": {<br />"host": "localhost",<br />"port": 8080<br />}<br />} | {<br />enabled: boolean;<br />type: ApplicationProtocol;<br />options: ServerOptions;<br />authentication: {<br />enabled: boolean;<br />type: AuthenticationType;<br />username: string;<br />password: string;<br />}<br />} | UI server configuration section |
+| uiServer | | {<br />"enabled": false,<br />"type": "ws",<br />"options": {<br />"host": "localhost",<br />"port": 8080<br />}<br />} | {<br />enabled: boolean;<br />type: ApplicationProtocol;<br />options: ServerOptions;<br />authentication: {<br />enabled: boolean;<br />type: AuthenticationType;<br />username: string;<br />password: string;<br />}<br />} | UI server configuration section |
| performanceStorage | | {<br />"enabled": false,<br />"type": "jsonfile",<br />"file:///performanceRecords.json"<br />} | {<br />enabled: boolean;<br />type: string;<br />URI: string;<br />}<br />where type can be 'jsonfile' or 'mongodb' | performance storage configuration section |
| stationTemplateUrls | | {}[] | {<br />file: string;<br />numberOfStations: number;<br />}[] | array of charging station configuration templates URIs configuration section (charging station configuration template file name and number of stations) |
**src/assets/station-templates/\<name\>.json**:
-| Key | Value(s) | Default Value | Value type | Description |
-| ---------------------------------- | ---------- | ----------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| supervisionUrls | | '' | string \| string[] | string or array of connection URIs to OCPP-J servers |
-| supervisionUser | | '' | string | basic HTTP authentication user to OCPP-J server |
-| supervisionPassword | | '' | string | basic HTTP authentication password to OCPP-J server |
-| supervisionUrlOcppConfiguration | true/false | false | boolean | allow supervision URL configuration via a vendor OCPP parameter key |
-| supervisionUrlOcppKey | | 'ConnectionUrl' | string | the vendor string that will be used as a vendor OCPP parameter key to set the supervision URL |
-| ocppVersion | 1.6 | 1.6 | string | OCPP version |
-| ocppProtocol | json | json | string | OCPP protocol |
-| ocppStrictCompliance | true/false | false | boolean | strict adherence to the OCPP version and protocol specifications |
-| ocppPersistentConfiguration | true/false | true | boolean | enable persistent OCPP parameters storage by charging stations 'hashId'. The persistency is ensured by the charging stations configuration files in dist/assets/configurations |
-| stationInfoPersistentConfiguration | true/false | true | boolean | enable persistent station information and specifications storage by charging stations 'hashId'. The persistency is ensured by the charging stations configuration files in dist/assets/configurations |
-| wsOptions | | {} | ClientOptions & ClientRequestArgs | [ws](https://github.com/websockets/ws) and node.js [http](https://nodejs.org/api/http.html) clients options intersection |
-| authorizationFile | | '' | string | RFID tags list file relative to src/assets path |
-| baseName | | '' | string | base name to build charging stations id |
-| nameSuffix | | '' | string | name suffix to build charging stations id |
-| fixedName | true/false | false | boolean | use the baseName as the charging stations unique name |
-| chargePointModel | | '' | string | charging stations model |
-| chargePointVendor | | '' | string | charging stations vendor |
-| chargePointSerialNumberPrefix | | '' | string | charge point serial number prefix |
-| chargeBoxSerialNumberPrefix | | '' | string | charge box serial number prefix (deprecated in OCPP 1.6) |
-| firmwareVersion | | '' | string | charging stations firmware version |
-| power | | | float \| float[] | charging stations maximum power value(s) |
-| powerSharedByConnectors | true/false | false | boolean | charging stations power shared by its connectors |
-| powerUnit | W/kW | W | string | charging stations power unit |
-| currentOutType | AC/DC | AC | string | charging stations current out type |
-| voltageOut | | AC:230/DC:400 | integer | charging stations voltage out |
-| numberOfPhases | 0/1/3 | AC:3/DC:0 | integer | charging stations number of phase(s) |
-| numberOfConnectors | | | integer \| integer[] | charging stations number of connector(s) |
-| useConnectorId0 | true/false | true | boolean | use connector id 0 definition from the charging station configuration template |
-| randomConnectors | true/false | false | boolean | randomize runtime connector id affectation from the connector id definition in charging station configuration template |
-| resetTime | | 60 | integer | seconds to wait before the charging stations come back at reset |
-| autoRegister | true/false | false | boolean | set charging stations as registered at boot notification for testing purpose |
-| autoReconnectMaxRetries | | -1 (unlimited) | integer | connection retries to the OCPP-J server |
-| reconnectExponentialDelay | true/false | false | boolean | connection delay retry to the OCPP-J server |
-| registrationMaxRetries | | -1 (unlimited) | integer | charging stations boot notification retries |
