REST-light is a simple microservice to control 433Mhz wireless sockets over HTTP, e.g. on a RaspberryPi. The main usage is an easy integration of 433Mhz wireless sockets in SmartHome Tools like openHAB or ioBroker.
The project is an API-Wrapper around the famous 443Utils project.
- How to Use
- curl request example
- OpenHAB integration example for the
sendbinary - OpenHAB integration example for the
codesendbinary - Security considerations
- Versioning & docker tags
- Contribution
- Credits
The setup is very simple. There is nothing to configure, except running the container. For the app to be able to persist the API-Key, ensure the mounted volume is writeable for UID/GID 33.
- Install Docker on your RaspberryPi
- Attach a 433Mhz transmitter to WiringPi Pin 2 of your RaspberryPi
- Run REST-light and receive the generated API-Key from
docker logson first startup. - Try your first request! For an example, see section "curl request example"
For the app to be able to use the Pi's GPIO-PINs, they need to be exposed to the container. There are multiple options to do this, as explained here.
From the ones available, i had the best experience using the "device-approach" as stated below.
docker run -d --device /dev/gpiomem -v <your-path>/rest-light:/etc/rest-light -p 4242:4242 uupascal/rest-light:DEV-latestversion: "3.8"
services:
rest-light:
container_name: REST-light
image: "uupascal/rest-light:latest"
restart: unless-stopped
volumes:
- "<your-path>/rest-light:/etc/rest-light"
devices:
- /dev/gpiomem
ports:
- 4242
curl http://127.0.0.1:4242/send \
--data-urlencode "api_key=<key from docker logs>" \
--data-urlencode "system_code=10000" \
--data-urlencode "unit_code=2" \
--data-urlencode "state=0"
curl http://127.0.0.1:4242/codesend \
--data-urlencode "api_key=<key from docker logs>" \
--data-urlencode "decimalcode=500000" \
--data-urlencode "protocol=optional" \
--data-urlencode "pulselength=optional" \
--data-urlencode "bitlength=optional"In this example, new devices can be added by simply adding a switch to the group gREST_light, whichs name is in the format
example_<SYSTEM_CODE>_<UNIT_CODE>.
The included rule receives the values from the item name, as soon as any item in the group is triggered.
RESTlight.items
Group:Switch:OR(OFF, ON) gREST_light "REST-light" <light> ["Location"]
Switch RESTLight_10000_1 "Light" <light> (mygroup, gREST_light) ["Switch"]
Switch RESTLight_01000_3 "Light2" <light> (mygroup, gREST_light) ["Switch"]
Switch RESTLight_00100_3 "Light3" <light> (mygroup, gREST_light) ["Switch"]
RESTlight.rules
rule "REST_light"
when
Member of gREST_light received command
then
logInfo("REST_light", "Member " + triggeringItem.name + " to " + receivedCommand)
try {
// receive system & unit code from item name
val sys_num = triggeringItem.name.toString.split("_").get(1)
val unit_num = triggeringItem.name.toString.split("_").get(2)
var String state = ""
if(receivedCommand == ON) {
state = "1"
} if(receivedCommand == OFF) {
state = "0"
}
var String jsonstring = (
'{"api_key" : "<INSERT KEY HERE>", "system_code" : "' +
sys_num + '", "unit_code" : "' + unit_num + '", "state" : "' + state + '"}'
)
sendHttpPostRequest("http://<INSERT IP HERE>:4242/send", "application/json", jsonstring.toString, 5000)
logInfo("REST_light", jsonstring.toString)
logInfo("REST_light", "Finished command!")
} catch(Throwable t) {
logInfo("REST_light", "Caught exception during attempt to contact REST_light API!")
}
end
In this example, new devices can be added by simply adding a switch to the group gREST_light, whichs name is in the format
example_<DECIMALCODE FOR ON>_<DECIMALCODE FOR OFF>.
The included rule receives the values from the item name, as soon as any item in the group is triggered.
RESTlight.items
Group:Switch:OR(OFF, ON) gREST_light "REST-light" <light> ["Location"]
Switch zap_1234567_2345678_key1 "Light" <light> (mygroup, gREST_light) ["Switch"]
Switch zap2_1234567_2345678_key1 "Light2" <light> (mygroup, gREST_light) ["Switch"]
RESTlight.rules
rule "REST_light"
when
Member of gREST_light received command
then
logInfo("REST_light", "Member " + triggeringItem.name + " to " + receivedCommand)
try {
// receive decimal codes from item name, e.g. zap_1234567_2345678_key1
var decimal_code = ""
if(receivedCommand == ON) {
decimal_code = triggeringItem.name.toString.split("_").get(1)
} if(receivedCommand == OFF) {
decimal_code = triggeringItem.name.toString.split("_").get(2)
}
var protocol = "1"
var pulselength = "150"
var String jsonstring = ('{"api_key" : "<INSERT KEY HERE>", "decimalcode" : "' + decimal_code + '", "protocol" : "' + protocol + '", "pulselength" : "' + pulselength + '"}')
sendHttpPostRequest("http://<INSERT IP HERE>:4242/codesend", "application/json", jsonstring.toString, 5000)
logInfo("REST_light", jsonstring.toString)
logInfo("REST_light", "Finished command!")
} catch(Throwable t) {
logInfo("REST_light", "Caught exception during attempt to contact REST_light API!")
}
end
Although this project was developed with current security best-practices in mind, it is still built around software which was not updated for at least 6 years. I would therefor strongly encourage you to only use this container on private & trusted networks and to never expose it to the internet. As the license implies, this software is provided without warranty of any kind.
Use the docker tag latest to always get the latest stable image.
The images are also tagged with the current timestamp, so to pin to a static version, you can for example use the tag 2022.01.09-1746.
Unstable/Development versions are prefixed with DEV- and should only be used for testing purposes.
We love your input! For details see CONTRIBUTING.md
The project relies on 443Utils.
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