-| amperageLimitationOcppKey | | undefined | string | charging stations OCPP parameter key used to set the amperage limit, per phase for each connector on AC and global for DC |
-| amperageLimitationUnit | A/cA/dA/mA | A | string | charging stations amperage limit unit |
-| enableStatistics | true/false | true | boolean | enable charging stations statistics |
-| mustAuthorizeAtRemoteStart | true/false | true | boolean | always send authorize at remote start transaction when AuthorizeRemoteTxRequests is enabled |
-| payloadSchemaValidation | true/false | true | boolean | validate OCPP commands PDU against [OCA](https://www.openchargealliance.org/) JSON schemas |
-| beginEndMeterValues | true/false | false | boolean | enable Transaction.{Begin,End} MeterValues |
-| outOfOrderEndMeterValues | true/false | false | boolean | send Transaction.End MeterValues out of order. Need to relax OCPP specifications strict compliance ('ocppStrictCompliance' parameter) |
-| meteringPerTransaction | true/false | true | boolean | enable metering history on a per transaction basis |
-| transactionDataMeterValues | true/false | false | boolean | enable transaction data MeterValues at stop transaction |
-| mainVoltageMeterValues | true/false | true | boolean | include charging stations main voltage MeterValues on three phased charging stations |
-| phaseLineToLineVoltageMeterValues | true/false | true | boolean | include charging stations line to line voltage MeterValues on three phased charging stations |
-| customValueLimitationMeterValues | true/false | true | boolean | enable limitation on custom fluctuated value in MeterValues |
-| commandsSupport | | {<br />"incomingCommands": {},<br />"outgoingCommands": {}<br />} | {<br /> incomingCommands: Record<IncomingRequestCommand, boolean>;<br />outgoingCommands?: Record<RequestCommand, boolean>;<br />} | Configuration section for OCPP commands support. Empty section or subsections means all implemented OCPP commands are supported |
-| messageTriggerSupport | | {} | Record<MessageTrigger, boolean> | Configuration section for OCPP commands trigger support. Empty section means all implemented OCPP trigger commands are supported |
-| Configuration | | | ChargingStationConfiguration | charging stations OCPP parameters configuration section |
-| AutomaticTransactionGenerator | | | AutomaticTransactionGenerator | charging stations ATG configuration section |
-| Connectors | | | Connectors | charging stations connectors configuration section |
-
-#### Configuration section
+| Key | Value(s) | Default Value | Value type | Description |
+| ---------------------------------------------------- | ------------- | ----------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
+| supervisionUrls | | [] | string \| string[] | string or array of connection URIs to OCPP-J servers |
+| supervisionUser | | undefined | string | basic HTTP authentication user to OCPP-J server |
+| supervisionPassword | | undefined | string | basic HTTP authentication password to OCPP-J server |
+| supervisionUrlOcppConfiguration | true/false | false | boolean | allow supervision URL configuration via a vendor OCPP parameter key |
+| supervisionUrlOcppKey | | 'ConnectionUrl' | string | the vendor string that will be used as a vendor OCPP parameter key to set the supervision URL |
+| ocppVersion | 1.6/2.0/2.0.1 | 1.6 | string | OCPP version |
+| ocppProtocol | json | json | string | OCPP protocol |
+| ocppStrictCompliance | true/false | false | boolean | strict adherence to the OCPP version and protocol specifications |
+| ocppPersistentConfiguration | true/false | true | boolean | enable persistent OCPP parameters storage by charging stations 'hashId'. The persistency is ensured by the charging stations configuration files in [dist/assets/configurations](dist/assets/configurations) |
+| stationInfoPersistentConfiguration | true/false | true | boolean | enable persistent station information and specifications storage by charging stations 'hashId'. The persistency is ensured by the charging stations configuration files in [dist/assets/configurations](dist/assets/configurations) |
+| automaticTransactionGeneratorPersistentConfiguration | true/false | true | boolean | enable persistent automatic transaction generator configuration storage by charging stations 'hashId'. The persistency is ensured by the charging stations configuration files in [dist/assets/configurations](dist/assets/configurations) |
+| wsOptions | | {} | ClientOptions & ClientRequestArgs | [ws](https://github.com/websockets/ws) and node.js [http](https://nodejs.org/api/http.html) clients options intersection |
+| idTagsFile | | undefined | string | RFID tags list file relative to [src/assets](src/assets) path |
+| baseName | | undefined | string | base name to build charging stations id |
+| nameSuffix | | undefined | string | name suffix to build charging stations id |
+| fixedName | true/false | false | boolean | use the baseName as the charging stations unique name |
+| chargePointModel | | undefined | string | charging stations model |
+| chargePointVendor | | undefined | string | charging stations vendor |
+| chargePointSerialNumberPrefix | | undefined | string | charge point serial number prefix |
+| chargeBoxSerialNumberPrefix | | undefined | string | charge box serial number prefix (deprecated in OCPP 1.6) |
+| firmwareVersionPattern | | Semantic versionning regular expression: https://semver.org/#is-there-a-suggested-regular-expression-regex-to-check-a-semver-string | string | charging stations firmware version pattern |
+| firmwareVersion | | undefined | string | charging stations firmware version |
+| power | | | float \| float[] | charging stations maximum power value(s) |
+| powerSharedByConnectors | true/false | false | boolean | charging stations power shared by its connectors |
+| powerUnit | W/kW | W | string | charging stations power unit |
+| currentOutType | AC/DC | AC | string | charging stations current out type |
+| voltageOut | | AC:230/DC:400 | integer | charging stations voltage out |
+| numberOfPhases | 0/1/3 | AC:3/DC:0 | integer | charging stations number of phase(s) |
+| numberOfConnectors | | | integer \| integer[] | charging stations number of connector(s) |
+| useConnectorId0 | true/false | true | boolean | use connector id 0 definition from the charging station configuration template |
+| randomConnectors | true/false | false | boolean | randomize runtime connector id affectation from the connector id definition in charging station configuration template |
+| resetTime | | 60 | integer | seconds to wait before the charging stations come back at reset |
+| autoRegister | true/false | false | boolean | set charging stations as registered at boot notification for testing purpose |
+| autoReconnectMaxRetries | | -1 (unlimited) | integer | connection retries to the OCPP-J server |
+| reconnectExponentialDelay | true/false | false | boolean | connection delay retry to the OCPP-J server |
+| registrationMaxRetries | | -1 (unlimited) | integer | charging stations boot notification retries |
+| amperageLimitationOcppKey | | undefined | string | charging stations OCPP parameter key used to set the amperage limit, per phase for each connector on AC and global for DC |
+| amperageLimitationUnit | A/cA/dA/mA | A | string | charging stations amperage limit unit |
+| enableStatistics | true/false | false | boolean | enable charging stations statistics |
+| mustAuthorizeAtRemoteStart | true/false | true | boolean | always send authorize at remote start transaction when AuthorizeRemoteTxRequests is enabled |
+| payloadSchemaValidation | true/false | true | boolean | validate OCPP commands PDU against [OCA](https://www.openchargealliance.org/) JSON schemas |
+| beginEndMeterValues | true/false | false | boolean | enable Transaction.{Begin,End} MeterValues |
+| outOfOrderEndMeterValues | true/false | false | boolean | send Transaction.End MeterValues out of order. Need to relax OCPP specifications strict compliance ('ocppStrictCompliance' parameter) |
+| meteringPerTransaction | true/false | true | boolean | enable metering history on a per transaction basis |
+| transactionDataMeterValues | true/false | false | boolean | enable transaction data MeterValues at stop transaction |
+| mainVoltageMeterValues | true/false | true | boolean | include charging stations main voltage MeterValues on three phased charging stations |
+| phaseLineToLineVoltageMeterValues | true/false | false | boolean | include charging stations line to line voltage MeterValues on three phased charging stations |
+| customValueLimitationMeterValues | true/false | true | boolean | enable limitation on custom fluctuated value in MeterValues |
+| firmwareUpgrade | | {<br />"versionUpgrade": {<br />"step": 1<br />},<br />"reset": true<br />} | {<br />versionUpgrade: {<br />patternGroup: number;<br />step: number;<br />};<br />reset: boolean;<br />failureStatus: 'DownloadFailed' \| 'InstallationFailed';<br />} | Configuration section for simulating firmware upgrade support. |
+| commandsSupport | | {<br />"incomingCommands": {},<br />"outgoingCommands": {}<br />} | {<br /> incomingCommands: Record<IncomingRequestCommand, boolean>;<br />outgoingCommands?: Record<RequestCommand, boolean>;<br />} | Configuration section for OCPP commands support. Empty section or subsections means all implemented OCPP commands are supported |
+| messageTriggerSupport | | {} | Record<MessageTrigger, boolean> | Configuration section for OCPP commands trigger support. Empty section means all implemented OCPP trigger commands are supported |
+| Configuration | | | ChargingStationOcppConfiguration | charging stations OCPP parameters configuration section |
+| AutomaticTransactionGenerator | | | AutomaticTransactionGeneratorConfiguration | charging stations ATG configuration section |
+| Connectors | | | Record<string, ConnectorStatus> | charging stations connectors configuration section |
+| Evses | | | Record<string, EvseTemplate> | charging stations EVSEs configuration section |
+
+#### Configuration section syntax example
```json
"Configuration": {
}
```
-#### AutomaticTransactionGenerator section
+#### AutomaticTransactionGenerator section syntax example
-Section type definition:
+##### Type definition:
```ts
type AutomaticTransactionGeneratorConfiguration = {
};
```
-Section example:
+##### Example:
```json
"AutomaticTransactionGenerator": {
}
```
-#### Connectors section
+#### Connectors section syntax example
```json
"Connectors": {
...
{
"unit": "A",
- "measurand": "Current.Import"
+ "measurand": "Current.Import",
+ "minimum": "0.5"
},
...
{
},
```
+#### Evses section syntax example
+
+```json
+ "Evses": {
+ "0": {
+ "Connectors": {
+ "0": {}
+ }
+ },
+ "1": {
+ "Connectors": {
+ "1": {
+ "bootStatus": "Available",
+ "MeterValues": [
+ ...
+ {
+ "unit": "W",
+ "measurand": "Power.Active.Import",
+ "phase": "L1-N",
+ "value": "5000",
+ "fluctuationPercent": "10"
+ },
+ ...
+ {
+ "unit": "A",
+ "measurand": "Current.Import",
+ "minimum": "0.5"
+ },
+ ...
+ {
+ "unit": "Wh"
+ },
+ ...
+ ]
+ }
+ }
+ }
+ },
+```
+
### Charging station configuration
**dist/assets/configurations/\<hashId\>.json**:
The syntax is similar to the charging station configuration template 'Configuration' section.
+#### automaticTransactionGenerator section
+
+The syntax is similar to the charging station configuration template 'AutomaticTransactionGenerator' section.
+
## Docker
In the [docker](./docker) folder:
- :white_check_mark: GetDiagnostics
- :white_check_mark: DiagnosticsStatusNotification
-- :x: FirmwareStatusNotification
-- :x: UpdateFirmware
+- :white_check_mark: FirmwareStatusNotification
+- :white_check_mark: UpdateFirmware
#### Local Auth List Management Profile
- :white_check_mark: TriggerMessage
+### Version 2.x.x
+
+#### Provisioning
+
+- :white_check_mark: BootNotification
+
+#### Authorization
+
+- :white_check_mark: ClearCache
+
+#### Availability
+
+- :white_check_mark: StatusNotification
+- :white_check_mark: Heartbeat
+
## OCPP-J standard parameters supported
-All kind of OCPP parameters are supported in a charging station configuration or a charging station configuration template file. The list here mention the standard ones also handled automatically in the simulator.
+All kind of OCPP parameters are supported in charging station configuration or charging station configuration template file. The list here mention the standard ones also handled automatically in the simulator.
### Version 1.6
- _none_
+### Version 2.x.x
+
## UI protocol
Protocol to control the simulator via a Websocket or HTTP server.
### HTTP Protocol
-To learn how to use the HTTP protocol to pilot the simulator, an [Insomnia](https://insomnia.rest/) requests collection is available in [src/assets/ui-protocol](./src/assets/ui-protocol) directory.
+To learn how to use the HTTP protocol to pilot the simulator, an [Insomnia](https://insomnia.rest/) HTTP requests collection is available in [src/assets/ui-protocol](./src/assets/ui-protocol) directory.
### Websocket Protocol
`uuid`: String uniquely linking the response to the request
`PDU`: Response parameters to requested procedure
+An [Insomnia](https://insomnia.rest/) WebSocket requests collection is available in [src/assets/ui-protocol](./src/assets/ui-protocol) directory.
+
#### Version 0.0.1
Set the Websocket header _Sec-Websocket-Protocol_ to `ui0.0.1`.
- Request:
`ProcedureName`: 'startChargingStation'
`PDU`: {
- `hashIds`: charging station unique identifier strings array (optional, default: all charging stations),
- `responsesFailed`: failed responses payload array (optional)
+ `hashIds`: charging station unique identifier strings array (optional, default: all charging stations)
}
- Response:
`status`: 'success' | 'failure',
`hashIdsSucceeded`: charging station unique identifier strings array,
`hashIdsFailed`: charging station unique identifier strings array (optional)
+ `responsesFailed`: failed responses payload array (optional)
}
###### Stop Charging Station
## Licensing
-Copyright 2020-2022 SAP SE or an SAP affiliate company and e-mobility-charging-stations-simulator contributors. Please see our [LICENSE](LICENSE) for copyright and license information. Detailed information including third-party components and their licensing/copyright information is available [via the REUSE tool](https://api.reuse.software/info/github.com/SAP/e-mobility-charging-stations-simulator).
+Copyright 2020-2023 SAP SE or an SAP affiliate company and e-mobility-charging-stations-simulator contributors. Please see our [LICENSE](LICENSE) for copyright and license information. Detailed information including third-party components and their licensing/copyright information is available [via the REUSE tool](https://api.reuse.software/info/github.com/SAP/e-mobility-charging-stations-simulator).
repositories / e-mobility-charging-stations-simulator.git / blobdiff